From mboxrd@z Thu Jan 1 00:00:00 1970 Received: by 2002:a05:6512:3aa:0:0:0:0 with SMTP id v10csp327409lfp; Wed, 29 Jan 2020 01:04:29 -0800 (PST) X-Google-Smtp-Source: APXvYqzfVWuP2hvQ8X32SntU8/9JKpbIv86AtOE2FXSkkC3tSopMFU8RYCPn4tVGl4fPK/tLREjy X-Received: by 2002:ac8:6f48:: with SMTP id n8mr26369285qtv.295.1580288669613; Wed, 29 Jan 2020 01:04:29 -0800 (PST) ARC-Seal: i=1; a=rsa-sha256; t=1580288669; cv=none; d=google.com; s=arc-20160816; b=bj0grjNokazfKa7lk/tKDFJs1wR0B5H8pJx01NwygEifnrRSpCp0qAKJ1b7/aMUKvX DuzewhE+lu52WZjodJrIIh5ysdeh4N8rjiq/UeE1oWM7SH9MmDprv9Rq7H81p8/Ivp7e HkC8i7gae80dGql66UVRVod7mUlLlaU1PsHW4lJG31hrdNW70EQqOSGSIAUv/io9nI5R qG83Nmugwop7+YjuLId5ejYU4U0jFvaIM71uPYAsvFhASf/D+GPGHwIqVFQhcRhkm70m haxGGkBp/ZRa4mtwk88ml2Nf1zhtREbyXAS0gt01lmBo4ChKeybVDQp87bgFBN5E8WTo Dwuw== ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=arc-20160816; h=sender:errors-to:cc:list-subscribe:list-help:list-post:list-archive :list-unsubscribe:list-id:precedence:user-agent:message-id :references:in-reply-to:subject:to:from:date :content-transfer-encoding:mime-version:dkim-signature; bh=1nPCkPNB/2sK+McgCIUHBjs7Vir8oqllrr6aIw22ris=; b=NwwguXGdlxJ6j5n+Ui9TjtMRj+yVuKoUWvRevQIvRwyTD5uu4nU7feTR3Hg9MUeQ+t BX6GHI38++FR+oxnC5nMXQBmFFHeFB6umvlPGtHHsB5qJK8pMiv8PRA3SiMAfVeAFgrV jZme+n0NiPYqQ+9p+avzG9nxOtKJ4wFZnzvT8p1TIQPooPOLLsE0HFZet4CjIqYqTVyt 1jVT8afakkH+VItTisOnb5O+mNP7lbERLyLMC/IhIvtsbLzV/ul/kUHqkN3FcuJFucFB 1Bk9VIE0zAIy5yvPRVi58m8GA3QZc7c2c/ES4QQt3+XEgPhwTajWlYpywRORJVYlc78V Abhg== ARC-Authentication-Results: i=1; mx.google.com; dkim=fail header.i=@kernel.org header.s=default header.b=VhQIWJf3; spf=pass (google.com: domain of qemu-arm-bounces+alex.bennee=linaro.org@nongnu.org designates 209.51.188.17 as permitted sender) smtp.mailfrom="qemu-arm-bounces+alex.bennee=linaro.org@nongnu.org"; dmarc=fail (p=NONE sp=NONE dis=NONE) header.from=kernel.org Return-Path: Received: from lists.gnu.org (lists.gnu.org. [209.51.188.17]) by mx.google.com with ESMTPS id e14si1019764qkg.280.2020.01.29.01.04.29 for (version=TLS1_2 cipher=ECDHE-RSA-CHACHA20-POLY1305 bits=256/256); Wed, 29 Jan 2020 01:04:29 -0800 (PST) Received-SPF: pass (google.com: domain of qemu-arm-bounces+alex.bennee=linaro.org@nongnu.org designates 209.51.188.17 as permitted sender) client-ip=209.51.188.17; Authentication-Results: mx.google.com; dkim=fail header.i=@kernel.org header.s=default header.b=VhQIWJf3; spf=pass (google.com: domain of qemu-arm-bounces+alex.bennee=linaro.org@nongnu.org designates 209.51.188.17 as permitted sender) smtp.mailfrom="qemu-arm-bounces+alex.bennee=linaro.org@nongnu.org"; dmarc=fail (p=NONE sp=NONE dis=NONE) header.from=kernel.org Received: from localhost ([::1]:42918 helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1iwjGu-0007jJ-3L for alex.bennee@linaro.org; Wed, 29 Jan 2020 04:04:28 -0500 Received: from eggs.gnu.org ([2001:470:142:3::10]:41056) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1iwjGk-0007dS-8u for qemu-arm@nongnu.org; Wed, 29 Jan 2020 04:04:19 -0500 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1iwjGj-0005Xq-24 for qemu-arm@nongnu.org; Wed, 29 Jan 2020 04:04:18 -0500 Received: from mail.kernel.org ([198.145.29.99]:45378) by eggs.gnu.org with esmtps (TLS1.0:DHE_RSA_AES_256_CBC_SHA1:32) (Exim 4.71) (envelope-from ) id 1iwjGi-0005Qf-RH; Wed, 29 Jan 2020 04:04:16 -0500 Received: from disco-boy.misterjones.org (disco-boy.misterjones.org [51.254.78.96]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPSA id 7B4AB2070E; Wed, 29 Jan 2020 09:04:15 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1580288655; bh=CMVfSWl+2XIT/jE0iJpRVzU7bkl12YJtNotQ4aZTpPk=; h=Date:From:To:Cc:Subject:In-Reply-To:References:From; b=VhQIWJf3o8U8wrj+cAI9pZfp77ocs6I2lQhUfo/CMYa5c9lwhny94UIMs7Etis/dO T5P/mTDJmnumpwg0oTihaXiCSOMdhQ4Zfdm7d9wouhygNhQm6psj+6BYJvW6J7OHSd NvU6XJ6BF4j14a6Twa7QieQMiyM6cugRE+Avtc9s= Received: from disco-boy.misterjones.org ([51.254.78.96] helo=www.loen.fr) by disco-boy.misterjones.org with esmtpsa (TLS1.2:ECDHE_RSA_AES_128_GCM_SHA256:128) (Exim 4.92) (envelope-from ) id 1iwjGf-001zDK-K4; Wed, 29 Jan 2020 09:04:13 +0000 MIME-Version: 1.0 Content-Type: text/plain; charset=US-ASCII; format=flowed Content-Transfer-Encoding: 7bit Date: Wed, 29 Jan 2020 09:04:13 +0000 From: Marc Zyngier To: Alexey Kardashevskiy Subject: Re: [RFC PATCH] hw/arm/virt: Support NMI injection In-Reply-To: <7f6e29e6-1df9-4513-79ba-b53873b0735e@ozlabs.ru> References: <20191219040612.28431-1-gshan@redhat.com> <7f6e29e6-1df9-4513-79ba-b53873b0735e@ozlabs.ru> Message-ID: <544f261e4b9c97f1d3a5fb64cef42ba5@kernel.org> X-Sender: maz@kernel.org User-Agent: Roundcube Webmail/1.3.8 X-SA-Exim-Connect-IP: 51.254.78.96 X-SA-Exim-Rcpt-To: aik@ozlabs.ru, gshan@redhat.com, qemu-arm@nongnu.org, peter.maydell@linaro.org, pbonzini@redhat.com, drjones@redhat.com, eric.auger@redhat.com, jthierry@redhat.com, shan.gavin@gmail.com, qemu-devel@nongnu.org X-SA-Exim-Mail-From: maz@kernel.org X-SA-Exim-Scanned: No (on disco-boy.misterjones.org); SAEximRunCond expanded to false X-detected-operating-system: by eggs.gnu.org: GNU/Linux 2.2.x-3.x [generic] X-Received-From: 198.145.29.99 X-BeenThere: qemu-arm@nongnu.org X-Mailman-Version: 2.1.23 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: peter.maydell@linaro.org, drjones@redhat.com, Gavin Shan , jthierry@redhat.com, qemu-devel@nongnu.org, eric.auger@redhat.com, qemu-arm@nongnu.org, shan.gavin@gmail.com, pbonzini@redhat.com Errors-To: qemu-arm-bounces+alex.bennee=linaro.org@nongnu.org Sender: "Qemu-arm" X-TUID: re3La3WEXSI1 On 2020-01-29 02:44, Alexey Kardashevskiy wrote: > On 28/01/2020 17:48, Gavin Shan wrote: >> but a NMI is injected >> through LAPIC on x86. So I'm not sure what architect (system reset on >> ppc or injecting NMI on x86) aarch64 should follow. > > I'd say whatever triggers in-kernel debugger or kdump but I am not > familiar with ARM at all :) All that is completely OS specific, and has no relation to the architecture. As I mentioned in another part of the thread, the closest thing to this would be to implement SDEI together with an IMPDEF mechanism to enter it (or even generate a RAS error). On the other hand, SDEI is pretty horrible, and means either KVM or QEMU acting like a firmware for the guest. To say that I'm not keen is a massive understatement. M. -- Jazz is not dead. It just smells funny...