[Qemu-devel] [RFC PATCH v13 09/21] i386: interrupt poll processing

[Pavel Dovgalyuk <Pavel.Dovgaluk@ispras.ru>]

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>
---
 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) {