Reenabled linux-xen, added patches for Xen Kernel Version 2.6.27.31,

[people/pmueller/ipfire-2.x.git] / src / patches / suse-2.6.27.31 / patches.arch / x2APIC_PATCH_11_of_41_72b1e22dfcad1daca6906148fd956ffe404bb0bc

diff --git a/src/patches/suse-2.6.27.31/patches.arch/x2APIC_PATCH_11_of_41_72b1e22dfcad1daca6906148fd956ffe404bb0bc b/src/patches/suse-2.6.27.31/patches.arch/x2APIC_PATCH_11_of_41_72b1e22dfcad1daca6906148fd956ffe404bb0bc
new file mode 100644 (file)
index 0000000..2a0ed28
--- /dev/null
+++ b/src/patches/suse-2.6.27.31/patches.arch/x2APIC_PATCH_11_of_41_72b1e22dfcad1daca6906148fd956ffe404bb0bc
@@ -0,0 +1,60 @@
+From: Suresh Siddha <suresh.b.siddha@intel.com>
+Subject: x64, x2apic/intr-remap: generic irq migration support from process context
+References: fate #303948 and fate #303984
+Patch-Mainline: queued for .28
+Commit-ID: 72b1e22dfcad1daca6906148fd956ffe404bb0bc
+
+Signed-off-by: Thomas Renninger <trenn@suse.de>
+
+Generic infrastructure for migrating the irq from the process context in the
+presence of CONFIG_GENERIC_PENDING_IRQ.
+
+This will be used later for migrating irq in the presence of
+interrupt-remapping.
+
+Signed-off-by: Suresh Siddha <suresh.b.siddha@intel.com>
+Cc: akpm@linux-foundation.org
+Cc: arjan@linux.intel.com
+Cc: andi@firstfloor.org
+Cc: ebiederm@xmission.com
+Cc: jbarnes@virtuousgeek.org
+Cc: steiner@sgi.com
+Signed-off-by: Ingo Molnar <mingo@elte.hu>
+
+---
+ include/linux/irq.h |    1 +
+ kernel/irq/manage.c |    9 ++++++++-
+ 2 files changed, 9 insertions(+), 1 deletion(-)
+
+Index: linux-2.6.26/include/linux/irq.h
+===================================================================
+--- linux-2.6.26.orig/include/linux/irq.h
++++ linux-2.6.26/include/linux/irq.h
+@@ -62,6 +62,7 @@ typedef      void (*irq_flow_handler_t)(unsig
+ #define IRQ_MOVE_PENDING      0x00200000      /* need to re-target IRQ destination */
+ #define IRQ_NO_BALANCING      0x00400000      /* IRQ is excluded from balancing */
+ #define IRQ_SPURIOUS_DISABLED 0x00800000      /* IRQ was disabled by the spurious trap */
++#define IRQ_MOVE_PCNTXT       0x01000000      /* IRQ migration from process context */
+ 
+ #ifdef CONFIG_IRQ_PER_CPU
+ # define CHECK_IRQ_PER_CPU(var) ((var) & IRQ_PER_CPU)
+Index: linux-2.6.26/kernel/irq/manage.c
+===================================================================
+--- linux-2.6.26.orig/kernel/irq/manage.c
++++ linux-2.6.26/kernel/irq/manage.c
+@@ -89,7 +89,14 @@ int irq_set_affinity(unsigned int irq, c
+       set_balance_irq_affinity(irq, cpumask);
+ 
+ #ifdef CONFIG_GENERIC_PENDING_IRQ
+-      set_pending_irq(irq, cpumask);
++      if (desc->status & IRQ_MOVE_PCNTXT) {
++              unsigned long flags;
++
++              spin_lock_irqsave(&desc->lock, flags);
++              desc->chip->set_affinity(irq, cpumask);
++              spin_unlock_irqrestore(&desc->lock, flags);
++      } else
++              set_pending_irq(irq, cpumask);
+ #else
+       desc->affinity = cpumask;
+       desc->chip->set_affinity(irq, cpumask);