Gitweb:     
http://git.kernel.org/git/?p=linux/kernel/git/torvalds/linux-2.6.git;a=commit;h=d080d397f97dd185ff48ef933be09a104d47fba5
Commit:     d080d397f97dd185ff48ef933be09a104d47fba5
Parent:     cd378f18cf73d92bf0b6e1e6b5759b5dd729a9f2
Author:     Yasuaki Ishimatsu <[EMAIL PROTECTED]>
AuthorDate: Tue Jul 17 21:22:55 2007 +0900
Committer:  Tony Luck <[EMAIL PROTECTED]>
CommitDate: Tue Jul 17 09:58:06 2007 -0700

    [IA64] Enable percpu vector domain for IA64_GENERIC
    
    Add per-CPU vector domain support for IA64_GENERIC. It is enabled by
    adding the "vector=percpu" boot option.
    
    Signed-off-by: Kenji Kaneshige <[EMAIL PROTECTED]>
    Signed-off-by: Yasuaki Ishimatsu <[EMAIL PROTECTED]>
    Signed-off-by: Tony Luck <[EMAIL PROTECTED]>
---
 Documentation/kernel-parameters.txt |    3 +++
 arch/ia64/kernel/irq_ia64.c         |   26 ++++++++++++++++++++++++++
 2 files changed, 29 insertions(+), 0 deletions(-)

diff --git a/Documentation/kernel-parameters.txt 
b/Documentation/kernel-parameters.txt
index 8363ad3..c48bc2e 100644
--- a/Documentation/kernel-parameters.txt
+++ b/Documentation/kernel-parameters.txt
@@ -1859,6 +1859,9 @@ and is between 256 and 4096 characters. It is defined in 
the file
                        vdso=1: enable VDSO (default)
                        vdso=0: disable VDSO mapping
 
+       vector=         [IA-64,SMP]
+                       vector=percpu: enable percpu vector domain
+
        video=          [FB] Frame buffer configuration
                        See Documentation/fb/modedb.txt.
 
diff --git a/arch/ia64/kernel/irq_ia64.c b/arch/ia64/kernel/irq_ia64.c
index 22806b9..5cb804f 100644
--- a/arch/ia64/kernel/irq_ia64.c
+++ b/arch/ia64/kernel/irq_ia64.c
@@ -267,10 +267,36 @@ void __setup_vector_irq(int cpu)
        }
 }
 
+#if defined(CONFIG_IA64_GENERIC)
+static enum vector_domain_type {
+       VECTOR_DOMAIN_NONE,
+       VECTOR_DOMAIN_PERCPU
+} vector_domain_type = VECTOR_DOMAIN_NONE;
+
+static cpumask_t vector_allocation_domain(int cpu)
+{
+       if (vector_domain_type == VECTOR_DOMAIN_PERCPU)
+               return cpumask_of_cpu(cpu);
+       return CPU_MASK_ALL;
+}
+
+static int __init parse_vector_domain(char *arg)
+{
+       if (!arg)
+               return -EINVAL;
+       if (!strcmp(arg, "percpu")) {
+               vector_domain_type = VECTOR_DOMAIN_PERCPU;
+               no_int_routing = 1;
+       }
+       return 1;
+}
+early_param("vector", parse_vector_domain);
+#else
 static cpumask_t vector_allocation_domain(int cpu)
 {
        return CPU_MASK_ALL;
 }
+#endif
 
 
 void destroy_and_reserve_irq(unsigned int irq)
-
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