On 09/18/2020 05:47 PM, Will Deacon wrote:
From: Marc Zyngier maz@kernel.org
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@vger.kernel.org Signed-off-by: Marc Zyngier maz@kernel.org Signed-off-by: Will Deacon will@kernel.org
Reviewed-by: Suzuki K Poulose suzuki.poulose@arm.com