Quelle  kvm_util_arch.h   Sprache: C

/* SPDX-License-Identifier: GPL-2.0-only */
#ifndef SELFTEST_KVM_UTIL_ARCH_H
#define SELFTEST_KVM_UTIL_ARCH_H

#include <stdbool.h>
#include <stdint.h>

#include "kvm_util_types.h"
#include "test_util.h"

extern bool is_forced_emulation_enabled;

struct kvm_vm_arch {
 vm_vaddr_t gdt;
 vm_vaddr_t tss;
 vm_vaddr_t idt;

 uint64_t c_bit;
 uint64_t s_bit;
 int sev_fd;
 bool is_pt_protected;
};

static inline bool __vm_arch_has_protected_memory(struct kvm_vm_arch *arch)
{
 return arch->c_bit || arch->s_bit;
}

#define vm_arch_has_protected_memory(vm) \
 __vm_arch_has_protected_memory(&(vm)->arch)

#define vcpu_arch_put_guest(mem, __val)       \
do {           \
 const typeof(mem) val = (__val);      \
           \
 if (!is_forced_emulation_enabled || guest_random_bool(&guest_rng)) {  \
  (mem) = val;        \
 } else if (guest_random_bool(&guest_rng)) {     \
  __asm__ __volatile__(KVM_FEP "mov %1, %0"    \
         : "+m" (mem)     \
         : "r" (val) : "memory");    \
 } else {         \
  uint64_t __old = READ_ONCE(mem);     \
           \
  __asm__ __volatile__(KVM_FEP LOCK_PREFIX "cmpxchg %[new], %[ptr]" \
         : [ptr] "+m" (mem), [old] "+a" (__old)  \
         : [new]"r" (val) : "memory", "cc");  \
 }          \
} while (0)

#endif  // SELFTEST_KVM_UTIL_ARCH_H