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KVM: selftests: Introduce SEV VM type check

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In preparation for SNP, declutter the vm type check by introducing a
SEV-SNP VM type check as well as a transitive set of helper functions.

The SNP VM type is the subset of SEV-ES. Similarly, the SEV-ES and SNP
types are subset of the SEV VM type check.

Signed-off-by: Pratik R. Sampat <prsampat@amd.com>
Link: https://lore.kernel.org/r/20250305230000.231025-7-prsampat@amd.com
[sean: make the helpers static inlines]
Signed-off-by: Sean Christopherson <seanjc@google.com>
This commit is contained in:
Pratik R. Sampat 2025-03-05 16:59:56 -06:00 committed by Sean Christopherson
parent f694f30e81
commit 4a4e1e8e92
3 changed files with 18 additions and 3 deletions
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15
tools/testing/selftests/kvm/include/x86/sev.h
View File

@ -27,6 +27,21 @@ enum sev_guest_state {
#define GHCB_MSR_TERM_REQ 0x100
static inline bool is_sev_snp_vm(struct kvm_vm *vm)
{
return vm->type == KVM_X86_SNP_VM;
}
static inline bool is_sev_es_vm(struct kvm_vm *vm)
{
return is_sev_snp_vm(vm) || vm->type == KVM_X86_SEV_ES_VM;
}
static inline bool is_sev_vm(struct kvm_vm *vm)
{
return is_sev_es_vm(vm) || vm->type == KVM_X86_SEV_VM;
}
void sev_vm_launch(struct kvm_vm *vm, uint32_t policy);
void sev_vm_launch_measure(struct kvm_vm *vm, uint8_t *measurement);
void sev_vm_launch_finish(struct kvm_vm *vm);

4
tools/testing/selftests/kvm/lib/x86/processor.c
View File

@ -639,7 +639,7 @@ void kvm_arch_vm_post_create(struct kvm_vm *vm)
sync_global_to_guest(vm, host_cpu_is_amd);
sync_global_to_guest(vm, is_forced_emulation_enabled);
if (vm->type == KVM_X86_SEV_VM || vm->type == KVM_X86_SEV_ES_VM) {
if (is_sev_vm(vm)) {
struct kvm_sev_init init = { 0 };
vm_sev_ioctl(vm, KVM_SEV_INIT2, &init);
@ -1156,7 +1156,7 @@ void kvm_get_cpu_address_width(unsigned int *pa_bits, unsigned int *va_bits)
void kvm_init_vm_address_properties(struct kvm_vm *vm)
{
if (vm->type == KVM_X86_SEV_VM || vm->type == KVM_X86_SEV_ES_VM) {
if (is_sev_vm(vm)) {
vm->arch.sev_fd = open_sev_dev_path_or_exit();
vm->arch.c_bit = BIT_ULL(this_cpu_property(X86_PROPERTY_SEV_C_BIT));
vm->gpa_tag_mask = vm->arch.c_bit;

2
tools/testing/selftests/kvm/x86/sev_smoke_test.c
View File

@ -124,7 +124,7 @@ static void test_sev(void *guest_code, uint64_t policy)
for (;;) {
vcpu_run(vcpu);
if (policy & SEV_POLICY_ES) {
if (is_sev_es_vm(vm)) {
TEST_ASSERT(vcpu->run->exit_reason == KVM_EXIT_SYSTEM_EVENT,
"Wanted SYSTEM_EVENT, got %s",
exit_reason_str(vcpu->run->exit_reason));