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