Commit c4a46627 authored by Vipin Sharma's avatar Vipin Sharma Committed by Sean Christopherson
Browse files

KVM: selftests: Test Hyper-V extended hypercall enablement 



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: default avatarVipin Sharma <vipinsh@google.com>
Link: https://lore.kernel.org/r/20221212183720.4062037-11-vipinsh@google.com


Signed-off-by: default avatarSean Christopherson <seanjc@google.com>
parent db9cf24c

tools/testing/selftests/kvm/include/x86_64/hyperv.h

+5 −0
Original line number Diff line number Diff line
@@ -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)

tools/testing/selftests/kvm/x86_64/hyperv_features.c

+9 −0
Original line number Diff line number Diff line
@@ -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;

		}