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| author | Yasuaki Ishimatsu <isimatu.yasuaki@jp.fujitsu.com> | 2007-07-17 14:22:48 +0200 |
|---|---|---|
| committer | Tony Luck <tony.luck@intel.com> | 2007-07-17 18:57:42 +0200 |
| commit | cd378f18cf73d92bf0b6e1e6b5759b5dd729a9f2 (patch) | |
| tree | 6960768a1ddecb74e6a5fa1dfc978e5df8635eb2 /arch/ia64/kernel/msi_ia64.c | |
| parent | [IA64] Add support for vector domain (diff) | |
| download | linux-cd378f18cf73d92bf0b6e1e6b5759b5dd729a9f2.tar.xz linux-cd378f18cf73d92bf0b6e1e6b5759b5dd729a9f2.zip | |
[IA64] Support irq migration across domain
Add support for IRQ migration across vector domain.
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>
Diffstat (limited to 'arch/ia64/kernel/msi_ia64.c')
| -rw-r--r-- | arch/ia64/kernel/msi_ia64.c | 20 |
1 files changed, 14 insertions, 6 deletions
diff --git a/arch/ia64/kernel/msi_ia64.c b/arch/ia64/kernel/msi_ia64.c index 1d22670cc88b..2fdbd5c3f213 100644 --- a/arch/ia64/kernel/msi_ia64.c +++ b/arch/ia64/kernel/msi_ia64.c @@ -13,6 +13,7 @@ #define MSI_DATA_VECTOR_SHIFT 0 #define MSI_DATA_VECTOR(v) (((u8)v) << MSI_DATA_VECTOR_SHIFT) +#define MSI_DATA_VECTOR_MASK 0xffffff00 #define MSI_DATA_DELIVERY_SHIFT 8 #define MSI_DATA_DELIVERY_FIXED (0 << MSI_DATA_DELIVERY_SHIFT) @@ -50,22 +51,29 @@ static struct irq_chip ia64_msi_chip; static void ia64_set_msi_irq_affinity(unsigned int irq, cpumask_t cpu_mask) { struct msi_msg msg; - u32 addr; + u32 addr, data; + int cpu = first_cpu(cpu_mask); - /* IRQ migration across domain is not supported yet */ - cpus_and(cpu_mask, cpu_mask, irq_to_domain(irq)); - if (cpus_empty(cpu_mask)) + if (!cpu_online(cpu)) + return; + + if (reassign_irq_vector(irq, cpu)) return; read_msi_msg(irq, &msg); addr = msg.address_lo; addr &= MSI_ADDR_DESTID_MASK; - addr |= MSI_ADDR_DESTID_CPU(cpu_physical_id(first_cpu(cpu_mask))); + addr |= MSI_ADDR_DESTID_CPU(cpu_physical_id(cpu)); msg.address_lo = addr; + data = msg.data; + data &= MSI_DATA_VECTOR_MASK; + data |= MSI_DATA_VECTOR(irq_to_vector(irq)); + msg.data = data; + write_msi_msg(irq, &msg); - irq_desc[irq].affinity = cpu_mask; + irq_desc[irq].affinity = cpumask_of_cpu(cpu); } #endif /* CONFIG_SMP */ |