linux-kernel - Re: [PATCH v7 1/9] x86/acpi: Add functions to setup and access the wakeup mailbox

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Message-ID: <20251126022010.GA27627@ranerica-svr.sc.intel.com>
Date: Tue, 25 Nov 2025 18:20:10 -0800
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" <kas@...nel.org>,
	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>
Subject: Re: [PATCH v7 1/9] x86/acpi: Add functions to setup and access the
 wakeup mailbox

On Mon, Nov 24, 2025 at 05:01:11PM +0100, Rafael J. Wysocki wrote:
> On Mon, Nov 17, 2025 at 6:04 PM Ricardo Neri
> <ricardo.neri-calderon@...ux.intel.com> wrote:
> >
> > Systems that describe hardware using DeviceTree graphs may enumerate and
> > implement the wakeup mailbox as defined in the ACPI specification but do
> > not otherwise depend on ACPI. Expose functions to setup and access the
> > location of the wakeup mailbox from outside ACPI code.
> >
> > The function acpi_setup_mp_wakeup_mailbox() stores the physical address of
> > the mailbox and updates the wakeup_secondary_cpu_64() APIC callback.
> >
> > The function acpi_madt_multiproc_wakeup_mailbox() returns a pointer to the
> > mailbox.
> >
> > Signed-off-by: Ricardo Neri <ricardo.neri-calderon@...ux.intel.com>
> 
> Acked-by: Rafael J. Wysocki (Intel) <rafael@...nel.org>

Thanks Rafael!