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
test_hwcr_bit(struct kvm_vcpu * vcpu,unsigned int bit)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
main(int argc,char * argv[])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