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KVM: selftests: add svm part to triple_fault_test 

Add a SVM implementation to triple_fault_test to test that
emulated/injected shutdown works.

Since instead of the VMX, the SVM allows the hypervisor to avoid
intercepting shutdown in guest, don't intercept shutdown to test that
KVM suports this correctly.

Signed-off-by: Maxim Levitsky <mlevitsk@redhat.com>
Message-Id: <20221103141351.50662-9-mlevitsk@redhat.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
This commit is contained in:
Maxim Levitsky 2022-11-03 16:13:50 +02:00 committed by Paolo Bonzini
parent 92e7d5c83a
commit 8357b9e19b
1 changed files with 56 additions and 17 deletions
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73
tools/testing/selftests/kvm/x86_64/triple_fault_event_test.c
View File

@ -3,6 +3,7 @@
#include "kvm_util.h"
#include "processor.h"
#include "vmx.h"
#include "svm_util.h"
#include <string.h>
#include <sys/ioctl.h>
@ -20,10 +21,11 @@ static void l2_guest_code(void)
: : [port] "d" (ARBITRARY_IO_PORT) : "rax");
}
void l1_guest_code(struct vmx_pages *vmx)
{
#define L2_GUEST_STACK_SIZE 64
unsigned long l2_guest_stack[L2_GUEST_STACK_SIZE];
unsigned long l2_guest_stack[L2_GUEST_STACK_SIZE];
void l1_guest_code_vmx(struct vmx_pages *vmx)
{
GUEST_ASSERT(vmx->vmcs_gpa);
GUEST_ASSERT(prepare_for_vmx_operation(vmx));
@ -38,24 +40,53 @@ void l1_guest_code(struct vmx_pages *vmx)
GUEST_DONE();
}
void l1_guest_code_svm(struct svm_test_data *svm)
{
struct vmcb *vmcb = svm->vmcb;
generic_svm_setup(svm, l2_guest_code,
&l2_guest_stack[L2_GUEST_STACK_SIZE]);
/* don't intercept shutdown to test the case of SVM allowing to do so */
vmcb->control.intercept &= ~(BIT(INTERCEPT_SHUTDOWN));
run_guest(vmcb, svm->vmcb_gpa);
/* should not reach here, L1 should crash */
GUEST_ASSERT(0);
}
int main(void)
{
struct kvm_vcpu *vcpu;
struct kvm_run *run;
struct kvm_vcpu_events events;
vm_vaddr_t vmx_pages_gva;
struct ucall uc;
TEST_REQUIRE(kvm_cpu_has(X86_FEATURE_VMX));
bool has_vmx = kvm_cpu_has(X86_FEATURE_VMX);
bool has_svm = kvm_cpu_has(X86_FEATURE_SVM);
TEST_REQUIRE(has_vmx || has_svm);
TEST_REQUIRE(kvm_has_cap(KVM_CAP_X86_TRIPLE_FAULT_EVENT));
vm = vm_create_with_one_vcpu(&vcpu, l1_guest_code);
vm_enable_cap(vm, KVM_CAP_X86_TRIPLE_FAULT_EVENT, 1);
if (has_vmx) {
vm_vaddr_t vmx_pages_gva;
vm = vm_create_with_one_vcpu(&vcpu, l1_guest_code_vmx);
vcpu_alloc_vmx(vm, &vmx_pages_gva);
vcpu_args_set(vcpu, 1, vmx_pages_gva);
} else {
vm_vaddr_t svm_gva;
vm = vm_create_with_one_vcpu(&vcpu, l1_guest_code_svm);
vcpu_alloc_svm(vm, &svm_gva);
vcpu_args_set(vcpu, 1, svm_gva);
}
vm_enable_cap(vm, KVM_CAP_X86_TRIPLE_FAULT_EVENT, 1);
run = vcpu->run;
vcpu_alloc_vmx(vm, &vmx_pages_gva);
vcpu_args_set(vcpu, 1, vmx_pages_gva);
vcpu_run(vcpu);
TEST_ASSERT(run->exit_reason == KVM_EXIT_IO,
@ -78,13 +109,21 @@ int main(void)
"No triple fault pending");
vcpu_run(vcpu);
switch (get_ucall(vcpu, &uc)) {
case UCALL_DONE:
break;
case UCALL_ABORT:
REPORT_GUEST_ASSERT(uc);
default:
TEST_FAIL("Unexpected ucall: %lu", uc.cmd);
}
if (has_svm) {
TEST_ASSERT(run->exit_reason == KVM_EXIT_SHUTDOWN,
"Got exit_reason other than KVM_EXIT_SHUTDOWN: %u (%s)\n",
run->exit_reason,
exit_reason_str(run->exit_reason));
} else {
switch (get_ucall(vcpu, &uc)) {
case UCALL_DONE:
break;
case UCALL_ABORT:
REPORT_GUEST_ASSERT(uc);
default:
TEST_FAIL("Unexpected ucall: %lu", uc.cmd);
}
}
return 0;
}