diff options
| author | Benjamin Herrenschmidt <benh@kernel.crashing.org> | 2019-02-15 17:16:41 +0100 |
|---|---|---|
| committer | David Gibson <david@gibson.dropbear.id.au> | 2019-02-26 09:21:24 +1100 |
| commit | 21c0d66a9c994c7a406f8a6d04a81c16332e0cb8 (patch) | |
| tree | 0d1b07c7487dac2d856c7f4ca1078f9ca081b38d /target/ppc/translate_init.inc.c | |
| parent | 3621e2c96082c6e5094dfec244077a135383d538 (diff) | |
target/ppc: Fix support for "STOP light" states on POWER9
STOP must act differently based on PSSCR:EC on POWER9. When set, it
acts like the P7/P8 power management instructions and wake up at 0x100
based on the wakeup conditions in LPCR.
When PSSCR:EC is clear however it will wakeup at the next instruction
after STOP (if EE is clear) or take the corresponding interrupts (if
EE is set).
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Signed-off-by: Cédric Le Goater <clg@kaod.org>
Reviewed-by: David Gibson <david@gibson.dropbear.id.au>
Message-Id: <20190215161648.9600-4-clg@kaod.org>
Signed-off-by: David Gibson <david@gibson.dropbear.id.au>
Diffstat (limited to 'target/ppc/translate_init.inc.c')
| -rw-r--r-- | target/ppc/translate_init.inc.c | 7 |
1 files changed, 7 insertions, 0 deletions
diff --git a/target/ppc/translate_init.inc.c b/target/ppc/translate_init.inc.c index d884906004..8b1d324b3b 100644 --- a/target/ppc/translate_init.inc.c +++ b/target/ppc/translate_init.inc.c @@ -8801,9 +8801,16 @@ static bool cpu_has_work_POWER9(CPUState *cs) CPUPPCState *env = &cpu->env; if (cs->halted) { + uint64_t psscr = env->spr[SPR_PSSCR]; + if (!(cs->interrupt_request & CPU_INTERRUPT_HARD)) { return false; } + + /* If EC is clear, just return true on any pending interrupt */ + if (!(psscr & PSSCR_EC)) { + return true; + } /* External Exception */ if ((env->pending_interrupts & (1u << PPC_INTERRUPT_EXT)) && (env->spr[SPR_LPCR] & LPCR_EEE)) { |