From: "Aneesh Kumar K.V" <aneesh.kumar@linux.vnet.ibm.com>
To: benh@kernel.crashing.org, paulus@samba.org,
David Gibson <dwg@au1.ibm.com>
Cc: linuxppc-dev@lists.ozlabs.org,
"Aneesh Kumar K.V" <aneesh.kumar@linux.vnet.ibm.com>
Subject: [PATCH -V6 03/27] powerpc: Don't hard code the size of pte page
Date: Mon, 22 Apr 2013 15:30:37 +0530 [thread overview]
Message-ID: <1366624861-24948-4-git-send-email-aneesh.kumar@linux.vnet.ibm.com> (raw)
In-Reply-To: <1366624861-24948-1-git-send-email-aneesh.kumar@linux.vnet.ibm.com>
From: "Aneesh Kumar K.V" <aneesh.kumar@linux.vnet.ibm.com>
USE PTRS_PER_PTE to indicate the size of pte page. To support THP,
later patches will be changing PTRS_PER_PTE value.
Acked-by: Paul Mackerras <paulus@samba.org>
Signed-off-by: Aneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com>
---
arch/powerpc/include/asm/pgtable.h | 6 ++++++
arch/powerpc/mm/hash_low_64.S | 4 ++--
2 files changed, 8 insertions(+), 2 deletions(-)
diff --git a/arch/powerpc/include/asm/pgtable.h b/arch/powerpc/include/asm/pgtable.h
index a9cbd3b..4b52726 100644
--- a/arch/powerpc/include/asm/pgtable.h
+++ b/arch/powerpc/include/asm/pgtable.h
@@ -17,6 +17,12 @@ struct mm_struct;
# include <asm/pgtable-ppc32.h>
#endif
+/*
+ * We save the slot number & secondary bit in the second half of the
+ * PTE page. We use the 8 bytes per each pte entry.
+ */
+#define PTE_PAGE_HIDX_OFFSET (PTRS_PER_PTE * 8)
+
#ifndef __ASSEMBLY__
#include <asm/tlbflush.h>
diff --git a/arch/powerpc/mm/hash_low_64.S b/arch/powerpc/mm/hash_low_64.S
index 7443481..abdd5e2 100644
--- a/arch/powerpc/mm/hash_low_64.S
+++ b/arch/powerpc/mm/hash_low_64.S
@@ -490,7 +490,7 @@ END_FTR_SECTION(CPU_FTR_NOEXECUTE|CPU_FTR_COHERENT_ICACHE, CPU_FTR_NOEXECUTE)
beq htab_inval_old_hpte
ld r6,STK_PARAM(R6)(r1)
- ori r26,r6,0x8000 /* Load the hidx mask */
+ ori r26,r6,PTE_PAGE_HIDX_OFFSET /* Load the hidx mask. */
ld r26,0(r26)
addi r5,r25,36 /* Check actual HPTE_SUB bit, this */
rldcr. r0,r31,r5,0 /* must match pgtable.h definition */
@@ -607,7 +607,7 @@ htab_pte_insert_ok:
sld r4,r4,r5
andc r26,r26,r4
or r26,r26,r3
- ori r5,r6,0x8000
+ ori r5,r6,PTE_PAGE_HIDX_OFFSET
std r26,0(r5)
lwsync
std r30,0(r6)
--
1.7.10
next prev parent reply other threads:[~2013-04-22 10:01 UTC|newest]
Thread overview: 39+ messages / expand[flat|nested] mbox.gz Atom feed top
2013-04-22 10:00 [PATCH -V6 00/27] THP support for PPC64 Aneesh Kumar K.V
2013-04-22 10:00 ` [PATCH -V6 01/27] powerpc: Use signed formatting when printing error Aneesh Kumar K.V
2013-04-22 10:00 ` [PATCH -V6 02/27] powerpc: Save DAR and DSISR in pt_regs on MCE Aneesh Kumar K.V
2013-04-22 10:00 ` Aneesh Kumar K.V [this message]
2013-04-22 10:00 ` [PATCH -V6 04/27] powerpc: Don't truncate pgd_index wrongly Aneesh Kumar K.V
2013-04-22 10:00 ` [PATCH -V6 05/27] powerpc: New hugepage directory format Aneesh Kumar K.V
2013-04-23 7:01 ` Paul Mackerras
2013-04-23 8:42 ` Aneesh Kumar K.V
2013-04-24 5:47 ` Paul Mackerras
2013-04-25 6:00 ` Aneesh Kumar K.V
2013-04-22 10:00 ` [PATCH -V6 06/27] powerpc: Switch 16GB and 16MB explicit hugepages to a different page table format Aneesh Kumar K.V
2013-04-22 10:00 ` [PATCH -V6 07/27] powerpc: Reduce the PTE_INDEX_SIZE Aneesh Kumar K.V
2013-04-22 10:00 ` [PATCH -V6 08/27] powerpc: Move the pte free routines from common header Aneesh Kumar K.V
2013-04-22 10:00 ` [PATCH -V6 09/27] powerpc: Reduce PTE table memory wastage Aneesh Kumar K.V
2013-04-22 10:00 ` [PATCH -V6 10/27] powerpc: Use encode avpn where we need only avpn values Aneesh Kumar K.V
2013-04-22 10:00 ` [PATCH -V6 11/27] powerpc: Decode the pte-lp-encoding bits correctly Aneesh Kumar K.V
2013-04-22 10:00 ` [PATCH -V6 12/27] powerpc: Fix hpte_decode to use the correct decoding for page sizes Aneesh Kumar K.V
2013-04-22 10:00 ` [PATCH -V6 13/27] powerpc: print both base and actual page size on hash failure Aneesh Kumar K.V
2013-04-22 10:00 ` [PATCH -V6 14/27] powerpc: Print page size info during boot Aneesh Kumar K.V
2013-04-22 10:00 ` [PATCH -V6 15/27] powerpc: Update tlbie/tlbiel as per ISA doc Aneesh Kumar K.V
2013-04-22 10:00 ` [PATCH -V6 16/27] mm/THP: HPAGE_SHIFT is not a #define on some arch Aneesh Kumar K.V
2013-04-22 15:43 ` Andrea Arcangeli
2013-04-22 10:00 ` [PATCH -V6 17/27] mm/THP: Add pmd args to pgtable deposit and withdraw APIs Aneesh Kumar K.V
2013-04-22 15:46 ` Andrea Arcangeli
2013-04-22 10:00 ` [PATCH -V6 18/27] mm/THP: withdraw the pgtable after pmdp related operations Aneesh Kumar K.V
2013-04-22 15:49 ` Andrea Arcangeli
2013-04-24 9:08 ` Aneesh Kumar K.V
2013-04-24 15:14 ` Andrea Arcangeli
2013-04-25 6:11 ` Aneesh Kumar K.V
2013-04-22 10:00 ` [PATCH -V6 19/27] powerpc/THP: Double the PMD table size for THP Aneesh Kumar K.V
2013-04-22 10:00 ` [PATCH -V6 20/27] powerpc/THP: Implement transparent hugepages for ppc64 Aneesh Kumar K.V
2013-04-22 10:00 ` [PATCH -V6 21/27] powerpc: move find_linux_pte_or_hugepte and gup_hugepte to common code Aneesh Kumar K.V
2013-04-22 10:00 ` [PATCH -V6 22/27] powerpc: Update find_linux_pte_or_hugepte to handle transparent hugepages Aneesh Kumar K.V
2013-04-22 10:00 ` [PATCH -V6 23/27] powerpc: Replace find_linux_pte with find_linux_pte_or_hugepte Aneesh Kumar K.V
2013-04-24 6:29 ` Paul Mackerras
2013-04-22 10:00 ` [PATCH -V6 24/27] powerpc: Update gup_pmd_range to handle transparent hugepages Aneesh Kumar K.V
2013-04-22 10:00 ` [PATCH -V6 25/27] powerpc/THP: Add code to handle HPTE faults for large pages Aneesh Kumar K.V
2013-04-22 10:01 ` [PATCH -V6 26/27] powerpc/THP: Enable THP on PPC64 Aneesh Kumar K.V
2013-04-22 10:01 ` [PATCH -V6 27/27] powerpc: Optimize hugepage invalidate Aneesh Kumar K.V
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