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[Qemu-devel] [RFC PATCH v12 09/21] i386: interrupt poll processing
From: |
Pavel Dovgalyuk |
Subject: |
[Qemu-devel] [RFC PATCH v12 09/21] i386: interrupt poll processing |
Date: |
Tue, 05 May 2015 13:18:26 +0300 |
User-agent: |
StGit/0.16 |
This patch updates x86_cpu_exec_interrupt function.
It can process two interrupt request at a time (poll and another one).
This makes its execution non-deterministic. Determinism is requred
for recorded icount execution.
Signed-off-by: Pavel Dovgalyuk <address@hidden>
---
target-i386/seg_helper.c | 3 +++
1 files changed, 3 insertions(+), 0 deletions(-)
diff --git a/target-i386/seg_helper.c b/target-i386/seg_helper.c
index 2bc757a..92a49b3 100644
--- a/target-i386/seg_helper.c
+++ b/target-i386/seg_helper.c
@@ -1294,6 +1294,9 @@ bool x86_cpu_exec_interrupt(CPUState *cs, int
interrupt_request)
if (interrupt_request & CPU_INTERRUPT_POLL) {
cs->interrupt_request &= ~CPU_INTERRUPT_POLL;
apic_poll_irq(cpu->apic_state);
+ /* Don't process multiple interrupt requests in a single call.
+ This is required to make icount-driven execution deterministic. */
+ return true;
}
#endif
if (interrupt_request & CPU_INTERRUPT_SIPI) {
- [Qemu-devel] [RFC PATCH v12 00/21] Deterministic replay core, Pavel Dovgalyuk, 2015/05/05
- [Qemu-devel] [RFC PATCH v12 01/21] i386: partial revert of interrupt poll fix, Pavel Dovgalyuk, 2015/05/05
- [Qemu-devel] [RFC PATCH v12 02/21] replay: global variables and function stubs, Pavel Dovgalyuk, 2015/05/05
- [Qemu-devel] [RFC PATCH v12 03/21] sysemu: system functions for replay, Pavel Dovgalyuk, 2015/05/05
- [Qemu-devel] [RFC PATCH v12 04/21] replay: internal functions for replay log, Pavel Dovgalyuk, 2015/05/05
- [Qemu-devel] [RFC PATCH v12 05/21] replay: introduce mutex to protect the replay log, Pavel Dovgalyuk, 2015/05/05
- [Qemu-devel] [RFC PATCH v12 06/21] replay: introduce icount event, Pavel Dovgalyuk, 2015/05/05
- [Qemu-devel] [RFC PATCH v12 07/21] cpu-exec: allow temporary disabling icount, Pavel Dovgalyuk, 2015/05/05
- [Qemu-devel] [RFC PATCH v12 08/21] cpu: replay instructions sequence, Pavel Dovgalyuk, 2015/05/05
- [Qemu-devel] [RFC PATCH v12 09/21] i386: interrupt poll processing,
Pavel Dovgalyuk <=
- [Qemu-devel] [RFC PATCH v12 10/21] replay: interrupts and exceptions, Pavel Dovgalyuk, 2015/05/05
- [Qemu-devel] [RFC PATCH v12 11/21] replay: asynchronous events infrastructure, Pavel Dovgalyuk, 2015/05/05
- [Qemu-devel] [RFC PATCH v12 12/21] replay: recording and replaying clock ticks, Pavel Dovgalyuk, 2015/05/05
- [Qemu-devel] [RFC PATCH v12 13/21] replay: shutdown event, Pavel Dovgalyuk, 2015/05/05
- [Qemu-devel] [RFC PATCH v12 14/21] replay: checkpoints, Pavel Dovgalyuk, 2015/05/05
- [Qemu-devel] [RFC PATCH v12 15/21] aio: replace stack of bottom halves with queue, Pavel Dovgalyuk, 2015/05/05
- [Qemu-devel] [RFC PATCH v12 16/21], Pavel Dovgalyuk, 2015/05/05