Add tests for newly added KVM_{GET,SET}_ONE_REG support for x86. Verify the
new ioctls can read and write real MSRs and synthetic MSRs.
Signed-off-by: Chao Gao <chao....@intel.com>
---
tools/arch/x86/include/uapi/asm/kvm.h | 24 +++++++++++++
tools/testing/selftests/kvm/Makefile.kvm | 1 +
.../selftests/kvm/x86/get_set_one_reg.c | 35 +++++++++++++++++++
3 files changed, 60 insertions(+)
create mode 100644 tools/testing/selftests/kvm/x86/get_set_one_reg.c
diff --git a/tools/arch/x86/include/uapi/asm/kvm.h
b/tools/arch/x86/include/uapi/asm/kvm.h
index 6f3499507c5e..590762820a61 100644
--- a/tools/arch/x86/include/uapi/asm/kvm.h
+++ b/tools/arch/x86/include/uapi/asm/kvm.h
@@ -411,6 +411,30 @@ struct kvm_xcrs {
__u64 padding[16];
};
+#define KVM_X86_REG_TYPE_MSR 2
+#define KVM_X86_REG_TYPE_SYNTHETIC_MSR 3
+
+#define KVM_X86_REG_TYPE_SIZE(type)
\
+({
\
+ __u64 type_size = (__u64)type << 32;
\
+
\
+ type_size |= type == KVM_X86_REG_TYPE_MSR ? KVM_REG_SIZE_U64 :
\
+ type == KVM_X86_REG_TYPE_SYNTHETIC_MSR ? KVM_REG_SIZE_U64
:\
+ 0;
\
+ type_size;
\
+})
+
+#define KVM_X86_REG_ENCODE(type, index) \
+ (KVM_REG_X86 | KVM_X86_REG_TYPE_SIZE(type) | index)
+
+#define KVM_X86_REG_MSR(index) \
+ KVM_X86_REG_ENCODE(KVM_X86_REG_TYPE_MSR, index)
+#define KVM_X86_REG_SYNTHETIC_MSR(index) \
+ KVM_X86_REG_ENCODE(KVM_X86_REG_TYPE_SYNTHETIC_MSR, index)
+
+/* KVM synthetic MSR index staring from 0 */
+#define KVM_SYNTHETIC_GUEST_SSP 0
+
#define KVM_SYNC_X86_REGS (1UL << 0)
#define KVM_SYNC_X86_SREGS (1UL << 1)
#define KVM_SYNC_X86_EVENTS (1UL << 2)
diff --git a/tools/testing/selftests/kvm/Makefile.kvm
b/tools/testing/selftests/kvm/Makefile.kvm
index f6fe7a07a0a2..9a375d5faf1c 100644
--- a/tools/testing/selftests/kvm/Makefile.kvm
+++ b/tools/testing/selftests/kvm/Makefile.kvm
@@ -136,6 +136,7 @@ TEST_GEN_PROGS_x86 += x86/max_vcpuid_cap_test
TEST_GEN_PROGS_x86 += x86/triple_fault_event_test
TEST_GEN_PROGS_x86 += x86/recalc_apic_map_test
TEST_GEN_PROGS_x86 += x86/aperfmperf_test
+TEST_GEN_PROGS_x86 += x86/get_set_one_reg
TEST_GEN_PROGS_x86 += access_tracking_perf_test
TEST_GEN_PROGS_x86 += coalesced_io_test
TEST_GEN_PROGS_x86 += dirty_log_perf_test
diff --git a/tools/testing/selftests/kvm/x86/get_set_one_reg.c
b/tools/testing/selftests/kvm/x86/get_set_one_reg.c
new file mode 100644
index 000000000000..8b069155ddc7
--- /dev/null
+++ b/tools/testing/selftests/kvm/x86/get_set_one_reg.c
@@ -0,0 +1,35 @@
+// SPDX-License-Identifier: GPL-2.0
+#include <fcntl.h>
+#include <stdint.h>
+#include <sys/ioctl.h>
+
+#include "test_util.h"
+#include "kvm_util.h"
+#include "processor.h"
+
+int main(int argc, char *argv[])
+{
+ struct kvm_vcpu *vcpu;
+ struct kvm_vm *vm;
+ u64 data;
+ int r;
+
+ TEST_REQUIRE(kvm_has_cap(KVM_CAP_ONE_REG));
+
+ vm = vm_create_with_one_vcpu(&vcpu, NULL);
+
+ TEST_ASSERT_EQ(__vcpu_get_reg(vcpu, KVM_X86_REG_MSR(MSR_EFER), &data),
0);
+ TEST_ASSERT_EQ(__vcpu_set_reg(vcpu, KVM_X86_REG_MSR(MSR_EFER), data),
0);
+
+ if (kvm_cpu_has(X86_FEATURE_SHSTK)) {
+ r = __vcpu_get_reg(vcpu,
KVM_X86_REG_SYNTHETIC_MSR(KVM_SYNTHETIC_GUEST_SSP),
+ &data);
+ TEST_ASSERT_EQ(r, 0);
+ r = __vcpu_set_reg(vcpu,
KVM_X86_REG_SYNTHETIC_MSR(KVM_SYNTHETIC_GUEST_SSP),
+ data);
+ TEST_ASSERT_EQ(r, 0);
+ }
+
+ kvm_vm_free(vm);
+ return 0;
+}
--
2.47.3
