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selftests: kvm: add a SVM version of state-test

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The test is similar to the existing one for VMX, but simpler because we
don't have to test shadow VMCS or vmptrld/vmptrst/vmclear.

Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
This commit is contained in:
Paolo Bonzini 2020-05-19 13:23:05 -04:00
parent ed88129733
commit 10b910cb7e
1 changed files with 50 additions and 12 deletions
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62
tools/testing/selftests/kvm/x86_64/state_test.c
View File

@ -18,14 +18,46 @@
#include "kvm_util.h"
#include "processor.h"
#include "vmx.h"
#include "svm_util.h"
#define VCPU_ID 5
#define L2_GUEST_STACK_SIZE 256
void l2_guest_code(void)
void svm_l2_guest_code(void)
{
GUEST_SYNC(4);
/* Exit to L1 */
vmcall();
GUEST_SYNC(6);
/* Done, exit to L1 and never come back. */
vmcall();
}
static void svm_l1_guest_code(struct svm_test_data *svm)
{
unsigned long l2_guest_stack[L2_GUEST_STACK_SIZE];
struct vmcb *vmcb = svm->vmcb;
GUEST_ASSERT(svm->vmcb_gpa);
/* Prepare for L2 execution. */
generic_svm_setup(svm, svm_l2_guest_code,
&l2_guest_stack[L2_GUEST_STACK_SIZE]);
GUEST_SYNC(3);
run_guest(vmcb, svm->vmcb_gpa);
GUEST_ASSERT(vmcb->control.exit_code == SVM_EXIT_VMMCALL);
GUEST_SYNC(5);
vmcb->save.rip += 3;
run_guest(vmcb, svm->vmcb_gpa);
GUEST_ASSERT(vmcb->control.exit_code == SVM_EXIT_VMMCALL);
GUEST_SYNC(7);
}
void vmx_l2_guest_code(void)
{
GUEST_SYNC(6);
/* Exit to L1 */
/* Exit to L1 */
vmcall();
/* L1 has now set up a shadow VMCS for us. */
@ -42,10 +74,9 @@ void l2_guest_code(void)
vmcall();
}
void l1_guest_code(struct vmx_pages *vmx_pages)
static void vmx_l1_guest_code(struct vmx_pages *vmx_pages)
{
#define L2_GUEST_STACK_SIZE 64
unsigned long l2_guest_stack[L2_GUEST_STACK_SIZE];
unsigned long l2_guest_stack[L2_GUEST_STACK_SIZE];
GUEST_ASSERT(vmx_pages->vmcs_gpa);
GUEST_ASSERT(prepare_for_vmx_operation(vmx_pages));
@ -56,7 +87,7 @@ void l1_guest_code(struct vmx_pages *vmx_pages)
GUEST_SYNC(4);
GUEST_ASSERT(vmptrstz() == vmx_pages->vmcs_gpa);
prepare_vmcs(vmx_pages, l2_guest_code,
prepare_vmcs(vmx_pages, vmx_l2_guest_code,
&l2_guest_stack[L2_GUEST_STACK_SIZE]);
GUEST_SYNC(5);
@ -106,20 +137,24 @@ void l1_guest_code(struct vmx_pages *vmx_pages)
GUEST_ASSERT(vmresume());
}
void guest_code(struct vmx_pages *vmx_pages)
static void __attribute__((__flatten__)) guest_code(void *arg)
{
GUEST_SYNC(1);
GUEST_SYNC(2);
if (vmx_pages)
l1_guest_code(vmx_pages);
if (arg) {
if (cpu_has_svm())
svm_l1_guest_code(arg);
else
vmx_l1_guest_code(arg);
}
GUEST_DONE();
}
int main(int argc, char *argv[])
{
vm_vaddr_t vmx_pages_gva = 0;
vm_vaddr_t nested_gva = 0;
struct kvm_regs regs1, regs2;
struct kvm_vm *vm;
@ -136,8 +171,11 @@ int main(int argc, char *argv[])
vcpu_regs_get(vm, VCPU_ID, &regs1);
if (kvm_check_cap(KVM_CAP_NESTED_STATE)) {
vcpu_alloc_vmx(vm, &vmx_pages_gva);
vcpu_args_set(vm, VCPU_ID, 1, vmx_pages_gva);
if (kvm_get_supported_cpuid_entry(0x80000001)->ecx & CPUID_SVM)
vcpu_alloc_svm(vm, &nested_gva);
else
vcpu_alloc_vmx(vm, &nested_gva);
vcpu_args_set(vm, VCPU_ID, 1, nested_gva);
} else {
pr_info("will skip nested state checks\n");
vcpu_args_set(vm, VCPU_ID, 1, 0);