KVM: arm64: vgic-v3: Restrict SEIS workaround to known broken systems

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Contrary to what df652bcf11 ("KVM: arm64: vgic-v3: Work around GICv3
locally generated SErrors") was asserting, there is at least one other
system out there (Cavium ThunderX2) implementing SEIS, and not in
an obviously broken way.

So instead of imposing the M1 workaround on an innocent bystander,
let's limit it to the two known broken Apple implementations.

Fixes: df652bcf11 ("KVM: arm64: vgic-v3: Work around GICv3 locally generated SErrors")
Reported-by: Ard Biesheuvel <ardb@kernel.org>
Tested-by: Ard Biesheuvel <ardb@kernel.org>
Acked-by: Ard Biesheuvel <ardb@kernel.org>
Signed-off-by: Marc Zyngier <maz@kernel.org>
Cc: stable@vger.kernel.org
Link: https://lore.kernel.org/r/20220122103912.795026-1-maz@kernel.org

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This commit is contained in:

Marc Zyngier 2022-01-21 21:07:47 +00:00

parent 094d00f8ca

commit d11a327ed9

2 changed files with 18 additions and 2 deletions

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3

arch/arm64/kvm/hyp/vgic-v3-sr.c

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17

arch/arm64/kvm/vgic/vgic-v3.c

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