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

[Andrei Gherzan]

On 23/06/07 05:33PM, Thadeu Lima de Souza Cascardo 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

Acked-by: Andrei Gherzan <andrei.gherzan at canonical.com>

-- 
Andrei Gherzan
-------------- next part --------------
A non-text attachment was scrubbed...
Name: signature.asc
Type: application/pgp-signature
Size: 833 bytes
Desc: not available
URL: <https://lists.ubuntu.com/archives/kernel-team/attachments/20230609/0905a499/attachment.sig>