tjh.dev
Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
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1/* SPDX-License-Identifier: GPL-2.0-only */
2/*
3 * tools/testing/selftests/kvm/include/x86_64/svm_utils.h
4 * Header for nested SVM testing
5 *
6 * Copyright (C) 2020, Red Hat, Inc.
7 */
8
9#ifndef SELFTEST_KVM_SVM_UTILS_H
10#define SELFTEST_KVM_SVM_UTILS_H
11
12#include <stdint.h>
13#include "svm.h"
14#include "processor.h"
15
16#define CPUID_SVM_BIT 2
17#define CPUID_SVM BIT_ULL(CPUID_SVM_BIT)
18
19#define SVM_EXIT_VMMCALL 0x081
20
21struct svm_test_data {
22 /* VMCB */
23 struct vmcb *vmcb; /* gva */
24 void *vmcb_hva;
25 uint64_t vmcb_gpa;
26
27 /* host state-save area */
28 struct vmcb_save_area *save_area; /* gva */
29 void *save_area_hva;
30 uint64_t save_area_gpa;
31};
32
33struct svm_test_data *vcpu_alloc_svm(struct kvm_vm *vm, vm_vaddr_t *p_svm_gva);
34void generic_svm_setup(struct svm_test_data *svm, void *guest_rip, void *guest_rsp);
35void run_guest(struct vmcb *vmcb, uint64_t vmcb_gpa);
36bool nested_svm_supported(void);
37void nested_svm_check_supported(void);
38
39static inline bool cpu_has_svm(void)
40{
41 u32 eax = 0x80000001, ecx;
42
43 asm("cpuid" :
44 "=a" (eax), "=c" (ecx) : "0" (eax) : "ebx", "edx");
45
46 return ecx & CPUID_SVM;
47}
48
49int open_sev_dev_path_or_exit(void);
50
51#endif /* SELFTEST_KVM_SVM_UTILS_H */