ARM: 8670/1: V7M: Do not corrupt vector table around v7m_invalidate_l1 call
authorVladimir Murzin <vladimir.murzin@arm.com>
Mon, 24 Apr 2017 09:40:48 +0000 (10:40 +0100)
committerRussell King <rmk+kernel@armlinux.org.uk>
Wed, 26 Apr 2017 09:57:53 +0000 (10:57 +0100)
commit6d80594936914e798b1b54b3bfe4bd68d8418966
tree870eb3154904c3f0b590b72f139756c21c87c322
parent3872fe83a2fbb7366daa93ca533a22138e2d483e
ARM: 8670/1: V7M: Do not corrupt vector table around v7m_invalidate_l1 call

We save/restore registers around v7m_invalidate_l1 to address pointed
by r12, which is vector table, so the first eight entries are
overwritten with a garbage. We already have stack setup at that stage,
so use it to save/restore register.

Fixes: 6a8146f420be ("ARM: 8609/1: V7M: Add support for the Cortex-M7 processor")
Cc: <stable@vger.kernel.org>
Signed-off-by: Vladimir Murzin <vladimir.murzin@arm.com>
Signed-off-by: Russell King <rmk+kernel@armlinux.org.uk>
arch/arm/mm/proc-v7m.S