From patchwork Wed Mar 4 20:33:07 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Marc Zyngier X-Patchwork-Id: 11420697 Return-Path: Received: from mail.kernel.org (pdx-korg-mail-1.web.codeaurora.org [172.30.200.123]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id 1FDDA14B7 for ; Wed, 4 Mar 2020 20:35:08 +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 C4FB42146E for ; Wed, 4 Mar 2020 20:35:07 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=lists.infradead.org header.i=@lists.infradead.org header.b="H2OXHKlW"; dkim=fail reason="signature verification failed" (1024-bit key) header.d=kernel.org header.i=@kernel.org header.b="fMndKntS" DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org C4FB42146E 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+patchwork-linux-arm=patchwork.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-Transfer-Encoding:Content-Type:Cc:List-Subscribe:List-Help:List-Post: List-Archive:List-Unsubscribe:List-Id:MIME-Version:Message-Id:Date:Subject:To :From:Reply-To:Content-ID:Content-Description:Resent-Date:Resent-From: Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID:In-Reply-To:References: List-Owner; bh=k03ozTq5RAEsQWRTD+dTeqPb5eNeBewVQfY6QGfcA5k=; b=H2OXHKlWyWPQ+c EqPo7G99qXf5ejrALWefKzlfEP9HO5ujC4SmbFE0TL9Jt9ePYk94NJ99H5an5nLDVwvG1wNYRR6Mc B2NrnTAOehYAbvZtvdBH0nx9zscYgqtc5NsOCeH6URsAda1TTHMY6FBpTjTGY40PpDMq6UtL+JBSq icVTCb7CgBTJyx8/Zfjk9d2vOP8kXqJWddHgCCQi21X3d2GN5kKdDFYLdW7wx/YfEMh4yKzc9NA+z LAQYiMbY2OEJAcc9B6FwyK9nqBPspzOmtPXinNkca1t2gL8Zdl0VsYFPP+/2bdmlXqzt0xyhwMRga dKl74JekaaTX1QY98d/g==; 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 1j9ajM-0001vn-5Z; Wed, 04 Mar 2020 20:35:00 +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 1j9aj3-0001hV-4l for linux-arm-kernel@lists.infradead.org; Wed, 04 Mar 2020 20:34:42 +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 0590F2146E; Wed, 4 Mar 2020 20:34:40 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1583354080; bh=EccRIJfqWszlojINoiDMmQQnsb0+rQyVI2xUVh/plgk=; h=From:To:Cc:Subject:Date:From; b=fMndKntSxrYcdIzHDf5W7dfxHX7dqrNrLDlG2f+x9yUL2diG3BWQOKaiiVgxGe50h fLicNAlpoKOsdxImuN6PZ5YKOB6t+hq5olmAvhEADhkqm2GLPousO7zHr+K0fQnHK8 MYX+oVMUXX8qMT9N57gTTg233z6EuIl0rgDmxVeg= Received: from 78.163-31-62.static.virginmediabusiness.co.uk ([62.31.163.78] helo=why.lan) by disco-boy.misterjones.org with esmtpsa (TLS1.3:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.92) (envelope-from ) id 1j9aiz-00A59R-EB; Wed, 04 Mar 2020 20:34:37 +0000 From: Marc Zyngier To: linux-arm-kernel@lists.infradead.org, kvmarm@lists.cs.columbia.edu, kvm@vger.kernel.org, linux-kernel@vger.kernel.org Subject: [PATCH v5 00/23] irqchip/gic-v4: GICv4.1 architecture support Date: Wed, 4 Mar 2020 20:33:07 +0000 Message-Id: <20200304203330.4967-1-maz@kernel.org> X-Mailer: git-send-email 2.20.1 MIME-Version: 1.0 X-SA-Exim-Connect-IP: 62.31.163.78 X-SA-Exim-Rcpt-To: 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, yuzenghui@huawei.com, 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-20200304_123441_229045_38FDCFA7 X-CRM114-Status: GOOD ( 19.10 ) X-Spam-Score: -5.2 (-----) X-Spam-Report: SpamAssassin version 3.4.3 on bombadil.infradead.org summary: Content analysis details: (-5.2 points) pts rule name description ---- ---------------------- -------------------------------------------------- -5.0 RCVD_IN_DNSWL_HI RBL: Sender listed at https://www.dnswl.org/, high trust [198.145.29.99 listed in list.dnswl.org] -0.0 SPF_PASS SPF: sender matches SPF record 0.0 SPF_HELO_NONE SPF: HELO does not publish an SPF Record -0.1 DKIM_VALID_EF Message has a valid DKIM or DK signature from envelope-from domain -0.1 DKIM_VALID Message has at least one valid DKIM or DK signature -0.1 DKIM_VALID_AU Message has a valid DKIM or DK signature from author's domain 0.1 DKIM_SIGNED Message has a DKIM or DK signature, not necessarily valid -0.0 DKIMWL_WL_HIGH DKIMwl.org - Whitelisted High sender 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 , Suzuki K Poulose , Eric Auger , Robert Richter , James Morse , Zenghui Yu , Thomas Gleixner , Julien Thierry Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+patchwork-linux-arm=patchwork.kernel.org@lists.infradead.org This (now shorter) series expands the existing GICv4 support to deal with the new GICv4.1 architecture, which comes with a set of major improvements compared to v4.0: - One architectural doorbell per vcpu, instead of one doorbell per VLPI - Doorbell entirely managed by the HW, with an "at most once" delivery guarantee per non-residency phase and only when requested by the hypervisor - A shared memory scheme between ITSs and redistributors, allowing for an optimised residency sequence (the use of VMOVP becomes less frequent) - Support for direct virtual SGI delivery (the injection path still involves the hypervisor), at the cost of losing the active state on SGIs. It shouldn't be a big deal, but some guest operating systems might notice (Linux definitely won't care). On the other hand, public documentation is not available yet, so that's a bit annoying... The series is roughly organised in 3 parts: (0) Fixes (1) v4.1 doorbell management (2) Virtual SGI support (3) Plumbing of virtual SGIs in KVM Notes: - The whole thing is tested on a FVP model, which can be obtained free of charge on ARM's developer website. It requires you to create an account, unfortunately... You'll need a fix for the devicetree that is in the kernel tree (should be merged before the 5.6 release). - This series has uncovered a behaviour that looks like a HW bug on the Cavium ThunderX (aka TX1) platform. I'd very much welcome some clarification from the Marvell/Cavium folks on Cc, as well as an official erratum number if this happens to be an actual bug. [v3 update] People have ignored for two months now, and it is fairly obvious that support for this machine is slowly bit-rotting. Maybe I'll drop the patch and instead start the process of removing all TX1 support from the kernel (we'd certainly be better off without it). [v4 update] TX1 is now broken in mainline, and nobody cares. Make of this what you want. - I'm extremely grateful for Zenghui Yu's huge effort in carefully reviewing this rather difficult series (if we ever get to meet face to face, drinks are definitely on me!). - Unless someone cries wolf, I plan to take this into 5.7. * From v4 [4] - Rebased on v5.6-rc4 - Fixed locking all over the shop now that we can bypass the ITS - Wait on INVALL at the RD level - Plentu of cleanups/fixes thanks to Zenghui's careful review effort * From v3 [3]: - Rebased on v5.6-rc1 - Considerably smaller thanks to the initial patches being merged - Small bug fix after the v5.6 merge window * From v2 [2]: - Another bunch of fixes thanks to Zenghui Yu's very careful review - HW-accelerated SGIs are now optional thanks to new architected discovery/selection bits exposed by KVM and used by the guest kernel - Rebased on v5.5-rc2 * From v1 [1]: - A bunch of minor reworks after Zenghui Yu's review - A workaround for what looks like a new and unexpected TX1 bug - A subtle reorder of the series so that some patches can go in early [1] https://lore.kernel.org/lkml/20190923182606.32100-1-maz@kernel.org/ [2] https://lore.kernel.org/lkml/20191027144234.8395-1-maz@kernel.org/ [3] https://lore.kernel.org/r/20191224111055.11836-1-maz@kernel.org/ [4] https://lore.kernel.org/r/20200214145736.18550-1-maz@kernel.org/ Marc Zyngier (22): irqchip/gic-v3: Use SGIs without active state if offered irqchip/gic-v4.1: Skip absent CPUs while iterating over redistributors irqchip/gic-v4.1: Ensure mutual exclusion between vPE affinity change and RD access irqchip/gic-v4.1: Ensure mutual exclusion betwen invalidations on the same RD irqchip/gic-v4.1: Advertise support v4.1 to KVM irqchip/gic-v4.1: Map the ITS SGIR register page irqchip/gic-v4.1: Plumb skeletal VSGI irqchip irqchip/gic-v4.1: Add initial SGI configuration irqchip/gic-v4.1: Plumb mask/unmask SGI callbacks irqchip/gic-v4.1: Plumb get/set_irqchip_state SGI callbacks irqchip/gic-v4.1: Plumb set_vcpu_affinity SGI callbacks irqchip/gic-v4.1: Move doorbell management to the GICv4 abstraction layer irqchip/gic-v4.1: Add VSGI allocation/teardown irqchip/gic-v4.1: Add VSGI property setup irqchip/gic-v4.1: Eagerly vmap vPEs KVM: arm64: GICv4.1: Let doorbells be auto-enabled KVM: arm64: GICv4.1: Add direct injection capability to SGI registers KVM: arm64: GICv4.1: Allow SGIs to switch between HW and SW interrupts KVM: arm64: GICv4.1: Plumb SGI implementation selection in the distributor KVM: arm64: GICv4.1: Reload VLPI configuration on distributor enable/disable KVM: arm64: GICv4.1: Allow non-trapping WFI when using HW SGIs KVM: arm64: GICv4.1: Expose HW-based SGIs in debugfs Zenghui Yu (1): irqchip/gic-v4.1: Wait for completion of redistributor's INVALL operation arch/arm/include/asm/kvm_host.h | 1 + arch/arm64/include/asm/kvm_emulate.h | 3 +- arch/arm64/include/asm/kvm_host.h | 1 + drivers/irqchip/irq-gic-v3-its.c | 385 +++++++++++++++++++++++-- drivers/irqchip/irq-gic-v3.c | 13 +- drivers/irqchip/irq-gic-v4.c | 134 ++++++++- include/kvm/arm_vgic.h | 4 + include/linux/irqchip/arm-gic-common.h | 2 + include/linux/irqchip/arm-gic-v3.h | 20 +- include/linux/irqchip/arm-gic-v4.h | 25 +- virt/kvm/arm/arm.c | 8 + virt/kvm/arm/vgic/vgic-debug.c | 14 +- virt/kvm/arm/vgic/vgic-mmio-v3.c | 68 ++++- virt/kvm/arm/vgic/vgic-mmio.c | 88 +++++- virt/kvm/arm/vgic/vgic-v3.c | 6 +- virt/kvm/arm/vgic/vgic-v4.c | 137 +++++++-- virt/kvm/arm/vgic/vgic.h | 1 + 17 files changed, 844 insertions(+), 66 deletions(-)