1 // SPDX-License-Identifier: GPL-2.0 2 /* 3 * Copyright (C) 2023, Google LLC. 4 */ 5 6 #define _GNU_SOURCE /* for program_invocation_short_name */ 7 #include <sys/ioctl.h> 8 9 #include "test_util.h" 10 #include "kvm_util.h" 11 #include "vmx.h" 12 13 void test_hwcr_bit(struct kvm_vcpu *vcpu, unsigned int bit) 14 { 15 const uint64_t ignored = BIT_ULL(3) | BIT_ULL(6) | BIT_ULL(8); 16 const uint64_t valid = BIT_ULL(18) | BIT_ULL(24); 17 const uint64_t legal = ignored | valid; 18 uint64_t val = BIT_ULL(bit); 19 uint64_t actual; 20 int r; 21 22 r = _vcpu_set_msr(vcpu, MSR_K7_HWCR, val); 23 TEST_ASSERT(val & ~legal ? !r : r == 1, 24 "Expected KVM_SET_MSRS(MSR_K7_HWCR) = 0x%lx to %s", 25 val, val & ~legal ? "fail" : "succeed"); 26 27 actual = vcpu_get_msr(vcpu, MSR_K7_HWCR); 28 TEST_ASSERT(actual == (val & valid), 29 "Bit %u: unexpected HWCR 0x%lx; expected 0x%lx", 30 bit, actual, (val & valid)); 31 32 vcpu_set_msr(vcpu, MSR_K7_HWCR, 0); 33 } 34 35 int main(int argc, char *argv[]) 36 { 37 struct kvm_vm *vm; 38 struct kvm_vcpu *vcpu; 39 unsigned int bit; 40 41 vm = vm_create_with_one_vcpu(&vcpu, NULL); 42 43 for (bit = 0; bit < BITS_PER_LONG; bit++) 44 test_hwcr_bit(vcpu, bit); 45 46 kvm_vm_free(vm); 47 } 48