Explicitly require KVM_CAP_USER_MEMORY2 for selftests that create memslots, i.e. skip selftests that need memslots instead of letting them fail on KVM_SET_USER_MEMORY_REGION2. While it's ok to take a dependency on new kernel features, selftests should skip gracefully instead of failing hard when run on older kernels. Reported-by: Dan Carpenter <dan.carpenter@xxxxxxxxxx> Closes: https://lore.kernel.org/all/69ae0694-8ca3-402c-b864-99b500b24f5d@moroto.mountain Suggested-by: Shuah Khan <skhan@xxxxxxxxxxxxxxxxxxx> Signed-off-by: Sean Christopherson <seanjc@xxxxxxxxxx> --- tools/testing/selftests/kvm/lib/kvm_util.c | 8 ++++++++ 1 file changed, 8 insertions(+) diff --git a/tools/testing/selftests/kvm/lib/kvm_util.c b/tools/testing/selftests/kvm/lib/kvm_util.c index 6b2158655baa..ad00e4761886 100644 --- a/tools/testing/selftests/kvm/lib/kvm_util.c +++ b/tools/testing/selftests/kvm/lib/kvm_util.c @@ -935,6 +935,10 @@ void vm_set_user_memory_region(struct kvm_vm *vm, uint32_t slot, uint32_t flags, errno, strerror(errno)); } +#define TEST_REQUIRE_SET_USER_MEMORY_REGION2() \ + __TEST_REQUIRE(kvm_has_cap(KVM_CAP_USER_MEMORY2), \ + "KVM selftests now require KVM_SET_USER_MEMORY_REGION2 (introduced in v6.8)") + int __vm_set_user_memory_region2(struct kvm_vm *vm, uint32_t slot, uint32_t flags, uint64_t gpa, uint64_t size, void *hva, uint32_t guest_memfd, uint64_t guest_memfd_offset) @@ -949,6 +953,8 @@ int __vm_set_user_memory_region2(struct kvm_vm *vm, uint32_t slot, uint32_t flag .guest_memfd_offset = guest_memfd_offset, }; + TEST_REQUIRE_SET_USER_MEMORY_REGION2(); + return ioctl(vm->fd, KVM_SET_USER_MEMORY_REGION2, ®ion); } @@ -975,6 +981,8 @@ void vm_mem_add(struct kvm_vm *vm, enum vm_mem_backing_src_type src_type, size_t mem_size = npages * vm->page_size; size_t alignment; + TEST_REQUIRE_SET_USER_MEMORY_REGION2(); + TEST_ASSERT(vm_adjust_num_guest_pages(vm->mode, npages) == npages, "Number of guest pages is not compatible with the host. " "Try npages=%d", vm_adjust_num_guest_pages(vm->mode, npages)); base-commit: 2489e6c9ebb57d6d0e98936479b5f586201379c7 -- 2.44.0.769.g3c40516874-goog
