From: Leon Romanovsky <leon@kernel.org>
To: Logan Gunthorpe <logang@deltatee.com>
Cc: "Popov, Pavel E" <pavel.e.popov@intel.com>,
Bjorn Helgaas <bhelgaas@google.com>,
Jim Chow <jim.chow@broadcom.com>,
Radu Rugina <radu.rugina@broadcom.com>,
Alexey Makhalov <alexey.makhalov@broadcom.com>,
Wei Liu <wei.liu@kernel.org>,
Michael Kelley <mhklinux@outlook.com>,
Lukas Wunner <lukas@wunner.de>,
Nathan Ciobanu <nathan.d.ciobanu@linux.intel.com>,
"bcm-kernel-feedback-list@broadcom.com"
<bcm-kernel-feedback-list@broadcom.com>,
"virtualization@lists.linux.dev" <virtualization@lists.linux.dev>,
"linux-hyperv@vger.kernel.org" <linux-hyperv@vger.kernel.org>,
"linux-pci@vger.kernel.org" <linux-pci@vger.kernel.org>,
"linux-kernel@vger.kernel.org" <linux-kernel@vger.kernel.org>
Subject: Re: [PATCH v2 1/2] PCI/P2PDMA: Allow P2PDMA in VMware guests on Intel hosts
Date: Tue, 20 Oct 2026 08:22:11 +0300 [thread overview]
Message-ID: <20261020052211.GJ64621@unreal> (raw)
In-Reply-To: <fca6d815-519a-449d-a5b7-36bd3ad0c19f@deltatee.com>
On Mon, Oct 19, 2026 at 03:14:38PM -0600, Logan Gunthorpe wrote:
>
>
> On 2026-10-19 13:48, Popov, Pavel E wrote:
> > Logan, Leon,
> >
> > I kept the hypervisor check to avoid changing what the host bridge
> > whitelist refuses on bare metal. Looking at those cases again, on the
> > listed Xeon CPUs this is a limitation of the whitelist itself, not a
> > known hardware limit, and it is why Intel QAT/DSA/IAA had to be added
> > by ID. So I'd drop the hypervisor check.
> >
> > Would a v3 that moves the Xeon list into cpu_supports_p2pdma(), the
> > same way as the AMD check, be acceptable to you both?
>
> Yes, that's essentially what I was suggesting before. That would be
> acceptable to me.
Right, I also wrote the same thing in my summary "We agreed ...".
Thanks
>
> Thanks,
>
> Logan
>
next prev parent reply other threads:[~2026-10-20 5:22 UTC|newest]
Thread overview: 10+ messages / expand[flat|nested] mbox.gz Atom feed top
2026-10-16 22:34 [PATCH v2 0/2] PCI/P2PDMA: Allow P2PDMA in VMware and Hyper-V " Pavel Popov
2026-10-16 22:34 ` [PATCH v2 1/2] PCI/P2PDMA: Allow P2PDMA in VMware " Pavel Popov
2026-10-16 22:55 ` Logan Gunthorpe
2026-10-17 0:31 ` Popov, Pavel E
2026-10-17 7:48 ` Leon Romanovsky
2026-10-17 15:21 ` Popov, Pavel E
2026-10-19 19:48 ` Popov, Pavel E
2026-10-19 21:14 ` Logan Gunthorpe
2026-10-20 5:22 ` Leon Romanovsky [this message]
2026-10-16 22:34 ` [PATCH v2 2/2] PCI/P2PDMA: Allow P2PDMA in Hyper-V " Pavel Popov
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