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| author |  Paolo Bonzini <pbonzini@redhat.com>
| 2022-01-26 07:51:00 -0500 |
|---|---|---|
| committer | Paolo Bonzini <pbonzini@redhat.com>
| 2022-01-28 07:38:25 -0500 |
| commit | b19c99b9f4486f23e3b7248dd4ce3d83e19b9032 (patch) | |
| tree | 234787d7541cc23e3c1949ddbe91891c77d297f5 | |
| parent | KVM: x86: add system attribute to retrieve full set of supported xsave states (diff) | |
| download | linux-b19c99b9f4486f23e3b7248dd4ce3d83e19b9032.tar.gz linux-b19c99b9f4486f23e3b7248dd4ce3d83e19b9032.tar.bz2 linux-b19c99b9f4486f23e3b7248dd4ce3d83e19b9032.zip | |
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>
| -rw-r--r-- | tools/arch/x86/include/uapi/asm/kvm.h | 3 | ||||
| -rw-r--r-- | tools/include/uapi/linux/kvm.h | 1 | ||||
| -rw-r--r-- | tools/testing/selftests/kvm/lib/x86_64/processor.c | 15 |
3 files changed, 19 insertions, 0 deletions
diff --git a/tools/arch/x86/include/uapi/asm/kvm.h b/tools/arch/x86/include/uapi/asm/kvm.h index 2da3316bb559..bf6e96011dfe 100644 --- a/tools/arch/x86/include/uapi/asm/kvm.h +++ b/tools/arch/x86/include/uapi/asm/kvm.h @@ -452,6 +452,9 @@ struct kvm_sync_regs { #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 { __u8 vmcs12[KVM_STATE_NESTED_VMX_VMCS_SIZE]; __u8 shadow_vmcs12[KVM_STATE_NESTED_VMX_VMCS_SIZE]; diff --git a/tools/include/uapi/linux/kvm.h b/tools/include/uapi/linux/kvm.h index 9563d294f181..b46bcdb0cab1 100644 --- a/tools/include/uapi/linux/kvm.h +++ b/tools/include/uapi/linux/kvm.h @@ -1133,6 +1133,7 @@ struct kvm_ppc_resize_hpt { #define KVM_CAP_VM_MOVE_ENC_CONTEXT_FROM 206 #define KVM_CAP_VM_GPA_BITS 207 #define KVM_CAP_XSAVE2 208 +#define KVM_CAP_SYS_ATTRIBUTES 209 #ifdef KVM_CAP_IRQ_ROUTING diff --git a/tools/testing/selftests/kvm/lib/x86_64/processor.c b/tools/testing/selftests/kvm/lib/x86_64/processor.c index c1d1c195a838..9f000dfb5594 100644 --- a/tools/testing/selftests/kvm/lib/x86_64/processor.c +++ b/tools/testing/selftests/kvm/lib/x86_64/processor.c @@ -667,8 +667,23 @@ static bool is_xfd_supported(void) void vm_xsave_req_perm(int bit) { + int kvm_fd; u64 bitmask; 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()) exit(KSFT_SKIP); |