From a5c95808bac7d995378b3835e10011775c7c2d0b Mon Sep 17 00:00:00 2001 From: Cornelia Huck Date: Thu, 24 Jan 2013 06:08:56 +0000 Subject: s390: Add s390-ccw-virtio machine. Add a new machine type, s390-ccw-virtio, making use of the virtio-ccw transport to present virtio devices as channel devices. Signed-off-by: Cornelia Huck Signed-off-by: Alexander Graf --- hw/s390x/Makefile.objs | 1 + hw/s390x/s390-virtio-ccw.c | 134 +++++++++++++++++++++++++++++++++++++++++++++ hw/s390x/s390-virtio.h | 1 + 3 files changed, 136 insertions(+) create mode 100644 hw/s390x/s390-virtio-ccw.c (limited to 'hw/s390x') diff --git a/hw/s390x/Makefile.objs b/hw/s390x/Makefile.objs index e4ee456..9f2f419 100644 --- a/hw/s390x/Makefile.objs +++ b/hw/s390x/Makefile.objs @@ -5,4 +5,5 @@ obj-y += event-facility.o obj-y += sclpquiesce.o sclpconsole.o obj-y += ipl.o obj-y += css.o +obj-y += s390-virtio-ccw.o obj-y += virtio-ccw.o diff --git a/hw/s390x/s390-virtio-ccw.c b/hw/s390x/s390-virtio-ccw.c new file mode 100644 index 0000000..6549211 --- /dev/null +++ b/hw/s390x/s390-virtio-ccw.c @@ -0,0 +1,134 @@ +/* + * virtio ccw machine + * + * Copyright 2012 IBM Corp. + * Author(s): Cornelia Huck + * + * This work is licensed under the terms of the GNU GPL, version 2 or (at + * your option) any later version. See the COPYING file in the top-level + * directory. + */ + +#include "hw/boards.h" +#include "exec/address-spaces.h" +#include "s390-virtio.h" +#include "sclp.h" +#include "ioinst.h" +#include "css.h" +#include "virtio-ccw.h" + +static int virtio_ccw_hcall_notify(const uint64_t *args) +{ + uint64_t subch_id = args[0]; + uint64_t queue = args[1]; + SubchDev *sch; + int cssid, ssid, schid, m; + + if (ioinst_disassemble_sch_ident(subch_id, &m, &cssid, &ssid, &schid)) { + return -EINVAL; + } + sch = css_find_subch(m, cssid, ssid, schid); + if (!sch || !css_subch_visible(sch)) { + return -EINVAL; + } + virtio_queue_notify(virtio_ccw_get_vdev(sch), queue); + return 0; + +} + +static int virtio_ccw_hcall_early_printk(const uint64_t *args) +{ + uint64_t mem = args[0]; + + if (mem < ram_size) { + /* Early printk */ + return 0; + } + return -EINVAL; +} + +static void virtio_ccw_register_hcalls(void) +{ + s390_register_virtio_hypercall(KVM_S390_VIRTIO_CCW_NOTIFY, + virtio_ccw_hcall_notify); + /* Tolerate early printk. */ + s390_register_virtio_hypercall(KVM_S390_VIRTIO_NOTIFY, + virtio_ccw_hcall_early_printk); +} + +static void ccw_init(QEMUMachineInitArgs *args) +{ + ram_addr_t my_ram_size = args->ram_size; + MemoryRegion *sysmem = get_system_memory(); + MemoryRegion *ram = g_new(MemoryRegion, 1); + int shift = 0; + uint8_t *storage_keys; + int ret; + VirtualCssBus *css_bus; + + /* s390x ram size detection needs a 16bit multiplier + an increment. So + guests > 64GB can be specified in 2MB steps etc. */ + while ((my_ram_size >> (20 + shift)) > 65535) { + shift++; + } + my_ram_size = my_ram_size >> (20 + shift) << (20 + shift); + + /* lets propagate the changed ram size into the global variable. */ + ram_size = my_ram_size; + + /* get a BUS */ + css_bus = virtual_css_bus_init(); + s390_sclp_init(); + s390_init_ipl_dev(args->kernel_filename, args->kernel_cmdline, + args->initrd_filename); + + /* register hypercalls */ + virtio_ccw_register_hcalls(); + + /* allocate RAM */ + memory_region_init_ram(ram, "s390.ram", my_ram_size); + vmstate_register_ram_global(ram); + memory_region_add_subregion(sysmem, 0, ram); + + /* allocate storage keys */ + storage_keys = g_malloc0(my_ram_size / TARGET_PAGE_SIZE); + + /* init CPUs */ + s390_init_cpus(args->cpu_model, storage_keys); + + if (kvm_enabled()) { + kvm_s390_enable_css_support(s390_cpu_addr2state(0)); + } + /* + * Create virtual css and set it as default so that non mcss-e + * enabled guests only see virtio devices. + */ + ret = css_create_css_image(VIRTUAL_CSSID, true); + assert(ret == 0); + + /* Create VirtIO network adapters */ + s390_create_virtio_net(BUS(css_bus), "virtio-net-ccw"); +} + +static QEMUMachine ccw_machine = { + .name = "s390-ccw-virtio", + .alias = "s390-ccw", + .desc = "VirtIO-ccw based S390 machine", + .init = ccw_init, + .block_default_type = IF_VIRTIO, + .no_cdrom = 1, + .no_floppy = 1, + .no_serial = 1, + .no_parallel = 1, + .no_sdcard = 1, + .use_sclp = 1, + .max_cpus = 255, + DEFAULT_MACHINE_OPTIONS, +}; + +static void ccw_machine_init(void) +{ + qemu_register_machine(&ccw_machine); +} + +machine_init(ccw_machine_init) diff --git a/hw/s390x/s390-virtio.h b/hw/s390x/s390-virtio.h index 67bfd20..a6c4c19 100644 --- a/hw/s390x/s390-virtio.h +++ b/hw/s390x/s390-virtio.h @@ -15,6 +15,7 @@ #define KVM_S390_VIRTIO_NOTIFY 0 #define KVM_S390_VIRTIO_RESET 1 #define KVM_S390_VIRTIO_SET_STATUS 2 +#define KVM_S390_VIRTIO_CCW_NOTIFY 3 typedef int (*s390_virtio_fn)(const uint64_t *args); void s390_register_virtio_hypercall(uint64_t code, s390_virtio_fn fn); -- cgit v1.1