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From: Andi Kleen <ak@suse.de>
To: tglx@linutronix.de, mingo@elte.hu, linux-kernel@vger.kernel.org
Subject: [PATCH] [8/12] GBPAGES: Implement gbpages support in change_page_attr()
Date: Fri, 1 Feb 2008 10:53:21 +0100 (CET) [thread overview]
Message-ID: <20080201095321.506401B416F@basil.firstfloor.org> (raw)
In-Reply-To: <200802011053.107168490@suse.de>
Signed-off-by: Andi Kleen <ak@suse.de>
---
arch/x86/mm/pageattr.c | 13 ++++++++++++-
1 file changed, 12 insertions(+), 1 deletion(-)
Index: linux/arch/x86/mm/pageattr.c
===================================================================
--- linux.orig/arch/x86/mm/pageattr.c
+++ linux/arch/x86/mm/pageattr.c
@@ -203,6 +203,7 @@ static int split_large_page(pte_t *kpte,
pte_t *pbase, *tmp;
struct page *base;
unsigned int i, level;
+ unsigned long ps;
#ifdef CONFIG_DEBUG_PAGEALLOC
gfp_flags = __GFP_HIGH | __GFP_NOFAIL | __GFP_NOWARN;
@@ -225,13 +226,23 @@ static int split_large_page(pte_t *kpte,
address = __pa(address);
addr = address & PMD_PAGE_MASK;
+
+ ps = PAGE_SIZE;
+#ifdef CONFIG_X86_64
+ if (level == PG_LEVEL_1G) {
+ ps = PMD_PAGE_SIZE;
+ pgprot_val(ref_prot) |= _PAGE_PSE;
+ addr &= PUD_PAGE_MASK;
+ }
+#endif
+
pbase = (pte_t *)page_address(base);
#ifdef CONFIG_X86_32
paravirt_alloc_pt(&init_mm, page_to_pfn(base));
#endif
pgprot_val(ref_prot) &= ~_PAGE_NX;
- for (i = 0; i < PTRS_PER_PTE; i++, addr += PAGE_SIZE)
+ for (i = 0; i < PTRS_PER_PTE; i++, addr += ps)
set_pte(&pbase[i], pfn_pte(addr >> PAGE_SHIFT, ref_prot));
/*
next prev parent reply other threads:[~2008-02-01 9:56 UTC|newest]
Thread overview: 18+ messages / expand[flat|nested] mbox.gz Atom feed top
2008-02-01 9:53 [PATCH] [0/12] GBPAGES patchkit for 2.6.25 v3 Andi Kleen
2008-02-01 9:53 ` [PATCH] [1/12] GBPAGES: Add feature macros for the gbpages cpuid bit Andi Kleen
2008-02-01 9:53 ` [PATCH] [2/12] GBPAGES: Rename LARGE_PAGE_SIZE to PMD_PAGE_SIZE Andi Kleen
2008-02-01 9:53 ` [PATCH] [3/12] GBPAGES: Add PUD_PAGE_SIZE Andi Kleen
2008-02-01 9:53 ` [PATCH] [4/12] Add pgtable accessor functions for GB pages Andi Kleen
2008-02-01 9:53 ` [PATCH] [5/12] GBPAGES: Support gbpages in pagetable dump Andi Kleen
2008-02-01 9:53 ` [PATCH] [6/12] GBPAGES: Add gbpages support to lookup_address Andi Kleen
2008-02-01 9:53 ` [PATCH] [7/12] GBPAGES: Add an option to disable direct mapping gbpages and a global variable Andi Kleen
2008-02-05 22:41 ` Randy Dunlap
2008-02-01 9:53 ` Andi Kleen [this message]
2008-02-01 9:53 ` [PATCH] [9/12] GBPAGES: Switch pci-gart over to using cpa instead of clear_kernel_mapping Andi Kleen
2008-02-01 9:53 ` [PATCH] [10/12] GBPAGES: Remove now unused clear_kernel_mapping Andi Kleen
2008-02-01 9:53 ` [PATCH] [11/12] GBPAGES: Do kernel direct mapping at boot using GB pages Andi Kleen
2008-02-01 9:53 ` [PATCH] [12/12] GBPAGES: Switch direct mapping setup over to set_pte Andi Kleen
2008-02-01 17:37 ` Jeremy Fitzhardinge
2008-02-01 17:58 ` Andi Kleen
2008-02-01 19:16 ` Jeremy Fitzhardinge
2008-02-01 12:25 ` [PATCH] [0/12] GBPAGES patchkit for 2.6.25 v3 Thomas Gleixner
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