diff options
| author | Paul Mundt <lethal@linux-sh.org> | 2008-11-12 12:53:48 +0900 |
|---|---|---|
| committer | Paul Mundt <lethal@linux-sh.org> | 2008-11-12 12:53:48 +0900 |
| commit | 185aed75570fb4f78ef283dfa26cd9da5fa06a91 (patch) | |
| tree | a98cb3f46bf9426f8d4a660d63b8a3ac7d9f369d /arch/sh/mm/Makefile_32 | |
| parent | ade7a9b4ccd20ab8159c77a0abd20552f2d6b06c (diff) | |
sh: Provide a sane valid_phys_addr_range() to prevent TLB reset with PMB.
With the PMB enabled, only P1SEG and up are covered by the PMB mappings,
meaning that situations where out-of-bounds physical addresses are read
from will lead to TLB reset after the PMB miss, allowing for use cases
like dd if=/dev/mem to reset the TLB.
Fix this up to make sure the reference is between __MEMORY_START (phys)
and __pa(high_memory). This is coherent across all variants of sh/sh64
with and without MMU, though the PMB bug itself is only applicable to
SH-4A parts.
Reported-by: Hideo Saito <saito@densan.co.jp>
Signed-off-by: Paul Mundt <lethal@linux-sh.org>
Diffstat (limited to 'arch/sh/mm/Makefile_32')
| -rw-r--r-- | arch/sh/mm/Makefile_32 | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/arch/sh/mm/Makefile_32 b/arch/sh/mm/Makefile_32 index 70e0906023c..f066e76da20 100644 --- a/arch/sh/mm/Makefile_32 +++ b/arch/sh/mm/Makefile_32 @@ -2,7 +2,7 @@ # Makefile for the Linux SuperH-specific parts of the memory manager. # -obj-y := init.o extable_32.o consistent.o +obj-y := init.o extable_32.o consistent.o mmap.o ifndef CONFIG_CACHE_OFF cache-$(CONFIG_CPU_SH2) := cache-sh2.o |