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 
21 struct 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 
33 struct svm_test_data *vcpu_alloc_svm(struct kvm_vm *vm, vm_vaddr_t *p_svm_gva);
34 void generic_svm_setup(struct svm_test_data *svm, void *guest_rip, void *guest_rsp);
35 void run_guest(struct vmcb *vmcb, uint64_t vmcb_gpa);
36 bool nested_svm_supported(void);
37 void nested_svm_check_supported(void);
38 
39 static 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 
49 int open_sev_dev_path_or_exit(void);
50 
51 #endif /* SELFTEST_KVM_SVM_UTILS_H */
52