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target/ppc: Fix support for "STOP light" states on POWER9

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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>
This commit is contained in:
Benjamin Herrenschmidt 2019-02-15 17:16:41 +01:00 • committed by David Gibson
parent 3621e2c960
commit 21c0d66a9c
5 changed files with 35 additions and 6 deletions
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1
target/ppc/cpu-qom.h
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@ -122,6 +122,7 @@ typedef enum {
PPC_PM_NAP,
PPC_PM_SLEEP,
PPC_PM_RVWINKLE,
PPC_PM_STOP,
} powerpc_pm_insn_t;
/*****************************************************************************/