[PATCH 03/26] ppc/pnv: powerpc_excp: Do not discard HDECR exception when entering power-saving mode

[Cédric Le Goater]

The Hypervisor Decrementer exception should not be generated while the
CPU is in power-saving mode (see cpu_ppc_hdecr_excp()). However,
discarding the exception before entering the power-saving mode is
wrong since we would loose a previously generated HDEC.

Fixes: 4b236b621bf0 ("ppc: Initial HDEC support")
Signed-off-by: Cédric Le Goater <clg@kaod.org>
---

 This fixes CPU hard lockups when doing intensive I/Os on the machine. 
 
 target/ppc/excp_helper.c | 6 ------
 1 file changed, 6 deletions(-)

diff --git a/target/ppc/excp_helper.c b/target/ppc/excp_helper.c
index a79a0ed465e5..7b6ac16eef72 100644
--- a/target/ppc/excp_helper.c
+++ b/target/ppc/excp_helper.c
@@ -1211,12 +1211,6 @@ void helper_pminsn(CPUPPCState *env, powerpc_pm_insn_t 
insn)
     cs = env_cpu(env);
     cs->halted = 1;
 
-    /*
-     * The architecture specifies that HDEC interrupts are discarded
-     * in PM states
-     */
-    env->pending_interrupts &= ~(1 << PPC_INTERRUPT_HDECR);
-
     /* Condition for waking up at 0x100 */
     env->resume_as_sreset = (insn != PPC_PM_STOP) ||
         (env->spr[SPR_PSSCR] & PSSCR_EC);
-- 
2.31.1