kernel/linux.git/tools/testing/selftests/kvm, branch v7.1-rc5

KVM: selftests: Verify that KVM returns the configured APIC cycle length

2026-05-23T08:07:40+00:00

Add checks in the APIC bus clock test to verify that querying KVM_CAP_X86_APIC_BUS_CYCLES_NS on the VM after changing the frequency returns the VM's actual APIC cycle length, not KVM's default. For giggles, verify that KVM still returns its default frequency for the system-scoped check. Signed-off-by: Sean Christopherson Message-ID: <20260522173526.3539407-3-seanjc@google.com> Signed-off-by: Paolo Bonzini

KVM: selftests: elf: Include instead of

2026-05-23T08:05:26+00:00

is a glibc-internal header that explicitly states it should never be included directly: #error "Never use directly; include instead." Replace it with the correct public header which works on all C libraries including musl. Building KVM selftests with musl-gcc fails with: lib/elf.c:10:10: fatal error: bits/endian.h: No such file or directory Fixes: 6089ae0bd5e1 ("kvm: selftests: add sync_regs_test") Signed-off-by: Hisam Mehboob Message-ID: <20260409164020.1575176-4-hisamshar@gmail.com> Signed-off-by: Paolo Bonzini

KVM: selftests: Ensure gmem file sizes are multiple of host page size

2026-05-12T20:26:10+00:00

When creating a guest_memfd file and associated memslot to validate shared guest memory, size the file+memslot to the maximum of the host or guest page size. Attempting to allocate a single guest page will fail if the host page size is greater than the guest page size, as KVM requires that the size of memslots and guest_memfd files are a multiple of the host page size. For simplicity, verify the entire file can be shared between guest and host, e.g. instead of trying to validate "partial" mappings. Fixes: 42188667be38 ("KVM: selftests: Add guest_memfd testcase to fault-in on !mmap()'d memory") Reported-by: Zenghui Yu Closes: https://lore.kernel.org/all/0064952b-048c-455d-ad89-e27e5cb82591@linux.dev Signed-off-by: Sean Christopherson Message-ID: <20260512155634.772602-1-seanjc@google.com> Signed-off-by: Paolo Bonzini

KVM: selftests: arm64: Fix steal_time test after UAPI refactoring

2026-05-06T16:09:03+00:00

Fix the following failure to the steal_time test on arm64 by making the timer address known to the guest. ==== Test Assertion Failure ==== steal_time.c:229: !ret pid=18514 tid=18514 errno=22 - Invalid argument 1 0x000000000040252f: check_steal_time_uapi at steal_time.c:229 (discriminator 20) 2 (inlined by) main at steal_time.c:537 (discriminator 20) 3 0x0000ffffa23d621b: ?? ??:0 4 0x0000ffffa23d62fb: ?? ??:0 5 0x0000000000402b6f: _start at ??:? KVM_SET_DEVICE_ATTR failed, rc: -1 errno: 22 (Invalid argument) Fixes: 40351ed924dd ("KVM: selftests: Refactor UAPI tests into dedicated function") Signed-off-by: Sebastian Ott Link: https://patch.msgid.link/20260504112808.21276-1-sebott@redhat.com Signed-off-by: Marc Zyngier

Merge tag 'kvm-x86-selftests_kernel_types-7.1' of https://github.com/kvm-x86/linux into HEAD

2026-04-27T08:24:41+00:00

KVM selftests type renames for 7.1 Renames types across all KVM selftests to more closely align with types used in the kernel: vm_vaddr_t -> gva_t vm_paddr_t -> gpa_t uint64_t -> u64 uint32_t -> u32 uint16_t -> u16 uint8_t -> u8 int64_t -> s64 int32_t -> s32 int16_t -> s16 int8_t -> s8 Using the kernel's preferred types eliminates a source of friction for many contributors, as the majority of KVM selftests contributions come from kernel developers. The kernel names are also shorter, which allows for more concise code, and in any many cases eliminates newlines thanks to shorter types and parameter names. Rename variables and parameters as well as types, e.g. gpa instead of paddr, to again align with the kernel, and in a few cases to remove ambiguity, e.g. where paddr is used to refer to a _host_ physical address.

KVM: selftests: Add check_steal_time_uapi() implementation for LoongArch

2026-04-27T08:23:17+00:00

Define check_steal_time_uapi() for LoongArch so that the steal_time test builds. Note, while LoongArch's steal_time_init() has some funky asserts, none of the code is uniquely verifying KVM's uAPI. Cc: Jiakai Xu Cc: Jiakai Xu Cc: Andrew Jones Cc: Anup Patel Cc: Tianrui Zhao Cc: Bibo Mao Cc: Huacai Chen Fixes: 40351ed924dd ("KVM: selftests: Refactor UAPI tests into dedicated function") Signed-off-by: Sean Christopherson Message-ID: <20260420192644.3892050-1-seanjc@google.com> Signed-off-by: Paolo Bonzini

KVM: selftests: Replace "paddr" with "gpa" throughout

2026-04-20T21:54:17+00:00

Replace all variations of "paddr" variables in KVM selftests with "gpa", with the exception of the ELF structures, as those fields are not specific to guest virtual addresses, to complete the conversion from vm_paddr_t to gpa_t. No functional change intended. Link: https://patch.msgid.link/20260420212004.3938325-20-seanjc@google.com Signed-off-by: Sean Christopherson

KVM: selftests: Replace "u64 nested_paddr" with "gpa_t l2_gpa"

2026-04-20T21:54:17+00:00

In x86's nested TDP APIs, use the appropriate gpa_t typedef and rename variables from nested_paddr to l2_gpa to match KVM x86's nomenclature. No functional change intended. Link: https://patch.msgid.link/20260420212004.3938325-19-seanjc@google.com Signed-off-by: Sean Christopherson

KVM: selftests: Replace "u64 gpa" with "gpa_t" throughout

2026-04-20T21:54:17+00:00

Use gpa_t instead of u64 for obvious declarations of GPA variables. No functional change intended. Link: https://patch.msgid.link/20260420212004.3938325-18-seanjc@google.com Signed-off-by: Sean Christopherson

KVM: selftests: Replace "vaddr" with "gva" throughout

2026-04-20T21:54:17+00:00

Replace all variations of "vaddr" variables in KVM selftests with "gva", with the exception of the ELF structures, as those fields are not specific to guest virtual addresses, to complete the conversion from vm_vaddr_t to gva_t. Opportunistically use gva_t instead of u64 for relevant variables, and fixup indentation as appropriate. No functional change intended. Link: https://patch.msgid.link/20260420212004.3938325-17-seanjc@google.com Signed-off-by: Sean Christopherson