From a4fc321219cc1c6bd5ca1262cdbbb2e8cee8d56e Mon Sep 17 00:00:00 2001 From: Pavel Dovgalyuk Date: Thu, 17 Sep 2015 19:24:11 +0300 Subject: [PATCH] i386: interrupt poll processing 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 Message-Id: <20150917162410.8676.13042.stgit@PASHA-ISP.def.inno> Signed-off-by: Paolo Bonzini --- target-i386/seg_helper.c | 3 +++ 1 file changed, 3 insertions(+) diff --git a/target-i386/seg_helper.c b/target-i386/seg_helper.c index 1a3a2e7573..1cbe559366 100644 --- a/target-i386/seg_helper.c +++ b/target-i386/seg_helper.c @@ -1321,6 +1321,9 @@ 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) {