linux-kernel - Re: [PATCH v2 5/8] iommu/arm-smmu-v3: Skip cd sync if CD table isn't active

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Date:   Tue, 1 Aug 2023 11:13:44 -0300
From:   Jason Gunthorpe <jgg@...dia.com>
To:     Michael Shavit <mshavit@...gle.com>
Cc:     iommu@...ts.linux.dev, linux-arm-kernel@...ts.infradead.org,
        linux-kernel@...r.kernel.org, will@...nel.org,
        robin.murphy@....com, nicolinc@...dia.com, jean-philippe@...aro.org
Subject: Re: [PATCH v2 5/8] iommu/arm-smmu-v3: Skip cd sync if CD table isn't
 active

On Mon, Jul 31, 2023 at 06:48:15PM +0800, Michael Shavit wrote:
> This commit explicitly keeps track of whether a CD table is installed in
> an STE so that arm_smmu_sync_cd can skip the sync when unnecessary. This
> was previously achieved through the domain->devices list, but we are
> moving to a model where arm_smmu_sync_cd directly operates on a master
> and the master's CD table instead of a domain.
> 
> Signed-off-by: Michael Shavit <mshavit@...gle.com>
> ---
> 
> Changes in v2:
> - Store field as a bit instead of a bool. Fix comment about STE being
>   live before the sync in write_ctx_desc().

Reviewed-by: Jason Gunthorpe <jgg@...dia.com>

Jason