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[Qemu-devel] [PATCH 10/11] tcg/mips: Make direct jump patching thread-sa
From: |
Sergey Fedorov |
Subject: |
[Qemu-devel] [PATCH 10/11] tcg/mips: Make direct jump patching thread-safe |
Date: |
Thu, 7 Apr 2016 18:53:52 +0300 |
From: Sergey Fedorov <address@hidden>
Ensure direct jump patching in MIPS is atomic by using
atomic_read()/atomic_set() for code patching.
Signed-off-by: Sergey Fedorov <address@hidden>
Signed-off-by: Sergey Fedorov <address@hidden>
---
tcg/mips/tcg-target.inc.c | 3 ++-
1 file changed, 2 insertions(+), 1 deletion(-)
diff --git a/tcg/mips/tcg-target.inc.c b/tcg/mips/tcg-target.inc.c
index 682e19897db0..e65835d2096b 100644
--- a/tcg/mips/tcg-target.inc.c
+++ b/tcg/mips/tcg-target.inc.c
@@ -1886,6 +1886,7 @@ static void tcg_target_init(TCGContext *s)
void tb_set_jmp_target1(uintptr_t jmp_addr, uintptr_t addr)
{
uint32_t *ptr = (uint32_t *)jmp_addr;
- *ptr = deposit32(*ptr, 0, 26, addr >> 2);
+ uint32_t insn = atomic_read(ptr);
+ atomic_write(ptr, deposit32(insn, 0, 26, addr >> 2));
flush_icache_range(jmp_addr, jmp_addr + 4);
}
--
2.8.1
- Re: [Qemu-devel] [PATCH 07/11] tcg/arm: Make direct jump patching thread-safe, (continued)
- [Qemu-devel] [PATCH 04/11] tcg/ppc: Make direct jump patching thread-safe, Sergey Fedorov, 2016/04/07
- [Qemu-devel] [PATCH 11/11] tcg: Note requirement on atomic direct jump patching, Sergey Fedorov, 2016/04/07
- [Qemu-devel] [PATCH 08/11] tcg/aarch64: Make direct jump patching thread-safe, Sergey Fedorov, 2016/04/07
- [Qemu-devel] [PATCH 09/11] tcg/sparc: Make direct jump patching thread-safe, Sergey Fedorov, 2016/04/07
- [Qemu-devel] [PATCH 10/11] tcg/mips: Make direct jump patching thread-safe,
Sergey Fedorov <=
- Re: [Qemu-devel] [PATCH 00/11] tcg: Make direct jump patching thread-safe, Sergey Fedorov, 2016/04/07
- Re: [Qemu-devel] [PATCH 00/11] tcg: Make direct jump patching thread-safe, Alex Bennée, 2016/04/20