From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from eggs.gnu.org ([208.118.235.92]:55697) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1gEWUd-0001Af-7A for qemu-devel@nongnu.org; Mon, 22 Oct 2018 05:27:23 -0400 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1gEWUX-0000UN-8t for qemu-devel@nongnu.org; Mon, 22 Oct 2018 05:27:22 -0400 Received: from mx1.redhat.com ([209.132.183.28]:37958) by eggs.gnu.org with esmtps (TLS1.0:DHE_RSA_AES_256_CBC_SHA1:32) (Exim 4.71) (envelope-from ) id 1gEWUX-0000Tv-3K for qemu-devel@nongnu.org; Mon, 22 Oct 2018 05:27:17 -0400 Date: Mon, 22 Oct 2018 10:27:10 +0100 From: Peter Xu Message-ID: <20181022092710.GH32717@xz-x1> References: MIME-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Disposition: inline In-Reply-To: Subject: Re: [Qemu-devel] Virtual IOMMU is working for Windows VM? List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , To: Jintack Lim Cc: QEMU Devel Mailing List On Mon, Oct 22, 2018 at 12:22:02AM -0400, Jintack Lim wrote: > Hi, > > I wonder if vIOMMU is working for Windows VM? > > I tried it with v2.11.0, but it didn't seem to work. I assume that seaBIOS > sets IOMMU on by default as is the case when I launched a Linux VM. But I > might be missing something. Can somebody shed some light on it? Hi, Jintack, I think at least the latest QEMU should work for Windows, but I don't really run Windows that frequently. What is the error you've encountered? Have you tried the latest QEMU, or switching Windows versions to try? What I can remember about Windows is that Ladi had fixed a bug for windows-only (8991c460be, "intel_iommu: relax iq tail check on VTD_GCMD_QIE enable", 2017-07-03) but it should be even in 2.10 so I guess it's not the problem you've encountered. Regards, -- Peter Xu