51 lines
1.1 KiB
C
51 lines
1.1 KiB
C
// SPDX-License-Identifier: GPL-2.0
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/*
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* Copyright (C) 2023, Google LLC.
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*/
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#include <sys/ioctl.h>
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#include "test_util.h"
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#include "kvm_util.h"
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#include "vmx.h"
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void test_hwcr_bit(struct kvm_vcpu *vcpu, unsigned int bit)
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{
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const u64 ignored = BIT_ULL(3) | BIT_ULL(6) | BIT_ULL(8);
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u64 valid = BIT_ULL(18) | BIT_ULL(24);
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u64 val = BIT_ULL(bit);
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u64 actual;
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u64 legal;
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int r;
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if (kvm_cpu_has(X86_FEATURE_GP_ON_USER_CPUID))
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valid |= BIT_ULL(35);
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legal = ignored | valid;
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r = _vcpu_set_msr(vcpu, MSR_K7_HWCR, val);
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TEST_ASSERT(val & ~legal ? !r : r == 1,
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"Expected KVM_SET_MSRS(MSR_K7_HWCR) = 0x%lx to %s",
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val, val & ~legal ? "fail" : "succeed");
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actual = vcpu_get_msr(vcpu, MSR_K7_HWCR);
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TEST_ASSERT(actual == (val & valid),
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"Bit %u: unexpected HWCR 0x%lx; expected 0x%lx",
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bit, actual, (val & valid));
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vcpu_set_msr(vcpu, MSR_K7_HWCR, 0);
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}
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int main(int argc, char *argv[])
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{
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struct kvm_vm *vm;
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struct kvm_vcpu *vcpu;
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unsigned int bit;
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vm = vm_create_with_one_vcpu(&vcpu, NULL);
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for (bit = 0; bit < BITS_PER_LONG; bit++)
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test_hwcr_bit(vcpu, bit);
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kvm_vm_free(vm);
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}
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