diff options
authorQais Yousef <qais.yousef@imgtec.com>2015-12-08 13:20:16 +0000
committerThomas Gleixner <tglx@linutronix.de>2016-02-25 10:56:55 +0100
commitf256c9a0c54820ffef21b126f8226be2bece3dd7 (patch)
parent955bfe5912e7839abcc83694f06867535487404b (diff)
genirq: Add ipi_offset to irq_common_data
IPIs are always assumed to be consecutively allocated, hence virqs and hwirqs can be inferred by using CPU id as an offset. But the first cpu doesn't always have to start at offset 0. ipi_offset stores the position of the first cpu so that we can easily calculate the virq or hwirq of an IPI associated with a specific cpu. Signed-off-by: Qais Yousef <qais.yousef@imgtec.com> Cc: <jason@lakedaemon.net> Cc: <marc.zyngier@arm.com> Cc: <jiang.liu@linux.intel.com> Cc: <ralf@linux-mips.org> Cc: <linux-mips@linux-mips.org> Cc: <lisa.parratt@imgtec.com> Cc: Qais Yousef <qsyousef@gmail.com> Link: http://lkml.kernel.org/r/1449580830-23652-6-git-send-email-qais.yousef@imgtec.com Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
1 files changed, 4 insertions, 0 deletions
diff --git a/include/linux/irq.h b/include/linux/irq.h
index 0817afd0d719..a32b47fbf874 100644
--- a/include/linux/irq.h
+++ b/include/linux/irq.h
@@ -137,6 +137,7 @@ struct irq_domain;
* related irq, then this is the mask of the
* CPUs to which an IPI can be sent.
* @msi_desc: MSI descriptor
+ * @ipi_offset: Offset of first IPI target cpu in @affinity. Optional.
struct irq_common_data {
unsigned int state_use_accessors;
@@ -146,6 +147,9 @@ struct irq_common_data {
void *handler_data;
struct msi_desc *msi_desc;
cpumask_var_t affinity;
+ unsigned int ipi_offset;