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| author | Yasuaki Ishimatsu <isimatu.yasuaki@jp.fujitsu.com> | 2007-07-17 14:22:55 +0200 |
|---|---|---|
| committer | Tony Luck <tony.luck@intel.com> | 2007-07-17 18:58:06 +0200 |
| commit | d080d397f97dd185ff48ef933be09a104d47fba5 (patch) | |
| tree | 884c9f66c5b80d1e23956c4ecd2a1a1fee4dd05e | |
| parent | [IA64] Support irq migration across domain (diff) | |
| download | linux-d080d397f97dd185ff48ef933be09a104d47fba5.tar.xz linux-d080d397f97dd185ff48ef933be09a104d47fba5.zip | |
[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>
| -rw-r--r-- | Documentation/kernel-parameters.txt | 3 | ||||
| -rw-r--r-- | 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 8363ad3ba018..c48bc2e159ce 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 22806b94025a..5cb804f9a1ff 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) |