kernel/tools/testing/selftests/kvm/include/numaif.h, branch linux-rolling-stable

KVM: selftests: Add helpers to probe for NUMA support, and multi-node systems

2025-10-20T13:30:44Z

Add NUMA helpers to probe for support/availability and to check if the test is running on a multi-node system. The APIs will be used to verify guest_memfd NUMA support. Signed-off-by: Shivank Garg [sean: land helpers in numaif.h, add comments, tweak names] Link: https://lore.kernel.org/r/20251016172853.52451-11-seanjc@google.com Signed-off-by: Sean Christopherson

KVM: selftests: Use proper uAPI headers to pick up mempolicy.h definitions

2025-10-20T13:30:44Z

Drop the KVM's re-definitions of MPOL_xxx flags in numaif.h as they are defined by the already-included, kernel-provided mempolicy.h. The only reason the duplicate definitions don't cause compiler warnings is because they are identical, but only on x86-64! The syscall numbers in particular are subtly x86_64-specific, i.e. will cause problems if/when numaif.h is used outsize of x86. Opportunistically clean up the file comment as the license information is covered by the SPDX header, the path is superfluous, and as above the comment about the contents is flat out wrong. Fixes: 346b59f220a2 ("KVM: selftests: Add missing header file needed by xAPIC IPI tests") Reviewed-by: Shivank Garg Tested-by: Shivank Garg Link: https://lore.kernel.org/r/20251016172853.52451-10-seanjc@google.com Signed-off-by: Sean Christopherson

KVM: selftests: Add additional equivalents to libnuma APIs in KVM's numaif.h

2025-10-20T13:30:43Z

Add APIs for all syscalls defined in the kernel's mm/mempolicy.c to match those that would be provided by linking to libnuma. Opportunistically use the recently inroduced KVM_SYSCALL_DEFINE() builders to take care of the boilerplate, and to fix a flaw where the two existing wrappers would generate multiple symbols if numaif.h were to be included multiple times. Reviewed-by: Ackerley Tng Tested-by: Ackerley Tng Reviewed-by: Shivank Garg Tested-by: Shivank Garg Link: https://lore.kernel.org/r/20251016172853.52451-9-seanjc@google.com Signed-off-by: Sean Christopherson

KVM: selftests: Add missing header file needed by xAPIC IPI tests

2021-02-11T13:02:08Z

Fixes: 678e90a349a4 ("KVM: selftests: Test IPI to halted vCPU in xAPIC while backing page moves") Cc: Andrew Jones Cc: Jim Mattson Signed-off-by: Peter Shier Signed-off-by: Sean Christopherson Message-Id: <20210210011747.240913-1-seanjc@google.com> Signed-off-by: Paolo Bonzini