From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id D52C9C433F5 for ; Thu, 16 Dec 2021 08:47:38 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S235012AbhLPIri (ORCPT ); Thu, 16 Dec 2021 03:47:38 -0500 Received: from us-smtp-delivery-124.mimecast.com ([170.10.129.124]:52600 "EHLO us-smtp-delivery-124.mimecast.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S232569AbhLPIrh (ORCPT ); Thu, 16 Dec 2021 03:47:37 -0500 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1639644457; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version:content-type:content-type: in-reply-to:in-reply-to:references:references; bh=3aF2bcZ/YX1nFwYaRdoYyovSpd9ttOChaM2u5O2hEkg=; b=O9FUvAi/W45D5hw5FWd9aX6Y3I2oERU9IK5w7t0ZSODMgdb5JhPWAF2SIB3Npwcw5+yV2o 7uQiyukpRotmxNkfhKqXJIOd9CnFWPATyBsTzVm66Xu8r3EyGU3LTA2zEoPNQpyRnnD9Xp bd4nTrYQIofwr1BlONvQjO9UVx7FDGI= Received: from mail-wr1-f71.google.com (mail-wr1-f71.google.com [209.85.221.71]) by relay.mimecast.com with ESMTP with STARTTLS (version=TLSv1.2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id us-mta-93-drJDvO_jNwSUSYRErbKXfA-1; Thu, 16 Dec 2021 03:47:36 -0500 X-MC-Unique: drJDvO_jNwSUSYRErbKXfA-1 Received: by mail-wr1-f71.google.com with SMTP id v17-20020adfedd1000000b0017c5e737b02so6652106wro.18 for ; Thu, 16 Dec 2021 00:47:36 -0800 (PST) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20210112; h=x-gm-message-state:date:from:to:cc:subject:message-id:references :mime-version:content-disposition:in-reply-to; bh=3aF2bcZ/YX1nFwYaRdoYyovSpd9ttOChaM2u5O2hEkg=; b=zm5/A6GwNOkJ1tzC2JTTQe/VOKjjjz3X8mGpXHlhQ5civjVgpjj9pQ4HOafA3nh3yb xLZiXpmoTNoCrQoEGOvCRidS82IpYoknXwadc5IwDuYcRHZg0976s19PoEOZQM5LtrQE 9CQ9tPRFC4RkomnBcOIpJB2DTVbDe+2Q/Vi7a91qBthOO8y+DHlVNDVnVueKWgcvWrZ3 cR3Un2VnwFSCOTwNSmWyK9c9BTeMMCv5s7dvYVvbn+sFp4RmrU2Vz3dhDILA+uRbN7iZ 45I01ZPFu7dPY5u3r3BqtZ/SE7bCBH97Akz/DHs2/NaCweDdRik9HhqsKNVmCtRPhbIE CtjQ== X-Gm-Message-State: AOAM532Ih8uNXTmI98qJtBJAkrGJwQ8Lj+JQ9Aanzy5ZDJR3peQK1rbD 1Uou+YEQkZ1iavscVLDSCgHkLkdMOCkef1F6ge10/7lOqvABJjVSLMQYroHrYtrkAYrAOnBcvcV e1+F0XFdkasDs X-Received: by 2002:adf:d1cd:: with SMTP id b13mr8114563wrd.323.1639644455167; Thu, 16 Dec 2021 00:47:35 -0800 (PST) X-Google-Smtp-Source: ABdhPJwYRPwQ6/aG59Ien/n2wCmHAytBndcwdkmI0hS+IBvughy9MoLzIj45YQrEDoZElO6yEn65Mw== X-Received: by 2002:adf:d1cd:: with SMTP id b13mr8114543wrd.323.1639644455013; Thu, 16 Dec 2021 00:47:35 -0800 (PST) Received: from xz-m1.local ([64.64.123.12]) by smtp.gmail.com with ESMTPSA id a9sm4129960wrt.66.2021.12.16.00.47.30 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Thu, 16 Dec 2021 00:47:34 -0800 (PST) Date: Thu, 16 Dec 2021 16:47:28 +0800 From: Peter Xu To: David Woodhouse Cc: qemu-devel@nongnu.org, "Michael S. Tsirkin" , Jason Wang , Paolo Bonzini , Richard Henderson , Eduardo Habkost , Marcel Apfelbaum , Marcelo Tosatti , kvm@vger.kernel.org Subject: Re: [PATCH v2 2/4] intel_iommu: Support IR-only mode without DMA translation Message-ID: References: <20211209220840.14889-1-dwmw2@infradead.org> <20211209220840.14889-2-dwmw2@infradead.org> MIME-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Disposition: inline In-Reply-To: <20211209220840.14889-2-dwmw2@infradead.org> Precedence: bulk List-ID: X-Mailing-List: kvm@vger.kernel.org On Thu, Dec 09, 2021 at 10:08:38PM +0000, David Woodhouse wrote: > From: David Woodhouse > > By setting none of the SAGAW bits we can indicate to a guest that DMA > translation isn't supported. Tested by booting Windows 10, as well as > Linux guests with the fix at https://git.kernel.org/torvalds/c/c40aaaac10 > > Signed-off-by: David Woodhouse > Acked-by: Claudio Fontana Reviewed-by: Peter Xu -- Peter Xu