On 09/18/2020 05:47 PM, Will Deacon wrote:
From: Marc Zyngier <maz@xxxxxxxxxx>
Commit 606f8e7b27bf ("arm64: capabilities: Use linear array for
detection and verification") changed the way we deal with per-CPU errata
by only calling the .matches() callback until one CPU is found to be
affected. At this point, .matches() stop being called, and .cpu_enable()
will be called on all CPUs.
This breaks the ARCH_WORKAROUND_2 handling, as only a single CPU will be
mitigated.
In order to address this, forcefully call the .matches() callback from a
.cpu_enable() callback, which brings us back to the original behaviour.
Fixes: 606f8e7b27bf ("arm64: capabilities: Use linear array for detection and verification")
Cc: <stable@xxxxxxxxxxxxxxx>
Signed-off-by: Marc Zyngier <maz@xxxxxxxxxx>
Signed-off-by: Will Deacon <will@xxxxxxxxxx>
Reviewed-by: Suzuki K Poulose <suzuki.poulose@xxxxxxx>
