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[Qemu-devel] [PATCH for-4.2 14/14] icount: clean up cpu_can_io before ju
From: |
Pavel Dovgalyuk |
Subject: |
[Qemu-devel] [PATCH for-4.2 14/14] icount: clean up cpu_can_io before jumping to the next block |
Date: |
Wed, 24 Jul 2019 11:44:32 +0300 |
User-agent: |
StGit/0.17.1-dirty |
From: Pavel Dovgalyuk <address@hidden>
Most of IO instructions can be executed only at the end of the block in
icount mode. Therefore translator can set cpu_can_io flag when translating
the last instruction.
But when the blocks are chained, then this flag is not reset and may
remain set at the beginning of the next block.
This patch resets the flag before "chaining" the translation blocks.
Signed-off-by: Pavel Dovgalyuk <address@hidden>
---
accel/tcg/tcg-runtime.c | 2 ++
1 file changed, 2 insertions(+)
diff --git a/accel/tcg/tcg-runtime.c b/accel/tcg/tcg-runtime.c
index 8a1e408e31..fe6b83d0fc 100644
--- a/accel/tcg/tcg-runtime.c
+++ b/accel/tcg/tcg-runtime.c
@@ -151,6 +151,8 @@ void *HELPER(lookup_tb_ptr)(CPUArchState *env)
target_ulong cs_base, pc;
uint32_t flags;
+ /* We are going to jump to the next block. can_do_io should be reset */
+ cpu->can_do_io = !use_icount;
tb = tb_lookup__cpu_state(cpu, &pc, &cs_base, &flags, curr_cflags());
if (tb == NULL) {
return tcg_ctx->code_gen_epilogue;
- [Qemu-devel] [PATCH for-4.2 06/14] replay: finish record/replay before closing the disks, (continued)
- [Qemu-devel] [PATCH for-4.2 06/14] replay: finish record/replay before closing the disks, Pavel Dovgalyuk, 2019/07/24
- [Qemu-devel] [PATCH for-4.2 07/14] replay: provide an accessor for rr filename, Pavel Dovgalyuk, 2019/07/24
- [Qemu-devel] [PATCH for-4.2 08/14] replay: add BH oneshot event for block layer, Pavel Dovgalyuk, 2019/07/24
- [Qemu-devel] [PATCH for-4.2 09/14] replay: document development rules, Pavel Dovgalyuk, 2019/07/24
- [Qemu-devel] [PATCH for-4.2 10/14] util/qemu-timer: refactor deadline calculation for external timers, Pavel Dovgalyuk, 2019/07/24
- [Qemu-devel] [PATCH for-4.2 11/14] replay: fix replay shutdown, Pavel Dovgalyuk, 2019/07/24
- [Qemu-devel] [PATCH for-4.2 12/14] replay: refine replay-time module, Pavel Dovgalyuk, 2019/07/24
- [Qemu-devel] [PATCH for-4.2 13/14] replay: rename step-related variables and functions, Pavel Dovgalyuk, 2019/07/24
- [Qemu-devel] [PATCH for-4.2 14/14] icount: clean up cpu_can_io before jumping to the next block,
Pavel Dovgalyuk <=
- Re: [Qemu-devel] [PATCH for-4.2 00/14] Some record/replay fixes, Paolo Bonzini, 2019/07/24