linux-kernel - Re: [PATCH 00/13] Tracefs support for pKVM

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Message-ID: <20250107145439.5bd66362@gandalf.local.home>
Date: Tue, 7 Jan 2025 14:54:39 -0500
From: Steven Rostedt <rostedt@...dmis.org>
To: Vincent Donnefort <vdonnefort@...gle.com>
Cc: mhiramat@...nel.org, linux-trace-kernel@...r.kernel.org, maz@...nel.org,
 oliver.upton@...ux.dev, kvmarm@...ts.linux.dev, will@...nel.org,
 qperret@...gle.com, kernel-team@...roid.com, linux-kernel@...r.kernel.org
Subject: Re: [PATCH 00/13] Tracefs support for pKVM


Hi Vincent,

Are you still working on this series? I was expecting an update.

-- Steve


On Wed, 11 Sep 2024 10:30:16 +0100
Vincent Donnefort <vdonnefort@...gle.com> 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]