[PATCH] arm64: Add AMPERE1 to the Spectre-BHB affected list

James Morse james.morse at arm.com
Wed Oct 12 09:28:34 PDT 2022


Hi Scott,

On 11/10/2022 03:21, D Scott Phillips wrote:
> Per AmpereOne erratum AC03_CPU_12, "Branch history may allow control of
> speculative execution across software contexts," the AMPERE1 core needs the
> bhb clearing loop to mitigate Spectre-BHB, with a loop iteration count of
> 11.

Reviewed-by: James Morse <james.morse at arm.com>

I tried googling for 'AC03_CPU_12', but didn't find anything. Is there a public document
for things like this?


Thanks,

James



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