[PATCH] ARM: decompressor: Flush tlb before swiching domain 0 to client mode
From: Arve HjÃnnevÃg
Date: Tue Dec 11 2012 - 21:07:56 EST
If the bootloader used a page table that is incompatible with domain 0
in client mode, then swithing domain 0 to client mode causes a fault
if we don't flush the tlb after updating the page table pointer.
Signed-off-by: Arve HjÃnnevÃg <arve@xxxxxxxxxxx>
---
arch/arm/boot/compressed/head.S | 1 +
1 files changed, 1 insertions(+), 0 deletions(-)
diff --git a/arch/arm/boot/compressed/head.S b/arch/arm/boot/compressed/head.S
index 90275f0..9c8034c 100644
--- a/arch/arm/boot/compressed/head.S
+++ b/arch/arm/boot/compressed/head.S
@@ -704,6 +704,7 @@ __armv7_mmu_cache_on:
bic r6, r6, #1 << 31 @ 32-bit translation system
bic r6, r6, #3 << 0 @ use only ttbr0
mcrne p15, 0, r3, c2, c0, 0 @ load page table pointer
+ mcrne p15, 0, r0, c8, c7, 0 @ flush I,D TLBs
mcrne p15, 0, r1, c3, c0, 0 @ load domain access control
mcrne p15, 0, r6, c2, c0, 2 @ load ttb control
#endif
--
1.7.7.3
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