mirror of
https://github.com/torvalds/linux.git
synced 2026-06-03 03:53:37 +02:00
26f8453288
Use u64 instead of uint64_t to make the KVM selftests code more concise and more similar to the kernel (since selftests are primarily developed by kernel developers). This commit was generated with the following command: git ls-files tools/testing/selftests/kvm | xargs sed -i 's/uint64_t/u64/g' Then by manually adjusting whitespace to make checkpatch.pl happy. Include <linux/types.h> in include/kvm_util_types.h, iinclude/test_util.h, and include/x86/pmu.h to pick up the tools-defined u64. Arguably, all headers (especially kvm_util_types.h) should have already been including stdint.h to get uint64_t from the libc headers, but the missing dependency only rears its head once KVM uses u64 instead of uint64_t. No functional change intended. Signed-off-by: David Matlack <dmatlack@google.com> [sean: rename pread_uint64() => pread_u64, expand on types.h include] Link: https://patch.msgid.link/20260420212004.3938325-5-seanjc@google.com Signed-off-by: Sean Christopherson <seanjc@google.com>
55 lines
1.4 KiB
C
55 lines
1.4 KiB
C
// SPDX-License-Identifier: GPL-2.0
|
|
/*
|
|
* Copyright (C) 2019, Google LLC.
|
|
*
|
|
* Tests for the IA32_XSS MSR.
|
|
*/
|
|
#include <sys/ioctl.h>
|
|
|
|
#include "test_util.h"
|
|
#include "kvm_util.h"
|
|
#include "vmx.h"
|
|
|
|
#define MSR_BITS 64
|
|
|
|
int main(int argc, char *argv[])
|
|
{
|
|
bool xss_in_msr_list;
|
|
struct kvm_vm *vm;
|
|
struct kvm_vcpu *vcpu;
|
|
u64 xss_val;
|
|
int i, r;
|
|
|
|
/* Create VM */
|
|
vm = vm_create_with_one_vcpu(&vcpu, NULL);
|
|
|
|
TEST_REQUIRE(kvm_cpu_has(X86_FEATURE_XSAVES));
|
|
|
|
xss_val = vcpu_get_msr(vcpu, MSR_IA32_XSS);
|
|
TEST_ASSERT(xss_val == 0,
|
|
"MSR_IA32_XSS should be initialized to zero");
|
|
|
|
vcpu_set_msr(vcpu, MSR_IA32_XSS, xss_val);
|
|
|
|
/*
|
|
* At present, KVM only supports a guest IA32_XSS value of 0. Verify
|
|
* that trying to set the guest IA32_XSS to an unsupported value fails.
|
|
* Also, in the future when a non-zero value succeeds check that
|
|
* IA32_XSS is in the list of MSRs to save/restore.
|
|
*/
|
|
xss_in_msr_list = kvm_msr_is_in_save_restore_list(MSR_IA32_XSS);
|
|
for (i = 0; i < MSR_BITS; ++i) {
|
|
r = _vcpu_set_msr(vcpu, MSR_IA32_XSS, 1ull << i);
|
|
|
|
/*
|
|
* Setting a list of MSRs returns the entry that "faulted", or
|
|
* the last entry +1 if all MSRs were successfully written.
|
|
*/
|
|
TEST_ASSERT(!r || r == 1, KVM_IOCTL_ERROR(KVM_SET_MSRS, r));
|
|
TEST_ASSERT(r != 1 || xss_in_msr_list,
|
|
"IA32_XSS was able to be set, but was not in save/restore list");
|
|
}
|
|
|
|
kvm_vm_free(vm);
|
|
}
|