linux-kernel - Re: [PATCH] iommu/amd: Fix event counter availability check

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Message-ID: <alpine.LNX.2.20.13.2009172052480.29869@monopod.intra.ispras.ru>
Date:   Thu, 17 Sep 2020 20:55:32 +0300 (MSK)
From:   Alexander Monakov <amonakov@...ras.ru>
To:     Suravee Suthikulpanit <suravee.suthikulpanit@....com>
cc:     linux-kernel@...r.kernel.org, Joerg Roedel <joro@...tes.org>,
        iommu@...ts.linux-foundation.org
Subject: Re: [PATCH] iommu/amd: Fix event counter availability check

On Tue, 16 Jun 2020, Suravee Suthikulpanit wrote:

> > > Instead of blindly moving the code around to a spot that would just work,
> > > I am trying to understand what might be required here. In this case,
> > > the init_device_table_dma()should not be needed. I suspect it's the IOMMU
> > > invalidate all command that's also needed here.
> > > 
> > > I'm also checking with the HW and BIOS team. Meanwhile, could you please
> > > give
> > > the following change a try:
> > Hello. Can you give any update please?
> > 
> > Alexander
> > 
> 
> Sorry for late reply. I have a reproducer and working with the HW team to
> understand the issue.
> I should be able to provide update with solution by the end of this week.

Hello, hope you are doing well. Has this investigation found anything?

Thanks.
Alexander