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selftests: kvm: check dynamic bits against KVM_X86_XCOMP_GUEST_SUPP 

Provide coverage for the new API.

Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
This commit is contained in:
Paolo Bonzini 2022-01-26 07:51:00 -05:00
parent dd6e631220
commit b19c99b9f4
3 changed files with 19 additions and 0 deletions
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3
tools/arch/x86/include/uapi/asm/kvm.h
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@ -452,6 +452,9 @@ struct kvm_sync_regs {
#define KVM_STATE_VMX_PREEMPTION_TIMER_DEADLINE 0x00000001 #define KVM_STATE_VMX_PREEMPTION_TIMER_DEADLINE 0x00000001
/* attributes for system fd (group 0) */
#define KVM_X86_XCOMP_GUEST_SUPP 0
struct kvm_vmx_nested_state_data { struct kvm_vmx_nested_state_data {
__u8 vmcs12[KVM_STATE_NESTED_VMX_VMCS_SIZE]; __u8 vmcs12[KVM_STATE_NESTED_VMX_VMCS_SIZE];
__u8 shadow_vmcs12[KVM_STATE_NESTED_VMX_VMCS_SIZE]; __u8 shadow_vmcs12[KVM_STATE_NESTED_VMX_VMCS_SIZE];

1
tools/include/uapi/linux/kvm.h
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@ -1133,6 +1133,7 @@ struct kvm_ppc_resize_hpt {
#define KVM_CAP_VM_MOVE_ENC_CONTEXT_FROM 206 #define KVM_CAP_VM_MOVE_ENC_CONTEXT_FROM 206
#define KVM_CAP_VM_GPA_BITS 207 #define KVM_CAP_VM_GPA_BITS 207
#define KVM_CAP_XSAVE2 208 #define KVM_CAP_XSAVE2 208
#define KVM_CAP_SYS_ATTRIBUTES 209
#ifdef KVM_CAP_IRQ_ROUTING #ifdef KVM_CAP_IRQ_ROUTING

15
tools/testing/selftests/kvm/lib/x86_64/processor.c
View File

@ -667,8 +667,23 @@ static bool is_xfd_supported(void)
void vm_xsave_req_perm(int bit) void vm_xsave_req_perm(int bit)
{ {
int kvm_fd;
u64 bitmask; u64 bitmask;
long rc; long rc;
struct kvm_device_attr attr = {
.group = 0,
.attr = KVM_X86_XCOMP_GUEST_SUPP,
.addr = (unsigned long) &bitmask
};
kvm_fd = open_kvm_dev_path_or_exit();
rc = ioctl(kvm_fd, KVM_GET_DEVICE_ATTR, &attr);
close(kvm_fd);
if (rc == -1 && (errno == ENXIO || errno == EINVAL))
exit(KSFT_SKIP);
TEST_ASSERT(rc == 0, "KVM_GET_DEVICE_ATTR(0, KVM_X86_XCOMP_GUEST_SUPP) error: %ld", rc);
if (!(bitmask & (1ULL << bit)))
exit(KSFT_SKIP);
if (!is_xfd_supported()) if (!is_xfd_supported())
exit(KSFT_SKIP); exit(KSFT_SKIP);