ARM: 6299/1: errata: TLBIASIDIS and TLBIMVAIS operations can broadcast a faulty ASID
authorWill Deacon <will.deacon@arm.com>
Thu, 5 Aug 2010 10:20:51 +0000 (11:20 +0100)
committerRussell King <rmk+kernel@arm.linux.org.uk>
Tue, 10 Aug 2010 21:10:54 +0000 (22:10 +0100)
commitcdf357f1e13a08a11261edacb3083746f65c1ed9
treebb49c4536929906b69f6e99e2457fc2ccc7944d9
parent988257cfcbc468cb26b3addfcab1d0187c4e2399
ARM: 6299/1: errata: TLBIASIDIS and TLBIMVAIS operations can broadcast a faulty ASID

On versions of the Cortex-A9 prior to r2p0, performing TLB invalidations by
ASID match can result in the incorrect ASID being broadcast to other CPUs.
As a consequence of this, the targetted TLB entries are not invalidated
across the system.

This workaround changes the TLB flushing routines to invalidate entries
regardless of the ASID.

Cc: <stable@kernel.org>
Tested-by: Rob Clark <rob@ti.com>
Acked-by: Catalin Marinas <catalin.marinas@arm.com>
Signed-off-by: Will Deacon <will.deacon@arm.com>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
arch/arm/Kconfig
arch/arm/include/asm/tlbflush.h