Commit 5813f5de authored Nov 30, 2012 by Arve Hjønnevåg Committed by John Stultz Feb 16, 2016

ARM: decompressor: Flush tlb before swiching domain 0 to client mode



If the bootloader used a page table that is incompatible with domain 0
in client mode, and boots with the mmu on, then swithing domain 0 to
client mode causes a fault if we don't flush the tlb after updating
the page table pointer.

v2: Add ISB before loading dacr.

Signed-off-by: Arve Hjønnevåg <arve@android.com>

parent 69a800c9

arch/arm/boot/compressed/head.S

+2 −0

Original line number	Diff line number	Diff line
		@@ -778,6 +778,8 @@ __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
		mcr p15, 0, r0, c7, c5, 4 @ ISB
		mcrne p15, 0, r1, c3, c0, 0 @ load domain access control
		mcrne p15, 0, r6, c2, c0, 2 @ load ttb control
		#endif