[tip:x86/apic] genirq: Add config option for reservation mode

[tip-bot for Thomas Gleixner <tipbot@zytor.com>]

Commit-ID:  2b5175c4fa974b6aa05bbd2ee8d443a8036a1714
Gitweb:     https://git.kernel.org/tip/2b5175c4fa974b6aa05bbd2ee8d443a8036a1714
Author:     Thomas Gleixner <tglx@linutronix.de>
AuthorDate: Tue, 17 Oct 2017 09:54:57 +0200
Committer:  Thomas Gleixner <tglx@linutronix.de>
CommitDate: Wed, 18 Oct 2017 15:38:30 +0200

genirq: Add config option for reservation mode

The interrupt reservation mode requires reactivation of PCI/MSI
interrupts. Create a config option, so the PCI code can set the
corresponding flag when required.

Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Cc: Josh Poulson <jopoulso@microsoft.com>
Cc: Mihai Costache <v-micos@microsoft.com>
Cc: Stephen Hemminger <sthemmin@microsoft.com>
Cc: Marc Zyngier <marc.zyngier@arm.com>
Cc: linux-pci@vger.kernel.org
Cc: Haiyang Zhang <haiyangz@microsoft.com>
Cc: Dexuan Cui <decui@microsoft.com>
Cc: Simon Xiao <sixiao@microsoft.com>
Cc: Saeed Mahameed <saeedm@mellanox.com>
Cc: Jork Loeser <Jork.Loeser@microsoft.com>
Cc: Bjorn Helgaas <bhelgaas@google.com>
Cc: devel@linuxdriverproject.org
Cc: KY Srinivasan <kys@microsoft.com>
Link: https://lkml.kernel.org/r/20171017075600.369375409@linutronix.de

---
 kernel/irq/Kconfig | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/kernel/irq/Kconfig b/kernel/irq/Kconfig
index ac1a3e2..89e3558 100644
--- a/kernel/irq/Kconfig
+++ b/kernel/irq/Kconfig
@@ -100,6 +100,9 @@ config IRQ_TIMINGS
 config GENERIC_IRQ_MATRIX_ALLOCATOR
 	bool
 
+config GENERIC_IRQ_RESERVATION_MODE
+	bool
+
 config IRQ_DOMAIN_DEBUG
 	bool "Expose hardware/virtual IRQ mapping via debugfs"
 	depends on IRQ_DOMAIN && DEBUG_FS