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| author | Samuel Mendoza-Jonas <sam.mj@au1.ibm.com> | 2015-07-22 07:50:50 +0200 |
|---|---|---|
| committer | Michael Ellerman <mpe@ellerman.id.au> | 2015-08-20 10:19:08 +0200 |
| commit | ffebf5f391dfa9da3e086abad3eef7d3e5300249 (patch) | |
| tree | 2a539dab5f43d90b47f1f1ab03e4fc0869f6c6a9 | |
| parent | powerpc/hvsi: Fix endianness issues in the HVSI driver (diff) | |
| download | linux-ffebf5f391dfa9da3e086abad3eef7d3e5300249.tar.xz linux-ffebf5f391dfa9da3e086abad3eef7d3e5300249.zip | |
powerpc/kexec: Reset secondary cpu endianness before kexec
If the target kernel does not inlcude the FIXUP_ENDIAN check, coming
from a different-endian kernel will cause the target kernel to panic.
All ppc64 kernels can handle starting in big-endian mode, so return to
big-endian before branching into the target kernel.
This mainly affects pseries as secondaries on powernv are returned to
OPAL.
Signed-off-by: Samuel Mendoza-Jonas <sam.mj@au1.ibm.com>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
| -rw-r--r-- | arch/powerpc/kernel/misc_64.S | 13 |
1 files changed, 11 insertions, 2 deletions
diff --git a/arch/powerpc/kernel/misc_64.S b/arch/powerpc/kernel/misc_64.S index 4e314b90c75d..6e4168cf4698 100644 --- a/arch/powerpc/kernel/misc_64.S +++ b/arch/powerpc/kernel/misc_64.S @@ -475,9 +475,18 @@ _GLOBAL(kexec_wait) #ifdef CONFIG_KEXEC /* use no memory without kexec */ lwz r4,0(r5) cmpwi 0,r4,0 - bnea 0x60 + beq 99b +#ifdef CONFIG_PPC_BOOK3S_64 + li r10,0x60 + mfmsr r11 + clrrdi r11,r11,1 /* Clear MSR_LE */ + mtsrr0 r10 + mtsrr1 r11 + rfid +#else + ba 0x60 +#endif #endif - b 99b /* this can be in text because we won't change it until we are * running in real anyways |