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From:   "Rafael J. Wysocki" <rafael@kernel.org>
Date:   Fri, 23 Apr 2021 14:33:53 +0200
Message-ID: <CAJZ5v0itaKL58ieMB6ER47GVns7Ukvd_7VNBAxkktWB5cDv-SQ@mail.gmail.com>
Subject: Re: [PATCH v2 1/3] ACPICA: ACPI 6.4: MADT: add Multiprocessor Wakeup
 Mailbox Structure
To:     Kuppuswamy Sathyanarayanan 
        <sathyanarayanan.kuppuswamy@linux.intel.com>,
        Erik Kaneda <erik.kaneda@intel.com>
Cc:     Rafael J Wysocki <rjw@rjwysocki.net>,
        Thomas Gleixner <tglx@linutronix.de>,
        Ingo Molnar <mingo@redhat.com>,
        "H . Peter Anvin" <hpa@zytor.com>,
        Peter Zijlstra <peterz@infradead.org>,
        Len Brown <lenb@kernel.org>,
        Robert Moore <robert.moore@intel.com>,
        ACPI Devel Maling List <linux-acpi@vger.kernel.org>,
        "open list:ACPI COMPONENT ARCHITECTURE (ACPICA)" <devel@acpica.org>,
        Linux Kernel Mailing List <linux-kernel@vger.kernel.org>,
        "the arch/x86 maintainers" <x86@kernel.org>
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On Thu, Apr 22, 2021 at 11:47 PM Kuppuswamy Sathyanarayanan
<sathyanarayanan.kuppuswamy@linux.intel.com> wrote:
>
> ACPICA commit f1ee04207a212f6c519441e7e25397649ebc4cea
>
> Add Multiprocessor Wakeup Mailbox Structure definition. It is useful
> in parsing MADT Wake table.
>
> Link: https://github.com/acpica/acpica/commit/f1ee0420
> Signed-off-by: Kuppuswamy Sathyanarayanan <sathyanarayanan.kuppuswamy@linux.intel.com>

I'm expecting to receive this patch from Erik at one point, so I'm
guessing that it's been added to this series for reference.

> ---
>  include/acpi/actbl2.h | 14 ++++++++++++++
>  1 file changed, 14 insertions(+)
>
> diff --git a/include/acpi/actbl2.h b/include/acpi/actbl2.h
> index b2362600b9ff..7dce422f6119 100644
> --- a/include/acpi/actbl2.h
> +++ b/include/acpi/actbl2.h
> @@ -733,6 +733,20 @@ struct acpi_madt_multiproc_wakeup {
>         u64 base_address;
>  };
>
> +#define ACPI_MULTIPROC_WAKEUP_MB_OS_SIZE       2032
> +#define ACPI_MULTIPROC_WAKEUP_MB_FIRMWARE_SIZE 2048
> +
> +struct acpi_madt_multiproc_wakeup_mailbox {
> +       u16 command;
> +       u16 reserved;           /* reserved - must be zero */
> +       u32 apic_id;
> +       u64 wakeup_vector;
> +       u8 reserved_os[ACPI_MULTIPROC_WAKEUP_MB_OS_SIZE];       /* reserved for OS use */
> +       u8 reserved_firmware[ACPI_MULTIPROC_WAKEUP_MB_FIRMWARE_SIZE];   /* reserved for firmware use */
> +};
> +
> +#define ACPI_MP_WAKE_COMMAND_WAKEUP    1
> +
>  /*
>   * Common flags fields for MADT subtables
>   */
> --
> 2.25.1
>