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Received: from guinness.priv.deltatee.com ([172.16.1.162]) by ale.deltatee.com with esmtpsa (TLS1.3) tls TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256 (Exim 4.98.2) (envelope-from ) id 1xIugz-00000000HUZ-2bSt; Mon, 19 Oct 2026 15:14:50 -0600 Message-ID: Date: Mon, 19 Oct 2026 15:14:38 -0600 X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Post: List-Help: List-Subscribe: List-Unsubscribe: List-Owner: Precedence: list MIME-Version: 1.0 User-Agent: Mozilla Thunderbird To: "Popov, Pavel E" , Bjorn Helgaas , Leon Romanovsky Cc: Jim Chow , Radu Rugina , Alexey Makhalov , Wei Liu , Michael Kelley , Lukas Wunner , Nathan Ciobanu , "bcm-kernel-feedback-list@broadcom.com" , "virtualization@lists.linux.dev" , "linux-hyperv@vger.kernel.org" , "linux-pci@vger.kernel.org" , "linux-kernel@vger.kernel.org" References: <20261016223402.19991-1-pavel.e.popov@intel.com> <20261016223402.19991-2-pavel.e.popov@intel.com> <8b01d643-f62d-4118-a700-8874341d953b@deltatee.com> <20261017074820.GD219304@unreal> Content-Language: en-CA From: Logan Gunthorpe In-Reply-To: Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 7bit X-SA-Exim-Connect-IP: 172.16.1.162 X-SA-Exim-Rcpt-To: pavel.e.popov@intel.com, bhelgaas@google.com, leon@kernel.org, jim.chow@broadcom.com, radu.rugina@broadcom.com, alexey.makhalov@broadcom.com, wei.liu@kernel.org, mhklinux@outlook.com, lukas@wunner.de, nathan.d.ciobanu@linux.intel.com, bcm-kernel-feedback-list@broadcom.com, virtualization@lists.linux.dev, linux-hyperv@vger.kernel.org, linux-pci@vger.kernel.org, linux-kernel@vger.kernel.org X-SA-Exim-Mail-From: logang@deltatee.com X-Spam-Level: Subject: Re: [PATCH v2 1/2] PCI/P2PDMA: Allow P2PDMA in VMware guests on Intel hosts X-SA-Exim-Version: 4.2.1 (built Sun, 23 Feb 2025 07:57:16 +0000) X-SA-Exim-Scanned: Yes (on ale.deltatee.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