ACK: [SRU Focal, Jammy, OEM-5.17, OEM-6.0, OEM-6.1, Kinetic, Lunar 0/1] LP: #2023220

[Luke Nowakowski-Krijger]

Acked-by: Luke Nowakowski-Krijger <luke.nowakowskikrijger at canonical.com>

On Wed, Jun 7, 2023 at 1:35 PM Thadeu Lima de Souza Cascardo <
cascardo at canonical.com> wrote:

> [Impact]
> When PCIDs are enabled on Alder Lake and Raptor Lake, INVLPG will not flush
> the global TLB entries. This can lead to info leak or undefined behavior.
>
> [Mitigation]
> Boot with nopcid on affected systems.
>
> [Backports]
> Clean cherry-pick, except for 5.4, where backport from linux-5.4.y was
> picked.
>
> [Test case]
> There is no particular test case.
>
> [Potential regressions]
> This affects performance on the affected systems. TLB behavior could also
> be
> affected.
>
> Dave Hansen (1):
>   x86/mm: Avoid incomplete Global INVLPG flushes
>
>  arch/x86/include/asm/intel-family.h |  5 +++++
>  arch/x86/mm/init.c                  | 25 +++++++++++++++++++++++++
>  2 files changed, 30 insertions(+)
>
> --
> 2.34.1
>
>
> --
> kernel-team mailing list
> kernel-team at lists.ubuntu.com
> https://lists.ubuntu.com/mailman/listinfo/kernel-team
>
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