[PATCH V3 2/2] powerpc/kexec: Reset HILE before entering target kernel
benh at kernel.crashing.org
Fri Jul 17 13:34:59 AEST 2015
On Fri, 2015-07-17 at 11:53 +1000, Benjamin Herrenschmidt wrote:
> On Fri, 2015-07-10 at 15:19 +1000, Samuel Mendoza-Jonas wrote:
> > +#if defined(CONFIG_PPC_BOOK3S_64) && defined(CONFIG_PPC_POWERNV)
> > + li r3,(FW_FEATURE_OPAL >> 16)
> > + rldicr r3,r3,16,63
> > + and. r3,r3,r26
> > + cmpwi r3,0
> > + beq 99f
> If FW_FEATRURE_OPAL is 0x80000000 then the li will sign extend.
> The rldicr has a mask of all F's so it will keep all the bits you
> don't care about.
Even better, you should be able to just do it all in C in
pnv_kexec_cpu_down(), after we wait for secondaries to
be in OPAL. At that point interrupts are already off, so
it should be all good.
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