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 8E191E9A053 for ; Thu, 19 Feb 2026 18:02:31 +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-Transfer-Encoding: Content-Type:MIME-Version:References:In-Reply-To:Message-ID:Subject:Cc:To: From:Date:Reply-To:Content-ID:Content-Description:Resent-Date:Resent-From: Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID:List-Owner; bh=nrmuFJtx/xFV37s1HrUTVNNYNqMAOEdHaltFHcO5V3g=; b=2nlzIfU7m1NuVeSMv9Vx4dObQF gXw/5AuyFDbzQMnOVmqCkTVY6c+8gd7e9WiCF1MCAHI3z1f6LH6Zt5+LWoT6xTvRHPKfC4VqveDsz Bpor32B0vYgp5HVc6SGqPwqe1pGAQZBnRBQ6JsuvQVwioDIeMK9/gK0qhWcYCROUBuOvnKOfJ+OdE CSkqm2l2NaJcsBgSV6ayXfKTFQLRT/h8ce9HYMljKbg9HSrZr/H89X2dXD89UrCghd8SOhK41Waj3 YdiRpjcd6TDgNP/JRcmSH8X3DMBMrgtlqFwIcrAboIr0UY9u62VOK28xtAZOI3ZCPpELVpzv2G9FY Akw/h1Kg==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.98.2 #2 (Red Hat Linux)) id 1vt8M3-0000000BkKc-42O0; Thu, 19 Feb 2026 18:02:23 +0000 Received: from smtprelay0010.hostedemail.com ([216.40.44.10] helo=relay.hostedemail.com) by bombadil.infradead.org with esmtps (Exim 4.98.2 #2 (Red Hat Linux)) id 1vt8M1-0000000BkKH-17Wd for linux-arm-kernel@lists.infradead.org; Thu, 19 Feb 2026 18:02:22 +0000 Received: from omf06.hostedemail.com (a10.router.float.18 [10.200.18.1]) by unirelay04.hostedemail.com (Postfix) with ESMTP id B2B8A1A05C3; Thu, 19 Feb 2026 18:02:17 +0000 (UTC) Received: from [HIDDEN] (Authenticated sender: rostedt@goodmis.org) by omf06.hostedemail.com (Postfix) with ESMTPA id 56CE52000E; Thu, 19 Feb 2026 18:02:14 +0000 (UTC) Date: Thu, 19 Feb 2026 13:02:20 -0500 From: Steven Rostedt To: Vincent Donnefort Cc: mhiramat@kernel.org, mathieu.desnoyers@efficios.com, linux-trace-kernel@vger.kernel.org, maz@kernel.org, oliver.upton@linux.dev, joey.gouly@arm.com, suzuki.poulose@arm.com, yuzenghui@huawei.com, kvmarm@lists.linux.dev, linux-arm-kernel@lists.infradead.org, jstultz@google.com, qperret@google.com, will@kernel.org, aneesh.kumar@kernel.org, kernel-team@android.com, linux-kernel@vger.kernel.org Subject: Re: [PATCH v12 00/30] Tracefs support for pKVM Message-ID: <20260219130220.063c8db3@gandalf.local.home> In-Reply-To: <20260219150307.14538-1-vdonnefort@google.com> References: <20260219150307.14538-1-vdonnefort@google.com> X-Mailer: Claws Mail 3.20.0git84 (GTK+ 2.24.33; x86_64-pc-linux-gnu) MIME-Version: 1.0 Content-Type: text/plain; charset=US-ASCII Content-Transfer-Encoding: 7bit X-Stat-Signature: 3in7iq53re3wcp4bjfb45ehj6p83i6w8 X-Rspamd-Server: rspamout03 X-Rspamd-Queue-Id: 56CE52000E X-Session-Marker: 726F737465647440676F6F646D69732E6F7267 X-Session-ID: U2FsdGVkX189EHO2cj0/ER1Y3s2xm8l7FxzngbV/18k= X-HE-Tag: 1771524134-16267 X-HE-Meta: U2FsdGVkX18KsOW634c556Ay13vHARR3KG4iY9bpKgjeimF0kt32KKjae7aXrRnSMJvjA24rkCK1I2KRg6sbjxJ4TuWrR61mVJD2cJ0Md77TIqpMR46+fiK1TW7LwmkXwHbJgeYwTaQLsvKdGP64eU9XY5K6aTGQuiytjdf7LgNTVVhPHrEszyGEi+0EsoLYqoydPvHsWxetb78EJZV+8+Fb8NZAqef5y3BfvnJW4bxA/sBaUm5auwcuTGYwiowNUjGGHA40xyhyOyNL8X/ne61begI9OBko2AupzQZjhIq7xw99cqZ4nRkajdMKJWGMsz7fTOODChuVshdY889FxsOPUcjSK03I X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20260219_100221_369479_2412C76A X-CRM114-Status: GOOD ( 17.73 ) 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, 19 Feb 2026 15:02:37 +0000 Vincent Donnefort wrote: > The growing set of features supported by the hypervisor in protected > mode necessitates debugging and profiling tools. Tracefs is the > ideal candidate for this task: > > * It is simple to use and to script. > > * It is supported by various tools, from the trace-cmd CLI to the > Android web-based perfetto. > > * The ring-buffer, where are stored trace events consists of linked > pages, making it an ideal structure for sharing between kernel and > hypervisor. > > This series first introduces a new generic way of creating remote events and > remote buffers. Then it adds support to the pKVM hypervisor. > So I finished my review of all the tracing patches, but I just realized that there's likely going to be some major conflicts with changes in the tracing tree that's going to happen against this series. To solve that, after -rc2 comes out, I'll apply the tracing portion of this series to a branch in my tree directly on top of -rc2 and I will then use that to base my changes for the next merge window. Then the arm/kvm folks could start with that branch and add the arm/KVM portion of this series on top of it. This will prevent major merge conflicts in linux-next. Does that sound OK? -- Steve