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[35.187.0.65]) by smtp.gmail.com with ESMTPSA id 5b1f17b1804b1-436e2dc0bb7sm11425e9.16.2025.01.07.13.46.47 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Tue, 07 Jan 2025 13:46:48 -0800 (PST) Date: Tue, 7 Jan 2025 21:46:44 +0000 From: Vincent Donnefort To: Steven Rostedt Cc: mhiramat@kernel.org, linux-trace-kernel@vger.kernel.org, maz@kernel.org, oliver.upton@linux.dev, kvmarm@lists.linux.dev, will@kernel.org, qperret@google.com, kernel-team@android.com, linux-kernel@vger.kernel.org Subject: Re: [PATCH 00/13] Tracefs support for pKVM Message-ID: References: <20240911093029.3279154-1-vdonnefort@google.com> <20250107145439.5bd66362@gandalf.local.home> Precedence: bulk X-Mailing-List: linux-trace-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20250107145439.5bd66362@gandalf.local.home> On Tue, Jan 07, 2025 at 02:54:39PM -0500, Steven Rostedt wrote: > > Hi Vincent, > > Are you still working on this series? I was expecting an update. Yes I am! I had actually a new version ready just before christmas but I thought I'd better wait for the new year before sending it so it does not get lost in your mailbox :) Hopefully I'll send it this week! > > -- Steve > > > On Wed, 11 Sep 2024 10:30:16 +0100 > 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 introduces a method to create events and to generate them > > from the hypervisor (hyp_enter/hyp_exit given as an example) as well as > > a Tracefs user-space interface to read them. > > > > A presentation was given on this matter during the tracing summit in > > 2022. [1]