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From: Logan Gunthorpe <logang@deltatee.com>
To: "Popov, Pavel E" <pavel.e.popov@intel.com>,
	Bjorn Helgaas <bhelgaas@google.com>,
	Leon Romanovsky <leon@kernel.org>
Cc: 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: Mon, 19 Oct 2026 15:14:38 -0600	[thread overview]
Message-ID: <fca6d815-519a-449d-a5b7-36bd3ad0c19f@deltatee.com> (raw)
In-Reply-To: <LV2PR11MB607077BABF5643BD4FAF470FB2982@LV2PR11MB6070.namprd11.prod.outlook.com>



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.

Thanks,

Logan

  reply	other threads:[~2026-10-19 21:14 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 [this message]
2026-10-20  5:22               ` Leon Romanovsky
2026-10-16 22:34 ` [PATCH v2 2/2] PCI/P2PDMA: Allow P2PDMA in Hyper-V " Pavel Popov

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