linux-kernel - Re: [stable:PATCH v4.14.274 00/27] arm64: Mitigate spectre style branch history side channels

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Date:   Thu, 31 Mar 2022 21:03:52 +0200
From:   Greg KH <greg@...ah.com>
To:     James Morse <james.morse@....com>
Cc:     stable@...r.kernel.org, linux-kernel@...r.kernel.org,
        catalin.marinas@....com
Subject: Re: [stable:PATCH v4.14.274 00/27] arm64: Mitigate spectre style
 branch history side channels

On Thu, Mar 31, 2022 at 07:33:33PM +0100, James Morse wrote:
> Hello!
> 
> This is the spectre-bhb backport for v4.14.
> This comes with an A76 timer workaround. v4.14 doesn't have a compat
> vdso, so doesn't need all the patches for that workaround.
> In particular, it doesn't need Marc's series:
> https://lore.kernel.org/linux-arm-kernel/20200715125614.3240269-1-maz@kernel.org/
> 
> I included the Kconfig change that restricts this to COMPAT, but not commit
> 0f80cad3124f ("arm64: Restrict ARM64_ERRATUM_1188873 mitigation to AArch32"),
> which is an invasive performance optimisation that wasn't marked as
> being for stable.

Thanks for these, all now queued up!

greg k-h