[Xen-changelog] Auto-disable IRQ balancing/affinity on buggy chipsets.

[Xen patchbot -unstable <patchbot-unstable@xxxxxxxxxxxxxxxxxxx>]

# HG changeset patch
# User kaf24@xxxxxxxxxxxxxxxxxxxx
# Node ID ca90d2903b7b31506430cfb10653cad1c374bd74
# Parent  57dfd651cca4506860ece03f858860b80d1fe9b3

Auto-disable IRQ balancing/affinity on buggy chipsets.
Signed-off-by: Keir Fraser <keir@xxxxxxxxxxxxx>

diff -r 57dfd651cca4 -r ca90d2903b7b 
linux-2.6-xen-sparse/arch/xen/i386/kernel/Makefile
--- a/linux-2.6-xen-sparse/arch/xen/i386/kernel/Makefile        Thu Jul 14 
10:37:49 2005
+++ b/linux-2.6-xen-sparse/arch/xen/i386/kernel/Makefile        Thu Jul 14 
11:09:21 2005
@@ -10,12 +10,12 @@
 
 obj-y  := process.o signal.o entry.o traps.o \
                time.o ioport.o ldt.o setup.o \
-               pci-dma.o i386_ksyms.o irq.o
+               pci-dma.o i386_ksyms.o irq.o quirks.o
 
 c-obj-y        := semaphore.o vm86.o \
                ptrace.o sys_i386.o \
                i387.o dmi_scan.o bootflag.o \
-               doublefault.o quirks.o
+               doublefault.o
 s-obj-y        :=
 
 obj-y                          += cpu/
diff -r 57dfd651cca4 -r ca90d2903b7b xen/arch/x86/irq.c
--- a/xen/arch/x86/irq.c        Thu Jul 14 10:37:49 2005
+++ b/xen/arch/x86/irq.c        Thu Jul 14 11:09:21 2005
@@ -16,7 +16,7 @@
 #include <asm/smpboot.h>
 
 /* opt_noirqbalance: If true, software IRQ balancing/affinity is disabled. */
-static int opt_noirqbalance = 0;
+int opt_noirqbalance = 0;
 boolean_param("noirqbalance", opt_noirqbalance);
 
 irq_desc_t irq_desc[NR_IRQS];
diff -r 57dfd651cca4 -r ca90d2903b7b xen/arch/x86/dom0_ops.c
--- a/xen/arch/x86/dom0_ops.c   Thu Jul 14 10:37:49 2005
+++ b/xen/arch/x86/dom0_ops.c   Thu Jul 14 11:09:21 2005
@@ -18,6 +18,7 @@
 #include <xen/trace.h>
 #include <xen/console.h>
 #include <asm/shadow.h>
+#include <asm/irq.h>
 #include <public/sched_ctl.h>
 
 #include <asm/mtrr.h>
@@ -371,6 +372,23 @@
     }
     break;
 
+    case DOM0_PLATFORM_QUIRK:
+    {
+        extern int opt_noirqbalance;
+        switch ( op->u.platform_quirk.quirk_id )
+        {
+        case QUIRK_NOIRQBALANCING:
+            printk("Platform quirk -- Disabling IRQ balancing/affinity.\n");
+            opt_noirqbalance = 1;
+            setup_ioapic_dest();
+            break;
+        default:
+            ret = -EINVAL;
+            break;
+        }
+    }
+    break;
+
     default:
         ret = -ENOSYS;
 
diff -r 57dfd651cca4 -r ca90d2903b7b xen/include/public/dom0_ops.h
--- a/xen/include/public/dom0_ops.h     Thu Jul 14 10:37:49 2005
+++ b/xen/include/public/dom0_ops.h     Thu Jul 14 11:09:21 2005
@@ -357,7 +357,7 @@
     u64     cpu_time;                 
 } dom0_getvcpucontext_t;
 
-#define DOM0_GETDOMAININFOLIST    38
+#define DOM0_GETDOMAININFOLIST   38
 typedef struct {
     /* IN variables. */
     domid_t               first_domain;
@@ -366,6 +366,13 @@
     /* OUT variables. */
     memory_t              num_domains;
 } dom0_getdomaininfolist_t;
+
+#define DOM0_PLATFORM_QUIRK      39  
+#define QUIRK_NOIRQBALANCING  1
+typedef struct {
+    /* IN variables. */
+    int quirk_id;
+} dom0_platform_quirk_t;
 
 typedef struct {
     u32 cmd;
@@ -400,6 +407,7 @@
         dom0_ioport_permission_t ioport_permission;
         dom0_getvcpucontext_t    getvcpucontext;
         dom0_getdomaininfolist_t getdomaininfolist;
+        dom0_platform_quirk_t    platform_quirk;
     } u;
 } dom0_op_t;
 
diff -r 57dfd651cca4 -r ca90d2903b7b 
linux-2.6-xen-sparse/arch/xen/x86_64/kernel/Makefile
--- a/linux-2.6-xen-sparse/arch/xen/x86_64/kernel/Makefile      Thu Jul 14 
10:37:49 2005
+++ b/linux-2.6-xen-sparse/arch/xen/x86_64/kernel/Makefile      Thu Jul 14 
11:09:21 2005
@@ -51,7 +51,7 @@
 swiotlb-$(CONFIG_SWIOTLB)      += ../../../ia64/lib/swiotlb.o
 microcode-$(subst m,y,$(CONFIG_MICROCODE))  += ../../../i386/kernel/microcode.o
 intel_cacheinfo-y              += ../../../i386/kernel/cpu/intel_cacheinfo.o
-quirks-y                       += ../../../i386/kernel/quirks.o
+quirks-y                       += ../../i386/kernel/quirks.o
 
 c-link := init_task.o
 s-link := vsyscall.o 

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