linux-kernel - Re: [PATCH] iommu/amd: page-specific invalidations for more than one page

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Message-ID: <YG6uWFAS6GCWJPGO@8bytes.org>
Date:   Thu, 8 Apr 2021 09:18:48 +0200
From:   Joerg Roedel <joro@...tes.org>
To:     Nadav Amit <namit@...are.com>
Cc:     Will Deacon <will@...nel.org>, Jiajun Cao <caojiajun@...are.com>,
        "iommu@...ts.linux-foundation.org" <iommu@...ts.linux-foundation.org>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH] iommu/amd: page-specific invalidations for more than one
 page

Hi Nadav,

On Wed, Apr 07, 2021 at 05:57:31PM +0000, Nadav Amit wrote:
> I tested it on real bare-metal hardware. I ran some basic I/O workloads
> with the IOMMU enabled, checkers enabled/disabled, and so on.
> 
> However, I only tested the IOMMU-flushes and I did not test that the
> device-IOTLB flush work, since I did not have the hardware for that.
> 
> If you can refer me to the old patches, I will have a look and see
> whether I can see a difference in the logic or test them. If you want
> me to run different tests - let me know. If you want me to remove
> the device-IOTLB invalidations logic - that is also fine with me.

Here is the patch-set, it is from 2010 and against a very old version of
the AMD IOMMU driver:

	https://lore.kernel.org/lkml/1265898797-32183-1-git-send-email-joerg.roedel@amd.com/

Regards,

	Joerg