linux/tools/testing/selftests/kvm/include/x86_64/hyperv.h, branch master

KVM: selftests: Use canonical $(ARCH) paths for KVM selftests directories

2024-12-18T22:15:04Z

Use the kernel's canonical $(ARCH) paths instead of the raw target triple for KVM selftests directories. KVM selftests are quite nearly the only place in the entire kernel that using the target triple for directories, tools/testing/selftests/drivers/s390x being the lone holdout. Using the kernel's preferred nomenclature eliminates the minor, but annoying, friction of having to translate to KVM's selftests directories, e.g. for pattern matching, opening files, running selftests, etc. Opportunsitically delete file comments that reference the full path of the file, as they are obviously prone to becoming stale, and serve no known purpose. Reviewed-by: Muhammad Usama Anjum Acked-by: Claudio Imbrenda Acked-by: Andrew Jones Link: https://lore.kernel.org/r/20241128005547.4077116-16-seanjc@google.com Signed-off-by: Sean Christopherson

KVM: selftests: Re-enable hyperv_evmcs/hyperv_svm_test on bare metal

2024-08-22T19:14:42Z

KVM_CAP_HYPERV_DIRECT_TLBFLUSH is only reported when KVM runs on top of Hyper-V and hyperv_evmcs/hyperv_svm_test don't need that, these tests check that the feature is properly emulated for Hyper-V on KVM guests. There's no corresponding CAP for that, the feature is reported in KVM_GET_SUPPORTED_HV_CPUID. Hyper-V specific CPUIDs are not reported by KVM_GET_SUPPORTED_CPUID, implement dedicated kvm_hv_cpu_has() helper to do the job. Fixes: 6dac1195181c ("KVM: selftests: Make Hyper-V tests explicitly require KVM Hyper-V support") Signed-off-by: Vitaly Kuznetsov Link: https://lore.kernel.org/r/20240816130139.286246-3-vkuznets@redhat.com Signed-off-by: Sean Christopherson

KVM: selftests: Move Hyper-V specific functions out of processor.c

2024-08-22T19:14:42Z

Since there is 'hyperv.c' for Hyper-V specific functions already, move Hyper-V specific functions out of processor.c there. No functional change intended. Signed-off-by: Vitaly Kuznetsov Link: https://lore.kernel.org/r/20240816130139.286246-2-vkuznets@redhat.com Signed-off-by: Sean Christopherson

KVM: selftests: Test Hyper-V extended hypercall enablement

2023-02-01T21:46:24Z

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 Link: https://lore.kernel.org/r/20221212183720.4062037-11-vipinsh@google.com Signed-off-by: Sean Christopherson

KVM: selftests: Test Hyper-V invariant TSC control

2022-12-29T20:33:33Z

Add a test for the newly introduced Hyper-V invariant TSC control feature: - HV_X64_MSR_TSC_INVARIANT_CONTROL is not available without HV_ACCESS_TSC_INVARIANT CPUID bit set and available with it. - BIT(0) of HV_X64_MSR_TSC_INVARIANT_CONTROL controls the filtering of architectural invariant TSC (CPUID.80000007H:EDX[8]) bit. Signed-off-by: Vitaly Kuznetsov Reviewed-by: Sean Christopherson Message-Id: <20221013095849.705943-8-vkuznets@redhat.com> Signed-off-by: Paolo Bonzini

KVM: selftests: Convert hyperv_features test to using KVM_X86_CPU_FEATURE()

2022-12-29T20:33:31Z

hyperv_features test needs to set certain CPUID bits in Hyper-V feature leaves but instead of open coding this, common KVM_X86_CPU_FEATURE() infrastructure can be used. Signed-off-by: Vitaly Kuznetsov Reviewed-by: Sean Christopherson Message-Id: <20221013095849.705943-6-vkuznets@redhat.com> Signed-off-by: Paolo Bonzini

KVM: selftests: Allocate Hyper-V partition assist page

2022-11-21T11:41:59Z

In preparation to testing Hyper-V L2 TLB flush hypercalls, allocate so-called Partition assist page. Reviewed-by: Sean Christopherson Signed-off-by: Vitaly Kuznetsov Signed-off-by: Paolo Bonzini Message-Id: <20221101145426.251680-44-vkuznets@redhat.com> Signed-off-by: Paolo Bonzini

KVM: selftests: Create a vendor independent helper to allocate Hyper-V specific test pages

2022-11-21T11:41:22Z

There's no need to pollute VMX and SVM code with Hyper-V specific stuff and allocate Hyper-V specific test pages for all test as only few really need them. Create a dedicated struct and an allocation helper. Reviewed-by: Sean Christopherson Signed-off-by: Vitaly Kuznetsov Signed-off-by: Paolo Bonzini Message-Id: <20221101145426.251680-43-vkuznets@redhat.com> Signed-off-by: Paolo Bonzini

KVM: selftests: Move Hyper-V VP assist page enablement out of evmcs.h

2022-11-21T11:40:05Z

Hyper-V VP assist page is not eVMCS specific, it is also used for enlightened nSVM. Move the code to vendor neutral place. Reviewed-by: Maxim Levitsky Reviewed-by: Sean Christopherson Signed-off-by: Vitaly Kuznetsov Signed-off-by: Paolo Bonzini Message-Id: <20221101145426.251680-41-vkuznets@redhat.com> Signed-off-by: Paolo Bonzini

KVM: selftests: Hyper-V PV TLB flush selftest

2022-11-21T11:40:01Z

Introduce a selftest for Hyper-V PV TLB flush hypercalls (HvFlushVirtualAddressSpace/HvFlushVirtualAddressSpaceEx, HvFlushVirtualAddressList/HvFlushVirtualAddressListEx). The test creates one 'sender' vCPU and two 'worker' vCPU which do busy loop reading from a certain GVA checking the observed value. Sender vCPU swaos the data page with another page filled with a different value. The expectation for workers is also altered. Without TLB flush on worker vCPUs, they may continue to observe old value. To guard against accidental TLB flushes for worker vCPUs the test is repeated 100 times. Hyper-V TLB flush hypercalls are tested in both 'normal' and 'XMM fast' modes. Reviewed-by: Sean Christopherson Signed-off-by: Vitaly Kuznetsov Signed-off-by: Paolo Bonzini Message-Id: <20221101145426.251680-38-vkuznets@redhat.com> Signed-off-by: Paolo Bonzini