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| author | Samuel Mendoza-Jonas <sam.mj@au1.ibm.com> | 2015-07-22 11:09:15 +1000 |
|---|---|---|
| committer | Joel Stanley <joel@jms.id.au> | 2015-08-17 14:48:27 +0930 |
| commit | 8adc30a30b88c793c2058e85426f4f94158797ad (patch) | |
| tree | 382a089898523612b3340c1398b764c671810d20 | |
| parent | a8193732b435b8c7174485b9eb8201ff260e56b6 (diff) | |
| download | talos-op-linux-3.17.2-openpower1.tar.gz talos-op-linux-3.17.2-openpower1.zip | |
powerpc/kexec: Reset HILE before kexec_sequencev3.17.2-openpower1
On powernv secondary cpus are returned to OPAL, and will then enter
the target kernel in big-endian. However if it is set the HILE bit
will persist, causing the first exception in the target kernel to be
delivered in litte-endian regardless of the current endianess.
If running on top of OPAL make sure the HILE bit is reset once we've
finished waiting for all of the secondaries to be returned to OPAL.
Signed-off-by: Samuel Mendoza-Jonas <sam.mj@au1.ibm.com>
Signed-off-by: Joel Stanley <joel@jms.id.au>
| -rw-r--r-- | arch/powerpc/platforms/powernv/setup.c | 7 |
1 files changed, 7 insertions, 0 deletions
diff --git a/arch/powerpc/platforms/powernv/setup.c b/arch/powerpc/platforms/powernv/setup.c index 5a0e2dc6de5f..b19e1ab8db06 100644 --- a/arch/powerpc/platforms/powernv/setup.c +++ b/arch/powerpc/platforms/powernv/setup.c @@ -243,6 +243,13 @@ static void pnv_kexec_cpu_down(int crash_shutdown, int secondary) } else { /* Primary waits for the secondaries to have reached OPAL */ pnv_kexec_wait_secondaries_down(); + + /* + * We might be running as little-endian - now that interrupts + * are disabled, reset the HILE bit to big-endian so we don't + * take interrupts in the wrong endian later + */ + opal_reinit_cpus(OPAL_REINIT_CPUS_HILE_BE); } } #endif /* CONFIG_KEXEC */ |
