kernel/tools/testing/selftests/kvm/x86/hyperv_cpuid.c, branch linux-rolling-stable

KVM: selftests: Fix typo in hyperv cpuid test message

2025-09-08T20:03:22Z

Fix a typo in hyperv_cpuid.c test assertion log: replace "our of supported range" -> "out of supported range". Signed-off-by: Alok Tiwari Link: https://lore.kernel.org/r/20250824181642.629297-1-alok.a.tiwari@oracle.com Signed-off-by: Sean Christopherson

KVM: selftests: Add SMT control state helper

2025-05-02T19:32:33Z

Move the SMT control check out of the hyperv_cpuid selftest so that it is generally accessible all KVM selftests. Split the functionality into a helper that populates a buffer with SMT control value which other helpers can use to ascertain if SMT state is available and active. Signed-off-by: Pratik R. Sampat Link: https://lore.kernel.org/r/20250305230000.231025-5-prsampat@amd.com [sean: prepend is_ to the helpers] Signed-off-by: Sean Christopherson

KVM: selftests: Add CPUID tests for Hyper-V features that need in-kernel APIC

2025-02-12T16:55:11Z

Add testcases to x86's Hyper-V CPUID test to verify that KVM advertises support for features that require an in-kernel local APIC appropriately, i.e. that KVM hides support from the vCPU-scoped ioctl if the VM doesn't have an in-kernel local APIC. Cc: Vitaly Kuznetsov Reviewed-by: Vitaly Kuznetsov Link: https://lore.kernel.org/r/20250118003454.2619573-5-seanjc@google.com Signed-off-by: Sean Christopherson

KVM: selftests: Manage CPUID array in Hyper-V CPUID test's core helper

2025-02-12T16:53:59Z

Allocate, get, and free the CPUID array in the Hyper-V CPUID test in the test's core helper, instead of copy+pasting code at each call site. In addition to deduplicating a small amount of code, restricting visibility of the array to a single invocation of the core test prevents "leaking" an array across test cases. Passing in @vcpu to the helper will also allow pivoting on VM-scoped information without needing to pass more booleans, e.g. to conditionally assert on features that require an in-kernel APIC. To avoid use-after-free bugs due to overzealous and careless developers, opportunstically add a comment to explain that the system-scoped helper caches the Hyper-V CPUID entries, i.e. that the caller is not responsible for freeing the memory. Cc: Vitaly Kuznetsov Reviewed-by: Vitaly Kuznetsov Link: https://lore.kernel.org/r/20250118003454.2619573-4-seanjc@google.com Signed-off-by: Sean Christopherson

KVM: selftests: Mark test_hv_cpuid_e2big() static in Hyper-V CPUID test

2025-02-12T16:53:57Z

Make the Hyper-V CPUID test's local helper test_hv_cpuid_e2big() static, it's not used outside of the test (and isn't intended to be). Reviewed-by: Vitaly Kuznetsov Link: https://lore.kernel.org/r/20250118003454.2619573-3-seanjc@google.com Signed-off-by: Sean Christopherson

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