Merge tag 'irq-drivers-2025-09-29' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip

Pull irq chip driver updates from Thomas Gleixner:

 - Use the startup/shutdown callbacks for the PCI/MSI per device
   interrupt domains.

   This allows us to initialize the RISCV PLIC interrupt hierarchy
   correctly and provides a mechanism to decouple the masking and
   unmasking during run-time from the expensive PCI mask and unmask when
   the underlying MSI provider implementation allows the interrupt to be
   masked.

 - Initialize the RISCV PLIC MSI interrupt hierarchy correctly so that
   the affinity assignment works correctly by switching it over to the
   startup/shutdown scheme

 - Allow MSI providers to opt out from masking a PCI/MSI interrupt at
   the PCI device during operation when the provider can mask the
   interrupt at the underlying interrupt chip. This reduces the overhead
   in scenarios where disable_irq()/enable_irq() is utilized frequently
   by a driver.

   The PCI/MSI device level [un]masking is only required on startup and
   shutdown in this case.

 - Remove the conditional mask/unmask logic in the PCI/MSI layer as this
   is now handled unconditionally.

 - Replace the hardcoded interrupt routing in the Loongson EIOINTC
   interrupt driver to respect the firmware settings and spread them out
   to different CPU interrupt inputs so that the demultiplexing handler
   only needs to read only a single 64-bit status register instead of
   four, which significantly reduces the overhead in VMs as the status
   register access causes a VM exit.

 - Add support for the new AST2700 SCU interrupt controllers

 - Use the legacy interrupt domain setup for the Loongson PCH-LPC
   interrupt controller, which resembles the x86 legacy PIC setup and
   has the same hardcoded legacy requirements.

 - The usual set of cleanups, fixes and improvements all over the place

* tag 'irq-drivers-2025-09-29' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: (25 commits)
  irqchip/loongson-pch-lpc: Use legacy domain for PCH-LPC IRQ controller
  PCI/MSI: Remove the conditional parent [un]mask logic
  irqchip/msi-lib: Honor the MSI_FLAG_PCI_MSI_MASK_PARENT flag
  irqchip/aspeed-scu-ic: Add support for AST2700 SCU interrupt controllers
  dt-bindings: interrupt-controller: aspeed: Add AST2700 SCU IC compatibles
  dt-bindings: mfd: aspeed: Add AST2700 SCU compatibles
  irqchip/aspeed-scu-ic: Refactor driver to support variant-based initialization
  irqchip/gic-v5: Fix error handling in gicv5_its_irq_domain_alloc()
  irqchip/gic-v5: Fix loop in gicv5_its_create_itt_two_level() cleanup path
  irqchip/gic-v5: Delete a stray tab
  irqchip/sg2042-msi: Set irq type according to DT configuration
  riscv: sophgo: dts: sg2044: Change msi irq type to IRQ_TYPE_EDGE_RISING
  riscv: sophgo: dts: sg2042: Change msi irq type to IRQ_TYPE_EDGE_RISING
  irqchip/gic-v2m: Handle Multiple MSI base IRQ Alignment
  irqchip/renesas-rzg2l: Remove dev_err_probe() if error is -ENOMEM
  irqchip: Use int type to store negative error codes
  irqchip/gic-v5: Remove the redundant ITS cache invalidation
  PCI/MSI: Check MSI_FLAG_PCI_MSI_MASK_PARENT in cond_[startup|shutdown]_parent()
  irqchip/loongson-eiointc: Add multiple interrupt pin routing support
  irqchip/loongson-eiointc: Route interrupt parsed from bios table
  ...

2 files changed, 16 insertions, 0 deletions

diff --git a/include/dt-bindings/interrupt-controller/aspeed-scu-ic.h b/include/dt-bindings/interrupt-controller/aspeed-scu-ic.h
index f315d5a7f5ee..7dd04424afcc 100644
--- a/include/dt-bindings/interrupt-controller/aspeed-scu-ic.h
+++ b/include/dt-bindings/interrupt-controller/aspeed-scu-ic.h
@@ -20,4 +20,18 @@
 #define ASPEED_AST2600_SCU_IC1_LPC_RESET_LO_TO_HI	0
 #define ASPEED_AST2600_SCU_IC1_LPC_RESET_HI_TO_LO	1
 
+#define ASPEED_AST2700_SCU_IC0_PCIE_PERST_LO_TO_HI	3
+#define ASPEED_AST2700_SCU_IC0_PCIE_PERST_HI_TO_LO	2
+
+#define ASPEED_AST2700_SCU_IC1_PCIE_RCRST_LO_TO_HI	3
+#define ASPEED_AST2700_SCU_IC1_PCIE_RCRST_HI_TO_LO	2
+
+#define ASPEED_AST2700_SCU_IC2_PCIE_PERST_LO_TO_HI	3
+#define ASPEED_AST2700_SCU_IC2_PCIE_PERST_HI_TO_LO	2
+#define ASPEED_AST2700_SCU_IC2_LPC_RESET_LO_TO_HI	1
+#define ASPEED_AST2700_SCU_IC2_LPC_RESET_HI_TO_LO	0
+
+#define ASPEED_AST2700_SCU_IC3_LPC_RESET_LO_TO_HI	1
+#define ASPEED_AST2700_SCU_IC3_LPC_RESET_HI_TO_LO	0
+
 #endif /* _DT_BINDINGS_INTERRUPT_CONTROLLER_ASPEED_SCU_IC_H_ */
diff --git a/include/linux/msi.h b/include/linux/msi.h
index faac634ac230..d415dd15a0a9 100644
--- a/include/linux/msi.h
+++ b/include/linux/msi.h
@@ -564,6 +564,8 @@ enum {
 	MSI_FLAG_PARENT_PM_DEV		= (1 << 8),
 	/* Support for parent mask/unmask */
 	MSI_FLAG_PCI_MSI_MASK_PARENT	= (1 << 9),
+	/* Support for parent startup/shutdown */
+	MSI_FLAG_PCI_MSI_STARTUP_PARENT	= (1 << 10),
 
 	/* Mask for the generic functionality */
 	MSI_GENERIC_FLAGS_MASK		= GENMASK(15, 0),