Commit-ID: 029c6e1c9df776fe1b2ba756a28fb65e9f9e9f69
Gitweb: http://git.kernel.org/tip/029c6e1c9df776fe1b2ba756a28fb65e9f9e9f69
Author: Thomas Gleixner <tglx@xxxxxxxxxxxxx>
AuthorDate: Wed, 13 Sep 2017 23:29:31 +0200
Committer: Thomas Gleixner <tglx@xxxxxxxxxxxxx>
CommitDate: Mon, 25 Sep 2017 20:51:54 +0200
x86/vector: Store the single CPU targets in apic data
Now that the interrupt affinities are targeted at single CPUs storing them
in a cpumask is overkill. Store them in a dedicated variable.
This does not yet remove the domain cpumasks because the current allocator
relies on them. Preparatory change for the allocator rework.
Signed-off-by: Thomas Gleixner <tglx@xxxxxxxxxxxxx>
Tested-by: Juergen Gross <jgross@xxxxxxxx>
Tested-by: Yu Chen <yu.c.chen@xxxxxxxxx>
Acked-by: Juergen Gross <jgross@xxxxxxxx>
Cc: Boris Ostrovsky <boris.ostrovsky@xxxxxxxxxx>
Cc: Tony Luck <tony.luck@xxxxxxxxx>
Cc: Marc Zyngier <marc.zyngier@xxxxxxx>
Cc: Alok Kataria <akataria@xxxxxxxxxx>
Cc: Joerg Roedel <joro@xxxxxxxxxx>
Cc: "Rafael J. Wysocki" <rjw@xxxxxxxxxxxxx>
Cc: Steven Rostedt <rostedt@xxxxxxxxxxx>
Cc: Christoph Hellwig <hch@xxxxxx>
Cc: Peter Zijlstra <peterz@xxxxxxxxxxxxx>
Cc: Borislav Petkov <bp@xxxxxxxxx>
Cc: Paolo Bonzini <pbonzini@xxxxxxxxxx>
Cc: Rui Zhang <rui.zhang@xxxxxxxxx>
Cc: "K. Y. Srinivasan" <kys@xxxxxxxxxxxxx>
Cc: Arjan van de Ven <arjan@xxxxxxxxxxxxxxx>
Cc: Dan Williams <dan.j.williams@xxxxxxxxx>
Cc: Len Brown <lenb@xxxxxxxxxx>
Link: https://lkml.kernel.org/r/20170913213154.544867277@xxxxxxxxxxxxx
---
arch/x86/kernel/apic/vector.c | 5 +++++
1 file changed, 5 insertions(+)
diff --git a/arch/x86/kernel/apic/vector.c b/arch/x86/kernel/apic/vector.c
index a7f7c37..7a9e0c6 100644
--- a/arch/x86/kernel/apic/vector.c
+++ b/arch/x86/kernel/apic/vector.c
@@ -23,6 +23,8 @@
struct apic_chip_data {
struct irq_cfg cfg;
+ unsigned int cpu;
+ unsigned int prev_cpu;
cpumask_var_t domain;
cpumask_var_t old_domain;
u8 move_in_progress : 1;
@@ -214,6 +216,7 @@ update:
cpumask_and(d->old_domain, d->old_domain, cpu_online_mask);
d->move_in_progress = !cpumask_empty(d->old_domain);
d->cfg.old_vector = d->move_in_progress ? d->cfg.vector : 0;
+ d->prev_cpu = d->cpu;
d->cfg.vector = vector;
cpumask_copy(d->domain, vector_cpumask);
success:
@@ -228,6 +231,7 @@ success:
cpumask_and(vector_searchmask, vector_searchmask, mask);
BUG_ON(apic->cpu_mask_to_apicid(vector_searchmask, irqd,
&d->cfg.dest_apicid));
+ d->cpu = cpumask_first(vector_searchmask);
return 0;
}
@@ -428,6 +432,7 @@ static void __init init_legacy_irqs(void)
apicd->cfg.vector = ISA_IRQ_VECTOR(i);
cpumask_copy(apicd->domain, cpumask_of(0));
+ apicd->cpu = 0;
irq_set_chip_data(i, apicd);
}
}
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