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=-0.8 required=3.0 tests=DKIM_INVALID,DKIM_SIGNED, MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS 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 25855C4332B for ; Thu, 19 Mar 2020 12:18:45 +0000 (UTC) Received: from mm01.cs.columbia.edu (mm01.cs.columbia.edu [128.59.11.253]) by mail.kernel.org (Postfix) with ESMTP id A14A120739 for ; Thu, 19 Mar 2020 12:18:44 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=fail reason="signature verification failed" (1024-bit key) header.d=kernel.org header.i=@kernel.org header.b="hMSyvzWu" DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org A14A120739 Authentication-Results: mail.kernel.org; dmarc=fail (p=none dis=none) header.from=kernel.org Authentication-Results: mail.kernel.org; spf=pass smtp.mailfrom=kvmarm-bounces@lists.cs.columbia.edu Received: from localhost (localhost [127.0.0.1]) by mm01.cs.columbia.edu (Postfix) with ESMTP id 3A5B34A4A0; Thu, 19 Mar 2020 08:18:44 -0400 (EDT) X-Virus-Scanned: at lists.cs.columbia.edu Authentication-Results: mm01.cs.columbia.edu (amavisd-new); dkim=softfail (fail, message has been altered) header.i=@kernel.org Received: from mm01.cs.columbia.edu ([127.0.0.1]) by localhost (mm01.cs.columbia.edu [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id Ot5FjFZ2m+eF; Thu, 19 Mar 2020 08:18:43 -0400 (EDT) Received: from mm01.cs.columbia.edu (localhost [127.0.0.1]) by mm01.cs.columbia.edu (Postfix) with ESMTP id 2426F4B08D; Thu, 19 Mar 2020 08:18:43 -0400 (EDT) Received: from localhost (localhost [127.0.0.1]) by mm01.cs.columbia.edu (Postfix) with ESMTP id 91D9C4A4AA for ; Thu, 19 Mar 2020 08:18:42 -0400 (EDT) X-Virus-Scanned: at lists.cs.columbia.edu Received: from mm01.cs.columbia.edu ([127.0.0.1]) by localhost (mm01.cs.columbia.edu [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id CC3c++k5UHwi for ; Thu, 19 Mar 2020 08:18:41 -0400 (EDT) Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by mm01.cs.columbia.edu (Postfix) with ESMTPS id 98F854A4A0 for ; Thu, 19 Mar 2020 08:18:41 -0400 (EDT) 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 6518E20663; Thu, 19 Mar 2020 12:18:40 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1584620320; bh=9n5iSscoqYAjXl49/svHpLf5qsJKzfPfCazHWgnTthY=; h=Date:From:To:Cc:Subject:In-Reply-To:References:From; b=hMSyvzWudmn5PzqltwH9zVaoJflLaueZMoY7JuIBTmbwkmjCNT2hHrPKP5wQH72Yh QFw0yTyO2UEaw6WkBq6MKpEtt6gXN8nHKmL84bm4cma4fb8H2wB9x2hE3YrL1/HpSO TyT89wwVpUtFpxgCHtakHPiwm6ZKyuZAtda9p8uI= 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 1jEu8E-00Dvom-M6; Thu, 19 Mar 2020 12:18:38 +0000 MIME-Version: 1.0 Date: Thu, 19 Mar 2020 12:18:38 +0000 From: Marc Zyngier To: Zenghui Yu Subject: Re: [PATCH v5 21/23] KVM: arm64: GICv4.1: Reload VLPI configuration on distributor enable/disable In-Reply-To: <7f112d75-166b-24eb-538d-e100242d8e9a@huawei.com> References: <20200304203330.4967-1-maz@kernel.org> <20200304203330.4967-22-maz@kernel.org> <7f112d75-166b-24eb-538d-e100242d8e9a@huawei.com> Message-ID: X-Sender: maz@kernel.org User-Agent: Roundcube Webmail/1.3.10 X-SA-Exim-Connect-IP: 51.254.78.96 X-SA-Exim-Rcpt-To: yuzenghui@huawei.com, linux-arm-kernel@lists.infradead.org, kvmarm@lists.cs.columbia.edu, kvm@vger.kernel.org, linux-kernel@vger.kernel.org, lorenzo.pieralisi@arm.com, jason@lakedaemon.net, rrichter@marvell.com, tglx@linutronix.de, eric.auger@redhat.com, james.morse@arm.com, julien.thierry.kdev@gmail.com, suzuki.poulose@arm.com X-SA-Exim-Mail-From: maz@kernel.org X-SA-Exim-Scanned: No (on disco-boy.misterjones.org); SAEximRunCond expanded to false Cc: Lorenzo Pieralisi , Jason Cooper , kvm@vger.kernel.org, linux-kernel@vger.kernel.org, Robert Richter , Thomas Gleixner , kvmarm@lists.cs.columbia.edu, linux-arm-kernel@lists.infradead.org X-BeenThere: kvmarm@lists.cs.columbia.edu X-Mailman-Version: 2.1.14 Precedence: list List-Id: Where KVM/ARM decisions are made List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Content-Transfer-Encoding: 7bit Content-Type: text/plain; charset="us-ascii"; Format="flowed" Errors-To: kvmarm-bounces@lists.cs.columbia.edu Sender: kvmarm-bounces@lists.cs.columbia.edu On 2020-03-18 03:17, Zenghui Yu wrote: > On 2020/3/5 4:33, Marc Zyngier wrote: >> Each time a Group-enable bit gets flipped, the state of these bits >> needs to be forwarded to the hardware. This is a pretty heavy >> handed operation, requiring all vcpus to reload their GICv4 >> configuration. It is thus implemented as a new request type. > > [note to myself] > ... and the status are forwarded to HW by programming VGrp{0,1}En > fields of GICR_VPENDBASER when vPEs are made resident next time. I've added something based on this comment to the commit message. Thanks! M. -- Jazz is not dead. It just smells funny... _______________________________________________ kvmarm mailing list kvmarm@lists.cs.columbia.edu https://lists.cs.columbia.edu/mailman/listinfo/kvmarm 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=-1.0 required=3.0 tests=DKIMWL_WL_HIGH,DKIM_SIGNED, DKIM_VALID,MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS 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 2B503C4332D for ; Thu, 19 Mar 2020 12:18:48 +0000 (UTC) Received: from bombadil.infradead.org (bombadil.infradead.org [198.137.202.133]) (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 E8EB820663 for ; Thu, 19 Mar 2020 12:18:47 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=lists.infradead.org header.i=@lists.infradead.org header.b="jJTUIDzR"; dkim=fail reason="signature verification failed" (1024-bit key) header.d=kernel.org header.i=@kernel.org header.b="hMSyvzWu" DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org E8EB820663 Authentication-Results: mail.kernel.org; dmarc=fail (p=none dis=none) header.from=kernel.org Authentication-Results: mail.kernel.org; spf=none smtp.mailfrom=linux-arm-kernel-bounces+infradead-linux-arm-kernel=archiver.kernel.org@lists.infradead.org DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20170209; h=Sender:Content-Type: Content-Transfer-Encoding:Cc:List-Subscribe:List-Help:List-Post:List-Archive: List-Unsubscribe:List-Id:Message-ID:References:In-Reply-To:Subject:To:From: Date:MIME-Version:Reply-To:Content-ID:Content-Description:Resent-Date: Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID:List-Owner; bh=d/wwD8g721Zvx9lOywrvQq9ann/ny/5sCj6BoYJnEDs=; b=jJTUIDzRPxcBBDNyvq5TwBDxf UouLbhXStWuy2k4BLNJJj86qOuRpT39SO6shKAPibbPQyCoo08b+sR0LWvR/I4sU6xwn511likkBO 5edJXm/A3vwNIJwVYLOF6mG0V/Ip3ut29SBVaZTPOzQUQyFjv94dzXLgPC/WupsCeQcGa0qtGOmBW 6JsDD8uxVIfs5LXQBl3LViSgyltCXP0mGzUPDwTU+mBsyBBFDZclzTVyfkL+SbequCOopVIQYY+pK 9txpi0qpqOWlYM/VVecfjKriPEeuKL53SOWLOdHWjNNC+k9syo/nvwvPRCB+BdLF7Ww19uFXrUaEX yhKMfUzLw==; Received: from localhost ([127.0.0.1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.92.3 #3 (Red Hat Linux)) id 1jEu8K-0000uB-BU; Thu, 19 Mar 2020 12:18:44 +0000 Received: from mail.kernel.org ([198.145.29.99]) by bombadil.infradead.org with esmtps (Exim 4.92.3 #3 (Red Hat Linux)) id 1jEu8G-0000tl-Sj for linux-arm-kernel@lists.infradead.org; Thu, 19 Mar 2020 12:18:42 +0000 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 6518E20663; Thu, 19 Mar 2020 12:18:40 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1584620320; bh=9n5iSscoqYAjXl49/svHpLf5qsJKzfPfCazHWgnTthY=; h=Date:From:To:Cc:Subject:In-Reply-To:References:From; b=hMSyvzWudmn5PzqltwH9zVaoJflLaueZMoY7JuIBTmbwkmjCNT2hHrPKP5wQH72Yh QFw0yTyO2UEaw6WkBq6MKpEtt6gXN8nHKmL84bm4cma4fb8H2wB9x2hE3YrL1/HpSO TyT89wwVpUtFpxgCHtakHPiwm6ZKyuZAtda9p8uI= 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 1jEu8E-00Dvom-M6; Thu, 19 Mar 2020 12:18:38 +0000 MIME-Version: 1.0 Date: Thu, 19 Mar 2020 12:18:38 +0000 From: Marc Zyngier To: Zenghui Yu Subject: Re: [PATCH v5 21/23] KVM: arm64: GICv4.1: Reload VLPI configuration on distributor enable/disable In-Reply-To: <7f112d75-166b-24eb-538d-e100242d8e9a@huawei.com> References: <20200304203330.4967-1-maz@kernel.org> <20200304203330.4967-22-maz@kernel.org> <7f112d75-166b-24eb-538d-e100242d8e9a@huawei.com> Message-ID: X-Sender: maz@kernel.org User-Agent: Roundcube Webmail/1.3.10 X-SA-Exim-Connect-IP: 51.254.78.96 X-SA-Exim-Rcpt-To: yuzenghui@huawei.com, linux-arm-kernel@lists.infradead.org, kvmarm@lists.cs.columbia.edu, kvm@vger.kernel.org, linux-kernel@vger.kernel.org, lorenzo.pieralisi@arm.com, jason@lakedaemon.net, rrichter@marvell.com, tglx@linutronix.de, eric.auger@redhat.com, james.morse@arm.com, julien.thierry.kdev@gmail.com, suzuki.poulose@arm.com X-SA-Exim-Mail-From: maz@kernel.org X-SA-Exim-Scanned: No (on disco-boy.misterjones.org); SAEximRunCond expanded to false X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20200319_051840_954460_A9A488CA X-CRM114-Status: UNSURE ( 8.59 ) X-CRM114-Notice: Please train this message. X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: Lorenzo Pieralisi , Jason Cooper , kvm@vger.kernel.org, Suzuki K Poulose , linux-kernel@vger.kernel.org, Eric Auger , Robert Richter , James Morse , Julien Thierry , Thomas Gleixner , kvmarm@lists.cs.columbia.edu, linux-arm-kernel@lists.infradead.org Content-Transfer-Encoding: 7bit Content-Type: text/plain; charset="us-ascii"; Format="flowed" Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+infradead-linux-arm-kernel=archiver.kernel.org@lists.infradead.org On 2020-03-18 03:17, Zenghui Yu wrote: > On 2020/3/5 4:33, Marc Zyngier wrote: >> Each time a Group-enable bit gets flipped, the state of these bits >> needs to be forwarded to the hardware. This is a pretty heavy >> handed operation, requiring all vcpus to reload their GICv4 >> configuration. It is thus implemented as a new request type. > > [note to myself] > ... and the status are forwarded to HW by programming VGrp{0,1}En > fields of GICR_VPENDBASER when vPEs are made resident next time. I've added something based on this comment to the commit message. Thanks! M. -- Jazz is not dead. It just smells funny... _______________________________________________ linux-arm-kernel mailing list linux-arm-kernel@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-arm-kernel 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=-1.1 required=3.0 tests=DKIMWL_WL_HIGH,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS 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 2300BC4332D for ; Thu, 19 Mar 2020 12:18:44 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id EF17B20739 for ; Thu, 19 Mar 2020 12:18:43 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1584620324; bh=9n5iSscoqYAjXl49/svHpLf5qsJKzfPfCazHWgnTthY=; h=Date:From:To:Cc:Subject:In-Reply-To:References:List-ID:From; b=OjpixaUICXiDcCmZ6xBJExMwUrx/kLV34NiFvkkyLHhey0WmTxEilL3YXTlshb/Kb UHL4t0Hv/Ux9wf7JO5wMnVfFyLcLG/7eH3UoityRRhftlae4TgTX43YV+uoJhv5VXt bGIjVUVccDgUAJPx4uSME3qQZSbRsSlo1P5+Zf+0= Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1726867AbgCSMSl (ORCPT ); Thu, 19 Mar 2020 08:18:41 -0400 Received: from mail.kernel.org ([198.145.29.99]:60278 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1725787AbgCSMSl (ORCPT ); Thu, 19 Mar 2020 08:18:41 -0400 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 6518E20663; Thu, 19 Mar 2020 12:18:40 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1584620320; bh=9n5iSscoqYAjXl49/svHpLf5qsJKzfPfCazHWgnTthY=; h=Date:From:To:Cc:Subject:In-Reply-To:References:From; b=hMSyvzWudmn5PzqltwH9zVaoJflLaueZMoY7JuIBTmbwkmjCNT2hHrPKP5wQH72Yh QFw0yTyO2UEaw6WkBq6MKpEtt6gXN8nHKmL84bm4cma4fb8H2wB9x2hE3YrL1/HpSO TyT89wwVpUtFpxgCHtakHPiwm6ZKyuZAtda9p8uI= 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 1jEu8E-00Dvom-M6; Thu, 19 Mar 2020 12:18:38 +0000 MIME-Version: 1.0 Content-Type: text/plain; charset=US-ASCII; format=flowed Content-Transfer-Encoding: 7bit Date: Thu, 19 Mar 2020 12:18:38 +0000 From: Marc Zyngier To: Zenghui Yu Cc: linux-arm-kernel@lists.infradead.org, kvmarm@lists.cs.columbia.edu, kvm@vger.kernel.org, linux-kernel@vger.kernel.org, Lorenzo Pieralisi , Jason Cooper , Robert Richter , Thomas Gleixner , Eric Auger , James Morse , Julien Thierry , Suzuki K Poulose Subject: Re: [PATCH v5 21/23] KVM: arm64: GICv4.1: Reload VLPI configuration on distributor enable/disable In-Reply-To: <7f112d75-166b-24eb-538d-e100242d8e9a@huawei.com> References: <20200304203330.4967-1-maz@kernel.org> <20200304203330.4967-22-maz@kernel.org> <7f112d75-166b-24eb-538d-e100242d8e9a@huawei.com> Message-ID: X-Sender: maz@kernel.org User-Agent: Roundcube Webmail/1.3.10 X-SA-Exim-Connect-IP: 51.254.78.96 X-SA-Exim-Rcpt-To: yuzenghui@huawei.com, linux-arm-kernel@lists.infradead.org, kvmarm@lists.cs.columbia.edu, kvm@vger.kernel.org, linux-kernel@vger.kernel.org, lorenzo.pieralisi@arm.com, jason@lakedaemon.net, rrichter@marvell.com, tglx@linutronix.de, eric.auger@redhat.com, james.morse@arm.com, julien.thierry.kdev@gmail.com, suzuki.poulose@arm.com X-SA-Exim-Mail-From: maz@kernel.org X-SA-Exim-Scanned: No (on disco-boy.misterjones.org); SAEximRunCond expanded to false Sender: kvm-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: kvm@vger.kernel.org On 2020-03-18 03:17, Zenghui Yu wrote: > On 2020/3/5 4:33, Marc Zyngier wrote: >> Each time a Group-enable bit gets flipped, the state of these bits >> needs to be forwarded to the hardware. This is a pretty heavy >> handed operation, requiring all vcpus to reload their GICv4 >> configuration. It is thus implemented as a new request type. > > [note to myself] > ... and the status are forwarded to HW by programming VGrp{0,1}En > fields of GICR_VPENDBASER when vPEs are made resident next time. I've added something based on this comment to the commit message. Thanks! M. -- Jazz is not dead. It just smells funny...