From: Arve Hjønnevåg Date: Sat, 1 Dec 2012 01:05:40 +0000 (-0800) Subject: ANDROID: arm: decompressor: Flush tlb before swiching domain 0 to client mode X-Git-Url: https://git.stricted.de/?a=commitdiff_plain;h=e794cd5b62728861772e9d2d97e9e5f6c375c869;p=GitHub%2FLineageOS%2Fandroid_kernel_motorola_exynos9610.git ANDROID: 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 --- diff --git a/arch/arm/boot/compressed/head.S b/arch/arm/boot/compressed/head.S index 8a756870c238..5b9e2d4bc1b3 100644 --- a/arch/arm/boot/compressed/head.S +++ b/arch/arm/boot/compressed/head.S @@ -794,6 +794,8 @@ __armv7_mmu_cache_on: bic r6, r6, #1 << 31 @ 32-bit translation system bic r6, r6, #(7 << 0) | (1 << 4) @ 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