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i386: interrupt poll processing

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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 <pavel.dovgaluk@ispras.ru>
Message-Id: <20150917162410.8676.13042.stgit@PASHA-ISP.def.inno>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
This commit is contained in:
Pavel Dovgalyuk 2015-09-17 19:24:11 +03:00 committed by Paolo Bonzini
parent 6220e900bc
commit a4fc321219
1 changed files with 3 additions and 0 deletions
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3
target-i386/seg_helper.c
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@ -1321,6 +1321,9 @@ bool x86_cpu_exec_interrupt(CPUState *cs, int interrupt_request)
if (interrupt_request & CPU_INTERRUPT_POLL) { if (interrupt_request & CPU_INTERRUPT_POLL) {
cs->interrupt_request &= ~CPU_INTERRUPT_POLL; cs->interrupt_request &= ~CPU_INTERRUPT_POLL;
apic_poll_irq(cpu->apic_state); 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 #endif
if (interrupt_request & CPU_INTERRUPT_SIPI) { if (interrupt_request & CPU_INTERRUPT_SIPI) {