linux-kernel - [PATCH 5/7] arm64: Default kernel pages should be contiguous

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Date:	Wed, 16 Sep 2015 14:03:04 -0500
From:	Jeremy Linton <jeremy.linton@....com>
To:	linux-arm-kernel@...ts.infradead.org
Cc:	catalin.marinas@....com, will.deacon@....com,
	linux-kernel@...r.kernel.org, dwoods@...ip.com,
	steve.capper@....com, shijie.huang@....com,
	Jeremy Linton <jeremy.linton@....com>
Subject: [PATCH 5/7] arm64: Default kernel pages should be contiguous

The default page attributes for a PMD being broken should have the CONT bit
set. Create a new definition for an early boot range of PTE's that are
contiguous.

Signed-off-by: Jeremy Linton <jeremy.linton@....com>
---
 arch/arm64/include/asm/pgtable.h | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/arch/arm64/include/asm/pgtable.h b/arch/arm64/include/asm/pgtable.h
index d43e1d1..252499e 100644
--- a/arch/arm64/include/asm/pgtable.h
+++ b/arch/arm64/include/asm/pgtable.h
@@ -76,6 +76,8 @@ extern void __pgd_error(const char *file, int line, unsigned long val);
 
 #define PAGE_KERNEL		__pgprot(_PAGE_DEFAULT | PTE_PXN | PTE_UXN | PTE_DIRTY | PTE_WRITE)
 #define PAGE_KERNEL_EXEC	__pgprot(_PAGE_DEFAULT | PTE_UXN | PTE_DIRTY | PTE_WRITE)
+#define PAGE_KERNEL_EXEC_CONT	__pgprot(_PAGE_DEFAULT | PTE_UXN | PTE_DIRTY | \
+					 PTE_WRITE | PTE_CONT)
 
 #define PAGE_HYP		__pgprot(_PAGE_DEFAULT | PTE_HYP)
 #define PAGE_HYP_DEVICE		__pgprot(PROT_DEVICE_nGnRE | PTE_HYP)
-- 
2.4.3


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