diff options
Diffstat (limited to 'sys/amd64/vmm/vmm_lapic.c')
| -rw-r--r-- | sys/amd64/vmm/vmm_lapic.c | 201 |
1 files changed, 201 insertions, 0 deletions
diff --git a/sys/amd64/vmm/vmm_lapic.c b/sys/amd64/vmm/vmm_lapic.c new file mode 100644 index 0000000..d024b71 --- /dev/null +++ b/sys/amd64/vmm/vmm_lapic.c @@ -0,0 +1,201 @@ +/*- + * 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/systm.h> +#include <sys/smp.h> + +#include <x86/specialreg.h> +#include <x86/apicreg.h> + +#include <machine/vmm.h> +#include "vmm_ipi.h" +#include "vmm_lapic.h" +#include "vlapic.h" + +int +lapic_pending_intr(struct vm *vm, int cpu) +{ + struct vlapic *vlapic; + + vlapic = vm_lapic(vm, cpu); + + return (vlapic_pending_intr(vlapic)); +} + +void +lapic_intr_accepted(struct vm *vm, int cpu, int vector) +{ + struct vlapic *vlapic; + + vlapic = vm_lapic(vm, cpu); + + vlapic_intr_accepted(vlapic, vector); +} + +int +lapic_set_intr(struct vm *vm, int cpu, int vector) +{ + struct vlapic *vlapic; + + if (cpu < 0 || cpu >= VM_MAXCPU) + return (EINVAL); + + if (vector < 32 || vector > 255) + return (EINVAL); + + vlapic = vm_lapic(vm, cpu); + vlapic_set_intr_ready(vlapic, vector); + + vm_interrupt_hostcpu(vm, cpu); + + return (0); +} + +int +lapic_timer_tick(struct vm *vm, int cpu) +{ + struct vlapic *vlapic; + + vlapic = vm_lapic(vm, cpu); + + return (vlapic_timer_tick(vlapic)); +} + +static boolean_t +x2apic_msr(u_int msr) +{ + if (msr >= 0x800 && msr <= 0xBFF) + return (TRUE); + else + return (FALSE); +} + +static u_int +x2apic_msr_to_regoff(u_int msr) +{ + + return ((msr - 0x800) << 4); +} + +boolean_t +lapic_msr(u_int msr) +{ + + if (x2apic_msr(msr) || (msr == MSR_APICBASE)) + return (TRUE); + else + return (FALSE); +} + +int +lapic_rdmsr(struct vm *vm, int cpu, u_int msr, uint64_t *rval) +{ + int error; + u_int offset; + struct vlapic *vlapic; + + vlapic = vm_lapic(vm, cpu); + + if (msr == MSR_APICBASE) { + *rval = vlapic_get_apicbase(vlapic); + error = 0; + } else { + offset = x2apic_msr_to_regoff(msr); + error = vlapic_op_mem_read(vlapic, offset, DWORD, rval); + } + + return (error); +} + +int +lapic_wrmsr(struct vm *vm, int cpu, u_int msr, uint64_t val) +{ + int error; + u_int offset; + struct vlapic *vlapic; + + vlapic = vm_lapic(vm, cpu); + + if (msr == MSR_APICBASE) { + vlapic_set_apicbase(vlapic, val); + error = 0; + } else { + offset = x2apic_msr_to_regoff(msr); + error = vlapic_op_mem_write(vlapic, offset, DWORD, val); + } + + return (error); +} + +int +lapic_mmio_write(void *vm, int cpu, uint64_t gpa, uint64_t wval, int size, + void *arg) +{ + int error; + uint64_t off; + struct vlapic *vlapic; + + off = gpa - DEFAULT_APIC_BASE; + + /* + * Memory mapped local apic accesses must be 4 bytes wide and + * aligned on a 16-byte boundary. + */ + if (size != 4 || off & 0xf) + return (EINVAL); + + vlapic = vm_lapic(vm, cpu); + error = vlapic_op_mem_write(vlapic, off, DWORD, wval); + return (error); +} + +int +lapic_mmio_read(void *vm, int cpu, uint64_t gpa, uint64_t *rval, int size, + void *arg) +{ + int error; + uint64_t off; + struct vlapic *vlapic; + + off = gpa - DEFAULT_APIC_BASE; + + /* + * Memory mapped local apic accesses must be 4 bytes wide and + * aligned on a 16-byte boundary. + */ + if (size != 4 || off & 0xf) + return (EINVAL); + + vlapic = vm_lapic(vm, cpu); + error = vlapic_op_mem_read(vlapic, off, DWORD, rval); + return (error); +} |
