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.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.c')
| -rw-r--r-- | target/ppc/translate.c | 13 |
1 files changed, 12 insertions, 1 deletions
diff --git a/target/ppc/translate.c b/target/ppc/translate.c index bffdbd9687..fde7ead7b7 100644 --- a/target/ppc/translate.c +++ b/target/ppc/translate.c @@ -3589,7 +3589,18 @@ static void gen_nap(DisasContext *ctx) static void gen_stop(DisasContext *ctx) { - gen_nap(ctx); +#if defined(CONFIG_USER_ONLY) + GEN_PRIV; +#else + TCGv_i32 t; + + CHK_HV; + t = tcg_const_i32(PPC_PM_STOP); + gen_helper_pminsn(cpu_env, t); + tcg_temp_free_i32(t); + /* Stop translation, as the CPU is supposed to sleep from now */ + gen_exception_nip(ctx, EXCP_HLT, ctx->base.pc_next); +#endif /* defined(CONFIG_USER_ONLY) */ } static void gen_sleep(DisasContext *ctx) |