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Linux kernel mirror (for testing)
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1/* SPDX-License-Identifier: GPL-2.0-only */
2#ifndef SELFTEST_KVM_UTIL_ARCH_H
3#define SELFTEST_KVM_UTIL_ARCH_H
4
5#include <stdbool.h>
6#include <stdint.h>
7
8#include "kvm_util_types.h"
9#include "test_util.h"
10
11extern bool is_forced_emulation_enabled;
12
13struct kvm_vm_arch {
14 vm_vaddr_t gdt;
15 vm_vaddr_t tss;
16 vm_vaddr_t idt;
17
18 uint64_t c_bit;
19 uint64_t s_bit;
20 int sev_fd;
21 bool is_pt_protected;
22};
23
24static inline bool __vm_arch_has_protected_memory(struct kvm_vm_arch *arch)
25{
26 return arch->c_bit || arch->s_bit;
27}
28
29#define vm_arch_has_protected_memory(vm) \
30 __vm_arch_has_protected_memory(&(vm)->arch)
31
32#define vcpu_arch_put_guest(mem, __val) \
33do { \
34 const typeof(mem) val = (__val); \
35 \
36 if (!is_forced_emulation_enabled || guest_random_bool(&guest_rng)) { \
37 (mem) = val; \
38 } else if (guest_random_bool(&guest_rng)) { \
39 __asm__ __volatile__(KVM_FEP "mov %1, %0" \
40 : "+m" (mem) \
41 : "r" (val) : "memory"); \
42 } else { \
43 uint64_t __old = READ_ONCE(mem); \
44 \
45 __asm__ __volatile__(KVM_FEP LOCK_PREFIX "cmpxchg %[new], %[ptr]" \
46 : [ptr] "+m" (mem), [old] "+a" (__old) \
47 : [new]"r" (val) : "memory", "cc"); \
48 } \
49} while (0)
50
51#endif // SELFTEST_KVM_UTIL_ARCH_H