From: Becky Bruce <beckyb@kernel.crashing.org>
To: linuxppc-dev@lists.ozlabs.org
Cc: david@gibson.dropbear.id.au
Subject: [PATCH 07/13] powerpc: Add hugepage support to 64-bit tablewalk code for FSL_BOOK3E
Date: Mon, 10 Oct 2011 15:50:42 -0500 [thread overview]
Message-ID: <13182798791090-git-send-email-beckyb@kernel.crashing.org> (raw)
In-Reply-To: <13182798761457-git-send-email-beckyb@kernel.crashing.org>
From: Becky Bruce <beckyb@kernel.crashing.org>
Before hugetlb, at each level of the table, we test for
!0 to determine if we have a valid table entry. With hugetlb, this
compare becomes:
< 0 is a normal entry
0 is an invalid entry
> 0 is huge
This works because the hugepage code pulls the top bit off the entry
(which for non-huge entries always has the top bit set) as an
indicator that we have a hugepage.
Signed-off-by: Becky Bruce <beckyb@kernel.crashing.org>
---
arch/powerpc/mm/tlb_low_64e.S | 14 +++++++-------
1 files changed, 7 insertions(+), 7 deletions(-)
diff --git a/arch/powerpc/mm/tlb_low_64e.S b/arch/powerpc/mm/tlb_low_64e.S
index 71d5d9a..ff672bd 100644
--- a/arch/powerpc/mm/tlb_low_64e.S
+++ b/arch/powerpc/mm/tlb_low_64e.S
@@ -136,22 +136,22 @@ ALT_MMU_FTR_SECTION_END_IFSET(MMU_FTR_USE_TLBRSRV)
#ifndef CONFIG_PPC_64K_PAGES
rldicl r15,r16,64-PUD_SHIFT+3,64-PUD_INDEX_SIZE-3
clrrdi r15,r15,3
- cmlpdi cr0,r14,0
- beq tlb_miss_fault_bolted /* Bad pgd entry */
+ cmpdi cr0,r14,0
+ bge tlb_miss_fault_bolted /* Bad pgd entry or hugepage; bail */
ldx r14,r14,r15 /* grab pud entry */
#endif /* CONFIG_PPC_64K_PAGES */
rldicl r15,r16,64-PMD_SHIFT+3,64-PMD_INDEX_SIZE-3
clrrdi r15,r15,3
- cmpldi cr0,r14,0
- beq tlb_miss_fault_bolted
+ cmpdi cr0,r14,0
+ bge tlb_miss_fault_bolted
ldx r14,r14,r15 /* Grab pmd entry */
rldicl r15,r16,64-PAGE_SHIFT+3,64-PTE_INDEX_SIZE-3
clrrdi r15,r15,3
- cmpldi cr0,r14,0
- beq tlb_miss_fault_bolted
- ldx r14,r14,r15 /* Grab PTE */
+ cmpdi cr0,r14,0
+ bge tlb_miss_fault_bolted
+ ldx r14,r14,r15 /* Grab PTE, normal (!huge) page */
/* Check if required permissions are met */
andc. r15,r11,r14
--
1.5.6.5
next prev parent reply other threads:[~2011-10-10 20:51 UTC|newest]
Thread overview: 26+ messages / expand[flat|nested] mbox.gz Atom feed top
2011-10-10 20:50 [PATCH 0/13] Hugetlb for 64-bit Freescale Book3E Becky Bruce
2011-10-10 20:50 ` [PATCH 01/13] powerpc: Only define HAVE_ARCH_HUGETLB_UNMAPPED_AREA if PPC_MM_SLICES Becky Bruce
2011-10-10 20:50 ` [PATCH 02/13] powerpc: hugetlb: fix huge_ptep_set_access_flags return value Becky Bruce
2011-10-10 20:50 ` [PATCH 03/13] powerpc: Fix booke hugetlb preload code for PPC_MM_SLICES and 64-bit Becky Bruce
2011-10-10 20:50 ` [PATCH 04/13] powerpc: Update hugetlb huge_pte_alloc and tablewalk code for FSL BOOKE Becky Bruce
2011-10-10 20:50 ` [PATCH 05/13] powerpc: hugetlb: modify include usage for FSL BookE code Becky Bruce
2011-10-10 20:50 ` [PATCH 06/13] powerpc: Whitespace/comment changes to tlb_low_64e.S Becky Bruce
2011-10-10 20:50 ` Becky Bruce [this message]
2011-10-10 20:50 ` [PATCH 08/13] powerpc: Add gpages reservation code for 64-bit FSL BOOKE Becky Bruce
2011-10-10 20:50 ` [PATCH 09/13] powerpc: Kconfig updates for FSL BookE HUGETLB 64-bit Becky Bruce
2011-10-10 20:50 ` [PATCH 10/13] powerpc: Update mpc85xx/corenet 32-bit defconfigs Becky Bruce
2011-10-10 20:50 ` [PATCH 11/13] powerpc: Enable Hugetlb by default for 32-bit 85xx/corenet Becky Bruce
2011-10-10 20:50 ` [PATCH 12/13] powerpc: Update corenet64_smp_defconfig Becky Bruce
2011-10-10 20:50 ` [PATCH 13/13] powerpc: Enable hugetlb by default for corenet64 platforms Becky Bruce
2011-10-12 4:29 ` [PATCH 12/13] powerpc: Update corenet64_smp_defconfig Kumar Gala
2011-10-12 4:29 ` [PATCH 10/13] powerpc: Update mpc85xx/corenet 32-bit defconfigs Kumar Gala
2011-12-09 22:05 ` Tabi Timur-B04825
2011-11-29 5:25 ` [PATCH 04/13] powerpc: Update hugetlb huge_pte_alloc and tablewalk code for FSL BOOKE Benjamin Herrenschmidt
2011-11-29 16:36 ` Becky Bruce
2011-11-30 1:10 ` David Gibson
2011-11-25 0:43 ` [PATCH 03/13] powerpc: Fix booke hugetlb preload code for PPC_MM_SLICES and 64-bit Benjamin Herrenschmidt
2011-11-28 16:01 ` Kumar Gala
2011-11-28 16:54 ` Becky Bruce
2011-11-28 22:50 ` Benjamin Herrenschmidt
2011-11-29 3:58 ` [PATCH 02/13] powerpc: hugetlb: fix huge_ptep_set_access_flags return value Benjamin Herrenschmidt
2011-11-29 16:52 ` Becky Bruce
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=13182798791090-git-send-email-beckyb@kernel.crashing.org \
--to=beckyb@kernel.crashing.org \
--cc=david@gibson.dropbear.id.au \
--cc=linuxppc-dev@lists.ozlabs.org \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is an external index of several public inboxes,
see mirroring instructions on how to clone and mirror
all data and code used by this external index.