diff options
author | grehan <grehan@FreeBSD.org> | 2011-05-13 04:54:01 +0000 |
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committer | grehan <grehan@FreeBSD.org> | 2011-05-13 04:54:01 +0000 |
commit | d45b7f14ae6fa78882fa9ec3be976733ca4767b4 (patch) | |
tree | 4af898a91c7d67e7068687610ebc68f1cbdf3b2e /usr.sbin/bhyve | |
parent | 1430f46faf0f3eb24ffcd28a3248a565a48236ac (diff) | |
download | FreeBSD-src-d45b7f14ae6fa78882fa9ec3be976733ca4767b4.zip FreeBSD-src-d45b7f14ae6fa78882fa9ec3be976733ca4767b4.tar.gz |
Import of bhyve hypervisor and utilities, part 1.
vmm.ko - kernel module for VT-x, VT-d and hypervisor control
bhyve - user-space sequencer and i/o emulation
vmmctl - dump of hypervisor register state
libvmm - front-end to vmm.ko chardev interface
bhyve was designed and implemented by Neel Natu.
Thanks to the following folk from NetApp who helped to make this available:
Joe CaraDonna
Peter Snyder
Jeff Heller
Sandeep Mann
Steve Miller
Brian Pawlowski
Diffstat (limited to 'usr.sbin/bhyve')
27 files changed, 5893 insertions, 0 deletions
diff --git a/usr.sbin/bhyve/Makefile b/usr.sbin/bhyve/Makefile new file mode 100644 index 0000000..71df082 --- /dev/null +++ b/usr.sbin/bhyve/Makefile @@ -0,0 +1,18 @@ +# +# $FreeBSD$ +# + +PROG= bhyve + +SRCS= atpic.c consport.c dbgport.c elcr.c fbsdrun.c inout.c mevent.c +SRCS+= pci_emul.c pci_hostbridge.c pci_passthru.c pci_virtio_block.c +SRCS+= pci_virtio_net.c pit_8254.c post.c rtc.c uart.c xmsr.c + +NO_MAN= + +DPADD= ${LIBVMMAPI} ${LIBMD} ${LIBPTHREAD} +LDADD= -lvmmapi -lmd -lpthread + +CFLAGS+= -I${.CURDIR}/../../sys + +.include <bsd.prog.mk> diff --git a/usr.sbin/bhyve/atpic.c b/usr.sbin/bhyve/atpic.c new file mode 100644 index 0000000..a9fb084 --- /dev/null +++ b/usr.sbin/bhyve/atpic.c @@ -0,0 +1,68 @@ +/*- + * Copyright (c) 2011 NetApp, Inc. + * All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * 1. Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * + * THIS SOFTWARE IS PROVIDED BY NETAPP, INC ``AS IS'' AND + * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE + * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE + * ARE DISCLAIMED. IN NO EVENT SHALL NETAPP, INC OR CONTRIBUTORS BE LIABLE + * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL + * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS + * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) + * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT + * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY + * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF + * SUCH DAMAGE. + * + * $FreeBSD$ + */ + +#include <sys/cdefs.h> +__FBSDID("$FreeBSD$"); + +#include <sys/param.h> + +#include <stdio.h> +#include <string.h> +#include <assert.h> + +#include "inout.h" + +/* + * FreeBSD only writes to the 8259 interrupt controllers to put them in a + * shutdown state. + * + * So, we just ignore the writes. + */ + +#define IO_ICU1 0x20 +#define IO_ICU2 0xA0 +#define ICU_IMR_OFFSET 1 + +static int +atpic_handler(struct vmctx *ctx, int vcpu, int in, int port, int bytes, + uint32_t *eax, void *arg) +{ + if (bytes != 1) + return (-1); + + if (in) + return (-1); + + /* Pretend all writes to the 8259 are alright */ + return (0); +} + +INOUT_PORT(atpic, IO_ICU1, IOPORT_F_INOUT, atpic_handler); +INOUT_PORT(atpic, IO_ICU1 + ICU_IMR_OFFSET, IOPORT_F_INOUT, atpic_handler); +INOUT_PORT(atpic, IO_ICU2, IOPORT_F_INOUT, atpic_handler); +INOUT_PORT(atpic, IO_ICU2 + ICU_IMR_OFFSET, IOPORT_F_INOUT, atpic_handler); diff --git a/usr.sbin/bhyve/consport.c b/usr.sbin/bhyve/consport.c new file mode 100644 index 0000000..34f94a6 --- /dev/null +++ b/usr.sbin/bhyve/consport.c @@ -0,0 +1,121 @@ +/*- + * Copyright (c) 2011 NetApp, Inc. + * All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * 1. Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * + * THIS SOFTWARE IS PROVIDED BY NETAPP, INC ``AS IS'' AND + * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE + * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE + * ARE DISCLAIMED. IN NO EVENT SHALL NETAPP, INC OR CONTRIBUTORS BE LIABLE + * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL + * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS + * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) + * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT + * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY + * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF + * SUCH DAMAGE. + * + * $FreeBSD$ + */ + +#include <sys/cdefs.h> +__FBSDID("$FreeBSD$"); + +#include <sys/types.h> +#include <sys/select.h> + +#include <stdio.h> +#include <stdlib.h> +#include <termios.h> +#include <unistd.h> +#include <stdbool.h> + +#include "inout.h" + +#define BVM_CONSOLE_PORT 0x220 + +static struct termios tio_orig, tio_new; + +static void +ttyclose(void) +{ + tcsetattr(STDIN_FILENO, TCSANOW, &tio_orig); +} + +static void +ttyopen(void) +{ + tcgetattr(STDIN_FILENO, &tio_orig); + + cfmakeraw(&tio_new); + tcsetattr(STDIN_FILENO, TCSANOW, &tio_new); + + atexit(ttyclose); +} + +static bool +tty_char_available(void) +{ + fd_set rfds; + struct timeval tv; + + FD_ZERO(&rfds); + FD_SET(STDIN_FILENO, &rfds); + tv.tv_sec = 0; + tv.tv_usec = 0; + if (select(STDIN_FILENO + 1, &rfds, NULL, NULL, &tv) > 0) { + return (true); + } else { + return (false); + } +} + +static int +ttyread(void) +{ + char rb; + + if (tty_char_available()) { + read(STDIN_FILENO, &rb, 1); + return (rb & 0xff); + } else { + return (-1); + } +} + +static void +ttywrite(unsigned char wb) +{ + (void) write(STDOUT_FILENO, &wb, 1); +} + +static int +console_handler(struct vmctx *ctx, int vcpu, int in, int port, int bytes, + uint32_t *eax, void *arg) +{ + static int opened; + + if (bytes != 4) + return (-1); + + if (!opened) { + ttyopen(); + opened = 1; + } + + if (in) + *eax = ttyread(); + else + ttywrite(*eax); + + return (0); +} +INOUT_PORT(console, BVM_CONSOLE_PORT, IOPORT_F_INOUT, console_handler); diff --git a/usr.sbin/bhyve/dbgport.c b/usr.sbin/bhyve/dbgport.c new file mode 100644 index 0000000..be919e1 --- /dev/null +++ b/usr.sbin/bhyve/dbgport.c @@ -0,0 +1,124 @@ +/*- + * Copyright (c) 2011 NetApp, Inc. + * All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * 1. Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * + * THIS SOFTWARE IS PROVIDED BY NETAPP, INC ``AS IS'' AND + * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE + * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE + * ARE DISCLAIMED. IN NO EVENT SHALL NETAPP, INC OR CONTRIBUTORS BE LIABLE + * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL + * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS + * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) + * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT + * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY + * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF + * SUCH DAMAGE. + * + * $FreeBSD$ + */ + +#include <sys/cdefs.h> +__FBSDID("$FreeBSD$"); + +#include <sys/types.h> +#include <sys/socket.h> +#include <netinet/in.h> +#include <sys/uio.h> + +#include <stdio.h> +#include <stdlib.h> +#include <fcntl.h> +#include <unistd.h> +#include <errno.h> + +#include "inout.h" + +#define BVM_DBG_PORT 0x224 + +static int listen_fd, conn_fd; + +static struct sockaddr_in sin; + +void +init_dbgport(int sport) +{ + conn_fd = -1; + + if ((listen_fd = socket(AF_INET, SOCK_STREAM, 0)) < 0) { + perror("socket"); + exit(1); + } + + sin.sin_len = sizeof(sin); + sin.sin_family = AF_INET; + sin.sin_addr.s_addr = htonl(INADDR_ANY); + sin.sin_port = htons(sport); + + if (bind(listen_fd, (struct sockaddr *)&sin, sizeof(sin)) < 0) { + perror("bind"); + exit(1); + } + + if (listen(listen_fd, 1) < 0) { + perror("listen"); + exit(1); + } +} + +static int +dbg_handler(struct vmctx *ctx, int vcpu, int in, int port, int bytes, + uint32_t *eax, void *arg) +{ + char ch; + int nwritten, nread, printonce; + + if (bytes != 4) + return (-1); + +again: + printonce = 0; + while (conn_fd < 0) { + if (!printonce) { + printf("Waiting for connection from gdb\r\n"); + printonce = 1; + } + conn_fd = accept(listen_fd, NULL, NULL); + if (conn_fd >= 0) + fcntl(conn_fd, F_SETFL, O_NONBLOCK); + else if (errno != EINTR) + perror("accept"); + } + + if (in) { + nread = read(conn_fd, &ch, 1); + if (nread == -1 && errno == EAGAIN) + *eax = -1; + else if (nread == 1) + *eax = ch; + else { + close(conn_fd); + conn_fd = -1; + goto again; + } + } else { + ch = *eax; + nwritten = write(conn_fd, &ch, 1); + if (nwritten != 1) { + close(conn_fd); + conn_fd = -1; + goto again; + } + } + return (0); +} + +INOUT_PORT(dbg, BVM_DBG_PORT, IOPORT_F_INOUT, dbg_handler); diff --git a/usr.sbin/bhyve/dbgport.h b/usr.sbin/bhyve/dbgport.h new file mode 100644 index 0000000..8c7dab7 --- /dev/null +++ b/usr.sbin/bhyve/dbgport.h @@ -0,0 +1,36 @@ +/*- + * Copyright (c) 2011 NetApp, Inc. + * All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * 1. Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * + * THIS SOFTWARE IS PROVIDED BY NETAPP, INC ``AS IS'' AND + * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE + * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE + * ARE DISCLAIMED. IN NO EVENT SHALL NETAPP, INC OR CONTRIBUTORS BE LIABLE + * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL + * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS + * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) + * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT + * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY + * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF + * SUCH DAMAGE. + * + * $FreeBSD$ + */ + +#ifndef _DBGPORT_H_ +#define _DBGPORT_H_ + +#define DEFAULT_GDB_PORT 6466 + +void init_dbgport(int port); + +#endif diff --git a/usr.sbin/bhyve/elcr.c b/usr.sbin/bhyve/elcr.c new file mode 100644 index 0000000..2417ae1 --- /dev/null +++ b/usr.sbin/bhyve/elcr.c @@ -0,0 +1,65 @@ +/*- + * Copyright (c) 2011 NetApp, Inc. + * All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * 1. Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * + * THIS SOFTWARE IS PROVIDED BY NETAPP, INC ``AS IS'' AND + * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE + * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE + * ARE DISCLAIMED. IN NO EVENT SHALL NETAPP, INC OR CONTRIBUTORS BE LIABLE + * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL + * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS + * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) + * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT + * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY + * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF + * SUCH DAMAGE. + * + * $FreeBSD$ + */ + +#include <sys/cdefs.h> +__FBSDID("$FreeBSD$"); + +#include <sys/types.h> + +#include "inout.h" + +/* + * EISA interrupt Level Control Register. + * + * This is a 16-bit register with one bit for each of the IRQ0 through IRQ15. + * A level triggered irq is indicated by setting the corresponding bit to '1'. + */ +#define ELCR_PORT 0x4d0 + +static uint8_t elcr[2] = { 0x00, 0x00 }; + +static int +elcr_handler(struct vmctx *ctx, int vcpu, int in, int port, int bytes, + uint32_t *eax, void *arg) +{ + int idx; + + if (bytes != 1) + return (-1); + + idx = port - ELCR_PORT; + + if (in) + *eax = elcr[idx]; + else + elcr[idx] = *eax; + + return (0); +} +INOUT_PORT(elcr, ELCR_PORT + 0, IOPORT_F_INOUT, elcr_handler); +INOUT_PORT(elcr, ELCR_PORT + 1, IOPORT_F_INOUT, elcr_handler); diff --git a/usr.sbin/bhyve/fbsdrun.c b/usr.sbin/bhyve/fbsdrun.c new file mode 100644 index 0000000..ddbe709b --- /dev/null +++ b/usr.sbin/bhyve/fbsdrun.c @@ -0,0 +1,650 @@ +/*- + * Copyright (c) 2011 NetApp, Inc. + * All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * 1. Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * + * THIS SOFTWARE IS PROVIDED BY NETAPP, INC ``AS IS'' AND + * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE + * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE + * ARE DISCLAIMED. IN NO EVENT SHALL NETAPP, INC OR CONTRIBUTORS BE LIABLE + * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL + * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS + * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) + * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT + * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY + * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF + * SUCH DAMAGE. + * + * $FreeBSD$ + */ + +#include <sys/cdefs.h> +__FBSDID("$FreeBSD$"); + +#include <sys/types.h> +#include <sys/mman.h> +#include <sys/time.h> + +#include <machine/segments.h> + +#include <stdio.h> +#include <stdlib.h> +#include <libgen.h> +#include <unistd.h> +#include <assert.h> +#include <errno.h> +#include <signal.h> +#include <pthread.h> + +#include <machine/vmm.h> +#include <vmmapi.h> + +#include "fbsdrun.h" +#include "inout.h" +#include "dbgport.h" +#include "mevent.h" +#include "pci_emul.h" +#include "xmsr.h" + +#define DEFAULT_GUEST_HZ 100 +#define DEFAULT_GUEST_TSLICE 200 + +#define GUEST_NIO_PORT 0x488 /* guest upcalls via i/o port */ + +#define VMEXIT_SWITCH 0 /* force vcpu switch in mux mode */ +#define VMEXIT_CONTINUE 1 /* continue from next instruction */ +#define VMEXIT_RESTART 2 /* restart current instruction */ +#define VMEXIT_ABORT 3 /* abort the vm run loop */ +#define VMEXIT_RESET 4 /* guest machine has reset */ + +#define MB (1024UL * 1024) +#define GB (1024UL * MB) + +typedef int (*vmexit_handler_t)(struct vmctx *, struct vm_exit *, int *vcpu); + +int guest_tslice = DEFAULT_GUEST_TSLICE; +int guest_hz = DEFAULT_GUEST_HZ; +char *vmname; + +u_long lomem_sz; +u_long himem_sz; + +int guest_ncpus; + +static int pincpu = -1; +static int guest_vcpu_mux; +static int guest_vmexit_on_hlt, guest_vmexit_on_pause; + +static int foundcpus; + +static char *lomem_addr; +static char *himem_addr; + +static char *progname; +static const int BSP = 0; + +static int cpumask; + +static void *oem_tbl_start; +static int oem_tbl_size; + +static void vm_loop(struct vmctx *ctx, int vcpu, uint64_t rip); + +struct vm_exit vmexit[VM_MAXCPU]; + +struct fbsdstats { + uint64_t vmexit_bogus; + uint64_t vmexit_bogus_switch; + uint64_t vmexit_hlt; + uint64_t vmexit_pause; + uint64_t vmexit_mtrap; + uint64_t cpu_switch_rotate; + uint64_t cpu_switch_direct; + int io_reset; +} stats; + +struct mt_vmm_info { + pthread_t mt_thr; + struct vmctx *mt_ctx; + int mt_vcpu; +} mt_vmm_info[VM_MAXCPU]; + +static void +usage(int code) +{ + + fprintf(stderr, + "Usage: %s [-hBHP][-g <gdb port>][-z <hz>][-s <pci>][-p pincpu]" + "[-n <pci>][-m lowmem][-M highmem] <vm>\n" + " -g: gdb port (default is %d and 0 means don't open)\n" + " -c: # cpus (default 1)\n" + " -p: pin vcpu 'n' to host cpu 'pincpu + n'\n" + " -B: inject breakpoint exception on vm entry\n" + " -H: vmexit from the guest on hlt\n" + " -P: vmexit from the guest on pause\n" + " -h: help\n" + " -z: guest hz (default is %d)\n" + " -s: <slot,driver,configinfo> PCI slot config\n" + " -n: <slot,name> PCI slot naming\n" + " -m: lowmem in MB\n" + " -M: highmem in MB\n" + " -x: mux vcpus to 1 hcpu\n" + " -t: mux vcpu timeslice hz (default %d)\n", + progname, DEFAULT_GDB_PORT, DEFAULT_GUEST_HZ, + DEFAULT_GUEST_TSLICE); + exit(code); +} + +void * +paddr_guest2host(uintptr_t gaddr) +{ + if (lomem_sz == 0) + return (NULL); + + if (gaddr < lomem_sz) { + return ((void *)(lomem_addr + gaddr)); + } else if (gaddr >= 4*GB && gaddr < (4*GB + himem_sz)) { + return ((void *)(himem_addr + gaddr - 4*GB)); + } else + return (NULL); +} + +void +fbsdrun_add_oemtbl(void *tbl, int tblsz) +{ + oem_tbl_start = tbl; + oem_tbl_size = tblsz; +} + +int +fbsdrun_vmexit_on_pause(void) +{ + + return (guest_vmexit_on_pause); +} + +int +fbsdrun_vmexit_on_hlt(void) +{ + + return (guest_vmexit_on_hlt); +} + +int +fbsdrun_muxed(void) +{ + + return (guest_vcpu_mux); +} + +void * +fbsdrun_start_thread(void *param) +{ + int vcpu; + struct mt_vmm_info *mtp = param; + + vcpu = mtp->mt_vcpu; + vm_loop(mtp->mt_ctx, vcpu, vmexit[vcpu].rip); + + /* not reached */ + exit(1); + return (NULL); +} + +void +fbsdrun_addcpu(struct vmctx *ctx, int vcpu, uint64_t rip) +{ + int error; + + if (cpumask & (1 << vcpu)) { + printf("addcpu: attempting to add existing cpu %d\n", vcpu); + exit(1); + } + + cpumask |= 1 << vcpu; + foundcpus++; + + /* + * Set up the vmexit struct to allow execution to start + * at the given RIP + */ + vmexit[vcpu].rip = rip; + vmexit[vcpu].inst_length = 0; + + if (vcpu == BSP || !guest_vcpu_mux){ + mt_vmm_info[vcpu].mt_ctx = ctx; + mt_vmm_info[vcpu].mt_vcpu = vcpu; + + error = pthread_create(&mt_vmm_info[vcpu].mt_thr, NULL, + fbsdrun_start_thread, &mt_vmm_info[vcpu]); + assert(error == 0); + } +} + +static int +fbsdrun_get_next_cpu(int curcpu) +{ + + /* + * Get the next available CPU. Assumes they arrive + * in ascending order with no gaps. + */ + return ((curcpu + 1) % foundcpus); +} + +int +vmexit_catch_reset(void) +{ + stats.io_reset++; + return (VMEXIT_RESET); +} + +int +vmexit_catch_inout(void) +{ + return (VMEXIT_ABORT); +} + +int +vmexit_handle_notify(struct vmctx *ctx, struct vm_exit *vme, int *pvcpu, + uint32_t eax) +{ +#if PG_DEBUG /* put all types of debug here */ + if (eax == 0) { + pause_noswitch = 1; + } else if (eax == 1) { + pause_noswitch = 0; + } else { + pause_noswitch = 0; + if (eax == 5) { + vm_set_capability(ctx, *pvcpu, VM_CAP_MTRAP_EXIT, 1); + } + } +#endif + return (VMEXIT_CONTINUE); +} + +static int +vmexit_inout(struct vmctx *ctx, struct vm_exit *vme, int *pvcpu) +{ + int error; + int bytes, port, in, out; + uint32_t eax; + int vcpu; + + vcpu = *pvcpu; + + port = vme->u.inout.port; + bytes = vme->u.inout.bytes; + eax = vme->u.inout.eax; + in = vme->u.inout.in; + out = !in; + + /* We don't deal with these */ + if (vme->u.inout.string || vme->u.inout.rep) + return (VMEXIT_ABORT); + + /* Special case of guest reset */ + if (out && port == 0x64 && (uint8_t)eax == 0xFE) + return (vmexit_catch_reset()); + + /* Extra-special case of host notifications */ + if (out && port == GUEST_NIO_PORT) + return (vmexit_handle_notify(ctx, vme, pvcpu, eax)); + + error = emulate_inout(ctx, vcpu, in, port, bytes, &eax); + if (error == 0 && in) + error = vm_set_register(ctx, vcpu, VM_REG_GUEST_RAX, eax); + + if (error == 0) + return (VMEXIT_CONTINUE); + else { + fprintf(stderr, "Unhandled %s%c 0x%04x\n", + in ? "in" : "out", + bytes == 1 ? 'b' : (bytes == 2 ? 'w' : 'l'), port); + return (vmexit_catch_inout()); + } +} + +static int +vmexit_rdmsr(struct vmctx *ctx, struct vm_exit *vme, int *pvcpu) +{ + printf("vm exit rdmsr 0x%x, cpu %d\n", vme->u.msr.code, *pvcpu); + return (VMEXIT_ABORT); +} + +static int +vmexit_wrmsr(struct vmctx *ctx, struct vm_exit *vme, int *pvcpu) +{ + int newcpu; + int retval = VMEXIT_CONTINUE; + + newcpu = emulate_wrmsr(ctx, *pvcpu, vme->u.msr.code,vme->u.msr.wval); + + if (guest_vcpu_mux && *pvcpu != newcpu) { + retval = VMEXIT_SWITCH; + *pvcpu = newcpu; + } + + return (retval); +} + +static int +vmexit_vmx(struct vmctx *ctx, struct vm_exit *vmexit, int *pvcpu) +{ + + printf("vm exit[%d]\n", *pvcpu); + printf("\treason\t\tVMX\n"); + printf("\trip\t\t0x%016lx\n", vmexit->rip); + printf("\tinst_length\t%d\n", vmexit->inst_length); + printf("\terror\t\t%d\n", vmexit->u.vmx.error); + printf("\texit_reason\t%u\n", vmexit->u.vmx.exit_reason); + printf("\tqualification\t0x%016lx\n", vmexit->u.vmx.exit_qualification); + + return (VMEXIT_ABORT); +} + +static int bogus_noswitch = 1; + +static int +vmexit_bogus(struct vmctx *ctx, struct vm_exit *vmexit, int *pvcpu) +{ + stats.vmexit_bogus++; + + if (!guest_vcpu_mux || guest_ncpus == 1 || bogus_noswitch) { + return (VMEXIT_RESTART); + } else { + stats.vmexit_bogus_switch++; + vmexit->inst_length = 0; + *pvcpu = -1; + return (VMEXIT_SWITCH); + } +} + +static int +vmexit_hlt(struct vmctx *ctx, struct vm_exit *vmexit, int *pvcpu) +{ + stats.vmexit_hlt++; + if (fbsdrun_muxed()) { + *pvcpu = -1; + return (VMEXIT_SWITCH); + } else { + /* + * Just continue execution with the next instruction. We use + * the HLT VM exit as a way to be friendly with the host + * scheduler. + */ + return (VMEXIT_CONTINUE); + } +} + +static int pause_noswitch; + +static int +vmexit_pause(struct vmctx *ctx, struct vm_exit *vmexit, int *pvcpu) +{ + stats.vmexit_pause++; + + if (fbsdrun_muxed() && !pause_noswitch) { + *pvcpu = -1; + return (VMEXIT_SWITCH); + } else { + return (VMEXIT_CONTINUE); + } +} + +static int +vmexit_mtrap(struct vmctx *ctx, struct vm_exit *vmexit, int *pvcpu) +{ + stats.vmexit_mtrap++; + + return (VMEXIT_RESTART); +} + +static void +sigalrm(int sig) +{ + return; +} + +static void +setup_timeslice(void) +{ + struct sigaction sa; + struct itimerval itv; + int error; + + /* + * Setup a realtime timer to generate a SIGALRM at a + * frequency of 'guest_tslice' ticks per second. + */ + sigemptyset(&sa.sa_mask); + sa.sa_flags = 0; + sa.sa_handler = sigalrm; + + error = sigaction(SIGALRM, &sa, NULL); + assert(error == 0); + + itv.it_interval.tv_sec = 0; + itv.it_interval.tv_usec = 1000000 / guest_tslice; + itv.it_value.tv_sec = 0; + itv.it_value.tv_usec = 1000000 / guest_tslice; + + error = setitimer(ITIMER_REAL, &itv, NULL); + assert(error == 0); +} + +static vmexit_handler_t handler[VM_EXITCODE_MAX] = { + [VM_EXITCODE_INOUT] = vmexit_inout, + [VM_EXITCODE_VMX] = vmexit_vmx, + [VM_EXITCODE_BOGUS] = vmexit_bogus, + [VM_EXITCODE_RDMSR] = vmexit_rdmsr, + [VM_EXITCODE_WRMSR] = vmexit_wrmsr, + [VM_EXITCODE_MTRAP] = vmexit_mtrap, +}; + +static void +vm_loop(struct vmctx *ctx, int vcpu, uint64_t rip) +{ + int error, rc, prevcpu; + + if (guest_vcpu_mux) + setup_timeslice(); + + if (pincpu >= 0) { + error = vm_set_pinning(ctx, vcpu, pincpu + vcpu); + assert(error == 0); + } + + while (1) { + error = vm_run(ctx, vcpu, rip, &vmexit[vcpu]); + if (error != 0) + break; + + prevcpu = vcpu; + rc = (*handler[vmexit[vcpu].exitcode])(ctx, &vmexit[vcpu], + &vcpu); + switch (rc) { + case VMEXIT_SWITCH: + assert(guest_vcpu_mux); + if (vcpu == -1) { + stats.cpu_switch_rotate++; + vcpu = fbsdrun_get_next_cpu(prevcpu); + } else { + stats.cpu_switch_direct++; + } + /* fall through */ + case VMEXIT_CONTINUE: + rip = vmexit[vcpu].rip + vmexit[vcpu].inst_length; + break; + case VMEXIT_RESTART: + rip = vmexit[vcpu].rip; + break; + case VMEXIT_RESET: + exit(0); + default: + exit(1); + } + } + fprintf(stderr, "vm_run error %d, errno %d\n", error, errno); +} + + +int +main(int argc, char *argv[]) +{ + int c, error, gdb_port, inject_bkpt, tmp, err; + struct vmctx *ctx; + uint64_t rip; + + inject_bkpt = 0; + progname = basename(argv[0]); + gdb_port = DEFAULT_GDB_PORT; + guest_ncpus = 1; + + while ((c = getopt(argc, argv, "hBHPxp:g:c:z:s:n:m:M:")) != -1) { + switch (c) { + case 'B': + inject_bkpt = 1; + break; + case 'x': + guest_vcpu_mux = 1; + break; + case 'p': + pincpu = atoi(optarg); + break; + case 'c': + guest_ncpus = atoi(optarg); + break; + case 'g': + gdb_port = atoi(optarg); + break; + case 'z': + guest_hz = atoi(optarg); + break; + case 't': + guest_tslice = atoi(optarg); + break; + case 's': + pci_parse_slot(optarg); + break; + case 'n': + pci_parse_name(optarg); + break; + case 'm': + lomem_sz = strtoul(optarg, NULL, 0) * MB; + break; + case 'M': + himem_sz = strtoul(optarg, NULL, 0) * MB; + break; + case 'H': + guest_vmexit_on_hlt = 1; + break; + case 'P': + guest_vmexit_on_pause = 1; + break; + case 'h': + usage(0); + default: + usage(1); + } + } + argc -= optind; + argv += optind; + + if (argc != 1) + usage(1); + + /* No need to mux if guest is uni-processor */ + if (guest_ncpus <= 1) + guest_vcpu_mux = 0; + + /* vmexit on hlt if guest is muxed */ + if (guest_vcpu_mux) { + guest_vmexit_on_hlt = 1; + guest_vmexit_on_pause = 1; + } + + vmname = argv[0]; + + ctx = vm_open(vmname); + if (ctx == NULL) { + perror("vm_open"); + exit(1); + } + + if (fbsdrun_vmexit_on_hlt()) { + err = vm_get_capability(ctx, BSP, VM_CAP_HALT_EXIT, &tmp); + if (err < 0) { + printf("VM exit on HLT not supported\n"); + exit(1); + } + vm_set_capability(ctx, BSP, VM_CAP_HALT_EXIT, 1); + handler[VM_EXITCODE_HLT] = vmexit_hlt; + } + + if (fbsdrun_vmexit_on_pause()) { + /* + * pause exit support required for this mode + */ + err = vm_get_capability(ctx, BSP, VM_CAP_PAUSE_EXIT, &tmp); + if (err < 0) { + printf("SMP mux requested, no pause support\n"); + exit(1); + } + vm_set_capability(ctx, BSP, VM_CAP_PAUSE_EXIT, 1); + handler[VM_EXITCODE_PAUSE] = vmexit_pause; + } + + if (lomem_sz != 0) { + lomem_addr = vm_map_memory(ctx, 0, lomem_sz); + if (lomem_addr == (char *) MAP_FAILED) { + lomem_sz = 0; + } else if (himem_sz != 0) { + himem_addr = vm_map_memory(ctx, 4*GB, himem_sz); + if (himem_addr == (char *) MAP_FAILED) { + lomem_sz = 0; + himem_sz = 0; + } + } + } + + init_inout(); + init_pci(ctx); + + if (gdb_port != 0) + init_dbgport(gdb_port); + + error = vm_get_register(ctx, BSP, VM_REG_GUEST_RIP, &rip); + assert(error == 0); + + if (inject_bkpt) { + error = vm_inject_event(ctx, BSP, VM_HW_EXCEPTION, IDT_BP); + assert(error == 0); + } + + /* + * build the guest tables, MP etc. + */ + vm_build_tables(ctx, guest_ncpus, oem_tbl_start, oem_tbl_size); + + /* + * Add CPU 0 + */ + fbsdrun_addcpu(ctx, BSP, rip); + + /* + * Head off to the main event dispatch loop + */ + mevent_dispatch(); + + exit(1); +} diff --git a/usr.sbin/bhyve/fbsdrun.h b/usr.sbin/bhyve/fbsdrun.h new file mode 100644 index 0000000..8106122 --- /dev/null +++ b/usr.sbin/bhyve/fbsdrun.h @@ -0,0 +1,53 @@ +/*- + * Copyright (c) 2011 NetApp, Inc. + * All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * 1. Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * + * THIS SOFTWARE IS PROVIDED BY NETAPP, INC ``AS IS'' AND + * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE + * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE + * ARE DISCLAIMED. IN NO EVENT SHALL NETAPP, INC OR CONTRIBUTORS BE LIABLE + * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL + * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS + * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) + * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT + * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY + * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF + * SUCH DAMAGE. + * + * $FreeBSD$ + */ + +#ifndef _FBSDRUN_H_ +#define _FBSDRUN_H_ + +#ifndef CTASSERT /* Allow lint to override */ +#define CTASSERT(x) _CTASSERT(x, __LINE__) +#define _CTASSERT(x, y) __CTASSERT(x, y) +#define __CTASSERT(x, y) typedef char __assert ## y[(x) ? 1 : -1] +#endif + +struct vmctx; +extern int guest_hz; +extern int guest_tslice; +extern int guest_ncpus; +extern char *vmname; + +extern u_long lomem_sz, himem_sz; + +void *paddr_guest2host(uintptr_t); + +void fbsdrun_addcpu(struct vmctx *ctx, int cpu, uint64_t rip); +void fbsdrun_add_oemtbl(void *tbl, int tblsz); +int fbsdrun_muxed(void); +int fbsdrun_vmexit_on_hlt(void); +int fbsdrun_vmexit_on_pause(void); +#endif diff --git a/usr.sbin/bhyve/inout.c b/usr.sbin/bhyve/inout.c new file mode 100644 index 0000000..84445b1 --- /dev/null +++ b/usr.sbin/bhyve/inout.c @@ -0,0 +1,98 @@ +/*- + * Copyright (c) 2011 NetApp, Inc. + * All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * 1. Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * + * THIS SOFTWARE IS PROVIDED BY NETAPP, INC ``AS IS'' AND + * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE + * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE + * ARE DISCLAIMED. IN NO EVENT SHALL NETAPP, INC OR CONTRIBUTORS BE LIABLE + * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL + * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS + * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) + * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT + * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY + * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF + * SUCH DAMAGE. + * + * $FreeBSD$ + */ + +#include <sys/cdefs.h> +__FBSDID("$FreeBSD$"); + +#include <sys/param.h> +#include <sys/linker_set.h> + +#include <stdio.h> +#include <assert.h> + +#include "inout.h" + +SET_DECLARE(inout_port_set, struct inout_port); + +#define MAX_IOPORTS (1 << 16) + +static struct { + const char *name; + int flags; + inout_func_t handler; + void *arg; +} inout_handlers[MAX_IOPORTS]; + +int +emulate_inout(struct vmctx *ctx, int vcpu, int in, int port, int bytes, + uint32_t *eax) +{ + int flags; + inout_func_t handler; + void *arg; + + assert(port < MAX_IOPORTS); + + if ((handler = inout_handlers[port].handler) == NULL) + return (-1); + + flags = inout_handlers[port].flags; + arg = inout_handlers[port].arg; + + if ((in && (flags & IOPORT_F_IN)) || (!in && (flags & IOPORT_F_OUT))) + return ((*handler)(ctx, vcpu, in, port, bytes, eax, arg)); + else + return (-1); +} + +void +init_inout(void) +{ + struct inout_port **iopp, *iop; + + SET_FOREACH(iopp, inout_port_set) { + iop = *iopp; + assert(iop->port < MAX_IOPORTS); + inout_handlers[iop->port].name = iop->name; + inout_handlers[iop->port].flags = iop->flags; + inout_handlers[iop->port].handler = iop->handler; + inout_handlers[iop->port].arg = NULL; + } +} + +int +register_inout(struct inout_port *iop) +{ + assert(iop->port < MAX_IOPORTS); + inout_handlers[iop->port].name = iop->name; + inout_handlers[iop->port].flags = iop->flags; + inout_handlers[iop->port].handler = iop->handler; + inout_handlers[iop->port].arg = iop->arg; + + return (0); +} diff --git a/usr.sbin/bhyve/inout.h b/usr.sbin/bhyve/inout.h new file mode 100644 index 0000000..7b8a4a6 --- /dev/null +++ b/usr.sbin/bhyve/inout.h @@ -0,0 +1,64 @@ +/*- + * Copyright (c) 2011 NetApp, Inc. + * All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * 1. Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * + * THIS SOFTWARE IS PROVIDED BY NETAPP, INC ``AS IS'' AND + * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE + * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE + * ARE DISCLAIMED. IN NO EVENT SHALL NETAPP, INC OR CONTRIBUTORS BE LIABLE + * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL + * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS + * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) + * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT + * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY + * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF + * SUCH DAMAGE. + * + * $FreeBSD$ + */ + +#ifndef _INOUT_H_ +#define _INOUT_H_ + +#include <sys/linker_set.h> + +struct vmctx; + +typedef int (*inout_func_t)(struct vmctx *ctx, int vcpu, int in, int port, + int bytes, uint32_t *eax, void *arg); + +struct inout_port { + const char *name; + int port; + int flags; + inout_func_t handler; + void *arg; +}; +#define IOPORT_F_IN 0x1 +#define IOPORT_F_OUT 0x2 +#define IOPORT_F_INOUT 0x3 + +#define INOUT_PORT(name, port, flags, handler) \ + static struct inout_port __CONCAT(__inout_port, __LINE__) = { \ + #name, \ + (port), \ + (flags), \ + (handler) \ + }; \ + DATA_SET(inout_port_set, __CONCAT(__inout_port, __LINE__)) + +void init_inout(void); +int emulate_inout(struct vmctx *, int vcpu, int in, int port, int bytes, + uint32_t *eax); +int register_inout(struct inout_port *iop); + +#endif /* _INOUT_H_ */ diff --git a/usr.sbin/bhyve/mevent.c b/usr.sbin/bhyve/mevent.c new file mode 100644 index 0000000..0d3b287 --- /dev/null +++ b/usr.sbin/bhyve/mevent.c @@ -0,0 +1,419 @@ +/*- + * Copyright (c) 2011 NetApp, Inc. + * All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * 1. Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * + * THIS SOFTWARE IS PROVIDED BY NETAPP, INC ``AS IS'' AND + * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE + * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE + * ARE DISCLAIMED. IN NO EVENT SHALL NETAPP, INC OR CONTRIBUTORS BE LIABLE + * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL + * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS + * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) + * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT + * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY + * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF + * SUCH DAMAGE. + * + * $FreeBSD$ + */ + +/* + * Micro event library for FreeBSD, designed for a single i/o thread + * using kqueue, and having events be persistent by default. + */ + +#include <sys/cdefs.h> +__FBSDID("$FreeBSD$"); + +#include <assert.h> +#include <errno.h> +#include <stdlib.h> +#include <stdio.h> +#include <string.h> +#include <unistd.h> + +#include <sys/types.h> +#include <sys/event.h> +#include <sys/time.h> + +#include <pthread.h> + +#include "mevent.h" + +#define MEVENT_MAX 64 + +#define MEV_ENABLE 1 +#define MEV_DISABLE 2 +#define MEV_DEL_PENDING 3 + +static pthread_t mevent_tid; +static int mevent_pipefd[2]; +static pthread_mutex_t mevent_lmutex = PTHREAD_MUTEX_INITIALIZER; + +struct mevent { + void (*me_func)(int, enum ev_type, void *); + int me_fd; + enum ev_type me_type; + void *me_param; + int me_cq; + int me_state; + int me_closefd; + LIST_ENTRY(mevent) me_list; +}; + +static LIST_HEAD(listhead, mevent) global_head, change_head; + +static void +mevent_qlock(void) +{ + pthread_mutex_lock(&mevent_lmutex); +} + +static void +mevent_qunlock(void) +{ + pthread_mutex_unlock(&mevent_lmutex); +} + +static void +mevent_pipe_read(int fd, enum ev_type type, void *param) +{ + char buf[MEVENT_MAX]; + int status; + + /* + * Drain the pipe read side. The fd is non-blocking so this is + * safe to do. + */ + do { + status = read(fd, buf, sizeof(buf)); + } while (status == MEVENT_MAX); +} + +static void +mevent_notify(void) +{ + char c; + + /* + * If calling from outside the i/o thread, write a byte on the + * pipe to force the i/o thread to exit the blocking kevent call. + */ + if (mevent_pipefd[1] != 0 && pthread_self() != mevent_tid) { + write(mevent_pipefd[1], &c, 1); + } +} + +static int +mevent_kq_filter(struct mevent *mevp) +{ + int retval; + + retval = 0; + + if (mevp->me_type == EVF_READ) + retval = EVFILT_READ; + + if (mevp->me_type == EVF_WRITE) + retval = EVFILT_WRITE; + + return (retval); +} + +static int +mevent_kq_flags(struct mevent *mevp) +{ + int ret; + + switch (mevp->me_state) { + case MEV_ENABLE: + ret = EV_ADD; + break; + case MEV_DISABLE: + ret = EV_DISABLE; + break; + case MEV_DEL_PENDING: + ret = EV_DELETE; + break; + } + + return (ret); +} + +static int +mevent_kq_fflags(struct mevent *mevp) +{ + /* XXX nothing yet, perhaps EV_EOF for reads ? */ + return (0); +} + +static int +mevent_build(int mfd, struct kevent *kev) +{ + struct mevent *mevp, *tmpp; + int i; + + i = 0; + + mevent_qlock(); + + LIST_FOREACH_SAFE(mevp, &change_head, me_list, tmpp) { + if (mevp->me_closefd) { + /* + * A close of the file descriptor will remove the + * event + */ + close(mevp->me_fd); + } else { + kev[i].ident = mevp->me_fd; + kev[i].filter = mevent_kq_filter(mevp); + kev[i].flags = mevent_kq_flags(mevp); + kev[i].fflags = mevent_kq_fflags(mevp); + kev[i].data = 0; + kev[i].udata = mevp; + i++; + } + + mevp->me_cq = 0; + LIST_REMOVE(mevp, me_list); + + if (mevp->me_state == MEV_DEL_PENDING) { + free(mevp); + } else { + LIST_INSERT_HEAD(&global_head, mevp, me_list); + } + + assert(i < MEVENT_MAX); + } + + mevent_qunlock(); + + return (i); +} + +static void +mevent_handle(struct kevent *kev, int numev) +{ + struct mevent *mevp; + int i; + + for (i = 0; i < numev; i++) { + mevp = kev[i].udata; + + /* XXX check for EV_ERROR ? */ + + (*mevp->me_func)(mevp->me_fd, mevp->me_type, mevp->me_param); + } +} + +struct mevent * +mevent_add(int fd, enum ev_type type, + void (*func)(int, enum ev_type, void *), void *param) +{ + struct mevent *lp, *mevp; + + if (fd < 0 || func == NULL) { + return (NULL); + } + + mevp = NULL; + + mevent_qlock(); + + /* + * Verify that the fd/type tuple is not present in any list + */ + LIST_FOREACH(lp, &global_head, me_list) { + if (lp->me_fd == fd && lp->me_type == type) { + goto exit; + } + } + + LIST_FOREACH(lp, &change_head, me_list) { + if (lp->me_fd == fd && lp->me_type == type) { + goto exit; + } + } + + /* + * Allocate an entry, populate it, and add it to the change list. + */ + mevp = malloc(sizeof(struct mevent)); + if (mevp == NULL) { + goto exit; + } + + memset(mevp, 0, sizeof(struct mevent)); + mevp->me_fd = fd; + mevp->me_type = type; + mevp->me_func = func; + mevp->me_param = param; + + LIST_INSERT_HEAD(&change_head, mevp, me_list); + mevp->me_cq = 1; + mevp->me_state = MEV_ENABLE; + mevent_notify(); + +exit: + mevent_qunlock(); + + return (mevp); +} + +static int +mevent_update(struct mevent *evp, int newstate) +{ + /* + * It's not possible to enable/disable a deleted event + */ + if (evp->me_state == MEV_DEL_PENDING) + return (EINVAL); + + /* + * No update needed if state isn't changing + */ + if (evp->me_state == newstate) + return (0); + + mevent_qlock(); + + evp->me_state = newstate; + + /* + * Place the entry onto the changed list if not already there. + */ + if (evp->me_cq == 0) { + evp->me_cq = 1; + LIST_REMOVE(evp, me_list); + LIST_INSERT_HEAD(&change_head, evp, me_list); + mevent_notify(); + } + + mevent_qunlock(); + + return (0); +} + +int +mevent_enable(struct mevent *evp) +{ + + return (mevent_update(evp, MEV_ENABLE)); +} + +int +mevent_disable(struct mevent *evp) +{ + + return (mevent_update(evp, MEV_DISABLE)); +} + +static int +mevent_delete_event(struct mevent *evp, int closefd) +{ + mevent_qlock(); + + /* + * Place the entry onto the changed list if not already there, and + * mark as to be deleted. + */ + if (evp->me_cq == 0) { + evp->me_cq = 1; + LIST_REMOVE(evp, me_list); + LIST_INSERT_HEAD(&change_head, evp, me_list); + mevent_notify(); + } + evp->me_state = MEV_DEL_PENDING; + + if (closefd) + evp->me_closefd = 1; + + mevent_qunlock(); + + return (0); +} + +int +mevent_delete(struct mevent *evp) +{ + + return (mevent_delete_event(evp, 0)); +} + +int +mevent_delete_close(struct mevent *evp) +{ + + return (mevent_delete_event(evp, 1)); +} + +void +mevent_dispatch(void) +{ + struct kevent changelist[MEVENT_MAX]; + struct kevent eventlist[MEVENT_MAX]; + struct mevent *pipev; + int mfd; + int numev; + int ret; + + mevent_tid = pthread_self(); + + mfd = kqueue(); + assert(mfd > 0); + + /* + * Open the pipe that will be used for other threads to force + * the blocking kqueue call to exit by writing to it. Set the + * descriptor to non-blocking. + */ + ret = pipe(mevent_pipefd); + if (ret < 0) { + perror("pipe"); + exit(0); + } + + /* + * Add internal event handler for the pipe write fd + */ + pipev = mevent_add(mevent_pipefd[0], EVF_READ, mevent_pipe_read, NULL); + assert(pipev != NULL); + + for (;;) { + /* + * Build changelist if required. + * XXX the changelist can be put into the blocking call + * to eliminate the extra syscall. Currently better for + * debug. + */ + numev = mevent_build(mfd, changelist); + if (numev) { + ret = kevent(mfd, changelist, numev, NULL, 0, NULL); + if (ret == -1) { + perror("Error return from kevent change"); + } + } + + /* + * Block awaiting events + */ + ret = kevent(mfd, NULL, 0, eventlist, MEVENT_MAX, NULL); + if (ret == -1) { + perror("Error return from kevent monitor"); + } + + /* + * Handle reported events + */ + mevent_handle(eventlist, ret); + } +} diff --git a/usr.sbin/bhyve/mevent.h b/usr.sbin/bhyve/mevent.h new file mode 100644 index 0000000..32a9d74 --- /dev/null +++ b/usr.sbin/bhyve/mevent.h @@ -0,0 +1,49 @@ +/*- + * Copyright (c) 2011 NetApp, Inc. + * All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * 1. Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * + * THIS SOFTWARE IS PROVIDED BY NETAPP, INC ``AS IS'' AND + * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE + * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE + * ARE DISCLAIMED. IN NO EVENT SHALL NETAPP, INC OR CONTRIBUTORS BE LIABLE + * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL + * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS + * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) + * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT + * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY + * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF + * SUCH DAMAGE. + * + * $FreeBSD$ + */ + +#ifndef _MEVENT_H_ +#define _MEVENT_H_ + +enum ev_type { + EVF_READ, + EVF_WRITE +}; + +struct mevent; + +struct mevent *mevent_add(int fd, enum ev_type type, + void (*func)(int, enum ev_type, void *), + void *param); +int mevent_enable(struct mevent *evp); +int mevent_disable(struct mevent *evp); +int mevent_delete(struct mevent *evp); +int mevent_delete_close(struct mevent *evp); + +void mevent_dispatch(void); + +#endif /* _MEVENT_H_ */ diff --git a/usr.sbin/bhyve/mevent_test.c b/usr.sbin/bhyve/mevent_test.c new file mode 100644 index 0000000..c72a497 --- /dev/null +++ b/usr.sbin/bhyve/mevent_test.c @@ -0,0 +1,180 @@ +/*- + * Copyright (c) 2011 NetApp, Inc. + * All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * 1. Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * + * THIS SOFTWARE IS PROVIDED BY NETAPP, INC ``AS IS'' AND + * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE + * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE + * ARE DISCLAIMED. IN NO EVENT SHALL NETAPP, INC OR CONTRIBUTORS BE LIABLE + * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL + * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS + * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) + * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT + * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY + * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF + * SUCH DAMAGE. + * + * $FreeBSD$ + */ + +/* + * Test program for the micro event library. Set up a simple TCP echo + * service. + * + * cc mevent_test.c mevent.c -lpthread + */ + +#include <sys/types.h> +#include <sys/socket.h> +#include <netinet/in.h> + +#include <stdio.h> +#include <stdlib.h> +#include <pthread.h> + +#include "mevent.h" + +#define TEST_PORT 4321 + +static pthread_mutex_t accept_mutex = PTHREAD_MUTEX_INITIALIZER; +static pthread_cond_t accept_condvar = PTHREAD_COND_INITIALIZER; + +#define MEVENT_ECHO + +#ifdef MEVENT_ECHO +struct esync { + pthread_mutex_t e_mt; + pthread_cond_t e_cond; +}; + +static void +echoer_callback(int fd, enum ev_type type, void *param) +{ + struct esync *sync = param; + + pthread_mutex_lock(&sync->e_mt); + pthread_cond_signal(&sync->e_cond); + pthread_mutex_unlock(&sync->e_mt); +} + +static void * +echoer(void *param) +{ + struct esync sync; + struct mevent *mev; + char buf[128]; + int fd = (int)(uintptr_t) param; + int len; + + pthread_mutex_init(&sync.e_mt, NULL); + pthread_cond_init(&sync.e_cond, NULL); + + pthread_mutex_lock(&sync.e_mt); + + mev = mevent_add(fd, EVF_READ, echoer_callback, &sync); + if (mev == NULL) { + printf("Could not allocate echoer event\n"); + exit(1); + } + + while (!pthread_cond_wait(&sync.e_cond, &sync.e_mt)) { + len = read(fd, buf, sizeof(buf)); + if (len > 0) { + write(fd, buf, len); + write(0, buf, len); + } else { + break; + } + } + + mevent_delete_close(mev); + + pthread_mutex_unlock(&sync.e_mt); + pthread_mutex_destroy(&sync.e_mt); + pthread_cond_destroy(&sync.e_cond); +} + +#else + +static void * +echoer(void *param) +{ + char buf[128]; + int fd = (int)(uintptr_t) param; + int len; + + while ((len = read(fd, buf, sizeof(buf))) > 0) { + write(1, buf, len); + } +} +#endif /* MEVENT_ECHO */ + +static void +acceptor_callback(int fd, enum ev_type type, void *param) +{ + pthread_mutex_lock(&accept_mutex); + pthread_cond_signal(&accept_condvar); + pthread_mutex_unlock(&accept_mutex); +} + +static void * +acceptor(void *param) +{ + struct sockaddr_in sin; + pthread_t tid; + int news; + int s; + + if ((s = socket(AF_INET, SOCK_STREAM, 0)) < 0) { + perror("socket"); + exit(1); + } + + sin.sin_len = sizeof(sin); + sin.sin_family = AF_INET; + sin.sin_addr.s_addr = htonl(INADDR_ANY); + sin.sin_port = htons(TEST_PORT); + + if (bind(s, (struct sockaddr *)&sin, sizeof(sin)) < 0) { + perror("bind"); + exit(1); + } + + if (listen(s, 1) < 0) { + perror("listen"); + exit(1); + } + + (void) mevent_add(s, EVF_READ, acceptor_callback, NULL); + + pthread_mutex_lock(&accept_mutex); + + while (!pthread_cond_wait(&accept_condvar, &accept_mutex)) { + news = accept(s, NULL, NULL); + if (news < 0) { + perror("accept error"); + } else { + printf("incoming connection, spawning thread\n"); + pthread_create(&tid, NULL, echoer, + (void *)(uintptr_t)news); + } + } +} + +main() +{ + pthread_t tid; + + pthread_create(&tid, NULL, acceptor, NULL); + + mevent_dispatch(); +} diff --git a/usr.sbin/bhyve/pci_emul.c b/usr.sbin/bhyve/pci_emul.c new file mode 100644 index 0000000..273c6a2 --- /dev/null +++ b/usr.sbin/bhyve/pci_emul.c @@ -0,0 +1,976 @@ +/*- + * Copyright (c) 2011 NetApp, Inc. + * All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * 1. Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * + * THIS SOFTWARE IS PROVIDED BY NETAPP, INC ``AS IS'' AND + * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE + * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE + * ARE DISCLAIMED. IN NO EVENT SHALL NETAPP, INC OR CONTRIBUTORS BE LIABLE + * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL + * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS + * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) + * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT + * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY + * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF + * SUCH DAMAGE. + * + * $FreeBSD$ + */ + +#include <sys/cdefs.h> +__FBSDID("$FreeBSD$"); + +#include <sys/param.h> +#include <sys/linker_set.h> + +#include <ctype.h> +#include <stdio.h> +#include <stdlib.h> +#include <string.h> +#include <strings.h> +#include <assert.h> + +#include <machine/vmm.h> +#include <vmmapi.h> + +#include "fbsdrun.h" +#include "inout.h" +#include "pci_emul.h" + +#define CONF1_ADDR_PORT 0x0cf8 +#define CONF1_DATA_PORT 0x0cfc + +#define CFGWRITE(pi,off,val,b) \ +do { \ + if ((b) == 1) { \ + pci_set_cfgdata8((pi),(off),(val)); \ + } else if ((b) == 2) { \ + pci_set_cfgdata16((pi),(off),(val)); \ + } else { \ + pci_set_cfgdata32((pi),(off),(val)); \ + } \ +} while (0) + +#define MAXSLOTS 32 + +static struct slotinfo { + char *si_name; + char *si_param; + struct pci_devinst *si_devi; + int si_titled; + int si_pslot; + char si_prefix; + char si_suffix; +} pci_slotinfo[MAXSLOTS]; + +/* + * NetApp specific: + * struct used to build an in-core OEM table to supply device names + * to driver instances + */ +static struct mptable_pci_devnames { +#define MPT_HDR_BASE 0 +#define MPT_HDR_NAME 2 + uint16_t md_hdrtype; + uint16_t md_entries; + uint16_t md_cksum; + uint16_t md_pad; +#define MPT_NTAP_SIG \ + ((uint32_t)(('P' << 24) | ('A' << 16) | ('T' << 8) | 'N')) + uint32_t md_sig; + uint32_t md_rsvd; + struct mptable_pci_slotinfo { + uint16_t mds_type; + uint16_t mds_phys_slot; + uint8_t mds_bus; + uint8_t mds_slot; + uint8_t mds_func; + uint8_t mds_pad; + uint16_t mds_vid; + uint16_t mds_did; + uint8_t mds_suffix[4]; + uint8_t mds_prefix[4]; + uint32_t mds_rsvd[3]; + } md_slotinfo[MAXSLOTS]; +} pci_devnames; + +SET_DECLARE(pci_devemu_set, struct pci_devemu); + +static uint64_t pci_emul_iobase; +static uint64_t pci_emul_membase32; +static uint64_t pci_emul_membase64; + +#define PCI_EMUL_IOBASE 0x2000 +#define PCI_EMUL_IOLIMIT 0x10000 + +#define PCI_EMUL_MEMBASE32 (lomem_sz) +#define PCI_EMUL_MEMLIMIT32 0xE0000000 /* 3.5GB */ + +#define PCI_EMUL_MEMBASE64 0xD000000000UL +#define PCI_EMUL_MEMLIMIT64 0xFD00000000UL + +static int pci_emul_devices; +static int devname_elems; + +/* + * I/O access + */ + +/* + * Slot options are in the form: + * + * <slot>,<emul>[,<config>] + * + * slot is 0..31 + * emul is a string describing the type of PCI device e.g. virtio-net + * config is an optional string, depending on the device, that can be + * used for configuration. + * Examples are: + * 1,virtio-net,tap0 + * 3,dummy + */ +static void +pci_parse_slot_usage(char *aopt) +{ + printf("Invalid PCI slot info field \"%s\"\n", aopt); + free(aopt); +} + +void +pci_parse_slot(char *opt) +{ + char *slot, *emul, *config; + char *str, *cpy; + int snum; + + str = cpy = strdup(opt); + config = NULL; + + slot = strsep(&str, ","); + emul = strsep(&str, ","); + if (str != NULL) { + config = strsep(&str, ","); + } + + if (emul == NULL) { + pci_parse_slot_usage(cpy); + return; + } + + snum = 255; + snum = atoi(slot); + if (snum < 0 || snum >= MAXSLOTS) { + pci_parse_slot_usage(cpy); + } else { + pci_slotinfo[snum].si_name = emul; + pci_slotinfo[snum].si_param = config; + } +} + + +/* + * + * PCI MPTable names are of the form: + * + * <slot>,[prefix]<digit><suffix> + * + * .. with <prefix> an alphabetic char, <digit> a 1 or 2-digit string, + * and <suffix> a single char. + * + * Examples: + * 1,e0c + * 4,e0P + * 6,43a + * 7,0f + * 10,1 + * 12,e0M + * 2,12a + * + * Note that this is NetApp-specific, but is ignored on other o/s's. + */ +static void +pci_parse_name_usage(char *aopt) +{ + printf("Invalid PCI slot name field \"%s\"\n", aopt); +} + +void +pci_parse_name(char *opt) +{ + char csnum[4]; + char *namestr; + char *slotend; + char prefix, suffix; + int i; + int pslot; + int snum; + + pslot = -1; + prefix = suffix = 0; + slotend = strchr(opt, ','); + + /* + * A comma must be present, and can't be the first character + * or no slot would be present. Also, the slot number can't be + * more than 2 characters. + */ + if (slotend == NULL || slotend == opt || (slotend - opt > 2)) { + pci_parse_name_usage(opt); + return; + } + + for (i = 0; i < (slotend - opt); i++) { + csnum[i] = opt[i]; + } + csnum[i] = '\0'; + + snum = 255; + snum = atoi(csnum); + if (snum < 0 || snum >= MAXSLOTS) { + pci_parse_name_usage(opt); + return; + } + + namestr = slotend + 1; + + if (strlen(namestr) > 3) { + pci_parse_name_usage(opt); + return; + } + + if (isalpha(*namestr)) { + prefix = *namestr++; + } + + if (!isdigit(*namestr)) { + pci_parse_name_usage(opt); + } else { + pslot = *namestr++ - '0'; + if (isnumber(*namestr)) { + pslot = 10*pslot + *namestr++ - '0'; + + } + if (isalpha(*namestr) && *(namestr + 1) == 0) { + suffix = *namestr; + pci_slotinfo[snum].si_titled = 1; + pci_slotinfo[snum].si_pslot = pslot; + pci_slotinfo[snum].si_prefix = prefix; + pci_slotinfo[snum].si_suffix = suffix; + + } else { + pci_parse_name_usage(opt); + } + } +} + +static void +pci_add_mptable_name(struct slotinfo *si) +{ + struct mptable_pci_slotinfo *ms; + + /* + * If naming information has been supplied for this slot, populate + * the next available mptable OEM entry + */ + if (si->si_titled) { + ms = &pci_devnames.md_slotinfo[devname_elems]; + + ms->mds_type = MPT_HDR_NAME; + ms->mds_phys_slot = si->si_pslot; + ms->mds_bus = si->si_devi->pi_bus; + ms->mds_slot = si->si_devi->pi_slot; + ms->mds_func = si->si_devi->pi_func; + ms->mds_vid = pci_get_cfgdata16(si->si_devi, PCIR_VENDOR); + ms->mds_did = pci_get_cfgdata16(si->si_devi, PCIR_DEVICE); + ms->mds_suffix[0] = si->si_suffix; + ms->mds_prefix[0] = si->si_prefix; + + devname_elems++; + } +} + +static void +pci_finish_mptable_names(void) +{ + int size; + + if (devname_elems) { + pci_devnames.md_hdrtype = MPT_HDR_BASE; + pci_devnames.md_entries = devname_elems; + pci_devnames.md_cksum = 0; /* XXX */ + pci_devnames.md_sig = MPT_NTAP_SIG; + + size = (uintptr_t)&pci_devnames.md_slotinfo[devname_elems] - + (uintptr_t)&pci_devnames; + + fbsdrun_add_oemtbl(&pci_devnames, size); + } +} + +static int +pci_emul_handler(struct vmctx *ctx, int vcpu, int in, int port, int bytes, + uint32_t *eax, void *arg) +{ + struct pci_devinst *pdi = arg; + struct pci_devemu *pe = pdi->pi_d; + int offset, i; + + for (i = 0; i <= PCI_BARMAX; i++) { + if (pdi->pi_bar[i].type == PCIBAR_IO && + port >= pdi->pi_bar[i].addr && + port + bytes <= pdi->pi_bar[i].addr + pdi->pi_bar[i].size) { + offset = port - pdi->pi_bar[i].addr; + if (in) + *eax = (*pe->pe_ior)(pdi, i, offset, bytes); + else + (*pe->pe_iow)(pdi, i, offset, bytes, *eax); + return (0); + } + } + return (-1); +} + +static int +pci_emul_alloc_resource(uint64_t *baseptr, uint64_t limit, uint64_t size, + uint64_t *addr) +{ + uint64_t base; + + assert((size & (size - 1)) == 0); /* must be a power of 2 */ + + base = roundup2(*baseptr, size); + + if (base + size <= limit) { + *addr = base; + *baseptr = base + size; + return (0); + } else + return (-1); +} + +int +pci_emul_alloc_bar(struct pci_devinst *pdi, int idx, uint64_t hostbase, + enum pcibar_type type, uint64_t size) +{ + int i, error; + uint64_t *baseptr, limit, addr, mask, lobits, bar; + struct inout_port iop; + + assert(idx >= 0 && idx <= PCI_BARMAX); + + if ((size & (size - 1)) != 0) + size = 1UL << flsl(size); /* round up to a power of 2 */ + + switch (type) { + case PCIBAR_NONE: + baseptr = NULL; + addr = mask = lobits = 0; + break; + case PCIBAR_IO: + baseptr = &pci_emul_iobase; + limit = PCI_EMUL_IOLIMIT; + mask = PCIM_BAR_IO_BASE; + lobits = PCIM_BAR_IO_SPACE; + break; + case PCIBAR_MEM64: + /* + * XXX + * Some drivers do not work well if the 64-bit BAR is allocated + * above 4GB. Allow for this by allocating small requests under + * 4GB unless then allocation size is larger than some arbitrary + * number (32MB currently). + */ + if (size > 32 * 1024 * 1024) { + /* + * XXX special case for device requiring peer-peer DMA + */ + if (size == 0x100000000UL) + baseptr = &hostbase; + else + baseptr = &pci_emul_membase64; + limit = PCI_EMUL_MEMLIMIT64; + mask = PCIM_BAR_MEM_BASE; + lobits = PCIM_BAR_MEM_SPACE | PCIM_BAR_MEM_64 | + PCIM_BAR_MEM_PREFETCH; + break; + } + /* fallthrough */ + case PCIBAR_MEM32: + baseptr = &pci_emul_membase32; + limit = PCI_EMUL_MEMLIMIT32; + mask = PCIM_BAR_MEM_BASE; + lobits = PCIM_BAR_MEM_SPACE | PCIM_BAR_MEM_32; + break; + default: + printf("pci_emul_alloc_base: invalid bar type %d\n", type); + assert(0); + } + + if (baseptr != NULL) { + error = pci_emul_alloc_resource(baseptr, limit, size, &addr); + if (error != 0) + return (error); + } + + pdi->pi_bar[idx].type = type; + pdi->pi_bar[idx].addr = addr; + pdi->pi_bar[idx].size = size; + + /* Initialize the BAR register in config space */ + bar = (addr & mask) | lobits; + pci_set_cfgdata32(pdi, PCIR_BAR(idx), bar); + + if (type == PCIBAR_MEM64) { + assert(idx + 1 <= PCI_BARMAX); + pdi->pi_bar[idx + 1].type = PCIBAR_MEMHI64; + pci_set_cfgdata32(pdi, PCIR_BAR(idx + 1), bar >> 32); + } + + /* add a handler to intercept accesses to the I/O bar */ + if (type == PCIBAR_IO) { + iop.name = pdi->pi_name; + iop.flags = IOPORT_F_INOUT; + iop.handler = pci_emul_handler; + iop.arg = pdi; + + for (i = 0; i < size; i++) { + iop.port = addr + i; + register_inout(&iop); + } + } + + return (0); +} + +#define CAP_START_OFFSET 0x40 +static int +pci_emul_add_capability(struct pci_devinst *pi, u_char *capdata, int caplen) +{ + int i, capoff, capid, reallen; + uint16_t sts; + + static u_char endofcap[4] = { + PCIY_RESERVED, 0, 0, 0 + }; + + assert(caplen > 0 && capdata[0] != PCIY_RESERVED); + + reallen = roundup2(caplen, 4); /* dword aligned */ + + sts = pci_get_cfgdata16(pi, PCIR_STATUS); + if ((sts & PCIM_STATUS_CAPPRESENT) == 0) { + capoff = CAP_START_OFFSET; + pci_set_cfgdata8(pi, PCIR_CAP_PTR, capoff); + pci_set_cfgdata16(pi, PCIR_STATUS, sts|PCIM_STATUS_CAPPRESENT); + } else { + capoff = pci_get_cfgdata8(pi, PCIR_CAP_PTR); + while (1) { + assert((capoff & 0x3) == 0); + capid = pci_get_cfgdata8(pi, capoff); + if (capid == PCIY_RESERVED) + break; + capoff = pci_get_cfgdata8(pi, capoff + 1); + } + } + + /* Check if we have enough space */ + if (capoff + reallen + sizeof(endofcap) > PCI_REGMAX + 1) + return (-1); + + /* Copy the capability */ + for (i = 0; i < caplen; i++) + pci_set_cfgdata8(pi, capoff + i, capdata[i]); + + /* Set the next capability pointer */ + pci_set_cfgdata8(pi, capoff + 1, capoff + reallen); + + /* Copy of the reserved capability which serves as the end marker */ + for (i = 0; i < sizeof(endofcap); i++) + pci_set_cfgdata8(pi, capoff + reallen + i, endofcap[i]); + + return (0); +} + +static struct pci_devemu * +pci_emul_finddev(char *name) +{ + struct pci_devemu **pdpp, *pdp; + + SET_FOREACH(pdpp, pci_devemu_set) { + pdp = *pdpp; + if (!strcmp(pdp->pe_emu, name)) { + return (pdp); + } + } + + return (NULL); +} + +static void +pci_emul_init(struct vmctx *ctx, struct pci_devemu *pde, int slot, char *params) +{ + struct pci_devinst *pdi; + pdi = malloc(sizeof(struct pci_devinst)); + bzero(pdi, sizeof(*pdi)); + + pdi->pi_vmctx = ctx; + pdi->pi_bus = 0; + pdi->pi_slot = slot; + pdi->pi_func = 0; + pdi->pi_d = pde; + snprintf(pdi->pi_name, PI_NAMESZ, "%s-pci-%d", pde->pe_emu, slot); + + /* Disable legacy interrupts */ + pci_set_cfgdata8(pdi, PCIR_INTLINE, 255); + pci_set_cfgdata8(pdi, PCIR_INTPIN, 0); + + pci_set_cfgdata8(pdi, PCIR_COMMAND, + PCIM_CMD_PORTEN | PCIM_CMD_MEMEN | PCIM_CMD_BUSMASTEREN); + + if ((*pde->pe_init)(ctx, pdi, params) != 0) { + free(pdi); + } else { + pci_emul_devices++; + pci_slotinfo[slot].si_devi = pdi; + } +} + +void +pci_populate_msicap(struct msicap *msicap, int msgnum, int nextptr) +{ + int mmc; + + CTASSERT(sizeof(struct msicap) == 14); + + /* Number of msi messages must be a power of 2 between 1 and 32 */ + assert((msgnum & (msgnum - 1)) == 0 && msgnum >= 1 && msgnum <= 32); + mmc = ffs(msgnum) - 1; + + bzero(msicap, sizeof(struct msicap)); + msicap->capid = PCIY_MSI; + msicap->nextptr = nextptr; + msicap->msgctrl = PCIM_MSICTRL_64BIT | (mmc << 1); +} + +int +pci_emul_add_msicap(struct pci_devinst *pi, int msgnum) +{ + struct msicap msicap; + + pci_populate_msicap(&msicap, msgnum, 0); + + return (pci_emul_add_capability(pi, (u_char *)&msicap, sizeof(msicap))); +} + +void +msicap_cfgwrite(struct pci_devinst *pi, int capoff, int offset, + int bytes, uint32_t val) +{ + uint16_t msgctrl, rwmask, msgdata, mme; + uint32_t addrlo; + + /* + * If guest is writing to the message control register make sure + * we do not overwrite read-only fields. + */ + if ((offset - capoff) == 2 && bytes == 2) { + rwmask = PCIM_MSICTRL_MME_MASK | PCIM_MSICTRL_MSI_ENABLE; + msgctrl = pci_get_cfgdata16(pi, offset); + msgctrl &= ~rwmask; + msgctrl |= val & rwmask; + val = msgctrl; + + addrlo = pci_get_cfgdata32(pi, capoff + 4); + if (msgctrl & PCIM_MSICTRL_64BIT) + msgdata = pci_get_cfgdata16(pi, capoff + 12); + else + msgdata = pci_get_cfgdata16(pi, capoff + 8); + + /* + * XXX check delivery mode, destination mode etc + */ + mme = msgctrl & PCIM_MSICTRL_MME_MASK; + pi->pi_msi.enabled = msgctrl & PCIM_MSICTRL_MSI_ENABLE ? 1 : 0; + if (pi->pi_msi.enabled) { + pi->pi_msi.cpu = (addrlo >> 12) & 0xff; + pi->pi_msi.vector = msgdata & 0xff; + pi->pi_msi.msgnum = 1 << (mme >> 4); + } else { + pi->pi_msi.cpu = 0; + pi->pi_msi.vector = 0; + pi->pi_msi.msgnum = 0; + } + } + + CFGWRITE(pi, offset, val, bytes); +} + +/* + * This function assumes that 'coff' is in the capabilities region of the + * config space. + */ +static void +pci_emul_capwrite(struct pci_devinst *pi, int offset, int bytes, uint32_t val) +{ + int capid; + uint8_t capoff, nextoff; + + /* Do not allow un-aligned writes */ + if ((offset & (bytes - 1)) != 0) + return; + + /* Find the capability that we want to update */ + capoff = CAP_START_OFFSET; + while (1) { + capid = pci_get_cfgdata8(pi, capoff); + if (capid == PCIY_RESERVED) + break; + + nextoff = pci_get_cfgdata8(pi, capoff + 1); + if (offset >= capoff && offset < nextoff) + break; + + capoff = nextoff; + } + assert(offset >= capoff); + + /* + * Capability ID and Next Capability Pointer are readonly + */ + if (offset == capoff || offset == capoff + 1) + return; + + switch (capid) { + case PCIY_MSI: + msicap_cfgwrite(pi, capoff, offset, bytes, val); + break; + default: + break; + } +} + +static int +pci_emul_iscap(struct pci_devinst *pi, int offset) +{ + int found; + uint16_t sts; + uint8_t capid, lastoff; + + found = 0; + sts = pci_get_cfgdata16(pi, PCIR_STATUS); + if ((sts & PCIM_STATUS_CAPPRESENT) != 0) { + lastoff = pci_get_cfgdata8(pi, PCIR_CAP_PTR); + while (1) { + assert((lastoff & 0x3) == 0); + capid = pci_get_cfgdata8(pi, lastoff); + if (capid == PCIY_RESERVED) + break; + lastoff = pci_get_cfgdata8(pi, lastoff + 1); + } + if (offset >= CAP_START_OFFSET && offset <= lastoff) + found = 1; + } + return (found); +} + +void +init_pci(struct vmctx *ctx) +{ + struct pci_devemu *pde; + struct slotinfo *si; + int i; + + pci_emul_iobase = PCI_EMUL_IOBASE; + pci_emul_membase32 = PCI_EMUL_MEMBASE32; + pci_emul_membase64 = PCI_EMUL_MEMBASE64; + + si = pci_slotinfo; + + for (i = 0; i < MAXSLOTS; i++, si++) { + if (si->si_name != NULL) { + pde = pci_emul_finddev(si->si_name); + if (pde != NULL) { + pci_emul_init(ctx, pde, i, si->si_param); + pci_add_mptable_name(si); + } + } + } + pci_finish_mptable_names(); +} + +int +pci_msi_enabled(struct pci_devinst *pi) +{ + return (pi->pi_msi.enabled); +} + +int +pci_msi_msgnum(struct pci_devinst *pi) +{ + if (pi->pi_msi.enabled) + return (pi->pi_msi.msgnum); + else + return (0); +} + +void +pci_generate_msi(struct pci_devinst *pi, int msg) +{ + + if (pci_msi_enabled(pi) && msg < pci_msi_msgnum(pi)) { + vm_lapic_irq(pi->pi_vmctx, + pi->pi_msi.cpu, + pi->pi_msi.vector + msg); + } +} + +static int cfgbus, cfgslot, cfgfunc, cfgoff; + +static int +pci_emul_cfgaddr(struct vmctx *ctx, int vcpu, int in, int port, int bytes, + uint32_t *eax, void *arg) +{ + uint32_t x; + + assert(!in); + + if (bytes != 4) + return (-1); + + x = *eax; + cfgoff = x & PCI_REGMAX; + cfgfunc = (x >> 8) & PCI_FUNCMAX; + cfgslot = (x >> 11) & PCI_SLOTMAX; + cfgbus = (x >> 16) & PCI_BUSMAX; + + return (0); +} +INOUT_PORT(pci_cfgaddr, CONF1_ADDR_PORT, IOPORT_F_OUT, pci_emul_cfgaddr); + +static int +pci_emul_cfgdata(struct vmctx *ctx, int vcpu, int in, int port, int bytes, + uint32_t *eax, void *arg) +{ + struct pci_devinst *pi; + struct pci_devemu *pe; + int coff, idx; + uint64_t mask, bar; + + assert(bytes == 1 || bytes == 2 || bytes == 4); + + pi = pci_slotinfo[cfgslot].si_devi; + coff = cfgoff + (port - CONF1_DATA_PORT); + +#if 0 + printf("pcicfg-%s from 0x%0x of %d bytes (%d/%d/%d)\n\r", + in ? "read" : "write", coff, bytes, cfgbus, cfgslot, cfgfunc); +#endif + + if (pi == NULL || cfgfunc != 0) { + if (in) + *eax = 0xffffffff; + return (0); + } + + pe = pi->pi_d; + + /* + * Config read + */ + if (in) { + /* Let the device emulation override the default handler */ + if (pe->pe_cfgread != NULL && + (*pe->pe_cfgread)(ctx, vcpu, pi, coff, bytes, eax) == 0) + return (0); + + if (bytes == 1) + *eax = pci_get_cfgdata8(pi, coff); + else if (bytes == 2) + *eax = pci_get_cfgdata16(pi, coff); + else + *eax = pci_get_cfgdata32(pi, coff); + } else { + /* Let the device emulation override the default handler */ + if (pe->pe_cfgwrite != NULL && + (*pe->pe_cfgwrite)(ctx, vcpu, pi, coff, bytes, *eax) == 0) + return (0); + + /* + * Special handling for write to BAR registers + */ + if (coff >= PCIR_BAR(0) && coff < PCIR_BAR(PCI_BARMAX + 1)) { + /* + * Ignore writes to BAR registers that are not + * 4-byte aligned. + */ + if (bytes != 4 || (coff & 0x3) != 0) + return (0); + idx = (coff - PCIR_BAR(0)) / 4; + switch (pi->pi_bar[idx].type) { + case PCIBAR_NONE: + bar = 0; + break; + case PCIBAR_IO: + mask = ~(pi->pi_bar[idx].size - 1); + mask &= PCIM_BAR_IO_BASE; + bar = (*eax & mask) | PCIM_BAR_IO_SPACE; + break; + case PCIBAR_MEM32: + mask = ~(pi->pi_bar[idx].size - 1); + mask &= PCIM_BAR_MEM_BASE; + bar = *eax & mask; + bar |= PCIM_BAR_MEM_SPACE | PCIM_BAR_MEM_32; + break; + case PCIBAR_MEM64: + mask = ~(pi->pi_bar[idx].size - 1); + mask &= PCIM_BAR_MEM_BASE; + bar = *eax & mask; + bar |= PCIM_BAR_MEM_SPACE | PCIM_BAR_MEM_64 | + PCIM_BAR_MEM_PREFETCH; + break; + case PCIBAR_MEMHI64: + mask = ~(pi->pi_bar[idx - 1].size - 1); + mask &= PCIM_BAR_MEM_BASE; + bar = ((uint64_t)*eax << 32) & mask; + bar = bar >> 32; + break; + default: + assert(0); + } + pci_set_cfgdata32(pi, coff, bar); + } else if (pci_emul_iscap(pi, coff)) { + pci_emul_capwrite(pi, coff, bytes, *eax); + } else { + CFGWRITE(pi, coff, *eax, bytes); + } + } + + return (0); +} + +INOUT_PORT(pci_cfgdata, CONF1_DATA_PORT+0, IOPORT_F_INOUT, pci_emul_cfgdata); +INOUT_PORT(pci_cfgdata, CONF1_DATA_PORT+1, IOPORT_F_INOUT, pci_emul_cfgdata); +INOUT_PORT(pci_cfgdata, CONF1_DATA_PORT+2, IOPORT_F_INOUT, pci_emul_cfgdata); +INOUT_PORT(pci_cfgdata, CONF1_DATA_PORT+3, IOPORT_F_INOUT, pci_emul_cfgdata); + +/* + * I/O ports to configure PCI IRQ routing. We ignore all writes to it. + */ +static int +pci_irq_port_handler(struct vmctx *ctx, int vcpu, int in, int port, int bytes, + uint32_t *eax, void *arg) +{ + assert(in == 0); + return (0); +} +INOUT_PORT(pci_irq, 0xC00, IOPORT_F_OUT, pci_irq_port_handler); +INOUT_PORT(pci_irq, 0xC01, IOPORT_F_OUT, pci_irq_port_handler); + +#define PCI_EMUL_TEST +#ifdef PCI_EMUL_TEST +/* + * Define a dummy test device + */ +#define DREGSZ 20 +struct pci_emul_dsoftc { + uint8_t regs[DREGSZ]; +}; + +#define PCI_EMUL_MSGS 4 + +int +pci_emul_dinit(struct vmctx *ctx, struct pci_devinst *pi, char *opts) +{ + int error; + struct pci_emul_dsoftc *sc; + + sc = malloc(sizeof(struct pci_emul_dsoftc)); + memset(sc, 0, sizeof(struct pci_emul_dsoftc)); + + pi->pi_arg = sc; + + pci_set_cfgdata16(pi, PCIR_DEVICE, 0x0001); + pci_set_cfgdata16(pi, PCIR_VENDOR, 0x10DD); + pci_set_cfgdata8(pi, PCIR_CLASS, 0x02); + + error = pci_emul_alloc_bar(pi, 0, 0, PCIBAR_IO, DREGSZ); + assert(error == 0); + + error = pci_emul_add_msicap(pi, PCI_EMUL_MSGS); + assert(error == 0); + + return (0); +} + +void +pci_emul_diow(struct pci_devinst *pi, int baridx, int offset, int size, + uint32_t value) +{ + int i; + struct pci_emul_dsoftc *sc = pi->pi_arg; + + if (offset + size > DREGSZ) { + printf("diow: too large, offset %d size %d\n", offset, size); + return; + } + + if (size == 1) { + sc->regs[offset] = value & 0xff; + } else if (size == 2) { + *(uint16_t *)&sc->regs[offset] = value & 0xffff; + } else { + *(uint32_t *)&sc->regs[offset] = value; + } + + /* + * Special magic value to generate an interrupt + */ + if (offset == 4 && size == 4 && pci_msi_enabled(pi)) + pci_generate_msi(pi, value % pci_msi_msgnum(pi)); + + if (value == 0xabcdef) { + for (i = 0; i < pci_msi_msgnum(pi); i++) + pci_generate_msi(pi, i); + } +} + +uint32_t +pci_emul_dior(struct pci_devinst *pi, int baridx, int offset, int size) +{ + struct pci_emul_dsoftc *sc = pi->pi_arg; + uint32_t value; + + if (offset + size > DREGSZ) { + printf("dior: too large, offset %d size %d\n", offset, size); + return (0); + } + + if (size == 1) { + value = sc->regs[offset]; + } else if (size == 2) { + value = *(uint16_t *) &sc->regs[offset]; + } else { + value = *(uint32_t *) &sc->regs[offset]; + } + + return (value); +} + +struct pci_devemu pci_dummy = { + .pe_emu = "dummy", + .pe_init = pci_emul_dinit, + .pe_iow = pci_emul_diow, + .pe_ior = pci_emul_dior +}; +PCI_EMUL_SET(pci_dummy); + +#endif /* PCI_EMUL_TEST */ diff --git a/usr.sbin/bhyve/pci_emul.h b/usr.sbin/bhyve/pci_emul.h new file mode 100644 index 0000000..f5f8e22 --- /dev/null +++ b/usr.sbin/bhyve/pci_emul.h @@ -0,0 +1,171 @@ +/*- + * Copyright (c) 2011 NetApp, Inc. + * All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * 1. Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * + * THIS SOFTWARE IS PROVIDED BY NETAPP, INC ``AS IS'' AND + * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE + * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE + * ARE DISCLAIMED. IN NO EVENT SHALL NETAPP, INC OR CONTRIBUTORS BE LIABLE + * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL + * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS + * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) + * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT + * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY + * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF + * SUCH DAMAGE. + * + * $FreeBSD$ + */ + +#ifndef _PCI_EMUL_H_ +#define _PCI_EMUL_H_ + +#include <sys/types.h> +#include <sys/queue.h> +#include <sys/kernel.h> + +#include <dev/pci/pcireg.h> + +#include <assert.h> + +#define PCI_BARMAX PCIR_MAX_BAR_0 /* BAR registers in a Type 0 header */ +#define PCIY_RESERVED 0x00 + +struct vmctx; +struct pci_devinst; + +struct pci_devemu { + char *pe_emu; /* Name of device emulation */ + + /* instance creation */ + int (*pe_init)(struct vmctx *, struct pci_devinst *, char *opts); + + /* config space read/write callbacks */ + int (*pe_cfgwrite)(struct vmctx *ctx, int vcpu, + struct pci_devinst *pi, int offset, + int bytes, uint32_t val); + int (*pe_cfgread)(struct vmctx *ctx, int vcpu, + struct pci_devinst *pi, int offset, + int bytes, uint32_t *retval); + + /* I/O space read/write callbacks */ + void (*pe_iow)(struct pci_devinst *pi, int baridx, + int offset, int size, uint32_t value); + uint32_t (*pe_ior)(struct pci_devinst *pi, int baridx, + int offset, int size); +}; +#define PCI_EMUL_SET(x) DATA_SET(pci_devemu_set, x); + +enum pcibar_type { + PCIBAR_NONE, + PCIBAR_IO, + PCIBAR_MEM32, + PCIBAR_MEM64, + PCIBAR_MEMHI64 +}; + +struct pcibar { + enum pcibar_type type; /* io or memory */ + uint64_t size; + uint64_t addr; +}; + +#define PI_NAMESZ 40 + +struct pci_devinst { + struct pci_devemu *pi_d; + struct vmctx *pi_vmctx; + uint8_t pi_bus, pi_slot, pi_func; + char pi_name[PI_NAMESZ]; + uint16_t pi_iobase; + int pi_bar_getsize; + + struct { + int enabled; + int cpu; + int vector; + int msgnum; + } pi_msi; + + void *pi_arg; /* devemu-private data */ + + u_char pi_cfgdata[PCI_REGMAX + 1]; + struct pcibar pi_bar[PCI_BARMAX + 1]; +}; + +struct msicap { + uint8_t capid; + uint8_t nextptr; + uint16_t msgctrl; + uint32_t addrlo; + uint32_t addrhi; + uint16_t msgdata; +} __packed; + +void init_pci(struct vmctx *ctx); +void pci_parse_slot(char *opt); +void pci_parse_name(char *opt); +void pci_callback(void); +int pci_emul_alloc_bar(struct pci_devinst *pdi, int idx, uint64_t hostbase, + enum pcibar_type type, uint64_t size); +int pci_emul_add_msicap(struct pci_devinst *pi, int msgnum); +void msicap_cfgwrite(struct pci_devinst *pi, int capoff, int offset, + int bytes, uint32_t val); + +void pci_generate_msi(struct pci_devinst *pi, int msgnum); +int pci_msi_enabled(struct pci_devinst *pi); +int pci_msi_msgnum(struct pci_devinst *pi); +void pci_populate_msicap(struct msicap *cap, int msgs, int nextptr); + +static __inline void +pci_set_cfgdata8(struct pci_devinst *pi, int offset, uint8_t val) +{ + assert(offset <= PCI_REGMAX); + *(uint8_t *)(pi->pi_cfgdata + offset) = val; +} + +static __inline void +pci_set_cfgdata16(struct pci_devinst *pi, int offset, uint16_t val) +{ + assert(offset <= (PCI_REGMAX - 1) && (offset & 1) == 0); + *(uint16_t *)(pi->pi_cfgdata + offset) = val; +} + +static __inline void +pci_set_cfgdata32(struct pci_devinst *pi, int offset, uint32_t val) +{ + assert(offset <= (PCI_REGMAX - 3) && (offset & 3) == 0); + *(uint32_t *)(pi->pi_cfgdata + offset) = val; +} + +static __inline uint8_t +pci_get_cfgdata8(struct pci_devinst *pi, int offset) +{ + assert(offset <= PCI_REGMAX); + return (*(uint8_t *)(pi->pi_cfgdata + offset)); +} + +static __inline uint16_t +pci_get_cfgdata16(struct pci_devinst *pi, int offset) +{ + assert(offset <= (PCI_REGMAX - 1) && (offset & 1) == 0); + return (*(uint16_t *)(pi->pi_cfgdata + offset)); +} + +static __inline uint32_t +pci_get_cfgdata32(struct pci_devinst *pi, int offset) +{ + assert(offset <= (PCI_REGMAX - 3) && (offset & 3) == 0); + return (*(uint32_t *)(pi->pi_cfgdata + offset)); +} + +#endif /* _PCI_EMUL_H_ */ diff --git a/usr.sbin/bhyve/pci_hostbridge.c b/usr.sbin/bhyve/pci_hostbridge.c new file mode 100644 index 0000000..c77762d --- /dev/null +++ b/usr.sbin/bhyve/pci_hostbridge.c @@ -0,0 +1,52 @@ +/*- + * Copyright (c) 2011 NetApp, Inc. + * All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * 1. Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * + * THIS SOFTWARE IS PROVIDED BY NETAPP, INC ``AS IS'' AND + * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE + * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE + * ARE DISCLAIMED. IN NO EVENT SHALL NETAPP, INC OR CONTRIBUTORS BE LIABLE + * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL + * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS + * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) + * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT + * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY + * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF + * SUCH DAMAGE. + * + * $FreeBSD$ + */ + +#include <sys/cdefs.h> +__FBSDID("$FreeBSD$"); + +#include "pci_emul.h" + +static int +pci_hostbridge_init(struct vmctx *ctx, struct pci_devinst *pi, char *opts) +{ + + /* config space */ + pci_set_cfgdata16(pi, PCIR_VENDOR, 0x1275); /* NetApp */ + pci_set_cfgdata16(pi, PCIR_DEVICE, 0x1275); /* NetApp */ + pci_set_cfgdata8(pi, PCIR_HDRTYPE, PCIM_HDRTYPE_BRIDGE); + pci_set_cfgdata8(pi, PCIR_CLASS, PCIC_BRIDGE); + pci_set_cfgdata8(pi, PCIR_SUBCLASS, PCIS_BRIDGE_HOST); + + return (0); +} + +struct pci_devemu pci_de_hostbridge = { + .pe_emu = "hostbridge", + .pe_init = pci_hostbridge_init, +}; +PCI_EMUL_SET(pci_de_hostbridge); diff --git a/usr.sbin/bhyve/pci_passthru.c b/usr.sbin/bhyve/pci_passthru.c new file mode 100644 index 0000000..1c417fd --- /dev/null +++ b/usr.sbin/bhyve/pci_passthru.c @@ -0,0 +1,508 @@ +/*- + * Copyright (c) 2011 NetApp, Inc. + * All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * 1. Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * + * THIS SOFTWARE IS PROVIDED BY NETAPP, INC ``AS IS'' AND + * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE + * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE + * ARE DISCLAIMED. IN NO EVENT SHALL NETAPP, INC OR CONTRIBUTORS BE LIABLE + * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL + * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS + * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) + * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT + * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY + * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF + * SUCH DAMAGE. + * + * $FreeBSD$ + */ + +#include <sys/cdefs.h> +__FBSDID("$FreeBSD$"); + +#include <sys/param.h> +#include <sys/types.h> +#include <sys/pciio.h> +#include <sys/ioctl.h> + +#include <dev/io/iodev.h> +#include <machine/iodev.h> + +#include <stdio.h> +#include <stdlib.h> +#include <string.h> +#include <errno.h> +#include <fcntl.h> +#include <unistd.h> + +#include <machine/vmm.h> +#include <vmmapi.h> +#include "pci_emul.h" + +#ifndef _PATH_DEVPCI +#define _PATH_DEVPCI "/dev/pci" +#endif + +#ifndef _PATH_DEVIO +#define _PATH_DEVIO "/dev/io" +#endif + +#define LEGACY_SUPPORT 1 + +static int pcifd = -1; +static int iofd = -1; + +struct passthru_softc { + struct pci_devinst *psc_pi; + struct pcibar psc_bar[PCI_BARMAX + 1]; + struct { + int capoff; + int msgctrl; + int emulated; + } psc_msi; + struct pcisel psc_sel; +}; + +static int +msi_caplen(int msgctrl) +{ + int len; + + len = 10; /* minimum length of msi capability */ + + if (msgctrl & PCIM_MSICTRL_64BIT) + len += 4; + +#if 0 + /* + * Ignore the 'mask' and 'pending' bits in the MSI capability. + * We'll let the guest manipulate them directly. + */ + if (msgctrl & PCIM_MSICTRL_VECTOR) + len += 10; +#endif + + return (len); +} + +static uint32_t +read_config(const struct pcisel *sel, long reg, int width) +{ + struct pci_io pi; + + bzero(&pi, sizeof(pi)); + pi.pi_sel = *sel; + pi.pi_reg = reg; + pi.pi_width = width; + + if (ioctl(pcifd, PCIOCREAD, &pi) < 0) + return (0); /* XXX */ + else + return (pi.pi_data); +} + +static void +write_config(const struct pcisel *sel, long reg, int width, uint32_t data) +{ + struct pci_io pi; + + bzero(&pi, sizeof(pi)); + pi.pi_sel = *sel; + pi.pi_reg = reg; + pi.pi_width = width; + pi.pi_data = data; + + (void)ioctl(pcifd, PCIOCWRITE, &pi); /* XXX */ +} + +#ifdef LEGACY_SUPPORT +static int +passthru_add_msicap(struct pci_devinst *pi, int msgnum, int nextptr) +{ + int capoff, i; + struct msicap msicap; + u_char *capdata; + + pci_populate_msicap(&msicap, msgnum, nextptr); + + /* + * XXX + * Copy the msi capability structure in the last 16 bytes of the + * config space. This is wrong because it could shadow something + * useful to the device. + */ + capoff = 256 - roundup(sizeof(msicap), 4); + capdata = (u_char *)&msicap; + for (i = 0; i < sizeof(msicap); i++) + pci_set_cfgdata8(pi, capoff + i, capdata[i]); + + return (capoff); +} +#endif /* LEGACY_SUPPORT */ + +static int +cfginitmsi(struct passthru_softc *sc) +{ + int ptr, cap, sts, caplen; + uint32_t u32; + struct pcisel sel; + struct pci_devinst *pi; + + pi = sc->psc_pi; + sel = sc->psc_sel; + + /* + * Parse the capabilities and cache the location of the MSI + * capability. + */ + sts = read_config(&sel, PCIR_STATUS, 2); + if (sts & PCIM_STATUS_CAPPRESENT) { + ptr = read_config(&sel, PCIR_CAP_PTR, 1); + while (ptr != 0 && ptr != 0xff) { + cap = read_config(&sel, ptr + PCICAP_ID, 1); + if (cap == PCIY_MSI) { + /* + * Copy the MSI capability into the config + * space of the emulated pci device + */ + sc->psc_msi.capoff = ptr; + sc->psc_msi.msgctrl = read_config(&sel, + ptr + 2, 2); + sc->psc_msi.emulated = 0; + caplen = msi_caplen(sc->psc_msi.msgctrl); + while (caplen > 0) { + u32 = read_config(&sel, ptr, 4); + pci_set_cfgdata32(pi, ptr, u32); + caplen -= 4; + ptr += 4; + } + break; + } + ptr = read_config(&sel, ptr + PCICAP_NEXTPTR, 1); + } + } + +#ifdef LEGACY_SUPPORT + /* + * If the passthrough device does not support MSI then craft a + * MSI capability for it. We link the new MSI capability at the + * head of the list of capabilities. + */ + if ((sts & PCIM_STATUS_CAPPRESENT) != 0 && sc->psc_msi.capoff == 0) { + int origptr, msiptr; + origptr = read_config(&sel, PCIR_CAP_PTR, 1); + msiptr = passthru_add_msicap(pi, 1, origptr); + sc->psc_msi.capoff = msiptr; + sc->psc_msi.msgctrl = pci_get_cfgdata16(pi, msiptr + 2); + sc->psc_msi.emulated = 1; + pci_set_cfgdata8(pi, PCIR_CAP_PTR, msiptr); + } +#endif + + if (sc->psc_msi.capoff == 0) /* MSI or bust */ + return (-1); + else + return (0); +} + +static int +cfginitbar(struct vmctx *ctx, struct passthru_softc *sc) +{ + int i, error; + struct pci_devinst *pi; + struct pci_bar_io bar; + enum pcibar_type bartype; + uint64_t base; + + pi = sc->psc_pi; + + /* + * Initialize BAR registers + */ + for (i = 0; i <= PCI_BARMAX; i++) { + bzero(&bar, sizeof(bar)); + bar.pbi_sel = sc->psc_sel; + bar.pbi_reg = PCIR_BAR(i); + + if (ioctl(pcifd, PCIOCGETBAR, &bar) < 0) + continue; + + if (PCI_BAR_IO(bar.pbi_base)) { + bartype = PCIBAR_IO; + base = bar.pbi_base & PCIM_BAR_IO_BASE; + } else { + switch (bar.pbi_base & PCIM_BAR_MEM_TYPE) { + case PCIM_BAR_MEM_64: + bartype = PCIBAR_MEM64; + break; + default: + bartype = PCIBAR_MEM32; + break; + } + base = bar.pbi_base & PCIM_BAR_MEM_BASE; + } + + /* Cache information about the "real" BAR */ + sc->psc_bar[i].type = bartype; + sc->psc_bar[i].size = bar.pbi_length; + sc->psc_bar[i].addr = base; + + /* Allocate the BAR in the guest I/O or MMIO space */ + error = pci_emul_alloc_bar(pi, i, base, bartype, + bar.pbi_length); + if (error) + return (-1); + + /* + * Map the physical MMIO space in the guest MMIO space + */ + if (bartype != PCIBAR_IO) { + error = vm_map_pptdev_mmio(ctx, sc->psc_sel.pc_bus, + sc->psc_sel.pc_dev, sc->psc_sel.pc_func, + pi->pi_bar[i].addr, pi->pi_bar[i].size, base); + if (error) + return (-1); + } + + /* + * 64-bit BAR takes up two slots so skip the next one. + */ + if (bartype == PCIBAR_MEM64) { + i++; + assert(i <= PCI_BARMAX); + sc->psc_bar[i].type = PCIBAR_MEMHI64; + } + } + return (0); +} + +static int +cfginit(struct vmctx *ctx, struct pci_devinst *pi, int bus, int slot, int func) +{ + int error; + struct passthru_softc *sc; + + error = 1; + sc = pi->pi_arg; + + bzero(&sc->psc_sel, sizeof(struct pcisel)); + sc->psc_sel.pc_bus = bus; + sc->psc_sel.pc_dev = slot; + sc->psc_sel.pc_func = func; + + if (cfginitbar(ctx, sc) != 0) + goto done; + + if (cfginitmsi(sc) != 0) + goto done; + + error = 0; /* success */ +done: + return (error); +} + +static int +passthru_init(struct vmctx *ctx, struct pci_devinst *pi, char *opts) +{ + int bus, slot, func, error; + struct passthru_softc *sc; + + sc = NULL; + error = 1; + + if (pcifd < 0) { + pcifd = open(_PATH_DEVPCI, O_RDWR, 0); + if (pcifd < 0) + goto done; + } + + if (iofd < 0) { + iofd = open(_PATH_DEVIO, O_RDWR, 0); + if (iofd < 0) + goto done; + } + + if (opts == NULL || sscanf(opts, "%d/%d/%d", &bus, &slot, &func) != 3) + goto done; + + if (vm_assign_pptdev(ctx, bus, slot, func) != 0) + goto done; + + sc = malloc(sizeof(struct passthru_softc)); + memset(sc, 0, sizeof(struct passthru_softc)); + + pi->pi_arg = sc; + sc->psc_pi = pi; + + /* initialize config space */ + if (cfginit(ctx, pi, bus, slot, func) != 0) + goto done; + + error = 0; /* success */ +done: + if (error) { + free(sc); + vm_unassign_pptdev(ctx, bus, slot, func); + } + return (error); +} + +static int +bar_access(int coff) +{ + if (coff >= PCIR_BAR(0) && coff < PCIR_BAR(PCI_BARMAX + 1)) + return (1); + else + return (0); +} + +static int +msicap_access(struct passthru_softc *sc, int coff) +{ + int caplen; + + if (sc->psc_msi.capoff == 0) + return (0); + + caplen = msi_caplen(sc->psc_msi.msgctrl); + + if (coff >= sc->psc_msi.capoff && coff < sc->psc_msi.capoff + caplen) + return (1); + else + return (0); +} + +static int +passthru_cfgread(struct vmctx *ctx, int vcpu, struct pci_devinst *pi, int coff, + int bytes, uint32_t *rv) +{ + struct passthru_softc *sc; + + sc = pi->pi_arg; + + /* + * PCI BARs and MSI capability is emulated. + */ + if (bar_access(coff) || msicap_access(sc, coff)) + return (-1); + +#ifdef LEGACY_SUPPORT + /* + * Emulate PCIR_CAP_PTR if this device does not support MSI capability + * natively. + */ + if (sc->psc_msi.emulated) { + if (coff >= PCIR_CAP_PTR && coff < PCIR_CAP_PTR + 4) + return (-1); + } +#endif + + /* Everything else just read from the device's config space */ + *rv = read_config(&sc->psc_sel, coff, bytes); + + return (0); +} + +static int +passthru_cfgwrite(struct vmctx *ctx, int vcpu, struct pci_devinst *pi, int coff, + int bytes, uint32_t val) +{ + int error; + struct passthru_softc *sc; + + sc = pi->pi_arg; + + /* + * PCI BARs are emulated + */ + if (bar_access(coff)) + return (-1); + + /* + * MSI capability is emulated + */ + if (msicap_access(sc, coff)) { + msicap_cfgwrite(pi, sc->psc_msi.capoff, coff, bytes, val); + + error = vm_setup_msi(ctx, vcpu, sc->psc_sel.pc_bus, + sc->psc_sel.pc_dev, sc->psc_sel.pc_func, pi->pi_msi.cpu, + pi->pi_msi.vector, pi->pi_msi.msgnum); + if (error != 0) { + printf("vm_setup_msi returned error %d\r\n", errno); + exit(1); + } + return (0); + } + +#ifdef LEGACY_SUPPORT + /* + * If this device does not support MSI natively then we cannot let + * the guest disable legacy interrupts from the device. It is the + * legacy interrupt that is triggering the virtual MSI to the guest. + */ + if (sc->psc_msi.emulated && pci_msi_enabled(pi)) { + if (coff == PCIR_COMMAND && bytes == 2) + val &= ~PCIM_CMD_INTxDIS; + } +#endif + + write_config(&sc->psc_sel, coff, bytes, val); + + return (0); +} + +static void +passthru_iow(struct pci_devinst *pi, int baridx, int offset, int size, + uint32_t value) +{ + struct passthru_softc *sc; + struct iodev_pio_req pio; + + sc = pi->pi_arg; + + bzero(&pio, sizeof(struct iodev_pio_req)); + pio.access = IODEV_PIO_WRITE; + pio.port = sc->psc_bar[baridx].addr + offset; + pio.width = size; + pio.val = value; + + (void)ioctl(iofd, IODEV_PIO, &pio); +} + +static uint32_t +passthru_ior(struct pci_devinst *pi, int baridx, int offset, int size) +{ + struct passthru_softc *sc; + struct iodev_pio_req pio; + + sc = pi->pi_arg; + + bzero(&pio, sizeof(struct iodev_pio_req)); + pio.access = IODEV_PIO_READ; + pio.port = sc->psc_bar[baridx].addr + offset; + pio.width = size; + pio.val = 0; + + (void)ioctl(iofd, IODEV_PIO, &pio); + + return (pio.val); +} + +struct pci_devemu passthru = { + .pe_emu = "passthru", + .pe_init = passthru_init, + .pe_cfgwrite = passthru_cfgwrite, + .pe_cfgread = passthru_cfgread, + .pe_iow = passthru_iow, + .pe_ior = passthru_ior, +}; +PCI_EMUL_SET(passthru); diff --git a/usr.sbin/bhyve/pci_virtio_block.c b/usr.sbin/bhyve/pci_virtio_block.c new file mode 100644 index 0000000..b86e21d --- /dev/null +++ b/usr.sbin/bhyve/pci_virtio_block.c @@ -0,0 +1,502 @@ +/*- + * Copyright (c) 2011 NetApp, Inc. + * All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * 1. Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * + * THIS SOFTWARE IS PROVIDED BY NETAPP, INC ``AS IS'' AND + * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE + * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE + * ARE DISCLAIMED. IN NO EVENT SHALL NETAPP, INC OR CONTRIBUTORS BE LIABLE + * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL + * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS + * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) + * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT + * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY + * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF + * SUCH DAMAGE. + * + * $FreeBSD$ + */ + +#include <sys/cdefs.h> +__FBSDID("$FreeBSD$"); + +#include <sys/param.h> +#include <sys/linker_set.h> +#include <sys/stat.h> +#include <sys/uio.h> +#include <sys/ioctl.h> + +#include <errno.h> +#include <fcntl.h> +#include <stdio.h> +#include <stdlib.h> +#include <stdint.h> +#include <string.h> +#include <strings.h> +#include <unistd.h> +#include <assert.h> +#include <pthread.h> + +#include "fbsdrun.h" +#include "pci_emul.h" +#include "virtio.h" + +#define VTBLK_RINGSZ 64 + +#define VTBLK_CFGSZ 28 + +#define VTBLK_R_CFG VTCFG_R_CFG0 +#define VTBLK_R_CFG_END VTBLK_R_CFG + VTBLK_CFGSZ -1 +#define VTBLK_R_MAX VTBLK_R_CFG_END + +#define VTBLK_REGSZ VTBLK_R_MAX+1 + +#define VTBLK_MAXSEGS 32 + +#define VTBLK_S_OK 0 +#define VTBLK_S_IOERR 1 + +/* + * Host capabilities + */ +#define VTBLK_S_HOSTCAPS \ + ( 0x00000004 | /* host maximum request segments */ \ + 0x10000000 ) /* supports indirect descriptors */ + +struct vring_hqueue { + /* Internal state */ + uint16_t hq_size; + uint16_t hq_cur_aidx; /* trails behind 'avail_idx' */ + + /* Host-context pointers to the queue */ + struct virtio_desc *hq_dtable; + uint16_t *hq_avail_flags; + uint16_t *hq_avail_idx; /* monotonically increasing */ + uint16_t *hq_avail_ring; + + uint16_t *hq_used_flags; + uint16_t *hq_used_idx; /* monotonically increasing */ + struct virtio_used *hq_used_ring; +}; + +/* + * Config space + */ +struct vtblk_config { + uint64_t vbc_capacity; + uint32_t vbc_size_max; + uint32_t vbc_seg_max; + uint16_t vbc_geom_c; + uint8_t vbc_geom_h; + uint8_t vbc_geom_s; + uint32_t vbc_blk_size; + uint32_t vbc_sectors_max; +} __packed; +CTASSERT(sizeof(struct vtblk_config) == VTBLK_CFGSZ); + +/* + * Fixed-size block header + */ +struct virtio_blk_hdr { +#define VBH_OP_READ 0 +#define VBH_OP_WRITE 1 + uint32_t vbh_type; + uint32_t vbh_ioprio; + uint64_t vbh_sector; +} __packed; + +/* + * Debug printf + */ +static int pci_vtblk_debug; +#define DPRINTF(params) if (pci_vtblk_debug) printf params +#define WPRINTF(params) printf params + +/* + * Per-device softc + */ +struct pci_vtblk_softc { + struct pci_devinst *vbsc_pi; + int vbsc_fd; + int vbsc_status; + int vbsc_isr; + int vbsc_lastq; + uint32_t vbsc_features; + uint64_t vbsc_pfn; + struct vring_hqueue vbsc_q; + struct vtblk_config vbsc_cfg; +}; + +/* + * Return the number of available descriptors in the vring taking care + * of the 16-bit index wraparound. + */ +static int +hq_num_avail(struct vring_hqueue *hq) +{ + int ndesc; + + if (*hq->hq_avail_idx >= hq->hq_cur_aidx) + ndesc = *hq->hq_avail_idx - hq->hq_cur_aidx; + else + ndesc = UINT16_MAX - hq->hq_cur_aidx + *hq->hq_avail_idx + 1; + + assert(ndesc >= 0 && ndesc <= hq->hq_size); + + return (ndesc); +} + +static void +pci_vtblk_update_status(struct pci_vtblk_softc *sc, uint32_t value) +{ + if (value == 0) { + DPRINTF(("vtblk: device reset requested !\n")); + } + + sc->vbsc_status = value; +} + +static void +pci_vtblk_proc(struct pci_vtblk_softc *sc, struct vring_hqueue *hq) +{ + struct iovec iov[VTBLK_MAXSEGS]; + struct virtio_blk_hdr *vbh; + struct virtio_desc *vd, *vid; + struct virtio_used *vu; + uint8_t *status; + int i; + int err; + int iolen; + int nsegs; + int uidx, aidx, didx; + int writeop; + off_t offset; + + uidx = *hq->hq_used_idx; + aidx = hq->hq_cur_aidx; + didx = hq->hq_avail_ring[aidx % hq->hq_size]; + assert(didx >= 0 && didx < hq->hq_size); + + vd = &hq->hq_dtable[didx]; + + /* + * Verify that the descriptor is indirect, and obtain + * the pointer to the indirect descriptor. + * There has to be space for at least 3 descriptors + * in the indirect descriptor array: the block header, + * 1 or more data descriptors, and a status byte. + */ + assert(vd->vd_flags & VRING_DESC_F_INDIRECT); + + nsegs = vd->vd_len / sizeof(struct virtio_desc); + assert(nsegs >= 3); + assert(nsegs < VTBLK_MAXSEGS + 2); + + vid = paddr_guest2host(vd->vd_addr); + assert((vid->vd_flags & VRING_DESC_F_INDIRECT) == 0); + + /* + * The first descriptor will be the read-only fixed header + */ + vbh = paddr_guest2host(vid[0].vd_addr); + assert(vid[0].vd_len == sizeof(struct virtio_blk_hdr)); + assert(vid[0].vd_flags & VRING_DESC_F_NEXT); + assert((vid[0].vd_flags & VRING_DESC_F_WRITE) == 0); + + writeop = (vbh->vbh_type == VBH_OP_WRITE); + + offset = vbh->vbh_sector * DEV_BSIZE; + + /* + * Build up the iovec based on the guest's data descriptors + */ + for (i = 1, iolen = 0; i < nsegs - 1; i++) { + iov[i-1].iov_base = paddr_guest2host(vid[i].vd_addr); + iov[i-1].iov_len = vid[i].vd_len; + iolen += vid[i].vd_len; + + assert(vid[i].vd_flags & VRING_DESC_F_NEXT); + assert((vid[i].vd_flags & VRING_DESC_F_INDIRECT) == 0); + + /* + * - write op implies read-only descriptor, + * - read op implies write-only descriptor, + * therefore test the inverse of the descriptor bit + * to the op. + */ + assert(((vid[i].vd_flags & VRING_DESC_F_WRITE) == 0) == + writeop); + } + + /* Lastly, get the address of the status byte */ + status = paddr_guest2host(vid[nsegs - 1].vd_addr); + assert(vid[nsegs - 1].vd_len == 1); + assert((vid[nsegs - 1].vd_flags & VRING_DESC_F_NEXT) == 0); + assert(vid[nsegs - 1].vd_flags & VRING_DESC_F_WRITE); + + DPRINTF(("virtio-block: %s op, %d bytes, %d segs, offset %ld\n\r", + writeop ? "write" : "read", iolen, nsegs - 2, offset)); + + if (writeop){ + err = pwritev(sc->vbsc_fd, iov, nsegs - 2, offset); + } else { + err = preadv(sc->vbsc_fd, iov, nsegs - 2, offset); + } + + *status = err < 0 ? VTBLK_S_IOERR : VTBLK_S_OK; + + /* + * Return the single indirect descriptor back to the host + */ + vu = &hq->hq_used_ring[uidx % hq->hq_size]; + vu->vu_idx = didx; + vu->vu_tlen = 1; + hq->hq_cur_aidx++; + *hq->hq_used_idx += 1; +} + +static void +pci_vtblk_qnotify(struct pci_vtblk_softc *sc) +{ + struct vring_hqueue *hq = &sc->vbsc_q; + int i; + int ndescs; + + /* + * Calculate number of ring entries to process + */ + ndescs = hq_num_avail(hq); + + if (ndescs == 0) + return; + + /* + * Run through all the entries, placing them into iovecs and + * sending when an end-of-packet is found + */ + for (i = 0; i < ndescs; i++) + pci_vtblk_proc(sc, hq); + + /* + * Generate an interrupt if able + */ + if ((*hq->hq_avail_flags & VRING_AVAIL_F_NO_INTERRUPT) == 0 && + sc->vbsc_isr == 0) { + sc->vbsc_isr = 1; + pci_generate_msi(sc->vbsc_pi, 0); + } + +} + +static void +pci_vtblk_ring_init(struct pci_vtblk_softc *sc, uint64_t pfn) +{ + struct vring_hqueue *hq; + + sc->vbsc_pfn = pfn << VRING_PFN; + + /* + * Set up host pointers to the various parts of the + * queue + */ + hq = &sc->vbsc_q; + hq->hq_size = VTBLK_RINGSZ; + + hq->hq_dtable = paddr_guest2host(pfn << VRING_PFN); + hq->hq_avail_flags = (uint16_t *)(hq->hq_dtable + hq->hq_size); + hq->hq_avail_idx = hq->hq_avail_flags + 1; + hq->hq_avail_ring = hq->hq_avail_flags + 2; + hq->hq_used_flags = (uint16_t *)roundup2((uintptr_t)hq->hq_avail_ring, + VRING_ALIGN); + hq->hq_used_idx = hq->hq_used_flags + 1; + hq->hq_used_ring = (struct virtio_used *)(hq->hq_used_flags + 2); + + /* + * Initialize queue indexes + */ + hq->hq_cur_aidx = 0; +} + +static int +pci_vtblk_init(struct vmctx *ctx, struct pci_devinst *pi, char *opts) +{ + struct stat sbuf; + struct pci_vtblk_softc *sc; + int fd; + + if (opts == NULL) { + printf("virtio-block: backing device required\n"); + return (1); + } + + /* + * Access to guest memory is required. Fail if + * memory not mapped + */ + if (paddr_guest2host(0) == NULL) + return (1); + + /* + * The supplied backing file has to exist + */ + fd = open(opts, O_RDWR); + if (fd < 0) { + perror("Could not open backing file"); + return (1); + } + + if (fstat(fd, &sbuf) < 0) { + perror("Could not stat backing file"); + close(fd); + return (1); + } + + sc = malloc(sizeof(struct pci_vtblk_softc)); + memset(sc, 0, sizeof(struct pci_vtblk_softc)); + + pi->pi_arg = sc; + sc->vbsc_pi = pi; + sc->vbsc_fd = fd; + + /* setup virtio block config space */ + sc->vbsc_cfg.vbc_capacity = sbuf.st_size / DEV_BSIZE; + sc->vbsc_cfg.vbc_seg_max = VTBLK_MAXSEGS; + sc->vbsc_cfg.vbc_blk_size = DEV_BSIZE; + sc->vbsc_cfg.vbc_size_max = 0; /* not negotiated */ + sc->vbsc_cfg.vbc_geom_c = 0; /* no geometry */ + sc->vbsc_cfg.vbc_geom_h = 0; + sc->vbsc_cfg.vbc_geom_s = 0; + sc->vbsc_cfg.vbc_sectors_max = 0; + + /* initialize config space */ + pci_set_cfgdata16(pi, PCIR_DEVICE, VIRTIO_DEV_BLOCK); + pci_set_cfgdata16(pi, PCIR_VENDOR, VIRTIO_VENDOR); + pci_set_cfgdata8(pi, PCIR_CLASS, PCIC_STORAGE); + pci_set_cfgdata16(pi, PCIR_SUBDEV_0, VIRTIO_TYPE_BLOCK); + pci_emul_alloc_bar(pi, 0, 0, PCIBAR_IO, VTBLK_REGSZ); + pci_emul_add_msicap(pi, 1); + + return (0); +} + +static void +pci_vtblk_write(struct pci_devinst *pi, int baridx, int offset, int size, + uint32_t value) +{ + struct pci_vtblk_softc *sc = pi->pi_arg; + + if (offset + size > VTBLK_REGSZ) { + DPRINTF(("vtblk_write: 2big, offset %d size %d\n", + offset, size)); + return; + } + + switch (offset) { + case VTCFG_R_GUESTCAP: + assert(size == 4); + sc->vbsc_features = value & VTBLK_S_HOSTCAPS; + break; + case VTCFG_R_PFN: + assert(size == 4); + pci_vtblk_ring_init(sc, value); + break; + case VTCFG_R_QSEL: + assert(size == 2); + sc->vbsc_lastq = value; + break; + case VTCFG_R_QNOTIFY: + assert(size == 2); + assert(value == 0); + pci_vtblk_qnotify(sc); + break; + case VTCFG_R_STATUS: + assert(size == 1); + pci_vtblk_update_status(sc, value); + break; + case VTCFG_R_HOSTCAP: + case VTCFG_R_QNUM: + case VTCFG_R_ISR: + case VTBLK_R_CFG ... VTBLK_R_CFG_END: + DPRINTF(("vtblk: write to readonly reg %d\n\r", offset)); + break; + default: + DPRINTF(("vtblk: unknown i/o write offset %d\n\r", offset)); + value = 0; + break; + } +} + +uint32_t +pci_vtblk_read(struct pci_devinst *pi, int baridx, int offset, int size) +{ + struct pci_vtblk_softc *sc = pi->pi_arg; + uint32_t value; + + if (offset + size > VTBLK_REGSZ) { + DPRINTF(("vtblk_read: 2big, offset %d size %d\n", + offset, size)); + return (0); + } + + switch (offset) { + case VTCFG_R_HOSTCAP: + assert(size == 4); + value = VTBLK_S_HOSTCAPS; + break; + case VTCFG_R_GUESTCAP: + assert(size == 4); + value = sc->vbsc_features; /* XXX never read ? */ + break; + case VTCFG_R_PFN: + assert(size == 4); + value = sc->vbsc_pfn >> VRING_PFN; + break; + case VTCFG_R_QNUM: + value = (sc->vbsc_lastq == 0) ? VTBLK_RINGSZ: 0; + break; + case VTCFG_R_QSEL: + assert(size == 2); + value = sc->vbsc_lastq; /* XXX never read ? */ + break; + case VTCFG_R_QNOTIFY: + assert(size == 2); + value = 0; /* XXX never read ? */ + break; + case VTCFG_R_STATUS: + assert(size == 1); + value = sc->vbsc_status; + break; + case VTCFG_R_ISR: + assert(size == 1); + value = sc->vbsc_isr; + sc->vbsc_isr = 0; /* a read clears this flag */ + break; + case VTBLK_R_CFG ... VTBLK_R_CFG_END: + assert(size == 1); + value = *((uint8_t *)&sc->vbsc_cfg + offset - VTBLK_R_CFG); + break; + default: + DPRINTF(("vtblk: unknown i/o read offset %d\n\r", offset)); + value = 0; + break; + } + + return (value); +} + +struct pci_devemu pci_de_vblk = { + .pe_emu = "virtio-blk", + .pe_init = pci_vtblk_init, + .pe_iow = pci_vtblk_write, + .pe_ior = pci_vtblk_read, +}; +PCI_EMUL_SET(pci_de_vblk); diff --git a/usr.sbin/bhyve/pci_virtio_net.c b/usr.sbin/bhyve/pci_virtio_net.c new file mode 100644 index 0000000..5db1eb7 --- /dev/null +++ b/usr.sbin/bhyve/pci_virtio_net.c @@ -0,0 +1,739 @@ +/*- + * Copyright (c) 2011 NetApp, Inc. + * All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * 1. Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * + * THIS SOFTWARE IS PROVIDED BY NETAPP, INC ``AS IS'' AND + * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE + * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE + * ARE DISCLAIMED. IN NO EVENT SHALL NETAPP, INC OR CONTRIBUTORS BE LIABLE + * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL + * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS + * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) + * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT + * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY + * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF + * SUCH DAMAGE. + * + * $FreeBSD$ + */ + +#include <sys/cdefs.h> +__FBSDID("$FreeBSD$"); + +#include <sys/param.h> +#include <sys/linker_set.h> +#include <sys/select.h> +#include <sys/uio.h> +#include <sys/ioctl.h> + +#include <errno.h> +#include <fcntl.h> +#include <stdio.h> +#include <stdlib.h> +#include <stdint.h> +#include <string.h> +#include <strings.h> +#include <unistd.h> +#include <assert.h> +#include <md5.h> +#include <pthread.h> + +#include "fbsdrun.h" +#include "pci_emul.h" +#include "mevent.h" +#include "virtio.h" + +#define VTNET_RINGSZ 256 + +#define VTNET_MAXSEGS 32 + +/* + * PCI config-space register offsets + */ +#define VTNET_R_CFG0 20 +#define VTNET_R_CFG1 21 +#define VTNET_R_CFG2 22 +#define VTNET_R_CFG3 23 +#define VTNET_R_CFG4 24 +#define VTNET_R_CFG5 25 +#define VTNET_R_CFG6 26 +#define VTNET_R_CFG7 27 +#define VTNET_R_MAX 27 + +#define VTNET_REGSZ VTNET_R_MAX+1 + +/* + * Host capabilities + */ +#define VTNET_S_HOSTCAPS \ + ( 0x00000020 | /* host supplies MAC */ \ + 0x00008000 | /* host can merge Rx buffers */ \ + 0x00010000 ) /* config status available */ + +/* + * Queue definitions. + */ +#define VTNET_RXQ 0 +#define VTNET_TXQ 1 +#define VTNET_CTLQ 2 + +#define VTNET_MAXQ 3 + +struct vring_hqueue { + /* Internal state */ + uint16_t hq_size; + uint16_t hq_cur_aidx; /* trails behind 'avail_idx' */ + + /* Host-context pointers to the queue */ + struct virtio_desc *hq_dtable; + uint16_t *hq_avail_flags; + uint16_t *hq_avail_idx; /* monotonically increasing */ + uint16_t *hq_avail_ring; + + uint16_t *hq_used_flags; + uint16_t *hq_used_idx; /* monotonically increasing */ + struct virtio_used *hq_used_ring; +}; + +/* + * Fixed network header size + */ +struct virtio_net_rxhdr { + uint8_t vrh_flags; + uint8_t vrh_gso_type; + uint16_t vrh_hdr_len; + uint16_t vrh_gso_size; + uint16_t vrh_csum_start; + uint16_t vrh_csum_offset; + uint16_t vrh_bufs; +} __packed; + +/* + * Debug printf + */ +static int pci_vtnet_debug; +#define DPRINTF(params) if (pci_vtnet_debug) printf params +#define WPRINTF(params) printf params + +/* + * Per-device softc + */ +struct pci_vtnet_softc { + struct pci_devinst *vsc_pi; + pthread_mutex_t vsc_mtx; + struct mevent *vsc_mevp; + + int vsc_curq; + int vsc_status; + int vsc_isr; + int vsc_tapfd; + int vsc_rx_ready; + int vsc_rxpend; + + uint32_t vsc_features; + uint8_t vsc_macaddr[6]; + + uint64_t vsc_pfn[VTNET_MAXQ]; + struct vring_hqueue vsc_hq[VTNET_MAXQ]; +}; + +/* + * Return the number of available descriptors in the vring taking care + * of the 16-bit index wraparound. + */ +static int +hq_num_avail(struct vring_hqueue *hq) +{ + int ndesc; + + if (*hq->hq_avail_idx >= hq->hq_cur_aidx) + ndesc = *hq->hq_avail_idx - hq->hq_cur_aidx; + else + ndesc = UINT16_MAX - hq->hq_cur_aidx + *hq->hq_avail_idx + 1; + + assert(ndesc >= 0 && ndesc <= hq->hq_size); + + return (ndesc); +} + +static uint16_t +pci_vtnet_qsize(int qnum) +{ + /* XXX no ctl queue currently */ + if (qnum == VTNET_CTLQ) { + return (0); + } + + /* XXX fixed currently. Maybe different for tx/rx/ctl */ + return (VTNET_RINGSZ); +} + +static void +pci_vtnet_update_status(struct pci_vtnet_softc *sc, uint32_t value) +{ + if (value == 0) { + DPRINTF(("vtnet: device reset requested !\n")); + } + + sc->vsc_status = value; +} + +/* + * Called to send a buffer chain out to the tap device + */ +static void +pci_vtnet_tap_tx(struct pci_vtnet_softc *sc, struct iovec *iov, int iovcnt, + int len) +{ + char pad[60]; + + if (sc->vsc_tapfd == -1) + return; + + /* + * If the length is < 60, pad out to that and add the + * extra zero'd segment to the iov. It is guaranteed that + * there is always an extra iov available by the caller. + */ + if (len < 60) { + memset(pad, 0, 60 - len); + iov[iovcnt].iov_base = pad; + iov[iovcnt].iov_len = 60 - len; + iovcnt++; + } + (void) writev(sc->vsc_tapfd, iov, iovcnt); +} + +/* + * Called when there is read activity on the tap file descriptor. + * Each buffer posted by the guest is assumed to be able to contain + * an entire ethernet frame + rx header. + * MP note: the dummybuf is only used for discarding frames, so there + * is no need for it to be per-vtnet or locked. + */ +static uint8_t dummybuf[2048]; + +static void +pci_vtnet_tap_rx(struct pci_vtnet_softc *sc) +{ + struct virtio_desc *vd; + struct virtio_used *vu; + struct vring_hqueue *hq; + struct virtio_net_rxhdr *vrx; + uint8_t *buf; + int i; + int len; + int ndescs; + int didx, uidx, aidx; /* descriptor, avail and used index */ + + /* + * Should never be called without a valid tap fd + */ + assert(sc->vsc_tapfd != -1); + + /* + * But, will be called when the rx ring hasn't yet + * been set up. + */ + if (sc->vsc_rx_ready == 0) { + /* + * Drop the packet and try later. + */ + (void) read(sc->vsc_tapfd, dummybuf, sizeof(dummybuf)); + return; + } + + /* + * Calculate the number of available rx buffers + */ + hq = &sc->vsc_hq[VTNET_RXQ]; + + ndescs = hq_num_avail(hq); + + if (ndescs == 0) { + /* + * Need to wait for host notification to read + */ + if (sc->vsc_rxpend == 0) { + WPRINTF(("vtnet: no rx descriptors !\n")); + sc->vsc_rxpend = 1; + } + + /* + * Drop the packet and try later + */ + (void) read(sc->vsc_tapfd, dummybuf, sizeof(dummybuf)); + return; + } + + aidx = hq->hq_cur_aidx; + uidx = *hq->hq_used_idx; + for (i = 0; i < ndescs; i++) { + /* + * 'aidx' indexes into the an array of descriptor indexes + */ + didx = hq->hq_avail_ring[aidx % hq->hq_size]; + assert(didx >= 0 && didx < hq->hq_size); + + vd = &hq->hq_dtable[didx]; + + /* + * Get a pointer to the rx header, and use the + * data immediately following it for the packet buffer. + */ + vrx = (struct virtio_net_rxhdr *)paddr_guest2host(vd->vd_addr); + buf = (uint8_t *)(vrx + 1); + + len = read(sc->vsc_tapfd, buf, + vd->vd_len - sizeof(struct virtio_net_rxhdr)); + + if (len < 0 && errno == EWOULDBLOCK) { + break; + } + + /* + * The only valid field in the rx packet header is the + * number of buffers, which is always 1 without TSO + * support. + */ + memset(vrx, 0, sizeof(struct virtio_net_rxhdr)); + vrx->vrh_bufs = 1; + + /* + * Write this descriptor into the used ring + */ + vu = &hq->hq_used_ring[uidx % hq->hq_size]; + vu->vu_idx = didx; + vu->vu_tlen = len + sizeof(struct virtio_net_rxhdr); + uidx++; + aidx++; + } + + /* + * Update the used pointer, and signal an interrupt if allowed + */ + *hq->hq_used_idx = uidx; + hq->hq_cur_aidx = aidx; + + if ((*hq->hq_avail_flags & VRING_AVAIL_F_NO_INTERRUPT) == 0) { + sc->vsc_isr |= 1; + pci_generate_msi(sc->vsc_pi, 0); + } +} + +static void +pci_vtnet_tap_callback(int fd, enum ev_type type, void *param) +{ + struct pci_vtnet_softc *sc = param; + + pthread_mutex_lock(&sc->vsc_mtx); + pci_vtnet_tap_rx(sc); + pthread_mutex_unlock(&sc->vsc_mtx); + +} + +static void +pci_vtnet_ping_rxq(struct pci_vtnet_softc *sc) +{ + /* + * A qnotify means that the rx process can now begin + */ + if (sc->vsc_rx_ready == 0) { + sc->vsc_rx_ready = 1; + } + + /* + * If the rx queue was empty, attempt to receive a + * packet that was previously blocked due to no rx bufs + * available + */ + if (sc->vsc_rxpend) { + WPRINTF(("vtnet: rx resumed\n\r")); + sc->vsc_rxpend = 0; + pci_vtnet_tap_rx(sc); + } +} + +static void +pci_vtnet_proctx(struct pci_vtnet_softc *sc, struct vring_hqueue *hq) +{ + struct iovec iov[VTNET_MAXSEGS + 1]; + struct virtio_desc *vd; + struct virtio_used *vu; + int i; + int plen; + int tlen; + int uidx, aidx, didx; + + uidx = *hq->hq_used_idx; + aidx = hq->hq_cur_aidx; + didx = hq->hq_avail_ring[aidx % hq->hq_size]; + assert(didx >= 0 && didx < hq->hq_size); + + vd = &hq->hq_dtable[didx]; + + /* + * Run through the chain of descriptors, ignoring the + * first header descriptor. However, include the header + * length in the total length that will be put into the + * used queue. + */ + tlen = vd->vd_len; + vd = &hq->hq_dtable[vd->vd_next]; + + for (i = 0, plen = 0; + i < VTNET_MAXSEGS; + i++, vd = &hq->hq_dtable[vd->vd_next]) { + iov[i].iov_base = paddr_guest2host(vd->vd_addr); + iov[i].iov_len = vd->vd_len; + plen += vd->vd_len; + tlen += vd->vd_len; + + if ((vd->vd_flags & VRING_DESC_F_NEXT) == 0) + break; + } + assert(i < VTNET_MAXSEGS); + + DPRINTF(("virtio: packet send, %d bytes, %d segs\n\r", plen, i + 1)); + pci_vtnet_tap_tx(sc, iov, i + 1, plen); + + /* + * Return this chain back to the host + */ + vu = &hq->hq_used_ring[uidx % hq->hq_size]; + vu->vu_idx = didx; + vu->vu_tlen = tlen; + hq->hq_cur_aidx = aidx + 1; + *hq->hq_used_idx = uidx + 1; + + /* + * Generate an interrupt if able + */ + if ((*hq->hq_avail_flags & VRING_AVAIL_F_NO_INTERRUPT) == 0) { + sc->vsc_isr |= 1; + pci_generate_msi(sc->vsc_pi, 0); + } +} + +static void +pci_vtnet_ping_txq(struct pci_vtnet_softc *sc) +{ + struct vring_hqueue *hq = &sc->vsc_hq[VTNET_TXQ]; + int i; + int ndescs; + + /* + * Calculate number of ring entries to process + */ + ndescs = hq_num_avail(hq); + + if (ndescs == 0) + return; + + /* + * Run through all the entries, placing them into iovecs and + * sending when an end-of-packet is found + */ + for (i = 0; i < ndescs; i++) + pci_vtnet_proctx(sc, hq); +} + +static void +pci_vtnet_ping_ctlq(struct pci_vtnet_softc *sc) +{ + + DPRINTF(("vtnet: control qnotify!\n\r")); +} + +static void +pci_vtnet_ring_init(struct pci_vtnet_softc *sc, uint64_t pfn) +{ + struct vring_hqueue *hq; + int qnum = sc->vsc_curq; + + assert(qnum < VTNET_MAXQ); + + sc->vsc_pfn[qnum] = pfn << VRING_PFN; + + /* + * Set up host pointers to the various parts of the + * queue + */ + hq = &sc->vsc_hq[qnum]; + hq->hq_size = pci_vtnet_qsize(qnum); + + hq->hq_dtable = paddr_guest2host(pfn << VRING_PFN); + hq->hq_avail_flags = (uint16_t *)(hq->hq_dtable + hq->hq_size); + hq->hq_avail_idx = hq->hq_avail_flags + 1; + hq->hq_avail_ring = hq->hq_avail_flags + 2; + hq->hq_used_flags = (uint16_t *)roundup2((uintptr_t)hq->hq_avail_ring, + VRING_ALIGN); + hq->hq_used_idx = hq->hq_used_flags + 1; + hq->hq_used_ring = (struct virtio_used *)(hq->hq_used_flags + 2); + + /* + * Initialize queue indexes + */ + hq->hq_cur_aidx = 0; +} + +static int +pci_vtnet_init(struct vmctx *ctx, struct pci_devinst *pi, char *opts) +{ + MD5_CTX mdctx; + unsigned char digest[16]; + char nstr[80]; + struct pci_vtnet_softc *sc; + + /* + * Access to guest memory is required. Fail if + * memory not mapped + */ + if (paddr_guest2host(0) == NULL) + return (1); + + sc = malloc(sizeof(struct pci_vtnet_softc)); + memset(sc, 0, sizeof(struct pci_vtnet_softc)); + + pi->pi_arg = sc; + sc->vsc_pi = pi; + + pthread_mutex_init(&sc->vsc_mtx, NULL); + + /* + * Attempt to open the tap device + */ + sc->vsc_tapfd = -1; + if (opts != NULL) { + char tbuf[80]; + + strcpy(tbuf, "/dev/"); + strncat(tbuf, opts, sizeof(tbuf) - strlen(tbuf)); + + sc->vsc_tapfd = open(tbuf, O_RDWR); + if (sc->vsc_tapfd == -1) { + WPRINTF(("open of tap device %s failed\n", tbuf)); + } else { + /* + * Set non-blocking and register for read + * notifications with the event loop + */ + int opt = 1; + if (ioctl(sc->vsc_tapfd, FIONBIO, &opt) < 0) { + WPRINTF(("tap device O_NONBLOCK failed\n")); + close(sc->vsc_tapfd); + sc->vsc_tapfd = -1; + } + + sc->vsc_mevp = mevent_add(sc->vsc_tapfd, + EVF_READ, + pci_vtnet_tap_callback, + sc); + if (sc->vsc_mevp == NULL) { + WPRINTF(("Could not register event\n")); + close(sc->vsc_tapfd); + sc->vsc_tapfd = -1; + } + } + } + + /* + * The MAC address is the standard NetApp OUI of 00-a0-98, + * followed by an MD5 of the vm name. The slot number is + * prepended to this for slots other than 1, so that + * CFE can netboot from the equivalent of slot 1. + */ + if (pi->pi_slot == 1) { + strncpy(nstr, vmname, sizeof(nstr)); + } else { + snprintf(nstr, sizeof(nstr), "%d-%s", pi->pi_slot, vmname); + } + + MD5Init(&mdctx); + MD5Update(&mdctx, nstr, strlen(nstr)); + MD5Final(digest, &mdctx); + + sc->vsc_macaddr[0] = 0x00; + sc->vsc_macaddr[1] = 0xa0; + sc->vsc_macaddr[2] = 0x98; + sc->vsc_macaddr[3] = digest[0]; + sc->vsc_macaddr[4] = digest[1]; + sc->vsc_macaddr[5] = digest[2]; + + /* initialize config space */ + pci_set_cfgdata16(pi, PCIR_DEVICE, VIRTIO_DEV_NET); + pci_set_cfgdata16(pi, PCIR_VENDOR, VIRTIO_VENDOR); + pci_set_cfgdata8(pi, PCIR_CLASS, PCIC_NETWORK); + pci_set_cfgdata16(pi, PCIR_SUBDEV_0, VIRTIO_TYPE_NET); + pci_emul_alloc_bar(pi, 0, 0, PCIBAR_IO, VTNET_REGSZ); + pci_emul_add_msicap(pi, 1); + + return (0); +} + +/* + * Function pointer array to handle queue notifications + */ +static void (*pci_vtnet_qnotify[VTNET_MAXQ])(struct pci_vtnet_softc *) = { + pci_vtnet_ping_rxq, + pci_vtnet_ping_txq, + pci_vtnet_ping_ctlq +}; + +static void +pci_vtnet_write(struct pci_devinst *pi, int baridx, int offset, int size, + uint32_t value) +{ + struct pci_vtnet_softc *sc = pi->pi_arg; + + if (offset + size > VTNET_REGSZ) { + DPRINTF(("vtnet_write: 2big, offset %d size %d\n", + offset, size)); + return; + } + + pthread_mutex_lock(&sc->vsc_mtx); + + switch (offset) { + case VTCFG_R_GUESTCAP: + assert(size == 4); + sc->vsc_features = value & VTNET_S_HOSTCAPS; + break; + case VTCFG_R_PFN: + assert(size == 4); + pci_vtnet_ring_init(sc, value); + break; + case VTCFG_R_QSEL: + assert(size == 2); + assert(value < VTNET_MAXQ); + sc->vsc_curq = value; + break; + case VTCFG_R_QNOTIFY: + assert(size == 2); + assert(value < VTNET_MAXQ); + (*pci_vtnet_qnotify[value])(sc); + break; + case VTCFG_R_STATUS: + assert(size == 1); + pci_vtnet_update_status(sc, value); + break; + case VTNET_R_CFG0: + case VTNET_R_CFG1: + case VTNET_R_CFG2: + case VTNET_R_CFG3: + case VTNET_R_CFG4: + case VTNET_R_CFG5: + /* + * The driver is allowed to change the MAC address + */ + assert(size == 1); + sc->vsc_macaddr[offset - VTNET_R_CFG0] = value; + break; + case VTCFG_R_HOSTCAP: + case VTCFG_R_QNUM: + case VTCFG_R_ISR: + case VTNET_R_CFG6: + case VTNET_R_CFG7: + DPRINTF(("vtnet: write to readonly reg %d\n\r", offset)); + break; + default: + DPRINTF(("vtnet: unknown i/o write offset %d\n\r", offset)); + value = 0; + break; + } + + pthread_mutex_unlock(&sc->vsc_mtx); +} + +uint32_t +pci_vtnet_read(struct pci_devinst *pi, int baridx, int offset, int size) +{ + struct pci_vtnet_softc *sc = pi->pi_arg; + uint32_t value; + + if (offset + size > VTNET_REGSZ) { + DPRINTF(("vtnet_read: 2big, offset %d size %d\n", + offset, size)); + return (0); + } + + pthread_mutex_lock(&sc->vsc_mtx); + + switch (offset) { + case VTCFG_R_HOSTCAP: + assert(size == 4); + value = VTNET_S_HOSTCAPS; + break; + case VTCFG_R_GUESTCAP: + assert(size == 4); + value = sc->vsc_features; /* XXX never read ? */ + break; + case VTCFG_R_PFN: + assert(size == 4); + value = sc->vsc_pfn[sc->vsc_curq] >> VRING_PFN; + break; + case VTCFG_R_QNUM: + assert(size == 2); + value = pci_vtnet_qsize(sc->vsc_curq); + break; + case VTCFG_R_QSEL: + assert(size == 2); + value = sc->vsc_curq; /* XXX never read ? */ + break; + case VTCFG_R_QNOTIFY: + assert(size == 2); + value = sc->vsc_curq; /* XXX never read ? */ + break; + case VTCFG_R_STATUS: + assert(size == 1); + value = sc->vsc_status; + break; + case VTCFG_R_ISR: + assert(size == 1); + value = sc->vsc_isr; + sc->vsc_isr = 0; /* a read clears this flag */ + break; + case VTNET_R_CFG0: + case VTNET_R_CFG1: + case VTNET_R_CFG2: + case VTNET_R_CFG3: + case VTNET_R_CFG4: + case VTNET_R_CFG5: + assert(size == 1); + value = sc->vsc_macaddr[offset - VTNET_R_CFG0]; + break; + case VTNET_R_CFG6: + assert(size == 1); + value = 0x01; /* XXX link always up */ + break; + case VTNET_R_CFG7: + assert(size == 1); + value = 0; /* link status is in the LSB */ + break; + default: + DPRINTF(("vtnet: unknown i/o read offset %d\n\r", offset)); + value = 0; + break; + } + + pthread_mutex_unlock(&sc->vsc_mtx); + + return (value); +} + +struct pci_devemu pci_de_vnet = { + .pe_emu = "virtio-net", + .pe_init = pci_vtnet_init, + .pe_iow = pci_vtnet_write, + .pe_ior = pci_vtnet_read, +}; +PCI_EMUL_SET(pci_de_vnet); diff --git a/usr.sbin/bhyve/pit_8254.c b/usr.sbin/bhyve/pit_8254.c new file mode 100644 index 0000000..b510161 --- /dev/null +++ b/usr.sbin/bhyve/pit_8254.c @@ -0,0 +1,196 @@ +/*- + * Copyright (c) 2011 NetApp, Inc. + * All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * 1. Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * + * THIS SOFTWARE IS PROVIDED BY NETAPP, INC ``AS IS'' AND + * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE + * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE + * ARE DISCLAIMED. IN NO EVENT SHALL NETAPP, INC OR CONTRIBUTORS BE LIABLE + * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL + * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS + * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) + * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT + * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY + * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF + * SUCH DAMAGE. + * + * $FreeBSD$ + */ + +#include <sys/cdefs.h> +__FBSDID("$FreeBSD$"); + +#include <sys/time.h> + +#include <machine/clock.h> + +#include <stdio.h> +#include <assert.h> + +#include "fbsdrun.h" +#include "inout.h" +#include "pit_8254.h" + +#define TIMER_SEL_MASK 0xc0 +#define TIMER_RW_MASK 0x30 +#define TIMER_MODE_MASK 0x0f +#define TIMER_SEL_READBACK 0xc0 + +#define TIMER_DIV(freq, hz) (((freq) + (hz) / 2) / (hz)) + +#define PIT_8254_FREQ 1193182 +static const int nsecs_per_tick = 1000000000 / PIT_8254_FREQ; + +struct counter { + struct timeval tv; /* uptime when counter was loaded */ + uint16_t initial; /* initial counter value */ + uint8_t cr[2]; + uint8_t ol[2]; + int crbyte; + int olbyte; +}; + +static void +timevalfix(struct timeval *t1) +{ + + if (t1->tv_usec < 0) { + t1->tv_sec--; + t1->tv_usec += 1000000; + } + if (t1->tv_usec >= 1000000) { + t1->tv_sec++; + t1->tv_usec -= 1000000; + } +} + +static void +timevalsub(struct timeval *t1, const struct timeval *t2) +{ + + t1->tv_sec -= t2->tv_sec; + t1->tv_usec -= t2->tv_usec; + timevalfix(t1); +} + +static void +latch(struct counter *c) +{ + struct timeval tv2; + uint16_t lval; + uint64_t delta_nsecs, delta_ticks; + + /* cannot latch a new value until the old one has been consumed */ + if (c->olbyte != 0) + return; + + if (c->initial == 0 || c->initial == 1) { + /* + * XXX the program that runs the VM can be stopped and + * restarted at any time. This means that state that was + * created by the guest is destroyed between invocations + * of the program. + * + * If the counter's initial value is not programmed we + * assume a value that would be set to generate 'guest_hz' + * interrupts per second. + */ + c->initial = TIMER_DIV(PIT_8254_FREQ, guest_hz); + gettimeofday(&c->tv, NULL); + } + + (void)gettimeofday(&tv2, NULL); + timevalsub(&tv2, &c->tv); + delta_nsecs = tv2.tv_sec * 1000000000 + tv2.tv_usec * 1000; + delta_ticks = delta_nsecs / nsecs_per_tick; + + lval = c->initial - delta_ticks % c->initial; + c->olbyte = 2; + c->ol[1] = lval; /* LSB */ + c->ol[0] = lval >> 8; /* MSB */ +} + +static int +pit_8254_handler(struct vmctx *ctx, int vcpu, int in, int port, int bytes, + uint32_t *eax, void *arg) +{ + int sel, rw, mode; + uint8_t val; + struct counter *c; + + static struct counter counter[3]; + + if (bytes != 1) + return (-1); + + val = *eax; + + if (port == TIMER_MODE) { + assert(in == 0); + sel = val & TIMER_SEL_MASK; + rw = val & TIMER_RW_MASK; + mode = val & TIMER_MODE_MASK; + + if (sel == TIMER_SEL_READBACK) + return (-1); + if (rw != TIMER_LATCH && rw != TIMER_16BIT) + return (-1); + + if (rw != TIMER_LATCH) { + /* + * Counter mode is not affected when issuing a + * latch command. + */ + if (mode != TIMER_RATEGEN && mode != TIMER_SQWAVE) + return (-1); + } + + c = &counter[sel >> 6]; + if (rw == TIMER_LATCH) + latch(c); + else + c->olbyte = 0; /* reset latch after reprogramming */ + + return (0); + } + + /* counter ports */ + assert(port >= TIMER_CNTR0 && port <= TIMER_CNTR2); + c = &counter[port - TIMER_CNTR0]; + + if (in) { + /* + * XXX + * The spec says that once the output latch is completely + * read it should revert to "following" the counter. We don't + * do this because it is hard and any reasonable OS should + * always latch the counter before trying to read it. + */ + if (c->olbyte == 0) + c->olbyte = 2; + *eax = c->ol[--c->olbyte]; + } else { + c->cr[c->crbyte++] = *eax; + if (c->crbyte == 2) { + c->crbyte = 0; + c->initial = c->cr[0] | (uint16_t)c->cr[1] << 8; + gettimeofday(&c->tv, NULL); + } + } + + return (0); +} + +INOUT_PORT(8254, TIMER_MODE, IOPORT_F_OUT, pit_8254_handler); +INOUT_PORT(8254, TIMER_CNTR0, IOPORT_F_INOUT, pit_8254_handler); +INOUT_PORT(8254, TIMER_CNTR1, IOPORT_F_INOUT, pit_8254_handler); +INOUT_PORT(8254, TIMER_CNTR2, IOPORT_F_INOUT, pit_8254_handler); diff --git a/usr.sbin/bhyve/pit_8254.h b/usr.sbin/bhyve/pit_8254.h new file mode 100644 index 0000000..61bd15d --- /dev/null +++ b/usr.sbin/bhyve/pit_8254.h @@ -0,0 +1,45 @@ +/*- + * Copyright (c) 2011 NetApp, Inc. + * All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * 1. Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * + * THIS SOFTWARE IS PROVIDED BY NETAPP, INC ``AS IS'' AND + * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE + * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE + * ARE DISCLAIMED. IN NO EVENT SHALL NETAPP, INC OR CONTRIBUTORS BE LIABLE + * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL + * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS + * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) + * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT + * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY + * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF + * SUCH DAMAGE. + * + * $FreeBSD$ + */ + +#ifndef _PIT_8254_H_ +#define _PIT_8254_H_ + +/* + * Borrowed from amd64/include/timerreg.h because in that file it is + * conditionally compiled for #ifdef _KERNEL only. + */ + +#include <dev/ic/i8253reg.h> + +#define IO_TIMER1 0x40 /* 8253 Timer #1 */ +#define TIMER_CNTR0 (IO_TIMER1 + TIMER_REG_CNTR0) +#define TIMER_CNTR1 (IO_TIMER1 + TIMER_REG_CNTR1) +#define TIMER_CNTR2 (IO_TIMER1 + TIMER_REG_CNTR2) +#define TIMER_MODE (IO_TIMER1 + TIMER_REG_MODE) + +#endif /* _PIT_8254_H_ */ diff --git a/usr.sbin/bhyve/post.c b/usr.sbin/bhyve/post.c new file mode 100644 index 0000000..092a551 --- /dev/null +++ b/usr.sbin/bhyve/post.c @@ -0,0 +1,51 @@ +/*- + * Copyright (c) 2011 NetApp, Inc. + * All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * 1. Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * + * THIS SOFTWARE IS PROVIDED BY NETAPP, INC ``AS IS'' AND + * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE + * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE + * ARE DISCLAIMED. IN NO EVENT SHALL NETAPP, INC OR CONTRIBUTORS BE LIABLE + * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL + * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS + * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) + * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT + * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY + * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF + * SUCH DAMAGE. + * + * $FreeBSD$ + */ + +#include <sys/cdefs.h> +__FBSDID("$FreeBSD$"); + +#include <sys/types.h> + +#include <assert.h> + +#include "inout.h" + +static int +post_data_handler(struct vmctx *ctx, int vcpu, int in, int port, int bytes, + uint32_t *eax, void *arg) +{ + assert(in == 1); + + if (bytes != 1) + return (-1); + + *eax = 0xff; /* return some garbage */ + return (0); +} + +INOUT_PORT(post, 0x84, IOPORT_F_IN, post_data_handler); diff --git a/usr.sbin/bhyve/rtc.c b/usr.sbin/bhyve/rtc.c new file mode 100644 index 0000000..a6f44e0 --- /dev/null +++ b/usr.sbin/bhyve/rtc.c @@ -0,0 +1,268 @@ +/*- + * Copyright (c) 2011 NetApp, Inc. + * All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * 1. Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * + * THIS SOFTWARE IS PROVIDED BY NETAPP, INC ``AS IS'' AND + * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE + * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE + * ARE DISCLAIMED. IN NO EVENT SHALL NETAPP, INC OR CONTRIBUTORS BE LIABLE + * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL + * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS + * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) + * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT + * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY + * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF + * SUCH DAMAGE. + * + * $FreeBSD$ + */ + +#include <sys/cdefs.h> +__FBSDID("$FreeBSD$"); + +#include <sys/types.h> +#include <sys/time.h> + +#include <stdio.h> +#include <time.h> +#include <assert.h> + +#include "inout.h" + +#define IO_RTC 0x70 + +#define RTC_SEC 0x00 /* seconds */ +#define RTC_MIN 0x02 +#define RTC_HRS 0x04 +#define RTC_WDAY 0x06 +#define RTC_DAY 0x07 +#define RTC_MONTH 0x08 +#define RTC_YEAR 0x09 +#define RTC_CENTURY 0x32 /* current century */ + +#define RTC_STATUSA 0xA +#define RTCSA_TUP 0x80 /* time update, don't look now */ + +#define RTC_STATUSB 0xB +#define RTCSB_DST 0x01 +#define RTCSB_24HR 0x02 +#define RTCSB_BIN 0x04 /* 0 = BCD, 1 = Binary */ +#define RTCSB_PINTR 0x40 /* 1 = enable periodic clock interrupt */ +#define RTCSB_HALT 0x80 /* stop clock updates */ + +#define RTC_INTR 0x0c /* status register C (R) interrupt source */ + +#define RTC_STATUSD 0x0d /* status register D (R) Lost Power */ +#define RTCSD_PWR 0x80 /* clock power OK */ + +#define RTC_DIAG 0x0e + +#define RTC_RSTCODE 0x0f + +static int addr; + +/* XXX initialize these to default values as they would be from BIOS */ +static uint8_t status_a, status_b, rstcode; + +static u_char const bin2bcd_data[] = { + 0x00, 0x01, 0x02, 0x03, 0x04, 0x05, 0x06, 0x07, 0x08, 0x09, + 0x10, 0x11, 0x12, 0x13, 0x14, 0x15, 0x16, 0x17, 0x18, 0x19, + 0x20, 0x21, 0x22, 0x23, 0x24, 0x25, 0x26, 0x27, 0x28, 0x29, + 0x30, 0x31, 0x32, 0x33, 0x34, 0x35, 0x36, 0x37, 0x38, 0x39, + 0x40, 0x41, 0x42, 0x43, 0x44, 0x45, 0x46, 0x47, 0x48, 0x49, + 0x50, 0x51, 0x52, 0x53, 0x54, 0x55, 0x56, 0x57, 0x58, 0x59, + 0x60, 0x61, 0x62, 0x63, 0x64, 0x65, 0x66, 0x67, 0x68, 0x69, + 0x70, 0x71, 0x72, 0x73, 0x74, 0x75, 0x76, 0x77, 0x78, 0x79, + 0x80, 0x81, 0x82, 0x83, 0x84, 0x85, 0x86, 0x87, 0x88, 0x89, + 0x90, 0x91, 0x92, 0x93, 0x94, 0x95, 0x96, 0x97, 0x98, 0x99 +}; +#define bin2bcd(bin) (bin2bcd_data[bin]) + +#define rtcout(val) ((status_b & RTCSB_BIN) ? (val) : bin2bcd((val))) + +static void +timevalfix(struct timeval *t1) +{ + + if (t1->tv_usec < 0) { + t1->tv_sec--; + t1->tv_usec += 1000000; + } + if (t1->tv_usec >= 1000000) { + t1->tv_sec++; + t1->tv_usec -= 1000000; + } +} + +static void +timevalsub(struct timeval *t1, const struct timeval *t2) +{ + + t1->tv_sec -= t2->tv_sec; + t1->tv_usec -= t2->tv_usec; + timevalfix(t1); +} + +static int +rtc_addr_handler(struct vmctx *ctx, int vcpu, int in, int port, int bytes, + uint32_t *eax, void *arg) +{ + assert(in == 0); + + if (bytes != 1) + return (-1); + + switch (*eax) { + case RTC_SEC: + case RTC_MIN: + case RTC_HRS: + case RTC_WDAY: + case RTC_DAY: + case RTC_MONTH: + case RTC_YEAR: + case RTC_CENTURY: + case RTC_STATUSA: + case RTC_STATUSB: + case RTC_INTR: + case RTC_STATUSD: + case RTC_DIAG: + case RTC_RSTCODE: + break; + default: + return (-1); + } + + addr = *eax; + return (0); +} + +static int +rtc_data_handler(struct vmctx *ctx, int vcpu, int in, int port, int bytes, + uint32_t *eax, void *arg) +{ + int hour; + time_t t; + struct timeval cur, delta; + + static struct timeval last; + static struct tm tm; + + if (bytes != 1) + return (-1); + + gettimeofday(&cur, NULL); + + /* + * Increment the cached time only once per second so we can guarantee + * that the guest has at least one second to read the hour:min:sec + * separately and still get a coherent view of the time. + */ + delta = cur; + timevalsub(&delta, &last); + if (delta.tv_sec >= 1 && (status_b & RTCSB_HALT) == 0) { + t = cur.tv_sec; + localtime_r(&t, &tm); + last = cur; + } + + if (in) { + switch (addr) { + case RTC_SEC: + *eax = rtcout(tm.tm_sec); + return (0); + case RTC_MIN: + *eax = rtcout(tm.tm_min); + return (0); + case RTC_HRS: + if (status_b & RTCSB_24HR) + hour = tm.tm_hour; + else + hour = (tm.tm_hour % 12) + 1; + + *eax = rtcout(hour); + + /* + * If we are representing time in the 12-hour format + * then set the MSB to indicate PM. + */ + if ((status_b & RTCSB_24HR) == 0 && tm.tm_hour >= 12) + *eax |= 0x80; + + return (0); + case RTC_WDAY: + *eax = rtcout(tm.tm_wday + 1); + return (0); + case RTC_DAY: + *eax = rtcout(tm.tm_mday); + return (0); + case RTC_MONTH: + *eax = rtcout(tm.tm_mon + 1); + return (0); + case RTC_YEAR: + *eax = rtcout(tm.tm_year % 100); + return (0); + case RTC_CENTURY: + *eax = rtcout(tm.tm_year / 100); + break; + case RTC_STATUSA: + *eax = status_a; + return (0); + case RTC_INTR: + *eax = 0; + return (0); + case RTC_STATUSD: + *eax = RTCSD_PWR; + return (0); + case RTC_DIAG: + *eax = 0; + return (0); + case RTC_RSTCODE: + *eax = rstcode; + return (0); + default: + return (-1); + } + } + + switch (addr) { + case RTC_STATUSA: + status_a = *eax & ~RTCSA_TUP; + break; + case RTC_STATUSB: + /* XXX not implemented yet XXX */ + if (*eax & RTCSB_PINTR) + return (-1); + status_b = *eax; + break; + case RTC_RSTCODE: + rstcode = *eax; + break; + case RTC_SEC: + case RTC_MIN: + case RTC_HRS: + case RTC_WDAY: + case RTC_DAY: + case RTC_MONTH: + case RTC_YEAR: + case RTC_CENTURY: + /* + * Ignore writes to the time of day registers + */ + break; + default: + return (-1); + } + return (0); +} + +INOUT_PORT(rtc, IO_RTC, IOPORT_F_OUT, rtc_addr_handler); +INOUT_PORT(rtc, IO_RTC + 1, IOPORT_F_INOUT, rtc_data_handler); diff --git a/usr.sbin/bhyve/uart.c b/usr.sbin/bhyve/uart.c new file mode 100644 index 0000000..640f3bf --- /dev/null +++ b/usr.sbin/bhyve/uart.c @@ -0,0 +1,60 @@ +/*- + * Copyright (c) 2011 NetApp, Inc. + * All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * 1. Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * + * THIS SOFTWARE IS PROVIDED BY NETAPP, INC ``AS IS'' AND + * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE + * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE + * ARE DISCLAIMED. IN NO EVENT SHALL NETAPP, INC OR CONTRIBUTORS BE LIABLE + * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL + * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS + * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) + * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT + * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY + * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF + * SUCH DAMAGE. + * + * $FreeBSD$ + */ + +#include <sys/cdefs.h> +__FBSDID("$FreeBSD$"); + +#include <sys/types.h> +#include <assert.h> + +#include "inout.h" + +#define COM1 0x3F8 +#define COM2 0x2F8 + +#define REG_IIR 2 + +static int +com_handler(struct vmctx *ctx, int vcpu, int in, int port, int bytes, + uint32_t *eax, void *arg) +{ + assert(in); + + if (bytes != 1) + return (-1); + + /* + * COM port is not implemented so we return 0xFF for all registers + */ + *eax = 0xFF; + + return (0); +} + +INOUT_PORT(uart, COM1 + REG_IIR, IOPORT_F_IN, com_handler); +INOUT_PORT(uart, COM2 + REG_IIR, IOPORT_F_IN, com_handler); diff --git a/usr.sbin/bhyve/virtio.h b/usr.sbin/bhyve/virtio.h new file mode 100644 index 0000000..474e244 --- /dev/null +++ b/usr.sbin/bhyve/virtio.h @@ -0,0 +1,85 @@ +/*- + * Copyright (c) 2011 NetApp, Inc. + * All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * 1. Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * + * THIS SOFTWARE IS PROVIDED BY NETAPP, INC ``AS IS'' AND + * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE + * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE + * ARE DISCLAIMED. IN NO EVENT SHALL NETAPP, INC OR CONTRIBUTORS BE LIABLE + * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL + * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS + * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) + * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT + * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY + * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF + * SUCH DAMAGE. + * + * $FreeBSD$ + */ + +#ifndef _VIRTIO_H_ +#define _VIRTIO_H_ + +#define VRING_ALIGN 4096 + +#define VRING_DESC_F_NEXT (1 << 0) +#define VRING_DESC_F_WRITE (1 << 1) +#define VRING_DESC_F_INDIRECT (1 << 2) + +#define VRING_AVAIL_F_NO_INTERRUPT 1 + +struct virtio_desc { + uint64_t vd_addr; + uint32_t vd_len; + uint16_t vd_flags; + uint16_t vd_next; +} __packed; + +struct virtio_used { + uint32_t vu_idx; + uint32_t vu_tlen; +} __packed; + +/* + * PFN register shift amount + */ +#define VRING_PFN 12 + +/* + * Virtio device types + */ +#define VIRTIO_TYPE_NET 1 +#define VIRTIO_TYPE_BLOCK 2 + +/* + * PCI vendor/device IDs + */ +#define VIRTIO_VENDOR 0x1AF4 +#define VIRTIO_DEV_NET 0x1000 +#define VIRTIO_DEV_BLOCK 0x1001 + +/* + * PCI config space constants + */ +#define VTCFG_R_HOSTCAP 0 +#define VTCFG_R_GUESTCAP 4 +#define VTCFG_R_PFN 8 +#define VTCFG_R_QNUM 12 +#define VTCFG_R_QSEL 14 +#define VTCFG_R_QNOTIFY 16 +#define VTCFG_R_STATUS 18 +#define VTCFG_R_ISR 19 +#define VTCFG_R_CFG0 20 /* No MSI-X */ +#define VTCFG_R_CFG1 24 /* With MSI-X */ +#define VTCFG_R_MSIX 20 + +#endif /* _VIRTIO_H_ */ diff --git a/usr.sbin/bhyve/xmsr.c b/usr.sbin/bhyve/xmsr.c new file mode 100644 index 0000000..931b7d7 --- /dev/null +++ b/usr.sbin/bhyve/xmsr.c @@ -0,0 +1,261 @@ +/*- + * Copyright (c) 2011 NetApp, Inc. + * All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * 1. Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * + * THIS SOFTWARE IS PROVIDED BY NETAPP, INC ``AS IS'' AND + * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE + * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE + * ARE DISCLAIMED. IN NO EVENT SHALL NETAPP, INC OR CONTRIBUTORS BE LIABLE + * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL + * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS + * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) + * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT + * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY + * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF + * SUCH DAMAGE. + * + * $FreeBSD$ + */ + +#include <sys/cdefs.h> +__FBSDID("$FreeBSD$"); + +#include <sys/param.h> +#include <machine/apicreg.h> + +#include <assert.h> +#include <stdio.h> +#include <stdlib.h> +#include <machine/vmm.h> +#include <vmmapi.h> + +#include "fbsdrun.h" +#include "xmsr.h" + +/* + * Trampoline for hypervisor direct 64-bit jump. + * + * 0 - signature for guest->host verification + * 8 - kernel virtual address of trampoline + * 16 - instruction virtual address + * 24 - stack pointer virtual address + * 32 - CR3, physical address of kernel page table + * 40 - 24-byte area for null/code/data GDT entries + */ +#define MP_V64T_SIG 0xcafebabecafebabeULL +struct mp_v64tramp { + uint64_t mt_sig; + uint64_t mt_virt; + uint64_t mt_eip; + uint64_t mt_rsp; + uint64_t mt_cr3; + uint64_t mt_gdtr[3]; +}; + +/* + * CPU 0 is considered to be the BSP and is set to the RUNNING state. + * All other CPUs are set up in the INIT state. + */ +#define BSP 0 +enum cpu_bstate { + CPU_S_INIT, + CPU_S_SIPI, + CPU_S_RUNNING +} static cpu_b[VM_MAXCPU] = { [BSP] = CPU_S_RUNNING }; + +static void spinup_ap(struct vmctx *, int, int, uint64_t *); +static void spinup_ap_direct64(struct vmctx *, int, uintptr_t, uint64_t *); + +int +emulate_wrmsr(struct vmctx *ctx, int vcpu, uint32_t code, uint64_t val) +{ + int dest; + int mode; + int thiscpu; + int vec; + int error, retval; + uint64_t rip; + + retval = vcpu; + thiscpu = 1 << vcpu; + + /* + * The only MSR value handled is the x2apic CR register + */ + if (code != 0x830) { + printf("Unknown WRMSR code %x, val %lx, cpu %d\n", + code, val, vcpu); + exit(1); + } + + /* + * The value written to the MSR will generate an IPI to + * a set of CPUs. If this is a SIPI, create the initial + * state for the CPU and switch to it. Otherwise, inject + * an interrupt for the destination CPU(s), and request + * a switch to the next available one by returning -1 + */ + dest = val >> 32; + vec = val & APIC_VECTOR_MASK; + mode = val & APIC_DELMODE_MASK; + + switch (mode) { + case APIC_DELMODE_INIT: + assert(dest != 0); + assert(dest < guest_ncpus); + + /* + * Ignore legacy de-assert INITs in x2apic mode + */ + if ((val & APIC_LEVEL_MASK) == APIC_LEVEL_DEASSERT) { + break; + } + assert(cpu_b[dest] == CPU_S_INIT); + + /* + * Move CPU to wait-for-SIPI state + */ + error = vcpu_reset(ctx, dest); + assert(error == 0); + + cpu_b[dest] = CPU_S_SIPI; + break; + + case APIC_DELMODE_STARTUP: + assert(dest != 0); + assert(dest < guest_ncpus); + /* + * Ignore SIPIs in any state other than wait-for-SIPI + */ + if (cpu_b[dest] != CPU_S_SIPI) { + break; + } + + /* + * Bring up the AP and signal the main loop that it is + * available and to switch to it. + */ + spinup_ap(ctx, dest, vec, &rip); + cpu_b[dest] = CPU_S_RUNNING; + fbsdrun_addcpu(ctx, dest, rip); + retval = dest; + break; + + default: + printf("APIC delivery mode %lx not supported!\n", + val & APIC_DELMODE_MASK); + exit(1); + } + + return (retval); +} + +/* + * There are 2 startup modes possible here: + * - if the CPU supports 'unrestricted guest' mode, the spinup can + * set up the processor state in power-on 16-bit mode, with the CS:IP + * init'd to the specified low-mem 4K page. + * - if the guest has requested a 64-bit trampoline in the low-mem 4K + * page by placing in the specified signature, set up the register + * state using register state in the signature. Note that this + * requires accessing guest physical memory to read the signature + * while 'unrestricted mode' does not. + */ +static void +spinup_ap(struct vmctx *ctx, int newcpu, int vector, uint64_t *rip) +{ + int error; + uint16_t cs; + uint64_t desc_base; + uint32_t desc_limit, desc_access; + + if (fbsdrun_vmexit_on_hlt()) { + error = vm_set_capability(ctx, newcpu, VM_CAP_HALT_EXIT, 1); + assert(error == 0); + } + + if (fbsdrun_vmexit_on_pause()) { + error = vm_set_capability(ctx, newcpu, VM_CAP_PAUSE_EXIT, 1); + assert(error == 0); + } + + error = vm_set_capability(ctx, newcpu, VM_CAP_UNRESTRICTED_GUEST, 1); + if (error) { + /* + * If the guest does not support real-mode execution then + * we will bring up the AP directly in 64-bit mode. + */ + spinup_ap_direct64(ctx, newcpu, vector << PAGE_SHIFT, rip); + } else { + /* + * Update the %cs and %rip of the guest so that it starts + * executing real mode code at at 'vector << 12'. + */ + *rip = 0; + error = vm_set_register(ctx, newcpu, VM_REG_GUEST_RIP, *rip); + assert(error == 0); + + error = vm_get_desc(ctx, newcpu, VM_REG_GUEST_CS, &desc_base, + &desc_limit, &desc_access); + assert(error == 0); + + desc_base = vector << PAGE_SHIFT; + error = vm_set_desc(ctx, newcpu, VM_REG_GUEST_CS, + desc_base, desc_limit, desc_access); + assert(error == 0); + + cs = (vector << PAGE_SHIFT) >> 4; + error = vm_set_register(ctx, newcpu, VM_REG_GUEST_CS, cs); + assert(error == 0); + } +} + +static void +spinup_ap_direct64(struct vmctx *ctx, int newcpu, uintptr_t gaddr, + uint64_t *rip) +{ + struct mp_v64tramp *mvt; + char *errstr; + int error; + uint64_t gdtbase; + + mvt = paddr_guest2host(gaddr); + + assert(mvt->mt_sig == MP_V64T_SIG); + + /* + * Set up the 3-entry GDT using memory supplied in the + * guest's trampoline structure. + */ + vm_setup_freebsd_gdt(mvt->mt_gdtr); + +#define CHECK_ERROR(msg) \ + if (error != 0) { \ + errstr = msg; \ + goto err_exit; \ + } + + /* entry point */ + *rip = mvt->mt_eip; + + /* Get the guest virtual address of the GDT */ + gdtbase = mvt->mt_virt + __offsetof(struct mp_v64tramp, mt_gdtr); + + error = vm_setup_freebsd_registers(ctx, newcpu, mvt->mt_eip, + mvt->mt_cr3, gdtbase, mvt->mt_rsp); + CHECK_ERROR("vm_setup_freebsd_registers"); + + return; +err_exit: + printf("spinup_ap_direct64: machine state error: %s", errstr); + exit(1); +} diff --git a/usr.sbin/bhyve/xmsr.h b/usr.sbin/bhyve/xmsr.h new file mode 100644 index 0000000..8cebcea --- /dev/null +++ b/usr.sbin/bhyve/xmsr.h @@ -0,0 +1,34 @@ +/*- + * Copyright (c) 2011 NetApp, Inc. + * All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * 1. Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * + * THIS SOFTWARE IS PROVIDED BY NETAPP, INC ``AS IS'' AND + * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE + * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE + * ARE DISCLAIMED. IN NO EVENT SHALL NETAPP, INC OR CONTRIBUTORS BE LIABLE + * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL + * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS + * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) + * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT + * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY + * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF + * SUCH DAMAGE. + * + * $FreeBSD$ + */ + +#ifndef _XMSR_H_ +#define _XMSR_H_ + +int emulate_wrmsr(struct vmctx *ctx, int vcpu, uint32_t code, uint64_t val); + +#endif |