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ppc/pnv: powerpc_excp: Do not discard HDECR exception when entering power-saving mode 

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: 4b236b621b ("ppc: Initial HDEC support")
Signed-off-by: Cédric Le Goater <clg@kaod.org>
Message-Id: <20210809134547.689560-4-clg@kaod.org>
Signed-off-by: David Gibson <david@gibson.dropbear.id.au>
This commit is contained in:
Cédric Le Goater 2021-08-09 15:45:24 +02:00 committed by David Gibson
parent 6bc8c04648
commit c944a3ba7b
1 changed files with 0 additions and 6 deletions
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6
target/ppc/excp_helper.c
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@ -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);