* [PATCH v2] powerpc/booke-64: fix tlbsrx. path in bolted tlb handler
@ 2014-01-10 23:30 Scott Wood
2014-01-12 23:27 ` Benjamin Herrenschmidt
0 siblings, 1 reply; 2+ messages in thread
From: Scott Wood @ 2014-01-10 23:30 UTC (permalink / raw)
To: linuxppc-dev; +Cc: Scott Wood
From: Scott Wood <scott@tyr.buserror.net>
It was branching to the cleanup part of the non-bolted handler,
which would have been bad if there were any chips with tlbsrx.
that use the bolted handler.
Signed-off-by: Scott Wood <scottwood@freescale.com>
---
v2: rebase
arch/powerpc/mm/tlb_low_64e.S | 3 ++-
1 file changed, 2 insertions(+), 1 deletion(-)
diff --git a/arch/powerpc/mm/tlb_low_64e.S b/arch/powerpc/mm/tlb_low_64e.S
index 75f5d27..16250b1 100644
--- a/arch/powerpc/mm/tlb_low_64e.S
+++ b/arch/powerpc/mm/tlb_low_64e.S
@@ -136,7 +136,7 @@ BEGIN_MMU_FTR_SECTION
*/
PPC_TLBSRX_DOT(0,R16)
ldx r14,r14,r15 /* grab pgd entry */
- beq normal_tlb_miss_done /* tlb exists already, bail */
+ beq tlb_miss_done_bolted /* tlb exists already, bail */
MMU_FTR_SECTION_ELSE
ldx r14,r14,r15 /* grab pgd entry */
ALT_MMU_FTR_SECTION_END_IFSET(MMU_FTR_USE_TLBRSRV)
@@ -192,6 +192,7 @@ ALT_MMU_FTR_SECTION_END_IFSET(MMU_FTR_USE_TLBRSRV)
mtspr SPRN_MAS7_MAS3,r15
tlbwe
+tlb_miss_done_bolted:
TLB_MISS_STATS_X(MMSTAT_TLB_MISS_NORM_OK)
tlb_epilog_bolted
rfi
--
1.8.3.2
^ permalink raw reply related [flat|nested] 2+ messages in thread
* Re: [PATCH v2] powerpc/booke-64: fix tlbsrx. path in bolted tlb handler
2014-01-10 23:30 [PATCH v2] powerpc/booke-64: fix tlbsrx. path in bolted tlb handler Scott Wood
@ 2014-01-12 23:27 ` Benjamin Herrenschmidt
0 siblings, 0 replies; 2+ messages in thread
From: Benjamin Herrenschmidt @ 2014-01-12 23:27 UTC (permalink / raw)
To: Scott Wood; +Cc: linuxppc-dev
On Fri, 2014-01-10 at 17:30 -0600, Scott Wood wrote:
> From: Scott Wood <scott@tyr.buserror.net>
>
> It was branching to the cleanup part of the non-bolted handler,
> which would have been bad if there were any chips with tlbsrx.
> that use the bolted handler.
>
> Signed-off-by: Scott Wood <scottwood@freescale.com>
> ---
> v2: rebase
Ack.
> arch/powerpc/mm/tlb_low_64e.S | 3 ++-
> 1 file changed, 2 insertions(+), 1 deletion(-)
>
> diff --git a/arch/powerpc/mm/tlb_low_64e.S b/arch/powerpc/mm/tlb_low_64e.S
> index 75f5d27..16250b1 100644
> --- a/arch/powerpc/mm/tlb_low_64e.S
> +++ b/arch/powerpc/mm/tlb_low_64e.S
> @@ -136,7 +136,7 @@ BEGIN_MMU_FTR_SECTION
> */
> PPC_TLBSRX_DOT(0,R16)
> ldx r14,r14,r15 /* grab pgd entry */
> - beq normal_tlb_miss_done /* tlb exists already, bail */
> + beq tlb_miss_done_bolted /* tlb exists already, bail */
> MMU_FTR_SECTION_ELSE
> ldx r14,r14,r15 /* grab pgd entry */
> ALT_MMU_FTR_SECTION_END_IFSET(MMU_FTR_USE_TLBRSRV)
> @@ -192,6 +192,7 @@ ALT_MMU_FTR_SECTION_END_IFSET(MMU_FTR_USE_TLBRSRV)
> mtspr SPRN_MAS7_MAS3,r15
> tlbwe
>
> +tlb_miss_done_bolted:
> TLB_MISS_STATS_X(MMSTAT_TLB_MISS_NORM_OK)
> tlb_epilog_bolted
> rfi
^ permalink raw reply [flat|nested] 2+ messages in thread
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2014-01-10 23:30 [PATCH v2] powerpc/booke-64: fix tlbsrx. path in bolted tlb handler Scott Wood
2014-01-12 23:27 ` Benjamin Herrenschmidt
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