diff options
Diffstat (limited to 'tools/testing/selftests/kvm/include/x86_64/kvm_util_arch.h')
| -rw-r--r-- | tools/testing/selftests/kvm/include/x86_64/kvm_util_arch.h | 28 |
1 files changed, 28 insertions, 0 deletions
diff --git a/tools/testing/selftests/kvm/include/x86_64/kvm_util_arch.h b/tools/testing/selftests/kvm/include/x86_64/kvm_util_arch.h index 9f1725192aa2..972bb1c4ab4c 100644 --- a/tools/testing/selftests/kvm/include/x86_64/kvm_util_arch.h +++ b/tools/testing/selftests/kvm/include/x86_64/kvm_util_arch.h @@ -5,7 +5,16 @@ #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; @@ -20,4 +29,23 @@ static inline bool __vm_arch_has_protected_memory(struct kvm_vm_arch *arch) #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 |