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 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 smtp.lore.kernel.org (Postfix) with ESMTPS id A5C03CC6B33 for ; Thu, 15 Oct 2026 13:31:08 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20210309; h=Sender:List-Subscribe:List-Help :List-Post:List-Archive:List-Unsubscribe:List-Id:Content-Type:MIME-Version: References:In-Reply-To:Subject:Cc:To:From:Message-ID:Date:Reply-To: Content-Transfer-Encoding:Content-ID:Content-Description:Resent-Date: Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID:List-Owner; bh=aieewkiVnVuP9Gv4tnFbYL65Nv/XO1TXk9gy+wXJC4Y=; b=JDeOaTU0SYCJjHs1m+JrIMeRug bmqqC5QRFWoHLyNl6NIQf3MSs7Xd6ogO/dSGYx+bEJ0BpftOL7MI2q1o5m9uYHP58+MpSZerC8BXM dflQMKR/mkqlINuuoGwH4F+qtTUHs5c2qNGnEdFid+uOJ2BVE/k9csUqI1IQtuXH1XBiRsKCGgRAk h07K0VHuzamiNjFkmwHMC2JrOf47C4h5eAxa4nIDLJCK41AN8D2iWRx+C/fxTtKFob6aJfb1xN8AF 6WASjYLgF41pRV1NK2yjqonrEPq9ttnmH594CZran51sDYxYlxoKFPOSiqXJ0yPID8gVyZlYJRfwT iTjy7hkQ==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.99.1 #2 (Red Hat Linux)) id 1xHLXv-00000000GHA-3tuX; Thu, 15 Oct 2026 13:30:59 +0000 Received: from tor.source.kernel.org ([2600:3c04:e001:324:0:1991:8:25]) by bombadil.infradead.org with esmtps (Exim 4.99.1 #2 (Red Hat Linux)) id 1xHLXs-00000000GGr-0jsA for linux-arm-kernel@lists.infradead.org; Thu, 15 Oct 2026 13:30:56 +0000 Received: from smtp.kernel.org (quasi.space.kernel.org [100.103.45.18]) by tor.source.kernel.org (Postfix) with ESMTP id 9E581601EF; Thu, 15 Oct 2026 13:30:55 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id 564521F000C4; Thu, 15 Oct 2026 13:30:55 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=kernel.org; s=k20260515; t=1792071055; bh=aieewkiVnVuP9Gv4tnFbYL65Nv/XO1TXk9gy+wXJC4Y=; h=Date:From:To:Cc:Subject:In-Reply-To:References; b=Ol5vRMnHMUpLDISLVFg5BEdpUSxJjrLkJkYSiePoPb7ofgNa1DtfJqxDHMcnFUtpm UU4ZmN8IsflTOkK46Jy8692973WILwjvmZBJFB1pR5c8MqFWMqhcT52IKh4pvXX3b9 /WVebvEpJTHzlw2C6AJYFDdVzvqGbSGX04uDOP34W87QDvB41W8vlAGTBd8Gurn676 I+xWw287r7fQSTI5Rz5CIdZ2NiDMuCXLncbzQVuB2vqeR3wuK0XU3SaSIntO5RyGFa 7D2uEjaH6QE5CKptkGLHub7GuaMMDsvf/yhxXvaGXL+bbNVtqQhUFUgACUQeTPQWIO p2oP2JHAVwuaQ== Received: from sofa.misterjones.org ([185.219.108.64] helo=goblin-girl.misterjones.org) by disco-boy.misterjones.org with esmtpsa (TLS1.3) tls TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384 (Exim 4.98.2) (envelope-from ) id 1xHLXp-00000003K9v-18ma; Thu, 15 Oct 2026 13:30:53 +0000 Date: Thu, 15 Oct 2026 14:30:52 +0100 Message-ID: <86jynj146r.wl-maz@kernel.org> From: Marc Zyngier To: Fuad Tabba Cc: Oliver Upton , Joey Gouly , Suzuki K Poulose , Zenghui Yu , Steffen Eiden , kvmarm@lists.linux.dev, linux-arm-kernel@lists.infradead.org, kvm@vger.kernel.org, Fuad Tabba Subject: Re: [PATCH 0/7] KVM: arm64: Fix cross-CPU vcpu pausing In-Reply-To: <20261015125712.2650518-1-fuad.tabba@linux.dev> References: <20261015100539.1011760-1-maz@kernel.org> <20261015125712.2650518-1-fuad.tabba@linux.dev> User-Agent: Wanderlust/2.15.9 (Almost Unreal) SEMI-EPG/1.14.7 (Harue) FLIM-LB/1.14.9 (=?UTF-8?B?R29qxY0=?=) APEL-LB/10.8 EasyPG/1.0.0 Emacs/30.1 (aarch64-unknown-linux-gnu) MULE/6.0 (HANACHIRUSATO) MIME-Version: 1.0 (generated by SEMI-EPG 1.14.7 - "Harue") Content-Type: text/plain; charset=US-ASCII X-SA-Exim-Connect-IP: 185.219.108.64 X-SA-Exim-Rcpt-To: fuad.tabba@linux.dev, oupton@kernel.org, joey.gouly@arm.com, suzuki.poulose@arm.com, yuzenghui@huawei.com, seiden@linux.ibm.com, kvmarm@lists.linux.dev, linux-arm-kernel@lists.infradead.org, kvm@vger.kernel.org, tabba@google.com X-SA-Exim-Mail-From: maz@kernel.org X-SA-Exim-Scanned: No (on disco-boy.misterjones.org); SAEximRunCond expanded to false X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org On Thu, 15 Oct 2026 13:57:12 +0100, Fuad Tabba wrote: > > Hi Marc, > > On Thu, 15 Oct 2026 11:05:32 +0100, Marc Zyngier wrote: > [...] > > This series addresses these defects, and builds on top of it to: > > > > - add pausing to a single vcpu in addition to the full VM pausing > > > > - convert LPI disabling and the MOVALL command to vcpu pausing > > > > Patches on top of -rc6, most of them being Cc stable without any > > qualification (this has been broken for as long as I can remember). > > I'll send a couple of nits on patches 2 and 5 as replies to those > patches. Thanks, I'll tidy that up as I apply them. > > For the series: > Reviewed-by: Fuad Tabba > > Tested on QEMU on top of -rc6: npVM and pVM boots in pKVM, npVM boots > with nVHE and VHE hosts, and vgic_irq and vgic_lpi_stress in all three > and with kvm-arm.mode=nested. My reproducer has vcpu 0 clear vcpu 1's > EnableLPIs while the LPI is in vcpu 1's LR: on -rc6 the LPI is still > pending on vcpu 1 afterwards, and with the series it isn't. With my > vgic-its v2 [1] on top, my MOVALL selftest and my shared LPI and DISCARD > reproducers pass, including with PROVE_LOCKING and with debug hooks > that force the DISCARD race. > > Tested-by: Fuad Tabba Great, thanks again. > > v2 of "Fix LPI double mapping and DISCARD" [1] applies on top of this > series as it is. Would you take it as it is, or would you like me to > respin it? I can stash it on top as is. Looks like the first set of 7.4 fixes is going to be pretty vgic-heavy anyway. Cheers, M. -- Without deviation from the norm, progress is not possible.