#define MEM_REGION_SLOT 10
#define MEM_REGION_SIZE PAGE_SIZE
-static void guest_code(void)
+static void guest_code(bool tdp_enabled)
{
- flds(MEM_REGION_GVA);
+ uint64_t error_code;
+ uint64_t vector;
+
+ vector = kvm_asm_safe_ec(FLDS_MEM_EAX, error_code, "a"(MEM_REGION_GVA));
+
+ /*
+ * When TDP is enabled, flds will trigger an emulation failure, exit to
+ * userspace, and then the selftest host "VMM" skips the instruction.
+ *
+ * When TDP is disabled, no instruction emulation is required so flds
+ * should generate #PF(RSVD).
+ */
+ if (tdp_enabled) {
+ GUEST_ASSERT(!vector);
+ } else {
+ GUEST_ASSERT_EQ(vector, PF_VECTOR);
+ GUEST_ASSERT(error_code & PFERR_RSVD_MASK);
+ }
+
GUEST_DONE();
}
{
struct kvm_vcpu *vcpu;
struct kvm_vm *vm;
+ struct ucall uc;
uint64_t *pte;
uint64_t *hva;
uint64_t gpa;
TEST_REQUIRE(kvm_has_cap(KVM_CAP_SMALLER_MAXPHYADDR));
vm = vm_create_with_one_vcpu(&vcpu, guest_code);
+ vcpu_args_set(vcpu, 1, kvm_is_tdp_enabled());
+
+ vm_init_descriptor_tables(vm);
+ vcpu_init_descriptor_tables(vcpu);
vcpu_set_cpuid_maxphyaddr(vcpu, MAXPHYADDR);
*pte |= BIT_ULL(MAXPHYADDR);
vcpu_run(vcpu);
- handle_flds_emulation_failure_exit(vcpu);
- vcpu_run(vcpu);
- ASSERT_EQ(get_ucall(vcpu, NULL), UCALL_DONE);
+
+ /*
+ * When TDP is enabled, KVM must emulate in response the guest physical
+ * address that is illegal from the guest's perspective, but is legal
+ * from hardware's perspeective. This should result in an emulation
+ * failure exit to userspace since KVM doesn't support emulating flds.
+ */
+ if (kvm_is_tdp_enabled()) {
+ handle_flds_emulation_failure_exit(vcpu);
+ vcpu_run(vcpu);
+ }
+
+ switch (get_ucall(vcpu, &uc)) {
+ case UCALL_ABORT:
+ REPORT_GUEST_ASSERT(uc);
+ break;
+ case UCALL_DONE:
+ break;
+ default:
+ TEST_FAIL("Unrecognized ucall: %lu\n", uc.cmd);
+ }
kvm_vm_free(vm);