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Thu, 24 Jul 2025 21:09:27 -0700 (PDT) Date: Thu, 24 Jul 2025 21:09:23 -0700 From: Richard Cochran To: David Arinzon Cc: David Miller , Jakub Kicinski , Eric Dumazet , Paolo Abeni , "Woodhouse, David" , Andrew Lunn , Miroslav Lichvar , David Woodhouse , Thomas Gleixner , netdev@vger.kernel.org, "Machulsky, Zorik" , "Matushevsky, Alexander" , Saeed Bshara , "Wilson, Matt" , "Liguori, Anthony" , "Bshara, Nafea" , "Schmeilin, Evgeny" , "Belgazal, Netanel" , "Saidi, Ali" , "Herrenschmidt, Benjamin" , "Kiyanovski, Arthur" , "Dagan, Noam" , "Bernstein, Amit" , "Ostrovsky, Evgeny" , "Tabachnik, Ofir" , Julien Ridoux , Josh Levinson Subject: Re: [RFC PATCH net-next] ptp: Introduce PTP_SYS_OFFSET_EXTENDED_TRUSTED ioctl Message-ID: References: <20250724115657.150-1-darinzon@amazon.com> Precedence: bulk X-Mailing-List: netdev@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: <20250724115657.150-1-darinzon@amazon.com> On Thu, Jul 24, 2025 at 02:56:56PM +0300, David Arinzon wrote: > The first objective focuses on the use case where the PHC device > is fully managed. The ENA driver, for example, exposes a PHC > device, whose synchronization status and quality is maintained > without any user-space application. This new ioctl reports on the > clock accuracy and status of the PHC device to user-space > applications, where ptp4l and similar are not available. This seems pretty rare. I can't think of any other hardware that makes claims about synchronization quality. So this ioctl would be just for one device. Thanks, Richard