linux-kernel - Re: [PATCH net-next V2 1/3] ptp: Add ioctl commands to expose raw cycle counter values

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [day] [month] [year] [list]

Message-ID: <ca8b550b-a284-4afc-9a50-09e42b86c774@redhat.com>
Date: Tue, 19 Aug 2025 10:43:00 +0200
From: Paolo Abeni <pabeni@...hat.com>
To: Richard Cochran <richardcochran@...il.com>
Cc: Saeed Mahameed <saeedm@...dia.com>, Leon Romanovsky <leon@...nel.org>,
 Mark Bloch <mbloch@...dia.com>, netdev@...r.kernel.org,
 linux-rdma@...r.kernel.org, linux-kernel@...r.kernel.org,
 Gal Pressman <gal@...dia.com>, Thomas Gleixner <tglx@...utronix.de>,
 Carolina Jubran <cjubran@...dia.com>, Jakub Kicinski <kuba@...nel.org>,
 Vladimir Oltean <vladimir.oltean@....com>,
 Dragos Tatulea <dtatulea@...dia.com>, "David S. Miller"
 <davem@...emloft.net>, Eric Dumazet <edumazet@...gle.com>,
 Tariq Toukan <tariqt@...dia.com>, Andrew Lunn <andrew+netdev@...n.ch>
Subject: Re: [PATCH net-next V2 1/3] ptp: Add ioctl commands to expose raw
 cycle counter values

On 8/12/25 4:17 PM, Tariq Toukan wrote:
> From: Carolina Jubran <cjubran@...dia.com>
> 
> Introduce two new ioctl commands, PTP_SYS_OFFSET_PRECISE_CYCLES and
> PTP_SYS_OFFSET_EXTENDED_CYCLES, to allow user space to access the
> raw free-running cycle counter from PTP devices.
> 
> These ioctls are variants of the existing PRECISE and EXTENDED
> offset queries, but instead of returning device time in realtime,
> they return the raw cycle counter value.
> 
> Signed-off-by: Carolina Jubran <cjubran@...dia.com>
> Reviewed-by: Dragos Tatulea <dtatulea@...dia.com>
> Signed-off-by: Tariq Toukan <tariqt@...dia.com>

Hi Richard,

can we have a formal ack here?

Thanks,

Paolo