From: Patrick Roy patrick.roy@linux.dev
Use one of the padding fields in struct vm_shape to carry an enum vm_mem_backing_src_type value, to give the option to overwrite the default of VM_MEM_SRC_ANONYMOUS in __vm_create().
Overwriting this default will allow tests to create VMs where the test code is backed by mmap'd guest_memfd instead of anonymous memory.
Signed-off-by: Patrick Roy patrick.roy@linux.dev Signed-off-by: Nikita Kalyazin kalyazin@amazon.com --- .../testing/selftests/kvm/include/kvm_util.h | 19 ++++++++++--------- tools/testing/selftests/kvm/lib/kvm_util.c | 2 +- tools/testing/selftests/kvm/lib/x86/sev.c | 1 + .../selftests/kvm/pre_fault_memory_test.c | 1 + 4 files changed, 13 insertions(+), 10 deletions(-)
diff --git a/tools/testing/selftests/kvm/include/kvm_util.h b/tools/testing/selftests/kvm/include/kvm_util.h index 6689b43810c1..4bc4af9a40cf 100644 --- a/tools/testing/selftests/kvm/include/kvm_util.h +++ b/tools/testing/selftests/kvm/include/kvm_util.h @@ -192,7 +192,7 @@ enum vm_guest_mode { struct vm_shape { uint32_t type; uint8_t mode; - uint8_t pad0; + uint8_t src_type; uint16_t pad1; };
@@ -200,14 +200,15 @@ kvm_static_assert(sizeof(struct vm_shape) == sizeof(uint64_t));
#define VM_TYPE_DEFAULT 0
-#define VM_SHAPE(__mode) \ -({ \ - struct vm_shape shape = { \ - .mode = (__mode), \ - .type = VM_TYPE_DEFAULT \ - }; \ - \ - shape; \ +#define VM_SHAPE(__mode) \ +({ \ + struct vm_shape shape = { \ + .mode = (__mode), \ + .type = VM_TYPE_DEFAULT, \ + .src_type = VM_MEM_SRC_ANONYMOUS \ + }; \ + \ + shape; \ })
#if defined(__aarch64__) diff --git a/tools/testing/selftests/kvm/lib/kvm_util.c b/tools/testing/selftests/kvm/lib/kvm_util.c index 28ee51253909..268a4520633b 100644 --- a/tools/testing/selftests/kvm/lib/kvm_util.c +++ b/tools/testing/selftests/kvm/lib/kvm_util.c @@ -467,7 +467,7 @@ struct kvm_vm *__vm_create(struct vm_shape shape, uint32_t nr_runnable_vcpus, if (is_guest_memfd_required(shape)) flags |= KVM_MEM_GUEST_MEMFD;
- vm_userspace_mem_region_add(vm, VM_MEM_SRC_ANONYMOUS, 0, 0, nr_pages, flags); + vm_userspace_mem_region_add(vm, shape.src_type, 0, 0, nr_pages, flags); for (i = 0; i < NR_MEM_REGIONS; i++) vm->memslots[i] = 0;
diff --git a/tools/testing/selftests/kvm/lib/x86/sev.c b/tools/testing/selftests/kvm/lib/x86/sev.c index c3a9838f4806..d920880e4fc0 100644 --- a/tools/testing/selftests/kvm/lib/x86/sev.c +++ b/tools/testing/selftests/kvm/lib/x86/sev.c @@ -164,6 +164,7 @@ struct kvm_vm *vm_sev_create_with_one_vcpu(uint32_t type, void *guest_code, struct vm_shape shape = { .mode = VM_MODE_DEFAULT, .type = type, + .src_type = VM_MEM_SRC_ANONYMOUS, }; struct kvm_vm *vm; struct kvm_vcpu *cpus[1]; diff --git a/tools/testing/selftests/kvm/pre_fault_memory_test.c b/tools/testing/selftests/kvm/pre_fault_memory_test.c index 93e603d91311..8a4d5af53fab 100644 --- a/tools/testing/selftests/kvm/pre_fault_memory_test.c +++ b/tools/testing/selftests/kvm/pre_fault_memory_test.c @@ -165,6 +165,7 @@ static void __test_pre_fault_memory(unsigned long vm_type, bool private) const struct vm_shape shape = { .mode = VM_MODE_DEFAULT, .type = vm_type, + .src_type = VM_MEM_SRC_ANONYMOUS, }; struct kvm_vcpu *vcpu; struct kvm_run *run;