[MIPS] IRQ Affinity Support for SMTC on Malta Platform

    
Signed-off-by: Kevin D. Kissell <kevink@mips.com>
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>

1 files changed, 13 insertions, 0 deletions

diff --git a/arch/mips/Kconfig b/arch/mips/Kconfig
index 3b807b4bc7cd..b09eee2281c5 100644
--- a/arch/mips/Kconfig
+++ b/arch/mips/Kconfig
@@ -1378,6 +1378,19 @@ config MIPS_MT_SMTC_IM_BACKSTOP
           impact on interrupt service overhead. Disable it only if you know
           what you are doing.
 
+config MIPS_MT_SMTC_IRQAFF
+        bool "Support IRQ affinity API"
+        depends on MIPS_MT_SMTC
+        default n
+        help
+          Enables SMP IRQ affinity API (/proc/irq/*/smp_affinity, etc.)
+          for SMTC Linux kernel. Requires platform support, of which
+          an example can be found in the MIPS kernel i8259 and Malta
+          platform code.  It is recommended that MIPS_MT_SMTC_INSTANT_REPLAY
+          be enabled if MIPS_MT_SMTC_IRQAFF is used. Adds overhead to
+          interrupt dispatch, and should be used only if you know what
+          you are doing.
+
 config MIPS_VPE_LOADER_TOM
         bool "Load VPE program into memory hidden from linux"
         depends on MIPS_VPE_LOADER