diff options
Diffstat (limited to 'tools/testing/selftests/kvm')
| -rw-r--r-- | tools/testing/selftests/kvm/Makefile | 1 | ||||
| -rw-r--r-- | tools/testing/selftests/kvm/x86_64/hwcr_msr_test.c | 47 |
2 files changed, 48 insertions, 0 deletions
diff --git a/tools/testing/selftests/kvm/Makefile b/tools/testing/selftests/kvm/Makefile index a3bb36fb3cfc..fb01c3f8d3da 100644 --- a/tools/testing/selftests/kvm/Makefile +++ b/tools/testing/selftests/kvm/Makefile @@ -66,6 +66,7 @@ TEST_GEN_PROGS_x86_64 += x86_64/dirty_log_page_splitting_test TEST_GEN_PROGS_x86_64 += x86_64/get_msr_index_features TEST_GEN_PROGS_x86_64 += x86_64/exit_on_emulation_failure_test TEST_GEN_PROGS_x86_64 += x86_64/fix_hypercall_test +TEST_GEN_PROGS_x86_64 += x86_64/hwcr_msr_test TEST_GEN_PROGS_x86_64 += x86_64/hyperv_clock TEST_GEN_PROGS_x86_64 += x86_64/hyperv_cpuid TEST_GEN_PROGS_x86_64 += x86_64/hyperv_evmcs diff --git a/tools/testing/selftests/kvm/x86_64/hwcr_msr_test.c b/tools/testing/selftests/kvm/x86_64/hwcr_msr_test.c new file mode 100644 index 000000000000..df351ae17029 --- /dev/null +++ b/tools/testing/selftests/kvm/x86_64/hwcr_msr_test.c @@ -0,0 +1,47 @@ +// SPDX-License-Identifier: GPL-2.0 +/* + * Copyright (C) 2023, Google LLC. + */ + +#define _GNU_SOURCE /* for program_invocation_short_name */ +#include <sys/ioctl.h> + +#include "test_util.h" +#include "kvm_util.h" +#include "vmx.h" + +void test_hwcr_bit(struct kvm_vcpu *vcpu, unsigned int bit) +{ + const uint64_t ignored = BIT_ULL(3) | BIT_ULL(6) | BIT_ULL(8); + const uint64_t valid = BIT_ULL(18) | BIT_ULL(24); + const uint64_t legal = ignored | valid; + uint64_t val = BIT_ULL(bit); + uint64_t actual; + int r; + + r = _vcpu_set_msr(vcpu, MSR_K7_HWCR, val); + TEST_ASSERT(val & ~legal ? !r : r == 1, + "Expected KVM_SET_MSRS(MSR_K7_HWCR) = 0x%lx to %s", + val, val & ~legal ? "fail" : "succeed"); + + actual = vcpu_get_msr(vcpu, MSR_K7_HWCR); + TEST_ASSERT(actual == (val & valid), + "Bit %u: unexpected HWCR 0x%lx; expected 0x%lx", + bit, actual, (val & valid)); + + vcpu_set_msr(vcpu, MSR_K7_HWCR, 0); +} + +int main(int argc, char *argv[]) +{ + struct kvm_vm *vm; + struct kvm_vcpu *vcpu; + unsigned int bit; + + vm = vm_create_with_one_vcpu(&vcpu, NULL); + + for (bit = 0; bit < BITS_PER_LONG; bit++) + test_hwcr_bit(vcpu, bit); + + kvm_vm_free(vm); +} |