Hi Horms, > > Older big-endian ppc64 kernels don't include the FIXUP_ENDIAN check, > > meaning if we kexec from a little-endian kernel the target kernel > > will fail to boot. > > Returning to big-endian before we enter the target kernel ensures > > that the target kernel can boot whether or not it includes > > FIXUP_ENDIAN. > > > > This mirrors commit 150b14e7 in kexec-lite. > > > > Signed-off-by: Samuel Mendoza-Jonas <sam.mj at au1.ibm.com> > > I would value a review from one of the PPC folks. Looks good to me. You can add: Acked-by: Anton Blanchard <anton at samba.org> Anton > > --- > > purgatory/arch/ppc64/v2wrap.S | 12 +++++++++--- > > 1 file changed, 9 insertions(+), 3 deletions(-) > > > > diff --git a/purgatory/arch/ppc64/v2wrap.S > > b/purgatory/arch/ppc64/v2wrap.S index dc5034f..179ade9 100644 > > --- a/purgatory/arch/ppc64/v2wrap.S > > +++ b/purgatory/arch/ppc64/v2wrap.S > > @@ -114,10 +114,16 @@ master: > > LOADADDR(6,run_at_load) # the load flag > > lwz 7,0(6) # possibly patched by > > kexec-elf-ppc64 stw 7,0x5c(4) # and patch it into the > > kernel > > - li 5,0 # r5 will be 0 for kernel > > - mtctr 4 # prepare branch too > > mr 3,16 # restore dt address > > > > + mtsrr0 4 # prepare branch to > > + > > + mfmsr 5 > > + clrrdi 5,5,1 # clear MSR_LE > > + mtsrr1 5 > > + > > + li 5,0 # r5 will be 0 for kernel > > + > > # skip cache flush, do we care? > > > > - bctr # start kernel > > + rfid # update MSR and start kernel > > -- > > 2.5.0 > > > _______________________________________________ > Linuxppc-dev mailing list > Linuxppc-dev at lists.ozlabs.org > https://lists.ozlabs.org/listinfo/linuxppc-dev
