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 X-Spam-Level: X-Spam-Status: No, score=-2.0 required=3.0 tests=DKIM_INVALID,DKIM_SIGNED, HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS, USER_AGENT_SANE_1 autolearn=no autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id E3C2EC8300A for ; Thu, 30 Apr 2020 10:40:24 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id BEF87214D8 for ; Thu, 30 Apr 2020 10:40:24 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=fail reason="signature verification failed" (1024-bit key) header.d=mg.codeaurora.org header.i=@mg.codeaurora.org header.b="jlmqc0IT" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1726930AbgD3KkX (ORCPT ); Thu, 30 Apr 2020 06:40:23 -0400 Received: from mail27.static.mailgun.info ([104.130.122.27]:51150 "EHLO mail27.static.mailgun.info" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726127AbgD3KkX (ORCPT ); Thu, 30 Apr 2020 06:40:23 -0400 DKIM-Signature: a=rsa-sha256; v=1; c=relaxed/relaxed; d=mg.codeaurora.org; q=dns/txt; s=smtp; t=1588243222; h=In-Reply-To: Content-Type: MIME-Version: References: Reply-To: Message-ID: Subject: Cc: To: From: Date: Sender; bh=3iE9hjbZSe6ch4LQtq3ut0I5M3jpYxJ5SilmB8NMlEA=; b=jlmqc0ITSyUTGx+TUAmlp/jxnJMZU/Wh7rEZWamOeygcqAekIA6x47uGRuDBDTzeDrDqcgmy j/M5QV8X4koUs8deA3pv1+yHFiGvj6dB7LagLZJ+03bLAH3PPngUUZ0xYD05020xVO1rSQQB FNXZPYdHN35JE2+kXd4crjuEtsc= X-Mailgun-Sending-Ip: 104.130.122.27 X-Mailgun-Sid: WyI0MWYwYSIsICJsaW51eC1rZXJuZWxAdmdlci5rZXJuZWwub3JnIiwgImJlOWU0YSJd Received: from smtp.codeaurora.org (ec2-35-166-182-171.us-west-2.compute.amazonaws.com [35.166.182.171]) by mxa.mailgun.org with ESMTP id 5eaaab0e.7fe1f29b3650-smtp-out-n05; Thu, 30 Apr 2020 10:40:14 -0000 (UTC) Received: by smtp.codeaurora.org (Postfix, from userid 1001) id 3CED9C44791; Thu, 30 Apr 2020 10:40:13 +0000 (UTC) Received: from quicinc.com (blr-bdr-fw-01_GlobalNAT_AllZones-Outside.qualcomm.com [103.229.18.19]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) (Authenticated sender: svaddagi) by smtp.codeaurora.org (Postfix) with ESMTPSA id 306C5C433F2; Thu, 30 Apr 2020 10:40:07 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 smtp.codeaurora.org 306C5C433F2 Authentication-Results: aws-us-west-2-caf-mail-1.web.codeaurora.org; dmarc=none (p=none dis=none) header.from=codeaurora.org Authentication-Results: aws-us-west-2-caf-mail-1.web.codeaurora.org; spf=none smtp.mailfrom=vatsa@codeaurora.org Date: Thu, 30 Apr 2020 16:10:05 +0530 From: Srivatsa Vaddagiri To: "Michael S. Tsirkin" Cc: konrad.wilk@oracle.com, jasowang@redhat.com, jan.kiszka@siemens.com, will@kernel.org, stefano.stabellini@xilinx.com, iommu@lists.linux-foundation.org, virtualization@lists.linux-foundation.org, virtio-dev@lists.oasis-open.org, tsoni@codeaurora.org, pratikp@codeaurora.org, christoffer.dall@arm.com, alex.bennee@linaro.org, linux-kernel@vger.kernel.org Subject: Re: [RFC/PATCH 0/1] virtio_mmio: hypervisor specific interfaces for MMIO Message-ID: <20200430104004.GA3204@quicinc.com> Reply-To: Srivatsa Vaddagiri References: <1588240976-10213-1-git-send-email-vatsa@codeaurora.org> <20200430060653-mutt-send-email-mst@kernel.org> MIME-Version: 1.0 Content-Type: text/plain; charset=iso-8859-1 Content-Disposition: inline In-Reply-To: <20200430060653-mutt-send-email-mst@kernel.org> User-Agent: Mutt/1.5.24 (2015-08-30) Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org * Michael S. Tsirkin [2020-04-30 06:07:56]: > On Thu, Apr 30, 2020 at 03:32:55PM +0530, Srivatsa Vaddagiri wrote: > > The Type-1 hypervisor we are dealing with does not allow for MMIO transport. > > How about PCI then? Correct me if I am wrong, but basically virtio_pci uses the same low-level primitive as readl/writel on a platform such as ARM64? So similar issues there also. -- QUALCOMM INDIA, on behalf of Qualcomm Innovation Center, Inc. is a member of Code Aurora Forum, hosted by The Linux Foundation 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 X-Spam-Level: X-Spam-Status: No, score=-2.0 required=3.0 tests=DKIM_INVALID,DKIM_SIGNED, HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS, USER_AGENT_SANE_1 autolearn=no autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id F0360C8300B for ; Thu, 30 Apr 2020 10:40:23 +0000 (UTC) Received: from fraxinus.osuosl.org (smtp4.osuosl.org [140.211.166.137]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPS id B836520838 for ; Thu, 30 Apr 2020 10:40:23 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=fail reason="signature verification failed" (1024-bit key) header.d=mg.codeaurora.org header.i=@mg.codeaurora.org header.b="noUDw+7x" DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org B836520838 Authentication-Results: mail.kernel.org; dmarc=none (p=none dis=none) header.from=codeaurora.org Authentication-Results: mail.kernel.org; spf=pass smtp.mailfrom=iommu-bounces@lists.linux-foundation.org Received: from localhost (localhost [127.0.0.1]) by fraxinus.osuosl.org (Postfix) with ESMTP id 7FEDD86481; Thu, 30 Apr 2020 10:40:23 +0000 (UTC) X-Virus-Scanned: amavisd-new at osuosl.org Received: from fraxinus.osuosl.org ([127.0.0.1]) by localhost (.osuosl.org [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id 67tPfQHOOACW; Thu, 30 Apr 2020 10:40:23 +0000 (UTC) Received: from lists.linuxfoundation.org (lf-lists.osuosl.org [140.211.9.56]) by fraxinus.osuosl.org (Postfix) with ESMTP id 20EBE86278; Thu, 30 Apr 2020 10:40:23 +0000 (UTC) Received: from lf-lists.osuosl.org (localhost [127.0.0.1]) by lists.linuxfoundation.org (Postfix) with ESMTP id 0CA02C0864; Thu, 30 Apr 2020 10:40:23 +0000 (UTC) Received: from hemlock.osuosl.org (smtp2.osuosl.org [140.211.166.133]) by lists.linuxfoundation.org (Postfix) with ESMTP id 99F23C016F for ; Thu, 30 Apr 2020 10:40:21 +0000 (UTC) Received: from localhost (localhost [127.0.0.1]) by hemlock.osuosl.org (Postfix) with ESMTP id 8615C8867E for ; Thu, 30 Apr 2020 10:40:21 +0000 (UTC) X-Virus-Scanned: amavisd-new at osuosl.org Received: from hemlock.osuosl.org ([127.0.0.1]) by localhost (.osuosl.org [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id qOVa4OnIRgIK for ; Thu, 30 Apr 2020 10:40:21 +0000 (UTC) X-Greylist: from auto-whitelisted by SQLgrey-1.7.6 Received: from mail26.static.mailgun.info (mail26.static.mailgun.info [104.130.122.26]) by hemlock.osuosl.org (Postfix) with ESMTPS id 7B55088660 for ; Thu, 30 Apr 2020 10:40:18 +0000 (UTC) DKIM-Signature: a=rsa-sha256; v=1; c=relaxed/relaxed; d=mg.codeaurora.org; q=dns/txt; s=smtp; t=1588243221; h=In-Reply-To: Content-Type: MIME-Version: References: Reply-To: Message-ID: Subject: Cc: To: From: Date: Sender; bh=3iE9hjbZSe6ch4LQtq3ut0I5M3jpYxJ5SilmB8NMlEA=; b=noUDw+7xo2qxL1Zman8D3mK+F3zP7xV1dfCNgjKBCKVBOMTQRcCvEHMrqbxs9L2JAv3FiwqY sxmlSOZYSru3denLCEaHx6SrgpyTZmn4mIeMAEkBNPlXHmpnRBh/TNEqD79bw/7UCbz7W3xk 1KyIHCnC+MTKsp3XxouFs5zWK68= X-Mailgun-Sending-Ip: 104.130.122.26 X-Mailgun-Sid: WyI3NDkwMCIsICJpb21tdUBsaXN0cy5saW51eC1mb3VuZGF0aW9uLm9yZyIsICJiZTllNGEiXQ== Received: from smtp.codeaurora.org (ec2-35-166-182-171.us-west-2.compute.amazonaws.com [35.166.182.171]) by mxa.mailgun.org with ESMTP id 5eaaab0e.7f19b6b57618-smtp-out-n02; Thu, 30 Apr 2020 10:40:14 -0000 (UTC) Received: by smtp.codeaurora.org (Postfix, from userid 1001) id 0C20FC43637; Thu, 30 Apr 2020 10:40:13 +0000 (UTC) Received: from quicinc.com (blr-bdr-fw-01_GlobalNAT_AllZones-Outside.qualcomm.com [103.229.18.19]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) (Authenticated sender: svaddagi) by smtp.codeaurora.org (Postfix) with ESMTPSA id 306C5C433F2; Thu, 30 Apr 2020 10:40:07 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 smtp.codeaurora.org 306C5C433F2 Authentication-Results: aws-us-west-2-caf-mail-1.web.codeaurora.org; dmarc=none (p=none dis=none) header.from=codeaurora.org Authentication-Results: aws-us-west-2-caf-mail-1.web.codeaurora.org; spf=none smtp.mailfrom=vatsa@codeaurora.org Date: Thu, 30 Apr 2020 16:10:05 +0530 From: Srivatsa Vaddagiri To: "Michael S. Tsirkin" Subject: Re: [RFC/PATCH 0/1] virtio_mmio: hypervisor specific interfaces for MMIO Message-ID: <20200430104004.GA3204@quicinc.com> References: <1588240976-10213-1-git-send-email-vatsa@codeaurora.org> <20200430060653-mutt-send-email-mst@kernel.org> MIME-Version: 1.0 Content-Disposition: inline In-Reply-To: <20200430060653-mutt-send-email-mst@kernel.org> User-Agent: Mutt/1.5.24 (2015-08-30) Cc: tsoni@codeaurora.org, virtio-dev@lists.oasis-open.org, konrad.wilk@oracle.com, jan.kiszka@siemens.com, jasowang@redhat.com, christoffer.dall@arm.com, virtualization@lists.linux-foundation.org, alex.bennee@linaro.org, iommu@lists.linux-foundation.org, stefano.stabellini@xilinx.com, will@kernel.org, linux-kernel@vger.kernel.org, pratikp@codeaurora.org X-BeenThere: iommu@lists.linux-foundation.org X-Mailman-Version: 2.1.15 Precedence: list List-Id: Development issues for Linux IOMMU support List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Reply-To: Srivatsa Vaddagiri Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Errors-To: iommu-bounces@lists.linux-foundation.org Sender: "iommu" * Michael S. Tsirkin [2020-04-30 06:07:56]: > On Thu, Apr 30, 2020 at 03:32:55PM +0530, Srivatsa Vaddagiri wrote: > > The Type-1 hypervisor we are dealing with does not allow for MMIO transport. > > How about PCI then? Correct me if I am wrong, but basically virtio_pci uses the same low-level primitive as readl/writel on a platform such as ARM64? So similar issues there also. -- QUALCOMM INDIA, on behalf of Qualcomm Innovation Center, Inc. is a member of Code Aurora Forum, hosted by The Linux Foundation _______________________________________________ iommu mailing list iommu@lists.linux-foundation.org https://lists.linuxfoundation.org/mailman/listinfo/iommu