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| author | Arve Hjønnevåg <arve@android.com> | 2012-11-30 17:05:40 -0800 |
|---|---|---|
| committer | Joonas Kylmälä <joonas.kylmala@iki.fi> | 2019-02-17 12:44:16 -0500 |
| commit | b6fcfd8cfdc54fe9673caf0fc3be7100239dcfc4 (patch) | |
| tree | 2dd7c40762dc9d85a478bb754766171348db9c4b | |
| parent | a2c056775021e3dbb8fa309d51bd68b74166096b (diff) | |
| download | kernel_replicant_linux-b6fcfd8cfdc54fe9673caf0fc3be7100239dcfc4.tar.gz kernel_replicant_linux-b6fcfd8cfdc54fe9673caf0fc3be7100239dcfc4.tar.bz2 kernel_replicant_linux-b6fcfd8cfdc54fe9673caf0fc3be7100239dcfc4.zip | |
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 <arve@android.com>
| -rw-r--r-- | arch/arm/boot/compressed/head.S | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/arch/arm/boot/compressed/head.S b/arch/arm/boot/compressed/head.S index 6c7ccb428c07..d68f6ab2eff5 100644 --- a/arch/arm/boot/compressed/head.S +++ b/arch/arm/boot/compressed/head.S @@ -837,6 +837,8 @@ __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 |