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]>
Documentation/kernel-parameters.txt | 3 +++
arch/ia64/kernel/irq_ia64.c | 26 ++++++++++++++++++++++++++
2 files changed, 29 insertions(+)
Index: linux-2.6.22/arch/ia64/kernel/irq_ia64.c
===================================================================
--- linux-2.6.22.orig/arch/ia64/kernel/irq_ia64.c 2007-07-17
12:09:47.000000000 +0900
+++ linux-2.6.22/arch/ia64/kernel/irq_ia64.c 2007-07-17 12:10:37.000000000
+0900
@@ -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)
Index: linux-2.6.22/Documentation/kernel-parameters.txt
===================================================================
--- linux-2.6.22.orig/Documentation/kernel-parameters.txt 2007-07-17
12:08:13.000000000 +0900
+++ linux-2.6.22/Documentation/kernel-parameters.txt 2007-07-17
12:10:37.000000000 +0900
@@ -1917,6 +1917,9 @@ and is between 256 and 4096 characters.
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.
-
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