Re: [PATCH 4.14 00/34] Retbleed & PBRSB Mitigations

[Greg KH <greg@kroah.com>]

On Thu, Oct 27, 2022 at 01:48:01PM -0700, Suraj Jitindar Singh wrote:
> This backport adds support for Retbleed and PBRSB mitigations for Intel parts.
> 
> Some AMD parts are added to simplify context however support for IBPB or UNRET
> is not included in this series. The reporting of whether a cpu is affected
> should be correct however.
> 
> Most patches applied cleanly or required only context changes, the major
> difference between this series and upstream is the fact that the kvm entry
> path is in inline asm in the 4.14 tree and so this had to be accommodated
> in patches:
>  - x86/speculation: Fill RSB on vmexit for IBRS
>  - x86/speculation: Add RSB VM Exit protections
> 
> This series is unsurprisingly very similar to that for the 5.4 backport [1].
> 
> Boot tested on a variety of Intel and AMD systems.
> 
> Tested correct reporting of vulnerabilities and mitigation selection on Skylake,
> Cascade Lake, Ice Lake and Zen3 parts.
> 
> [1] https://lore.kernel.org/stable/20221003131038.12645-1-cascardo@canonical.com/

Note, you forgot to sign off on a lot of these patches.  Whenever you
submit a patch, you need to also do that as the patch came through you.

I've queued these up now, and will go do a 4.14.y-rc release with just
these in it to get some testing separate from other changes.

thanks,

greg k-h