linux-kernel - Re: [PATCH v5 02/10] x86/acpi: Move acpi_wakeup

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Message-ID: <20250630225022.GB3072@ranerica-svr.sc.intel.com>
Date: Mon, 30 Jun 2025 15:50:22 -0700
From: Ricardo Neri <ricardo.neri-calderon@...ux.intel.com>
To: "Rafael J. Wysocki" <rafael@...nel.org>
Cc: x86@...nel.org, Krzysztof Kozlowski <krzk+dt@...nel.org>,
	Conor Dooley <conor+dt@...nel.org>, Rob Herring <robh@...nel.org>,
	"K. Y. Srinivasan" <kys@...rosoft.com>,
	Haiyang Zhang <haiyangz@...rosoft.com>,
	Wei Liu <wei.liu@...nel.org>, Dexuan Cui <decui@...rosoft.com>,
	Michael Kelley <mhklinux@...look.com>,
	Saurabh Sengar <ssengar@...ux.microsoft.com>,
	Chris Oo <cho@...rosoft.com>,
	"Kirill A. Shutemov" <kirill.shutemov@...ux.intel.com>,
	linux-hyperv@...r.kernel.org, devicetree@...r.kernel.org,
	linux-acpi@...r.kernel.org, linux-kernel@...r.kernel.org,
	Ricardo Neri <ricardo.neri@...el.com>,
	Yunhong Jiang <yunhong.jiang@...ux.intel.com>
Subject: Re: [PATCH v5 02/10] x86/acpi: Move acpi_wakeup_cpu() and helpers to
 smpwakeup.c

On Mon, Jun 30, 2025 at 08:58:56PM +0200, Rafael J. Wysocki wrote:
> On Sat, Jun 28, 2025 at 5:35 AM Ricardo Neri
> <ricardo.neri-calderon@...ux.intel.com> wrote:
> >
> > The bootstrap processor uses acpi_wakeup_cpu() to indicate to firmware that
> > it wants to boot a secondary CPU using a mailbox as described in the
> > Multiprocessor Wakeup Structure of the ACPI specification.
> >
> > The platform firmware may implement the mailbox as described in the ACPI
> > specification but enumerate it using a DeviceTree graph. An example of
> > this is OpenHCL paravisor.
> >
> > Move the code used to setup and use the mailbox for CPU wakeup out of the
> > ACPI directory into a new smpwakeup.c file that both ACPI and DeviceTree
> > can use.
> 
> IMV "that can be used by both ACPI and DeviceTree" would sound better.

I have taken your rewording suggestion.

> 
> > No functional changes are intended.
> >
> > Co-developed-by: Yunhong Jiang <yunhong.jiang@...ux.intel.com>
> > Signed-off-by: Yunhong Jiang <yunhong.jiang@...ux.intel.com>
> > Signed-off-by: Ricardo Neri <ricardo.neri-calderon@...ux.intel.com>
> 
> With the above addressed
> 
> Acked-by: Rafael J. Wysocki <rafael.j.wysocki@...el.com>

Thank you!