diff options
Diffstat (limited to 'include/accel/tcg/cpu-ldst.h')
| -rw-r--r-- | include/accel/tcg/cpu-ldst.h | 34 |
1 files changed, 0 insertions, 34 deletions
diff --git a/include/accel/tcg/cpu-ldst.h b/include/accel/tcg/cpu-ldst.h index f97a730703..44a62b54da 100644 --- a/include/accel/tcg/cpu-ldst.h +++ b/include/accel/tcg/cpu-ldst.h @@ -526,38 +526,4 @@ void *tlb_vaddr_to_host(CPUArchState *env, vaddr addr, MMUAccessType access_type, int mmu_idx); #endif -/* - * For user-only, helpers that use guest to host address translation - * must protect the actual host memory access by recording 'retaddr' - * for the signal handler. This is required for a race condition in - * which another thread unmaps the page between a probe and the - * actual access. - */ -#ifdef CONFIG_USER_ONLY -extern __thread uintptr_t helper_retaddr; - -static inline void set_helper_retaddr(uintptr_t ra) -{ - helper_retaddr = ra; - /* - * Ensure that this write is visible to the SIGSEGV handler that - * may be invoked due to a subsequent invalid memory operation. - */ - signal_barrier(); -} - -static inline void clear_helper_retaddr(void) -{ - /* - * Ensure that previous memory operations have succeeded before - * removing the data visible to the signal handler. - */ - signal_barrier(); - helper_retaddr = 0; -} -#else -#define set_helper_retaddr(ra) do { } while (0) -#define clear_helper_retaddr() do { } while (0) -#endif - #endif /* ACCEL_TCG_CPU_LDST_H */ |