linux-kernel - [PATCH net-next 0/3] netdevsim: add support for PHY devices

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Message-ID: <20250702082806.706973-1-maxime.chevallier@bootlin.com>
Date: Wed,  2 Jul 2025 10:28:02 +0200
From: Maxime Chevallier <maxime.chevallier@...tlin.com>
To: davem@...emloft.net
Cc: Maxime Chevallier <maxime.chevallier@...tlin.com>,
	netdev@...r.kernel.org,
	linux-kernel@...r.kernel.org,
	thomas.petazzoni@...tlin.com,
	Andrew Lunn <andrew@...n.ch>,
	Jakub Kicinski <kuba@...nel.org>,
	Eric Dumazet <edumazet@...gle.com>,
	Paolo Abeni <pabeni@...hat.com>,
	Russell King <linux@...linux.org.uk>,
	Florian Fainelli <f.fainelli@...il.com>,
	Heiner Kallweit <hkallweit1@...il.com>,
	Vladimir Oltean <vladimir.oltean@....com>,
	Köry Maincent <kory.maincent@...tlin.com>,
	Oleksij Rempel <o.rempel@...gutronix.de>,
	Simon Horman <horms@...nel.org>,
	Shuah Khan <shuah@...nel.org>,
	linux-kselftest@...r.kernel.org
Subject: [PATCH net-next 0/3] netdevsim: add support for PHY devices

There exist numerous ethtool commands that gets their information from
an interface's PHY. This series allows creating virtual PHY devices
attached to netdevsim, so that we can start testing these commands.

This first series adds a minimal support. The PHY that we add are only
capable of saying if the link is up or down, based on a debugfs file.

When accepted, this interface can be extended to allow testing further
commands, and in greater details.

This series also add some selftests for the "ethtool --show-phys"
command. This is a first step towards having better testability for the
ethtool netlink PHY commands, but this could also potentially be a
stepping stone for some basic phylib tests ?

Thanks,

Maxime

Maxime Chevallier (3):
  net: netdevsim: Add PHY support in netdevsim
  selftests: ethtool: Drop the unused old_netdevs variable
  selftests: ethtool: Introduce ethernet PHY selftests on netdevsim

 drivers/net/netdevsim/Makefile                |   4 +
 drivers/net/netdevsim/dev.c                   |   2 +
 drivers/net/netdevsim/netdev.c                |   3 +
 drivers/net/netdevsim/netdevsim.h             |  14 +
 drivers/net/netdevsim/phy.c                   | 387 ++++++++++++++++++
 .../selftests/drivers/net/netdevsim/config    |   1 +
 .../drivers/net/netdevsim/ethtool-common.sh   |  19 +-
 .../drivers/net/netdevsim/ethtool-phy.sh      |  64 +++
 8 files changed, 491 insertions(+), 3 deletions(-)
 create mode 100644 drivers/net/netdevsim/phy.c
 create mode 100755 tools/testing/selftests/drivers/net/netdevsim/ethtool-phy.sh

-- 
2.49.0