From: Jian-Hong Pan <jhp@endlessos.org>
To: Lorenzo Pieralisi <lorenzo.pieralisi@arm.com>,
Jon Derrick <jonathan.derrick@intel.com>
Cc: Jian-Hong Pan <jhp@endlessos.org>,
linux-pci@vger.kernel.org, Keith Busch <kbusch@kernel.org>,
Bjorn Helgaas <helgaas@kernel.org>,
You-Sheng Yang <vicamo.yang@canonical.com>,
linux@endlessm.com
Subject: Re: [PATCH v3] PCI: vmd: Offset Client VMD MSI-X vectors
Date: Thu, 22 Oct 2020 14:24:53 +0800 [thread overview]
Message-ID: <20201022062451.86145-1-jhp@endlessos.org> (raw)
In-Reply-To: <20200914190128.5114-1-jonathan.derrick@intel.com>
> Client VMD platforms have a software-triggered MSI-X vector 0 that will
> not forward hardware-remapped MSI from the sub-device domain. This
> causes an issue with VMD platforms that use AHCI behind VMD and have a
> single MSI-X vector remapped to VMD vector 0. Add a VMD MSI-X vector
> offset for these platforms.
>
> Signed-off-by: Jon Derrick <jonathan.derrick@intel.com>
Tested this patch based on latest mainline kernel at commit f804b3159482 ("Merge
tag 'linux-watchdog-5.10-rc1' of git://www.linux-watchdog.org/linux-watchdog").
We have some laptops equipped with Tiger Lake chips and such configuration that
hit the same issue. They all could be fixed by this patch.
Thank you
Tested-by: Jian-Hong Pan <jhp@endlessos.org>
prev parent reply other threads:[~2020-10-22 6:29 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-09-14 19:01 [PATCH v3] PCI: vmd: Offset Client VMD MSI-X vectors Jon Derrick
2020-10-05 11:23 ` Lorenzo Pieralisi
2020-10-05 14:39 ` Derrick, Jonathan
2020-10-22 6:24 ` Jian-Hong Pan [this message]
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