Re: [PATCH] ppc32/8xx: Fix r3 trashing due to 8MB TLB page instantiation
Hi Kumar, > do we need this in arch/powerpc as well? No. At least not until these patches are applied to powerpc, as well: 8f069b1a90bd97bf6d59a02ecabf0173d9175609 [PATCH] powerpc/8xx: Use 8MB D-TLB's for kernel static mapping faults 3ea4807de7b2c5c903380ba2c2e7150bee942f42 [PATCH] powerpc/8xx: last two 8MB D-TLB entries are incorrectly set c51e078f82096a7d35ac8ec2416272e843a0e1c4 [PATCH] ppc32/8xx: Fix r3 trashing due to 8MB TLB page instantiation Thanks, Jochen ___ Linuxppc-embedded mailing list Linuxppc-embedded@ozlabs.org https://ozlabs.org/mailman/listinfo/linuxppc-embedded
Re: [PATCH] ppc32/8xx: Fix r3 trashing due to 8MB TLB page instantiation
On Aug 28, 2007, at 6:20 AM, Jochen Friedrich wrote: > Instantiation of 8MB pages on the TLB cache for the kernel static > mapping trashes r3 register on !CONFIG_8xx_CPU6 configurations. > This ensures r3 gets saved and restored. > > This has been posted to linuxppc-embedded by Marcelo Tosatti > <[EMAIL PROTECTED]>, but only an incomplete version of the patch > has been applied in c51e078f82096a7d35ac8ec2416272e843a0e1c4. > This patch adds the rest of the fix. > > Signed-off-by: Jochen Friedrich <[EMAIL PROTECTED]> > --- > arch/ppc/kernel/head_8xx.S |2 -- > 1 files changed, 0 insertions(+), 2 deletions(-) > > This can be pulled from git://git.bocc.de/dbox2.git ppc-fixes > diff --git a/arch/ppc/kernel/head_8xx.S b/arch/ppc/kernel/head_8xx.S > index 944c35c..eb8d26f 100644 > --- a/arch/ppc/kernel/head_8xx.S > +++ b/arch/ppc/kernel/head_8xx.S > @@ -495,9 +495,7 @@ LoadLargeDTLB: > lwz r11, 4(r0) > > lwz r12, 16(r0) > -#ifdef CONFIG_8xx_CPU6 > lwz r3, 8(r0) > -#endif > rfi > > /* This is the data TLB error on the MPC8xx. This could be due to do we need this in arch/powerpc as well? - k ___ Linuxppc-embedded mailing list Linuxppc-embedded@ozlabs.org https://ozlabs.org/mailman/listinfo/linuxppc-embedded
Re: [PATCH] ppc32/8xx: Fix r3 trashing due to 8MB TLB page instantiation
Please apply. On Tue, Aug 28, 2007 at 01:20:48PM +0200, Jochen Friedrich wrote: > Instantiation of 8MB pages on the TLB cache for the kernel static > mapping trashes r3 register on !CONFIG_8xx_CPU6 configurations. > This ensures r3 gets saved and restored. > > This has been posted to linuxppc-embedded by Marcelo Tosatti > <[EMAIL PROTECTED]>, but only an incomplete version of the patch > has been applied in c51e078f82096a7d35ac8ec2416272e843a0e1c4. > This patch adds the rest of the fix. > > Signed-off-by: Jochen Friedrich <[EMAIL PROTECTED]> > --- > arch/ppc/kernel/head_8xx.S |2 -- > 1 files changed, 0 insertions(+), 2 deletions(-) > > This can be pulled from git://git.bocc.de/dbox2.git ppc-fixes ___ Linuxppc-embedded mailing list Linuxppc-embedded@ozlabs.org https://ozlabs.org/mailman/listinfo/linuxppc-embedded
[PATCH] ppc32/8xx: Fix r3 trashing due to 8MB TLB page instantiation
Instantiation of 8MB pages on the TLB cache for the kernel static mapping trashes r3 register on !CONFIG_8xx_CPU6 configurations. This ensures r3 gets saved and restored. This has been posted to linuxppc-embedded by Marcelo Tosatti <[EMAIL PROTECTED]>, but only an incomplete version of the patch has been applied in c51e078f82096a7d35ac8ec2416272e843a0e1c4. This patch adds the rest of the fix. Signed-off-by: Jochen Friedrich <[EMAIL PROTECTED]> --- arch/ppc/kernel/head_8xx.S |2 -- 1 files changed, 0 insertions(+), 2 deletions(-) This can be pulled from git://git.bocc.de/dbox2.git ppc-fixes diff --git a/arch/ppc/kernel/head_8xx.S b/arch/ppc/kernel/head_8xx.S index 944c35c..eb8d26f 100644 --- a/arch/ppc/kernel/head_8xx.S +++ b/arch/ppc/kernel/head_8xx.S @@ -495,9 +495,7 @@ LoadLargeDTLB: lwz r11, 4(r0) lwz r12, 16(r0) -#ifdef CONFIG_8xx_CPU6 lwz r3, 8(r0) -#endif rfi /* This is the data TLB error on the MPC8xx. This could be due to ___ Linuxppc-embedded mailing list Linuxppc-embedded@ozlabs.org https://ozlabs.org/mailman/listinfo/linuxppc-embedded
