path: root/arch/arm
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authorWill Deacon <will.deacon@arm.com>2013-05-02 13:52:01 +0100
committerGreg Kroah-Hartman <gregkh@linuxfoundation.org>2015-02-05 22:35:38 -0800
commit716669313b88cce317a83230cde7644451aea9f4 (patch)
treece60f3e6dcf32aa6730f15d980a17aab4035d725 /arch/arm
parent98d1567891367f794f10b7cf907055abdb4f897b (diff)
ARM: lpae: fix definition of PTE_HWTABLE_PTRS
commit e38a517578d6c0f764b0d0f6e26dcdf9f70c69d7 upstream. For 2-level page tables, PTE_HWTABLE_PTRS describes the offset between Linux PTEs and hardware PTEs. On LPAE, there is no distinction (since we have 64-bit descriptors with plenty of space) so PTE_HWTABLE_PTRS should be 0. Unfortunately, it is wrongly defined as PTRS_PER_PTE, meaning that current pte table flushing is off by a page. Luckily, all current LPAE implementations are SMP, so the hardware walker can snoop L1. This patch fixes the broken definition. Acked-by: Catalin Marinas <catalin.marinas@arm.com> Signed-off-by: Will Deacon <will.deacon@arm.com> Cc: Hou Pengyang <houpengyang@huawei.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'arch/arm')
1 files changed, 1 insertions, 1 deletions
diff --git a/arch/arm/include/asm/pgtable-3level.h b/arch/arm/include/asm/pgtable-3level.h
index 944551271e37..6d7c532c0c8a 100644
--- a/arch/arm/include/asm/pgtable-3level.h
+++ b/arch/arm/include/asm/pgtable-3level.h
@@ -33,7 +33,7 @@
#define PTRS_PER_PMD 512
#define PTRS_PER_PGD 4
+#define PTE_HWTABLE_PTRS (0)
#define PTE_HWTABLE_OFF (0)
#define PTE_HWTABLE_SIZE (PTRS_PER_PTE * sizeof(u64))