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| author | Kevin Hao <haokexin@gmail.com> | 2013-12-24 11:12:03 +0400 |
|---|---|---|
| committer | Scott Wood <scottwood@freescale.com> | 2014-01-10 03:52:14 +0400 |
| commit | 7c732cba3d9312882e82d91d5948261dfd5c8fe6 (patch) | |
| tree | a55df3b832bd8fcf505c8ef2fd2340d840e86be4 /arch/powerpc/mm/hugetlbpage-book3e.c | |
| parent | d2dc13b5339c657e526c405888df69d99322a016 (diff) | |
| download | linux-7c732cba3d9312882e82d91d5948261dfd5c8fe6.tar.xz | |
powerpc/fsl_booke: protect the access to MAS7
The e500v1 doesn't implement the MAS7, so we should avoid to access
this register on that implementations. In the current kernel, the
access to MAS7 are protected by either CONFIG_PHYS_64BIT or
MMU_FTR_BIG_PHYS. Since some code are executed before the code
patching, we have to use CONFIG_PHYS_64BIT in these cases.
Signed-off-by: Kevin Hao <haokexin@gmail.com>
Signed-off-by: Scott Wood <scottwood@freescale.com>
Diffstat (limited to 'arch/powerpc/mm/hugetlbpage-book3e.c')
| -rw-r--r-- | arch/powerpc/mm/hugetlbpage-book3e.c | 3 |
1 files changed, 2 insertions, 1 deletions
diff --git a/arch/powerpc/mm/hugetlbpage-book3e.c b/arch/powerpc/mm/hugetlbpage-book3e.c index 74551b5e41e5..646c4bffaeba 100644 --- a/arch/powerpc/mm/hugetlbpage-book3e.c +++ b/arch/powerpc/mm/hugetlbpage-book3e.c @@ -103,7 +103,8 @@ void book3e_hugetlb_preload(struct vm_area_struct *vma, unsigned long ea, if (mmu_has_feature(MMU_FTR_USE_PAIRED_MAS)) { mtspr(SPRN_MAS7_MAS3, mas7_3); } else { - mtspr(SPRN_MAS7, upper_32_bits(mas7_3)); + if (mmu_has_feature(MMU_FTR_BIG_PHYS)) + mtspr(SPRN_MAS7, upper_32_bits(mas7_3)); mtspr(SPRN_MAS3, lower_32_bits(mas7_3)); } |