linux-kernel - Re: [PATCH net-next v9 3/6] arch: x86: add IPC mailbox accessor function and add SoC register access

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Message-ID: <48885074-b590-41e6-9794-49ec12713cce@redhat.com>
Date: Tue, 4 Mar 2025 10:54:34 +0100
From: Paolo Abeni <pabeni@...hat.com>
To: Hans de Goede <hdegoede@...hat.com>,
 Ilpo Järvinen <ilpo.jarvinen@...ux.intel.com>
Cc: x86@...nel.org, linux-kernel@...r.kernel.org, netdev@...r.kernel.org,
 platform-driver-x86@...r.kernel.org,
 linux-stm32@...md-mailman.stormreply.com,
 linux-arm-kernel@...ts.infradead.org,
 Choong Yong Liang <yong.liang.choong@...ux.intel.com>,
 Simon Horman <horms@...nel.org>, Jose Abreu <joabreu@...opsys.com>,
 Jose Abreu <Jose.Abreu@...opsys.com>,
 David E Box <david.e.box@...ux.intel.com>,
 Thomas Gleixner <tglx@...utronix.de>,
 Rajneesh Bhardwaj <irenic.rajneesh@...il.com>, Ingo Molnar
 <mingo@...hat.com>, Borislav Petkov <bp@...en8.de>,
 Dave Hansen <dave.hansen@...ux.intel.com>, "H . Peter Anvin"
 <hpa@...or.com>, David E Box <david.e.box@...el.com>,
 Andrew Lunn <andrew+netdev@...n.ch>, "David S . Miller"
 <davem@...emloft.net>, Eric Dumazet <edumazet@...gle.com>,
 Jakub Kicinski <kuba@...nel.org>, Heiner Kallweit <hkallweit1@...il.com>,
 Maxime Coquelin <mcoquelin.stm32@...il.com>,
 Richard Cochran <richardcochran@...il.com>,
 Alexandre Torgue <alexandre.torgue@...s.st.com>,
 Jiawen Wu <jiawenwu@...stnetic.com>, Mengyuan Lou
 <mengyuanlou@...-swift.com>, Russell King <linux@...linux.org.uk>,
 Serge Semin <fancer.lancer@...il.com>
Subject: Re: [PATCH net-next v9 3/6] arch: x86: add IPC mailbox accessor
 function and add SoC register access

On 2/27/25 1:15 PM, Choong Yong Liang wrote:
> From: "David E. Box" <david.e.box@...ux.intel.com>
> 
> - Exports intel_pmc_ipc() for host access to the PMC IPC mailbox
> - Enables the host to access specific SoC registers through the PMC
> firmware using IPC commands. This access method is necessary for
> registers that are not available through direct Memory-Mapped I/O (MMIO),
> which is used for other accessible parts of the PMC.
> 
> Signed-off-by: David E. Box <david.e.box@...ux.intel.com>
> Signed-off-by: Chao Qin <chao.qin@...el.com>
> Signed-off-by: Choong Yong Liang <yong.liang.choong@...ux.intel.com>

Hans, Ilpo, are you ok with this patch going through the netdev/net-next
tree?

Thanks,

Paolo