linux-kernel - Re: [PATCH 1/2] docs: Add advanced extended IRQ model description

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Message-ID: <a72f2d5b-ed6d-1b47-ac99-5c99f9cf257b@loongson.cn>
Date: Mon, 13 May 2024 14:40:23 +0800
From: Tianyang Zhang <zhangtianyang@...ngson.cn>
To: Randy Dunlap <rdunlap@...radead.org>, chenhuacai@...nel.org,
 kernel@...0n.name, corbet@....net, alexs@...nel.org, siyanteng@...ngson.cn
Cc: loongarch@...ts.linux.dev, linux-doc@...r.kernel.org,
 linux-kernel@...r.kernel.org
Subject: Re: [PATCH 1/2] docs: Add advanced extended IRQ model description


在 2024/5/9 上午6:29, Randy Dunlap 写道:
> Hi--
>
> On 5/7/24 5:22 AM, Tianyang Zhang wrote:
>>  From 3C6000, Loongarch began to support advanced extended
>> interrupt mode, in which each CPU has an independent interrupt
>> vector number.This will enhance the architecture's ability
>> to support modern devices
>>
>> Signed-off-by: Tianyang Zhang <zhangtianyang@...ngson.cn>
>> ---
>>   .../arch/loongarch/irq-chip-model.rst         | 33 +++++++++++++++++
>>   .../zh_CN/arch/loongarch/irq-chip-model.rst   | 37 +++++++++++++++++--
>>   2 files changed, 67 insertions(+), 3 deletions(-)
>>
>> diff --git a/Documentation/arch/loongarch/irq-chip-model.rst b/Documentation/arch/loongarch/irq-chip-model.rst
>> index 7988f4192363..79228741d1b9 100644
>> --- a/Documentation/arch/loongarch/irq-chip-model.rst
>> +++ b/Documentation/arch/loongarch/irq-chip-model.rst
>> @@ -85,6 +85,39 @@ to CPUINTC directly::
>>       | Devices |
>>       +---------+
>>   
>> +Advanced Extended IRQ model
>> +=======================
> The === underline line needs to be at least as long as the line above it.
I will repair this problem
>> +
>> +In this model, IPI (Inter-Processor Interrupt) and CPU Local Timer interrupt go
>> +to CPUINTC directly, CPU UARTS interrupts go to LIOINTC, MSI interrupts go to AVEC,
>> +and then go to CPUINTC, Other devices interrupts go to PCH-PIC/PCH-LPC and gathered
>                    CPUINTC.
Thank you for the reminder
>> +by EIOINTC, and then go to CPUINTC directly::
>> +
>> + +-----+     +--------------------------+     +-------+
>> + | IPI | --> |           CPUINTC        | <-- | Timer |
>> + +-----+     +--------------------------+     +-------+
>> +              ^        ^             ^
>> +              |        |             |
>> +      +--------+  +---------+ +---------+     +-------+
>> +      | AVEC   |  | EIOINTC | | LIOINTC | <-- | UARTs |
>> +      +--------+  +---------+ +---------+     +-------+
>> +           ^            ^
>> +           |            |
>> +         +---------+  +---------+
>> +         |   MSI   |  | PCH-PIC |
>> +         +---------+  +---------+
>> +            ^          ^       ^
>> +            |          |       |
>> +    +---------+ +---------+ +---------+
>> +    | Devices | | PCH-LPC | | Devices |
>> +    +---------+ +---------+ +---------+
>> +                     ^
>> +                     |
>> +                +---------+
>> +                | Devices |
>> +                +---------+
>> +
>> +
>>   ACPI-related definitions
>>   ========================
>>   
> thanks.