diff mbox series

[v2,2/2] selftests: KVM: SVM: Add vmcall test

Message ID 20200203090851.19938-3-eric.auger@redhat.com (mailing list archive)
State New, archived
Headers show
Series selftests: KVM: AMD Nested SVM test infrastructure | expand

Commit Message

Eric Auger Feb. 3, 2020, 9:08 a.m. UTC 
L2 guest calls vmcall and L1 checks the exit status does
correspond.

Signed-off-by: Eric Auger <eric.auger@redhat.com>
---
 tools/testing/selftests/kvm/Makefile          |  1 +
 .../selftests/kvm/x86_64/svm_vmcall_test.c    | 86 +++++++++++++++++++
 2 files changed, 87 insertions(+)
 create mode 100644 tools/testing/selftests/kvm/x86_64/svm_vmcall_test.c

Comments

Vitaly Kuznetsov Feb. 3, 2020, 9:44 a.m. UTC | #1 
Eric Auger <eric.auger@redhat.com> writes:

> L2 guest calls vmcall and L1 checks the exit status does
> correspond.
>
> Signed-off-by: Eric Auger <eric.auger@redhat.com>
> ---
>  tools/testing/selftests/kvm/Makefile          |  1 +
>  .../selftests/kvm/x86_64/svm_vmcall_test.c    | 86 +++++++++++++++++++
>  2 files changed, 87 insertions(+)
>  create mode 100644 tools/testing/selftests/kvm/x86_64/svm_vmcall_test.c
>
> diff --git a/tools/testing/selftests/kvm/Makefile b/tools/testing/selftests/kvm/Makefile
> index 2e770f554cae..b529d3b42c02 100644
> --- a/tools/testing/selftests/kvm/Makefile
> +++ b/tools/testing/selftests/kvm/Makefile
> @@ -26,6 +26,7 @@ TEST_GEN_PROGS_x86_64 += x86_64/vmx_dirty_log_test
>  TEST_GEN_PROGS_x86_64 += x86_64/vmx_set_nested_state_test
>  TEST_GEN_PROGS_x86_64 += x86_64/vmx_tsc_adjust_test
>  TEST_GEN_PROGS_x86_64 += x86_64/xss_msr_test
> +TEST_GEN_PROGS_x86_64 += x86_64/svm_vmcall_test
>  TEST_GEN_PROGS_x86_64 += clear_dirty_log_test
>  TEST_GEN_PROGS_x86_64 += dirty_log_test
>  TEST_GEN_PROGS_x86_64 += kvm_create_max_vcpus
> diff --git a/tools/testing/selftests/kvm/x86_64/svm_vmcall_test.c b/tools/testing/selftests/kvm/x86_64/svm_vmcall_test.c
> new file mode 100644
> index 000000000000..75e66f3bbbc0
> --- /dev/null
> +++ b/tools/testing/selftests/kvm/x86_64/svm_vmcall_test.c
> @@ -0,0 +1,86 @@
> +// SPDX-License-Identifier: GPL-2.0-only
> +/*
> + * svm_vmcall_test
> + *
> + * Copyright (C) 2020, Red Hat, Inc.
> + *
> + * Nested SVM testing: VMCALL
> + */
> +
> +#include "test_util.h"
> +#include "kvm_util.h"
> +#include "processor.h"
> +#include "svm.h"
> +
> +#include <string.h>
> +#include <sys/ioctl.h>
> +
> +#include "kselftest.h"
> +#include <linux/kernel.h>
> +
> +#define VCPU_ID		5
> +
> +/* The virtual machine object. */

I'm not sure this comment is any helpful, the virus is probably
spreading from vmx_close_while_nested_test.c/vmx_tsc_adjust_test.c :-)

> +static struct kvm_vm *vm;
> +
> +static inline void l2_vmcall(struct svm_test_data *svm)
> +{
> +	__asm__ __volatile__("vmcall");
> +}
> +
> +static void l1_guest_code(struct svm_test_data *svm)
> +{
> +	#define L2_GUEST_STACK_SIZE 64
> +	unsigned long l2_guest_stack[L2_GUEST_STACK_SIZE];
> +	struct vmcb *vmcb = svm->vmcb;
> +
> +	/* Prepare for L2 execution. */
> +	generic_svm_setup(svm, l2_vmcall,
> +			  &l2_guest_stack[L2_GUEST_STACK_SIZE]);
> +
> +	run_guest(vmcb, svm->vmcb_gpa);
> +
> +	GUEST_ASSERT(vmcb->control.exit_code == SVM_EXIT_VMMCALL);
> +	GUEST_DONE();
> +}
> +
> +int main(int argc, char *argv[])
> +{
> +	vm_vaddr_t svm_gva;
> +
> +	nested_svm_check_supported();
> +
> +	vm = vm_create_default(VCPU_ID, 0, (void *) l1_guest_code);
> +	vcpu_set_cpuid(vm, VCPU_ID, kvm_get_supported_cpuid());
> +
> +	vcpu_alloc_svm(vm, &svm_gva);
> +	vcpu_args_set(vm, VCPU_ID, 1, svm_gva);
> +
> +	for (;;) {
> +		volatile struct kvm_run *run = vcpu_state(vm, VCPU_ID);
> +		struct ucall uc;
> +
> +		vcpu_run(vm, VCPU_ID);
> +		TEST_ASSERT(run->exit_reason == KVM_EXIT_IO,
> +			    "Got exit_reason other than KVM_EXIT_IO: %u (%s)\n",
> +			    run->exit_reason,
> +			    exit_reason_str(run->exit_reason));
> +
> +		switch (get_ucall(vm, VCPU_ID, &uc)) {
> +		case UCALL_ABORT:
> +			TEST_ASSERT(false, "%s",
> +				    (const char *)uc.args[0]);
> +			/* NOT REACHED */
> +		case UCALL_SYNC:
> +			break;
> +		case UCALL_DONE:
> +			goto done;
> +		default:
> +			TEST_ASSERT(false,
> +				    "Unknown ucall 0x%x.", uc.cmd);
> +		}
> +	}
> +done:
> +	kvm_vm_free(vm);
> +	return 0;
> +}

Reviewed-by: Vitaly Kuznetsov <vkuznets@redhat.com>

Thanks!
Eric Auger Feb. 3, 2020, 9:59 a.m. UTC | #2 
Hi,

On 2/3/20 10:44 AM, Vitaly Kuznetsov wrote:
> Eric Auger <eric.auger@redhat.com> writes:
> 
>> L2 guest calls vmcall and L1 checks the exit status does
>> correspond.
>>
>> Signed-off-by: Eric Auger <eric.auger@redhat.com>
>> ---
>>  tools/testing/selftests/kvm/Makefile          |  1 +
>>  .../selftests/kvm/x86_64/svm_vmcall_test.c    | 86 +++++++++++++++++++
>>  2 files changed, 87 insertions(+)
>>  create mode 100644 tools/testing/selftests/kvm/x86_64/svm_vmcall_test.c
>>
>> diff --git a/tools/testing/selftests/kvm/Makefile b/tools/testing/selftests/kvm/Makefile
>> index 2e770f554cae..b529d3b42c02 100644
>> --- a/tools/testing/selftests/kvm/Makefile
>> +++ b/tools/testing/selftests/kvm/Makefile
>> @@ -26,6 +26,7 @@ TEST_GEN_PROGS_x86_64 += x86_64/vmx_dirty_log_test
>>  TEST_GEN_PROGS_x86_64 += x86_64/vmx_set_nested_state_test
>>  TEST_GEN_PROGS_x86_64 += x86_64/vmx_tsc_adjust_test
>>  TEST_GEN_PROGS_x86_64 += x86_64/xss_msr_test
>> +TEST_GEN_PROGS_x86_64 += x86_64/svm_vmcall_test
>>  TEST_GEN_PROGS_x86_64 += clear_dirty_log_test
>>  TEST_GEN_PROGS_x86_64 += dirty_log_test
>>  TEST_GEN_PROGS_x86_64 += kvm_create_max_vcpus
>> diff --git a/tools/testing/selftests/kvm/x86_64/svm_vmcall_test.c b/tools/testing/selftests/kvm/x86_64/svm_vmcall_test.c
>> new file mode 100644
>> index 000000000000..75e66f3bbbc0
>> --- /dev/null
>> +++ b/tools/testing/selftests/kvm/x86_64/svm_vmcall_test.c
>> @@ -0,0 +1,86 @@
>> +// SPDX-License-Identifier: GPL-2.0-only
>> +/*
>> + * svm_vmcall_test
>> + *
>> + * Copyright (C) 2020, Red Hat, Inc.
>> + *
>> + * Nested SVM testing: VMCALL
>> + */
>> +
>> +#include "test_util.h"
>> +#include "kvm_util.h"
>> +#include "processor.h"
>> +#include "svm.h"
>> +
>> +#include <string.h>
>> +#include <sys/ioctl.h>
>> +
>> +#include "kselftest.h"
>> +#include <linux/kernel.h>
>> +
>> +#define VCPU_ID		5
>> +
>> +/* The virtual machine object. */
> 
> I'm not sure this comment is any helpful, the virus is probably
> spreading from vmx_close_while_nested_test.c/vmx_tsc_adjust_test.c :-)

;-)
> 
>> +static struct kvm_vm *vm;
>> +
>> +static inline void l2_vmcall(struct svm_test_data *svm)
>> +{
>> +	__asm__ __volatile__("vmcall");
>> +}
>> +
>> +static void l1_guest_code(struct svm_test_data *svm)
>> +{
>> +	#define L2_GUEST_STACK_SIZE 64
>> +	unsigned long l2_guest_stack[L2_GUEST_STACK_SIZE];
>> +	struct vmcb *vmcb = svm->vmcb;
>> +
>> +	/* Prepare for L2 execution. */
>> +	generic_svm_setup(svm, l2_vmcall,
>> +			  &l2_guest_stack[L2_GUEST_STACK_SIZE]);
>> +
>> +	run_guest(vmcb, svm->vmcb_gpa);
>> +
>> +	GUEST_ASSERT(vmcb->control.exit_code == SVM_EXIT_VMMCALL);
>> +	GUEST_DONE();
>> +}
>> +
>> +int main(int argc, char *argv[])
>> +{
>> +	vm_vaddr_t svm_gva;
>> +
>> +	nested_svm_check_supported();
>> +
>> +	vm = vm_create_default(VCPU_ID, 0, (void *) l1_guest_code);
>> +	vcpu_set_cpuid(vm, VCPU_ID, kvm_get_supported_cpuid());
>> +
>> +	vcpu_alloc_svm(vm, &svm_gva);
>> +	vcpu_args_set(vm, VCPU_ID, 1, svm_gva);
>> +
>> +	for (;;) {
>> +		volatile struct kvm_run *run = vcpu_state(vm, VCPU_ID);
>> +		struct ucall uc;
>> +
>> +		vcpu_run(vm, VCPU_ID);
>> +		TEST_ASSERT(run->exit_reason == KVM_EXIT_IO,
>> +			    "Got exit_reason other than KVM_EXIT_IO: %u (%s)\n",
>> +			    run->exit_reason,
>> +			    exit_reason_str(run->exit_reason));
>> +
>> +		switch (get_ucall(vm, VCPU_ID, &uc)) {
>> +		case UCALL_ABORT:
>> +			TEST_ASSERT(false, "%s",
>> +				    (const char *)uc.args[0]);
>> +			/* NOT REACHED */
>> +		case UCALL_SYNC:
>> +			break;
>> +		case UCALL_DONE:
>> +			goto done;
>> +		default:
>> +			TEST_ASSERT(false,
>> +				    "Unknown ucall 0x%x.", uc.cmd);
>> +		}
>> +	}
>> +done:
>> +	kvm_vm_free(vm);
>> +	return 0;
>> +}
> 
> Reviewed-by: Vitaly Kuznetsov <vkuznets@redhat.com>

Thanks!

I will respin quickly

Eric
> 
> Thanks!
>
diff mbox series

Patch

diff --git a/tools/testing/selftests/kvm/Makefile b/tools/testing/selftests/kvm/Makefile
index 2e770f554cae..b529d3b42c02 100644
--- a/tools/testing/selftests/kvm/Makefile
+++ b/tools/testing/selftests/kvm/Makefile
@@ -26,6 +26,7 @@  TEST_GEN_PROGS_x86_64 += x86_64/vmx_dirty_log_test
 TEST_GEN_PROGS_x86_64 += x86_64/vmx_set_nested_state_test
 TEST_GEN_PROGS_x86_64 += x86_64/vmx_tsc_adjust_test
 TEST_GEN_PROGS_x86_64 += x86_64/xss_msr_test
+TEST_GEN_PROGS_x86_64 += x86_64/svm_vmcall_test
 TEST_GEN_PROGS_x86_64 += clear_dirty_log_test
 TEST_GEN_PROGS_x86_64 += dirty_log_test
 TEST_GEN_PROGS_x86_64 += kvm_create_max_vcpus
diff --git a/tools/testing/selftests/kvm/x86_64/svm_vmcall_test.c b/tools/testing/selftests/kvm/x86_64/svm_vmcall_test.c
new file mode 100644
index 000000000000..75e66f3bbbc0
--- /dev/null
+++ b/tools/testing/selftests/kvm/x86_64/svm_vmcall_test.c
@@ -0,0 +1,86 @@ 
+// SPDX-License-Identifier: GPL-2.0-only
+/*
+ * svm_vmcall_test
+ *
+ * Copyright (C) 2020, Red Hat, Inc.
+ *
+ * Nested SVM testing: VMCALL
+ */
+
+#include "test_util.h"
+#include "kvm_util.h"
+#include "processor.h"
+#include "svm.h"
+
+#include <string.h>
+#include <sys/ioctl.h>
+
+#include "kselftest.h"
+#include <linux/kernel.h>
+
+#define VCPU_ID		5
+
+/* The virtual machine object. */
+static struct kvm_vm *vm;
+
+static inline void l2_vmcall(struct svm_test_data *svm)
+{
+	__asm__ __volatile__("vmcall");
+}
+
+static void l1_guest_code(struct svm_test_data *svm)
+{
+	#define L2_GUEST_STACK_SIZE 64
+	unsigned long l2_guest_stack[L2_GUEST_STACK_SIZE];
+	struct vmcb *vmcb = svm->vmcb;
+
+	/* Prepare for L2 execution. */
+	generic_svm_setup(svm, l2_vmcall,
+			  &l2_guest_stack[L2_GUEST_STACK_SIZE]);
+
+	run_guest(vmcb, svm->vmcb_gpa);
+
+	GUEST_ASSERT(vmcb->control.exit_code == SVM_EXIT_VMMCALL);
+	GUEST_DONE();
+}
+
+int main(int argc, char *argv[])
+{
+	vm_vaddr_t svm_gva;
+
+	nested_svm_check_supported();
+
+	vm = vm_create_default(VCPU_ID, 0, (void *) l1_guest_code);
+	vcpu_set_cpuid(vm, VCPU_ID, kvm_get_supported_cpuid());
+
+	vcpu_alloc_svm(vm, &svm_gva);
+	vcpu_args_set(vm, VCPU_ID, 1, svm_gva);
+
+	for (;;) {
+		volatile struct kvm_run *run = vcpu_state(vm, VCPU_ID);
+		struct ucall uc;
+
+		vcpu_run(vm, VCPU_ID);
+		TEST_ASSERT(run->exit_reason == KVM_EXIT_IO,
+			    "Got exit_reason other than KVM_EXIT_IO: %u (%s)\n",
+			    run->exit_reason,
+			    exit_reason_str(run->exit_reason));
+
+		switch (get_ucall(vm, VCPU_ID, &uc)) {
+		case UCALL_ABORT:
+			TEST_ASSERT(false, "%s",
+				    (const char *)uc.args[0]);
+			/* NOT REACHED */
+		case UCALL_SYNC:
+			break;
+		case UCALL_DONE:
+			goto done;
+		default:
+			TEST_ASSERT(false,
+				    "Unknown ucall 0x%x.", uc.cmd);
+		}
+	}
+done:
+	kvm_vm_free(vm);
+	return 0;
+}