linux-kernel - Re: [PATCH v2 1/3] ACPICA: ACPI 6.4: MADT: add Multiprocessor Wakeup Mailbox Structure

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Message-ID: <4fb6aefe-5873-b04e-dc0b-12dd0c52f411@linux.intel.com>
Date:   Fri, 23 Apr 2021 09:44:20 -0700
From:   "Kuppuswamy, Sathyanarayanan" 
        <sathyanarayanan.kuppuswamy@...ux.intel.com>
To:     "Rafael J. Wysocki" <rafael@...nel.org>,
        Erik Kaneda <erik.kaneda@...el.com>
Cc:     Rafael J Wysocki <rjw@...ysocki.net>,
        Thomas Gleixner <tglx@...utronix.de>,
        Ingo Molnar <mingo@...hat.com>,
        "H . Peter Anvin" <hpa@...or.com>,
        Peter Zijlstra <peterz@...radead.org>,
        Len Brown <lenb@...nel.org>,
        Robert Moore <robert.moore@...el.com>,
        ACPI Devel Maling List <linux-acpi@...r.kernel.org>,
        "open list:ACPI COMPONENT ARCHITECTURE (ACPICA)" <devel@...ica.org>,
        Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
        the arch/x86 maintainers <x86@...nel.org>
Subject: Re: [PATCH v2 1/3] ACPICA: ACPI 6.4: MADT: add Multiprocessor Wakeup
 Mailbox Structure



On 4/23/21 5:33 AM, Rafael J. Wysocki wrote:
> On Thu, Apr 22, 2021 at 11:47 PM Kuppuswamy Sathyanarayanan
> <sathyanarayanan.kuppuswamy@...ux.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@...ux.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.

Yes. Since I had dependent patches, Erik sent it to me for
submission.

> 
>> ---
>>   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
>>

-- 
Sathyanarayanan Kuppuswamy
Linux Kernel Developer