From 76442a939ef8fc062b35a890a824de203bb5bd5f Mon Sep 17 00:00:00 2001 From: Sergey Fedorov Date: Fri, 22 Apr 2016 19:08:45 +0300 Subject: tci: Make direct jump patching thread-safe Ensure direct jump patching in TCI is atomic by: * naturally aligning a location of direct jump address; * using atomic_read()/atomic_set() to load/store the address. Signed-off-by: Sergey Fedorov Signed-off-by: Sergey Fedorov Message-Id: <1461341333-19646-4-git-send-email-sergey.fedorov@linaro.org> Signed-off-by: Richard Henderson --- include/exec/exec-all.h | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) (limited to 'include/exec') diff --git a/include/exec/exec-all.h b/include/exec/exec-all.h index c75fb3ac25..d49befdba5 100644 --- a/include/exec/exec-all.h +++ b/include/exec/exec-all.h @@ -303,7 +303,7 @@ void tb_phys_invalidate(TranslationBlock *tb, tb_page_addr_t page_addr); static inline void tb_set_jmp_target1(uintptr_t jmp_addr, uintptr_t addr) { /* patch the branch destination */ - *(uint32_t *)jmp_addr = addr - (jmp_addr + 4); + atomic_set((int32_t *)jmp_addr, addr - (jmp_addr + 4)); /* no need to flush icache explicitly */ } #elif defined(_ARCH_PPC) -- cgit v1.2.3-55-g7522