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=-10.8 required=3.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_CR_TRAILER, MAILING_LIST_MULTI,NICE_REPLY_A,SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED autolearn=ham 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 06B7FC433DB for ; Mon, 22 Feb 2021 11:10:33 +0000 (UTC) Received: from lists.xenproject.org (lists.xenproject.org [192.237.175.120]) (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 A3D2664E32 for ; Mon, 22 Feb 2021 11:10:32 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org A3D2664E32 Authentication-Results: mail.kernel.org; dmarc=pass (p=none dis=none) header.from=xenproject.org Authentication-Results: mail.kernel.org; spf=pass smtp.mailfrom=xen-devel-bounces@lists.xenproject.org Received: from list by lists.xenproject.org with outflank-mailman.87968.165234 (Exim 4.92) (envelope-from ) id 1lE96d-0006P5-9K; Mon, 22 Feb 2021 11:10:23 +0000 X-Outflank-Mailman: Message body and most headers restored to incoming version Received: by outflank-mailman (output) from mailman id 87968.165234; Mon, 22 Feb 2021 11:10:23 +0000 Received: from localhost ([127.0.0.1] helo=lists.xenproject.org) by lists.xenproject.org with esmtp (Exim 4.92) (envelope-from ) id 1lE96d-0006Oy-68; Mon, 22 Feb 2021 11:10:23 +0000 Received: by outflank-mailman (input) for mailman id 87968; Mon, 22 Feb 2021 11:10:22 +0000 Received: from mail.xenproject.org ([104.130.215.37]) by lists.xenproject.org with esmtp (Exim 4.92) (envelope-from ) id 1lE96c-0006Ot-Ic for xen-devel@lists.xenproject.org; Mon, 22 Feb 2021 11:10:22 +0000 Received: from xenbits.xenproject.org ([104.239.192.120]) by mail.xenproject.org with esmtp (Exim 4.92) (envelope-from ) id 1lE96c-0006fj-GD for xen-devel@lists.xenproject.org; Mon, 22 Feb 2021 11:10:22 +0000 Received: from iwj (helo=mariner.uk.xensource.com) by xenbits.xenproject.org with local-bsmtp (Exim 4.92) (envelope-from ) id 1lE96c-0005Z3-EV for xen-devel@lists.xenproject.org; Mon, 22 Feb 2021 11:10:22 +0000 Received: from iwj by mariner.uk.xensource.com with local (Exim 4.89) (envelope-from ) id 1lE96Z-0000iu-6C; Mon, 22 Feb 2021 11:10:19 +0000 X-BeenThere: xen-devel@lists.xenproject.org List-Id: Xen developer discussion List-Unsubscribe: , List-Post: List-Help: List-Subscribe: , Errors-To: xen-devel-bounces@lists.xenproject.org Precedence: list Sender: "Xen-devel" DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=xenproject.org; s=20200302mail; h=References:In-Reply-To:Subject:Cc:To:Date :Message-ID:Content-Transfer-Encoding:Content-Type:MIME-Version:From; bh=Gn3ncHkmdy8iMJV2ipgldzvFX6Ln7JH5odnom5ookYc=; b=gFwa+jkUZIseff/QPpcFeo3M8k 4hl8LsRcL0zfdihSzQ6iGmW3SE5itszcdQi2fJEN4MliHwUhVfnmHKk36ev9Ysh5Kw2CQYD0YOl9D Lv99ISAJX8RmSHxDzjV9jexT5JchQ6WBDRl9ouvjshCYmAPjweRZ5X1M4WAB2wrC2BVc=; From: Ian Jackson MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Transfer-Encoding: 7bit Message-ID: <24627.37145.647801.601857@mariner.uk.xensource.com> Date: Mon, 22 Feb 2021 11:10:17 +0000 To: Julien Grall Cc: xen-devel@lists.xenproject.org, bertrand.marquis@arm.com, Julien Grall , Stefano Stabellini , Volodymyr Babchuk Subject: Re: [PATCH for-4.15] xen/vgic: Implement write to ISPENDR in vGICv{2, 3} In-Reply-To: <20210220140412.31610-1-julien@xen.org> References: <20210220140412.31610-1-julien@xen.org> X-Mailer: VM 8.2.0b under 24.5.1 (i686-pc-linux-gnu) Julien Grall writes ("[PATCH for-4.15] xen/vgic: Implement write to ISPENDR in vGICv{2, 3}"): > From: Julien Grall > > Currently, Xen will send a data abort to a guest trying to write to the > ISPENDR. > > Unfortunately, recent version of Linux (at least 5.9+) will start > writing to the register if the interrupt needs to be re-triggered > (see the callback irq_retrigger). This can happen when a driver (such as > the xgbe network driver on AMD Seattle) re-enable an interrupt: Release-Acked-by: Ian Jackson