target-mips: fix host CPU consumption when guest is idle
When the CPU is in wait state, do not wake-up if an interrupt can't be
taken. This avoid host CPU running at 100% if a device (e.g. timer) has
an interrupt line left enabled.
Also factorize code to check if interrupts are enabled in
cpu_mips_hw_interrupts_pending().
Based on a patch from Edgar E. Iglesias <[email protected]>
Signed-off-by: Aurelien Jarno <[email protected]>
Acked-by: Edgar E. Iglesias <[email protected]>
diff --git a/cpu-exec.c b/cpu-exec.c
index 39e5eea..8c9fb8b 100644
--- a/cpu-exec.c
+++ b/cpu-exec.c
@@ -454,11 +454,7 @@
}
#elif defined(TARGET_MIPS)
if ((interrupt_request & CPU_INTERRUPT_HARD) &&
- cpu_mips_hw_interrupts_pending(env) &&
- (env->CP0_Status & (1 << CP0St_IE)) &&
- !(env->CP0_Status & (1 << CP0St_EXL)) &&
- !(env->CP0_Status & (1 << CP0St_ERL)) &&
- !(env->hflags & MIPS_HFLAG_DM)) {
+ cpu_mips_hw_interrupts_pending(env)) {
/* Raise it */
env->exception_index = EXCP_EXT_INTERRUPT;
env->error_code = 0;
