From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from firstgate.proxmox.com (firstgate.proxmox.com [IPv6:2a01:7e0:0:424::9]) by lore.proxmox.com (Postfix) with ESMTPS id E570F1FF15C for ; Fri, 5 Sep 2025 16:18:57 +0200 (CEST) Received: from firstgate.proxmox.com (localhost [127.0.0.1]) by firstgate.proxmox.com (Proxmox) with ESMTP id 85D9316E7A; Fri, 5 Sep 2025 16:19:12 +0200 (CEST) Mime-Version: 1.0 Date: Fri, 05 Sep 2025 16:18:37 +0200 Message-Id: Cc: "pve-devel" From: "Daniel Kral" To: "Proxmox VE development discussion" X-Mailer: aerc 0.20.0 References: <20250902112307.124706-1-d.kral@proxmox.com> <20250902112307.124706-3-d.kral@proxmox.com> In-Reply-To: <20250902112307.124706-3-d.kral@proxmox.com> X-Bm-Milter-Handled: 55990f41-d878-4baa-be0a-ee34c49e34d2 X-Bm-Transport-Timestamp: 1757081899620 X-SPAM-LEVEL: Spam detection results: 0 AWL 0.016 Adjusted score from AWL reputation of From: address BAYES_00 -1.9 Bayes spam probability is 0 to 1% DMARC_MISSING 0.1 Missing DMARC policy KAM_DMARC_STATUS 0.01 Test Rule for DKIM or SPF Failure with Strict Alignment SPF_HELO_NONE 0.001 SPF: HELO does not publish an SPF Record SPF_PASS -0.001 SPF: sender matches SPF record Subject: Re: [pve-devel] [PATCH qemu-server v2 1/4] fix #6608: expose viommu driver aw-bits option X-BeenThere: pve-devel@lists.proxmox.com X-Mailman-Version: 2.1.29 Precedence: list List-Id: Proxmox VE development discussion List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Reply-To: Proxmox VE development discussion Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Errors-To: pve-devel-bounces@lists.proxmox.com Sender: "pve-devel" On Tue Sep 2, 2025 at 1:21 PM CEST, Daniel Kral wrote: > Since QEMU 9.2 [0], the default I/O address space bit width was raised > from 39 bits to 48 bits for the Intel vIOMMU driver, which makes the > aw-bits check introduced in [1] to trip for host CPUs with less than 48 > bits physical address width from QEMU 9.2 onwards: > > vfio 0000:XX:YY.Z: Failed to set vIOMMU: aw-bits 48 > host aw-bits 39 > > For VFIO devices where a vIOMMU is in-use, QEMU fetches the IOVA ranges > with the iommufd ioctl IOMMU_IOAS_IOVA_RANGES or the vfio_iommu_type1's > VFIO_IOMMU_TYPE1_INFO_CAP_IOVA_RANGE info, so 'phys-bits' doesn't change > the behavior of the check. > > Therefore, expose the 'aw-bits' option of the intel-iommu and > virtio-iommu QEMU drivers to allow users to set the value. > > [0] https://lore.kernel.org/qemu-devel/20241212083757.605022-17-zhenzhong.duan@intel.com/ > [1] https://lore.kernel.org/qemu-devel/20240605083043.317831-18-zhenzhong.duan@intel.com/ > > Signed-off-by: Daniel Kral This patch is superseded by v3 [0]. For the rest of the series, I'll follow up later, just wanted to get this out to users sooner than later ;). [0] https://lore.proxmox.com/pve-devel/20250905141529.215689-1-d.kral@proxmox.com/ _______________________________________________ pve-devel mailing list pve-devel@lists.proxmox.com https://lists.proxmox.com/cgi-bin/mailman/listinfo/pve-devel