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KVM: selftests: Test Hyper-V extended hypercall enablement

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Test Hyper-V extended hypercall, HV_EXT_CALL_QUERY_CAPABILITIES
(0x8001), access denied and invalid parameter cases.

Access is denied if CPUID.0x40000003.EBX BIT(20) is not set.
Invalid parameter if call has fast bit set.

Signed-off-by: Vipin Sharma <vipinsh@google.com>
Link: https://lore.kernel.org/r/20221212183720.4062037-11-vipinsh@google.com
Signed-off-by: Sean Christopherson <seanjc@google.com>
This commit is contained in:
Vipin Sharma 2022-12-12 10:37:17 -08:00 committed by Sean Christopherson
parent db9cf24cea
commit c4a46627e5
2 changed files with 14 additions and 0 deletions
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5
tools/testing/selftests/kvm/include/x86_64/hyperv.h
View File

@ -137,6 +137,8 @@
KVM_X86_CPU_FEATURE(HYPERV_CPUID_FEATURES, 0, EBX, 11)
#define HV_CPU_MANAGEMENT \
KVM_X86_CPU_FEATURE(HYPERV_CPUID_FEATURES, 0, EBX, 12)
#define HV_ENABLE_EXTENDED_HYPERCALLS \
KVM_X86_CPU_FEATURE(HYPERV_CPUID_FEATURES, 0, EBX, 20)
#define HV_ISOLATION \
KVM_X86_CPU_FEATURE(HYPERV_CPUID_FEATURES, 0, EBX, 22)
@ -213,6 +215,9 @@
#define HVCALL_FLUSH_GUEST_PHYSICAL_ADDRESS_SPACE 0x00af
#define HVCALL_FLUSH_GUEST_PHYSICAL_ADDRESS_LIST 0x00b0
/* Extended hypercalls */
#define HV_EXT_CALL_QUERY_CAPABILITIES 0x8001
#define HV_FLUSH_ALL_PROCESSORS BIT(0)
#define HV_FLUSH_ALL_VIRTUAL_ADDRESS_SPACES BIT(1)
#define HV_FLUSH_NON_GLOBAL_MAPPINGS_ONLY BIT(2)

9
tools/testing/selftests/kvm/x86_64/hyperv_features.c
View File

@ -649,6 +649,15 @@ static void guest_test_hcalls_access(void)
hcall->expect = HV_STATUS_SUCCESS;
break;
case 19:
hcall->control = HV_EXT_CALL_QUERY_CAPABILITIES;
hcall->expect = HV_STATUS_ACCESS_DENIED;
break;
case 20:
vcpu_set_cpuid_feature(vcpu, HV_ENABLE_EXTENDED_HYPERCALLS);
hcall->control = HV_EXT_CALL_QUERY_CAPABILITIES | HV_HYPERCALL_FAST_BIT;
hcall->expect = HV_STATUS_INVALID_PARAMETER;
break;
case 21:
kvm_vm_free(vm);
return;
}