在 3/31/25 2:41 PM, Tianyang Zhang 写道:
Introduce the redirect interrupt controllers.When the redirect interrupt
controller is enabled, the routing target of MSI interrupts is no longer a
specific CPU and vector number, but a specific redirect entry. The actual
CPU and vector number used are described by the redirect entry.
Signed-off-by: Tianyang Zhang <zhangtianyang@xxxxxxxxxxx>
---
.../arch/loongarch/irq-chip-model.rst | 38 +++++++++++++++++++
.../zh_CN/arch/loongarch/irq-chip-model.rst | 37 ++++++++++++++++++
2 files changed, 75 insertions(+)
diff --git a/Documentation/arch/loongarch/irq-chip-model.rst b/Documentation/arch/loongarch/irq-chip-model.rst
index a7ecce11e445..84fafb86ec17 100644
--- a/Documentation/arch/loongarch/irq-chip-model.rst
+++ b/Documentation/arch/loongarch/irq-chip-model.rst
@@ -181,6 +181,44 @@ go to PCH-PIC/PCH-LPC and gathered by EIOINTC, and then go to CPUINTC directly::
| Devices |
+---------+
+Advanced Extended IRQ model (with redirection)
+===============
Did you do the build test?
+
+In this model, IPI (Inter-Processor Interrupt) and CPU Local Timer interrupt go
+to CPUINTC directly, CPU UARTS interrupts go to LIOINTC, PCH-MSI interrupts go
+to REDIRECT for remapping it to AVEC, and then go to CPUINTC directly, while all
+other devices interrupts go to PCH-PIC/PCH-LPC and gathered by EIOINTC, and then
+go to CPUINTC directly::
+
+ +-----+ +-----------------------+ +-------+
+ | IPI | --> | CPUINTC | <-- | Timer |
+ +-----+ +-----------------------+ +-------+
+ ^ ^ ^
+ | | |
+ +---------+ +----------+ +---------+ +-------+
+ | EIOINTC | | AVECINTC | | LIOINTC | <-- | UARTs |
+ +---------+ +----------+ +---------+ +-------+
+ ^ ^
+ | |
+ | +----------+
+ | | REDIRECT |
+ | +----------+
+ | ^
+ | |
+ +---------+ +---------+
+ | PCH-PIC | | PCH-MSI |
+ +---------+ +---------+
+ ^ ^ ^
+ | | |
+ +---------+ +---------+ +---------+
+ | Devices | | PCH-LPC | | Devices |
+ +---------+ +---------+ +---------+
+ ^
+ |
+ +---------+
+ | Devices |
+ +---------+
+
ACPI-related definitions
========================
diff --git a/Documentation/translations/zh_CN/arch/loongarch/irq-chip-model.rst b/Documentation/translations/zh_CN/arch/loongarch/irq-chip-model.rst
index d4ff80de47b6..5d82cba07482 100644
--- a/Documentation/translations/zh_CN/arch/loongarch/irq-chip-model.rst
+++ b/Documentation/translations/zh_CN/arch/loongarch/irq-chip-model.rst
@@ -174,6 +174,43 @@ CPU串口（UARTs）中断发送到LIOINTC，PCH-MSI中断发送到AVECINTC，
| Devices |
+---------+
+高级扩展IRQ模型 (带重定向)
+===============
ditto
Thanks,
Yanteng
