From d080d397f97dd185ff48ef933be09a104d47fba5 Mon Sep 17 00:00:00 2001
From: Yasuaki Ishimatsu <isimatu.yasuaki@jp.fujitsu.com>
Date: Tue, 17 Jul 2007 21:22:55 +0900
Subject: [PATCH] [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 <kaneshige.kenji@jp.fujitsu.com>
Signed-off-by: Yasuaki Ishimatsu <isimatu.yasuaki@jp.fujitsu.com>
Signed-off-by: Tony Luck <tony.luck@intel.com>
---
Documentation/kernel-parameters.txt | 3 +++
arch/ia64/kernel/irq_ia64.c | 26 ++++++++++++++++++++++++++
2 files changed, 29 insertions(+)
diff --git a/Documentation/kernel-parameters.txt b/Documentation/kernel-parameters.txt
index 8363ad3ba0187..c48bc2e159ce1 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 22806b94025a1..5cb804f9a1ff7 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)
--
GitLab