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
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