diff options
| -rw-r--r-- | tools/testing/selftests/kvm/.gitignore | 1 | ||||
| -rw-r--r-- | tools/testing/selftests/kvm/Makefile | 1 | ||||
| -rw-r--r-- | tools/testing/selftests/kvm/include/kvm_util.h | 1 | ||||
| -rw-r--r-- | tools/testing/selftests/kvm/lib/kvm_util_internal.h | 2 | ||||
| -rw-r--r-- | tools/testing/selftests/kvm/x86_64/get_msr_index_features.c | 134 |
5 files changed, 137 insertions, 2 deletions
diff --git a/tools/testing/selftests/kvm/.gitignore b/tools/testing/selftests/kvm/.gitignore index 22be05c55f13..5873d54b19a0 100644 --- a/tools/testing/selftests/kvm/.gitignore +++ b/tools/testing/selftests/kvm/.gitignore @@ -8,6 +8,7 @@ /x86_64/debug_regs /x86_64/evmcs_test /x86_64/get_cpuid_test +/x86_64/get_msr_index_features /x86_64/kvm_pv_test /x86_64/hyperv_clock /x86_64/hyperv_cpuid diff --git a/tools/testing/selftests/kvm/Makefile b/tools/testing/selftests/kvm/Makefile index c3672e9087d3..ce34c8160fa3 100644 --- a/tools/testing/selftests/kvm/Makefile +++ b/tools/testing/selftests/kvm/Makefile @@ -39,6 +39,7 @@ LIBKVM_aarch64 = lib/aarch64/processor.c lib/aarch64/ucall.c LIBKVM_s390x = lib/s390x/processor.c lib/s390x/ucall.c lib/s390x/diag318_test_handler.c TEST_GEN_PROGS_x86_64 = x86_64/cr4_cpuid_sync_test +TEST_GEN_PROGS_x86_64 += x86_64/get_msr_index_features TEST_GEN_PROGS_x86_64 += x86_64/evmcs_test TEST_GEN_PROGS_x86_64 += x86_64/get_cpuid_test TEST_GEN_PROGS_x86_64 += x86_64/hyperv_clock diff --git a/tools/testing/selftests/kvm/include/kvm_util.h b/tools/testing/selftests/kvm/include/kvm_util.h index 2d7eb6989e83..81af4bcc9ab9 100644 --- a/tools/testing/selftests/kvm/include/kvm_util.h +++ b/tools/testing/selftests/kvm/include/kvm_util.h @@ -16,6 +16,7 @@ #include "sparsebit.h" +#define KVM_DEV_PATH "/dev/kvm" #define KVM_MAX_VCPUS 512 /* diff --git a/tools/testing/selftests/kvm/lib/kvm_util_internal.h b/tools/testing/selftests/kvm/lib/kvm_util_internal.h index 34465dc562d8..91ce1b5d480b 100644 --- a/tools/testing/selftests/kvm/lib/kvm_util_internal.h +++ b/tools/testing/selftests/kvm/lib/kvm_util_internal.h @@ -10,8 +10,6 @@ #include "sparsebit.h" -#define KVM_DEV_PATH "/dev/kvm" - struct userspace_mem_region { struct kvm_userspace_memory_region region; struct sparsebit *unused_phy_pages; diff --git a/tools/testing/selftests/kvm/x86_64/get_msr_index_features.c b/tools/testing/selftests/kvm/x86_64/get_msr_index_features.c new file mode 100644 index 000000000000..cb953df4d7d0 --- /dev/null +++ b/tools/testing/selftests/kvm/x86_64/get_msr_index_features.c @@ -0,0 +1,134 @@ +// SPDX-License-Identifier: GPL-2.0 +/* + * Test that KVM_GET_MSR_INDEX_LIST and + * KVM_GET_MSR_FEATURE_INDEX_LIST work as intended + * + * Copyright (C) 2020, Red Hat, Inc. + */ +#include <fcntl.h> +#include <stdio.h> +#include <stdlib.h> +#include <string.h> +#include <sys/ioctl.h> + +#include "test_util.h" +#include "kvm_util.h" +#include "processor.h" + +static int kvm_num_index_msrs(int kvm_fd, int nmsrs) +{ + struct kvm_msr_list *list; + int r; + + list = malloc(sizeof(*list) + nmsrs * sizeof(list->indices[0])); + list->nmsrs = nmsrs; + r = ioctl(kvm_fd, KVM_GET_MSR_INDEX_LIST, list); + TEST_ASSERT(r == -1 && errno == E2BIG, + "Unexpected result from KVM_GET_MSR_INDEX_LIST probe, r: %i", + r); + + r = list->nmsrs; + free(list); + return r; +} + +static void test_get_msr_index(void) +{ + int old_res, res, kvm_fd, r; + struct kvm_msr_list *list; + + kvm_fd = open(KVM_DEV_PATH, O_RDONLY); + if (kvm_fd < 0) + exit(KSFT_SKIP); + + old_res = kvm_num_index_msrs(kvm_fd, 0); + TEST_ASSERT(old_res != 0, "Expecting nmsrs to be > 0"); + + if (old_res != 1) { + res = kvm_num_index_msrs(kvm_fd, 1); + TEST_ASSERT(res > 1, "Expecting nmsrs to be > 1"); + TEST_ASSERT(res == old_res, "Expecting nmsrs to be identical"); + } + + list = malloc(sizeof(*list) + old_res * sizeof(list->indices[0])); + list->nmsrs = old_res; + r = ioctl(kvm_fd, KVM_GET_MSR_INDEX_LIST, list); + + TEST_ASSERT(r == 0, + "Unexpected result from KVM_GET_MSR_FEATURE_INDEX_LIST, r: %i", + r); + TEST_ASSERT(list->nmsrs == old_res, "Expecting nmsrs to be identical"); + free(list); + + close(kvm_fd); +} + +static int kvm_num_feature_msrs(int kvm_fd, int nmsrs) +{ + struct kvm_msr_list *list; + int r; + + list = malloc(sizeof(*list) + nmsrs * sizeof(list->indices[0])); + list->nmsrs = nmsrs; + r = ioctl(kvm_fd, KVM_GET_MSR_FEATURE_INDEX_LIST, list); + TEST_ASSERT(r == -1 && errno == E2BIG, + "Unexpected result from KVM_GET_MSR_FEATURE_INDEX_LIST probe, r: %i", + r); + + r = list->nmsrs; + free(list); + return r; +} + +struct kvm_msr_list *kvm_get_msr_feature_list(int kvm_fd, int nmsrs) +{ + struct kvm_msr_list *list; + int r; + + list = malloc(sizeof(*list) + nmsrs * sizeof(list->indices[0])); + list->nmsrs = nmsrs; + r = ioctl(kvm_fd, KVM_GET_MSR_FEATURE_INDEX_LIST, list); + + TEST_ASSERT(r == 0, + "Unexpected result from KVM_GET_MSR_FEATURE_INDEX_LIST, r: %i", + r); + + return list; +} + +static void test_get_msr_feature(void) +{ + int res, old_res, i, kvm_fd; + struct kvm_msr_list *feature_list; + + kvm_fd = open(KVM_DEV_PATH, O_RDONLY); + if (kvm_fd < 0) + exit(KSFT_SKIP); + + old_res = kvm_num_feature_msrs(kvm_fd, 0); + TEST_ASSERT(old_res != 0, "Expecting nmsrs to be > 0"); + + if (old_res != 1) { + res = kvm_num_feature_msrs(kvm_fd, 1); + TEST_ASSERT(res > 1, "Expecting nmsrs to be > 1"); + TEST_ASSERT(res == old_res, "Expecting nmsrs to be identical"); + } + + feature_list = kvm_get_msr_feature_list(kvm_fd, old_res); + TEST_ASSERT(old_res == feature_list->nmsrs, + "Unmatching number of msr indexes"); + + for (i = 0; i < feature_list->nmsrs; i++) + kvm_get_feature_msr(feature_list->indices[i]); + + free(feature_list); + close(kvm_fd); +} + +int main(int argc, char *argv[]) +{ + if (kvm_check_cap(KVM_CAP_GET_MSR_FEATURES)) + test_get_msr_feature(); + + test_get_msr_index(); +} |