On Apr 15, 2011, at 3:32 AM, Michael Ellerman wrote: > From: Benjamin Herrenschmidt <b...@kernel.crashing.org> > > An erratum on A2 can lead to the bolted entry we insert for the linear > mapping being evicted, to avoid that write the bolted entry to way 3. > > Signed-off-by: Benjamin Herrenschmidt <b...@kernel.crashing.org> > Signed-off-by: Michael Ellerman <mich...@ellerman.id.au> > --- > arch/powerpc/kernel/exceptions-64e.S | 5 +++-- > 1 files changed, 3 insertions(+), 2 deletions(-) > > diff --git a/arch/powerpc/kernel/exceptions-64e.S > b/arch/powerpc/kernel/exceptions-64e.S > index 5c43063..e6c0926 100644 > --- a/arch/powerpc/kernel/exceptions-64e.S > +++ b/arch/powerpc/kernel/exceptions-64e.S > @@ -864,8 +864,9 @@ have_hes: > * that will have to be made dependent on whether we are running under > * a hypervisor I suppose. > */ > - ori r3,r3,MAS0_HES | MAS0_WQ_ALLWAYS > - mtspr SPRN_MAS0,r3 > + ori r11,r3,MAS0_WQ_ALLWAYS > + oris r11,r11,MAS0_ESEL(3)@h /* Use way 3: workaround A2 erratum 376 > */ > + mtspr SPRN_MAS0,r11 > lis r3,(MAS1_VALID | MAS1_IPROT)@h > ori r3,r3,BOOK3E_PAGESZ_1GB << MAS1_TSIZE_SHIFT > mtspr SPRN_MAS1,r3
Seems like this should have a MMU Feature bit or something for A2. - k _______________________________________________ Linuxppc-dev mailing list Linuxppc-dev@lists.ozlabs.org https://lists.ozlabs.org/listinfo/linuxppc-dev
