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| author | Konrad Rzeszutek Wilk <konrad.wilk@oracle.com> | 2013-04-16 14:37:04 -0400 |
|---|---|---|
| committer | Konrad Rzeszutek Wilk <konrad.wilk@oracle.com> | 2013-04-16 16:05:17 -0400 |
| commit | 27d8b207f0dbc19b35e504f5e631f00461dba7f9 (patch) | |
| tree | b5578f95d6443c222046dd00f10598d4aa2b9909 | |
| parent | 70dd4998cb85f0ecd6ac892cc7232abefa432efb (diff) | |
| download | linux-27d8b207f0dbc19b35e504f5e631f00461dba7f9.tar.bz2 | |
xen/smp/pvhvm: Don't initialize IRQ_WORKER as we are using the native one.
There is no need to use the PV version of the IRQ_WORKER mechanism
as under PVHVM we are using the native version. The native
version is using the SMP API.
They just sit around unused:
69: 0 0 xen-percpu-ipi irqwork0
83: 0 0 xen-percpu-ipi irqwork1
Signed-off-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
| -rw-r--r-- | arch/x86/xen/smp.c | 13 |
1 files changed, 12 insertions, 1 deletions
diff --git a/arch/x86/xen/smp.c b/arch/x86/xen/smp.c index 22c800af180b..415694cc8584 100644 --- a/arch/x86/xen/smp.c +++ b/arch/x86/xen/smp.c @@ -144,6 +144,13 @@ static int xen_smp_intr_init(unsigned int cpu) goto fail; per_cpu(xen_callfuncsingle_irq, cpu) = rc; + /* + * The IRQ worker on PVHVM goes through the native path and uses the + * IPI mechanism. + */ + if (xen_hvm_domain()) + return 0; + callfunc_name = kasprintf(GFP_KERNEL, "irqwork%d", cpu); rc = bind_ipi_to_irqhandler(XEN_IRQ_WORK_VECTOR, cpu, @@ -167,6 +174,9 @@ static int xen_smp_intr_init(unsigned int cpu) if (per_cpu(xen_callfuncsingle_irq, cpu) >= 0) unbind_from_irqhandler(per_cpu(xen_callfuncsingle_irq, cpu), NULL); + if (xen_hvm_domain()) + return rc; + if (per_cpu(xen_irq_work, cpu) >= 0) unbind_from_irqhandler(per_cpu(xen_irq_work, cpu), NULL); @@ -661,7 +671,8 @@ static void xen_hvm_cpu_die(unsigned int cpu) unbind_from_irqhandler(per_cpu(xen_callfunc_irq, cpu), NULL); unbind_from_irqhandler(per_cpu(xen_debug_irq, cpu), NULL); unbind_from_irqhandler(per_cpu(xen_callfuncsingle_irq, cpu), NULL); - unbind_from_irqhandler(per_cpu(xen_irq_work, cpu), NULL); + if (!xen_hvm_domain()) + unbind_from_irqhandler(per_cpu(xen_irq_work, cpu), NULL); xen_uninit_lock_cpu(cpu); xen_teardown_timer(cpu); native_cpu_die(cpu); |