linux-kernel - Re: [patch V2 00/19] PCI/MSI, x86: Cure a couple of inconsistencies

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Date:   Tue, 10 Aug 2021 08:49:37 +0100
From:   Marc Zyngier <maz@...nel.org>
To:     Thomas Gleixner <tglx@...utronix.de>
Cc:     LKML <linux-kernel@...r.kernel.org>,
        Alex Williamson <alex.williamson@...hat.com>,
        "Raj, Ashok" <ashok.raj@...el.com>,
        "David S. Miller" <davem@...emloft.net>,
        Bjorn Helgaas <bhelgaas@...gle.com>, linux-pci@...r.kernel.org,
        Kevin Tian <kevin.tian@...el.com>,
        Ingo Molnar <mingo@...nel.org>, x86@...nel.org,
        linux-s390@...r.kernel.org,
        Niklas Schnelle <schnelle@...ux.ibm.com>,
        Gerald Schaefer <gerald.schaefer@...ux.ibm.com>,
        Heiko Carstens <hca@...ux.ibm.com>,
        Christian Borntraeger <borntraeger@...ibm.com>
Subject: Re: [patch V2 00/19] PCI/MSI, x86: Cure a couple of inconsistencies

On 2021-07-29 22:51, Thomas Gleixner wrote:
> A recent discussion about the PCI/MSI management for virtio unearthed a
> violation of the MSI-X specification vs. writing the MSI-X message: 
> under
> certain circumstances the entry is written without being masked.
> 
> While looking at that and the related violation of the x86 non-remapped
> interrupt affinity mechanism a few other issues were discovered by
> inspection.
> 
> The following series addresses these.
> 
> Note this does not fix the virtio issue, but while staring at the above
> problems I came up with a plan to address this. I'm still trying to
> convince myself that I can get away without sprinkling locking all over 
> the
> place, so don't hold your breath that this will materialize tomorrow.

For the patches I haven't acked yet, and with the fix on patch 18:

Reviewed-by: Marc Zyngier <maz@...nel.org>
Tested-by: Marc Zyngier <maz@...nel.org>

Thanks,

         M.