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67730e6c53
Use the kernel's canonical $(ARCH) paths instead of the raw target triple for KVM selftests directories. KVM selftests are quite nearly the only place in the entire kernel that using the target triple for directories, tools/testing/selftests/drivers/s390x being the lone holdout. Using the kernel's preferred nomenclature eliminates the minor, but annoying, friction of having to translate to KVM's selftests directories, e.g. for pattern matching, opening files, running selftests, etc. Opportunsitically delete file comments that reference the full path of the file, as they are obviously prone to becoming stale, and serve no known purpose. Reviewed-by: Muhammad Usama Anjum <usama.anjum@collabora.com> Acked-by: Claudio Imbrenda <imbrenda@linux.ibm.com> Acked-by: Andrew Jones <ajones@ventanamicro.com> Link: https://lore.kernel.org/r/20241128005547.4077116-16-seanjc@google.com Signed-off-by: Sean Christopherson <seanjc@google.com>
54 lines
1.4 KiB
C
54 lines
1.4 KiB
C
// SPDX-License-Identifier: GPL-2.0
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/*
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* Copyright (C) 2019, Google LLC.
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*
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* Tests for the IA32_XSS MSR.
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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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#define MSR_BITS 64
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int main(int argc, char *argv[])
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{
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bool xss_in_msr_list;
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struct kvm_vm *vm;
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struct kvm_vcpu *vcpu;
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uint64_t xss_val;
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int i, r;
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/* Create VM */
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vm = vm_create_with_one_vcpu(&vcpu, NULL);
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TEST_REQUIRE(kvm_cpu_has(X86_FEATURE_XSAVES));
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xss_val = vcpu_get_msr(vcpu, MSR_IA32_XSS);
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TEST_ASSERT(xss_val == 0,
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"MSR_IA32_XSS should be initialized to zero");
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vcpu_set_msr(vcpu, MSR_IA32_XSS, xss_val);
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/*
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* At present, KVM only supports a guest IA32_XSS value of 0. Verify
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* that trying to set the guest IA32_XSS to an unsupported value fails.
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* Also, in the future when a non-zero value succeeds check that
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* IA32_XSS is in the list of MSRs to save/restore.
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*/
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xss_in_msr_list = kvm_msr_is_in_save_restore_list(MSR_IA32_XSS);
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for (i = 0; i < MSR_BITS; ++i) {
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r = _vcpu_set_msr(vcpu, MSR_IA32_XSS, 1ull << i);
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/*
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* Setting a list of MSRs returns the entry that "faulted", or
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* the last entry +1 if all MSRs were successfully written.
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*/
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TEST_ASSERT(!r || r == 1, KVM_IOCTL_ERROR(KVM_SET_MSRS, r));
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TEST_ASSERT(r != 1 || xss_in_msr_list,
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"IA32_XSS was able to be set, but was not in save/restore list");
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}
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kvm_vm_free(vm);
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}
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