> -----Original Message----- > From: Wood Scott-B07421 > Sent: Friday, June 14, 2013 12:51 AM > To: Wang Dongsheng-B40534 > Cc: Wood Scott-B07421; b...@kernel.crashing.org; > johan...@sipsolutions.net; an...@enomsg.org; ga...@kernel.crashing.org; > linuxppc-dev@lists.ozlabs.org > Subject: Re: [PATCH 1/2] powerpc: add Book E support to 64-bit > hibernation > > On 06/13/2013 04:55:43 AM, Wang Dongsheng-B40534 wrote: > > > > +#else > > > > + /* Save SPRGs */ > > > > + RESTORE_SPRG(0) > > > > + RESTORE_SPRG(1) > > > > + RESTORE_SPRG(2) > > > > + RESTORE_SPRG(3) > > > > + RESTORE_SPRG(4) > > > > + RESTORE_SPRG(5) > > > > + RESTORE_SPRG(6) > > > > + RESTORE_SPRG(7) > > > > > > Why do we need this on book3e and not on book3s? > > > > > Book3e: SPRG1 used save paca, SPRG2 be defined > > SPRN_SPRG_TLB_EXFRAME,... > > I think those register should be save, even now some SPRG register not > > be use. > > Are those expected/allowed to change as a result of the restore? > Those registers are used by software, some allowed to change. Exception handling is used in some registers, see exception-64e.h These registers can be modified and saved.
> -Scott _______________________________________________ Linuxppc-dev mailing list Linuxppc-dev@lists.ozlabs.org https://lists.ozlabs.org/listinfo/linuxppc-dev
