genirq: Add generic msi irq domain support

Implement the basic functions for MSI interrupt support with
hierarchical interrupt domains.

[ tglx: Extracted and combined from several patches ]

Signed-off-by: Jiang Liu <jiang.liu@linux.intel.com>
Cc: Bjorn Helgaas <bhelgaas@google.com>
Cc: Grant Likely <grant.likely@linaro.org>
Cc: Marc Zyngier <marc.zyngier@arm.com>
Cc: Yingjoe Chen <yingjoe.chen@mediatek.com>
Cc: Yijing Wang <wangyijing@huawei.com>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>

1 files changed, 10 insertions, 0 deletions

diff --git a/kernel/irq/Kconfig b/kernel/irq/Kconfig
index 4f2eb2b1f23b..9a76e3beda54 100644
--- a/kernel/irq/Kconfig
+++ b/kernel/irq/Kconfig
@@ -60,6 +60,16 @@ config IRQ_DOMAIN_HIERARCHY
         bool
         select IRQ_DOMAIN
 
+# Generic MSI interrupt support
+config GENERIC_MSI_IRQ
+        bool
+
+# Generic MSI hierarchical interrupt domain support
+config GENERIC_MSI_IRQ_DOMAIN
+        bool
+        select IRQ_DOMAIN_HIERARCHY
+        select GENERIC_MSI_IRQ
+
 config HANDLE_DOMAIN_IRQ
         bool