mirror of
https://gitlab.com/qemu-project/qemu
synced 2024-11-05 20:35:44 +00:00
b57ed9bf07
Verify that the virtio-ccw notify hypercall passed a reasonable value for queue. Cc: qemu-stable@nongnu.org Reported-by: Alexander Graf <agraf@suse.de> Signed-off-by: Cornelia Huck <cornelia.huck@de.ibm.com>
137 lines
3.6 KiB
C
137 lines
3.6 KiB
C
/*
|
|
* virtio ccw machine
|
|
*
|
|
* Copyright 2012 IBM Corp.
|
|
* Author(s): Cornelia Huck <cornelia.huck@de.ibm.com>
|
|
*
|
|
* 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 "hw/s390x/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;
|
|
}
|
|
if (queue >= VIRTIO_PCI_QUEUE_MAX) {
|
|
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)
|