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accel/mshv: store partition proc features

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We retrieve and store processor features on the state, so we can query
them later when deciding which MSRs to migrate.

Signed-off-by: Magnus Kulke <magnuskulke@linux.microsoft.com>
Link: https://lore.kernel.org/r/20260417105618.3621-19-magnuskulke@linux.microsoft.com
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
This commit is contained in:
Magnus Kulke
2026-04-17 12:56:02 +02:00
committed by Paolo Bonzini
parent f2230f044d
commit e624d93f33
3 changed files with 61 additions and 1 deletions
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57
accel/mshv/mshv-all.c
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@@ -133,6 +133,57 @@ static int get_host_partition_property(int mshv_fd, uint32_t property_code,
return 0;
}
static int get_partition_property(int vm_fd, uint32_t feature_bank,
uint64_t *value)
{
struct hv_input_get_partition_property in = {0};
struct hv_output_get_partition_property out = {0};
struct mshv_root_hvcall args = {0};
int ret;
in.property_code = feature_bank;
args.code = HVCALL_GET_PARTITION_PROPERTY;
args.in_sz = sizeof(in);
args.in_ptr = (uint64_t)&in;
args.out_sz = sizeof(out);
args.out_ptr = (uint64_t)&out;
ret = ioctl(vm_fd, MSHV_ROOT_HVCALL, &args);
if (ret < 0) {
error_report("Failed to get guest partition property bank: %s",
strerror(errno));
return -1;
}
*value = out.property_value;
return 0;
}
static int get_proc_features(int vm_fd,
union hv_partition_processor_features *features)
{
int ret;
ret = get_partition_property(vm_fd,
HV_PARTITION_PROPERTY_PROCESSOR_FEATURES0,
features[0].as_uint64);
if (ret < 0) {
error_report("Failed to get processor features bank 0");
return -1;
}
ret = get_partition_property(vm_fd,
HV_PARTITION_PROPERTY_PROCESSOR_FEATURES1,
features[1].as_uint64);
if (ret < 0) {
error_report("Failed to get processor features bank 1");
return -1;
}
return 0;
}
static int create_partition(int mshv_fd, int *vm_fd)
{
int ret;
@@ -520,6 +571,12 @@ static int mshv_init(AccelState *as, MachineState *ms)
s->vm = vm_fd;
s->fd = mshv_fd;
ret = get_proc_features(vm_fd, &s->processor_features);
if (ret < 0) {
return -1;
}
s->nr_as = 1;
s->as = g_new0(MshvAddressSpace, s->nr_as);