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[PATCH v1 1/2] target/ppc: PMU do not clear MMCR0[FCECE] on performance


From: Nicholas Piggin
Subject: [PATCH v1 1/2] target/ppc: PMU do not clear MMCR0[FCECE] on performance monitor alert
Date: Tue, 30 May 2023 23:43:12 +1000

FCECE does not get cleared according to the ISA v3.1B.

Signed-off-by: Nicholas Piggin <npiggin@gmail.com>
---
 target/ppc/power8-pmu.c | 1 -
 1 file changed, 1 deletion(-)

diff --git a/target/ppc/power8-pmu.c b/target/ppc/power8-pmu.c
index c4c331c6b5..af065115f2 100644
--- a/target/ppc/power8-pmu.c
+++ b/target/ppc/power8-pmu.c
@@ -289,7 +289,6 @@ static void fire_PMC_interrupt(PowerPCCPU *cpu)
     pmu_update_cycles(env);
 
     if (env->spr[SPR_POWER_MMCR0] & MMCR0_FCECE) {
-        env->spr[SPR_POWER_MMCR0] &= ~MMCR0_FCECE;
         env->spr[SPR_POWER_MMCR0] |= MMCR0_FC;
 
         /* Changing MMCR0_FC requires summaries and hflags update */
-- 
2.40.1




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