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xen:pvhvm: enable PVHVM VCPU placement when using more than 32 CPUs.

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PVHVM running with more than 32 vcpus and pv_irq/pv_time enabled
need VCPU placement to work, or else it will softlockup.

CC: stable@kernel.org
Acked-by: Stefano Stabellini <stefano.stabellini@eu.citrix.com>
Signed-off-by: Zhenzhong Duan <zhenzhong.duan@oracle.com>
Signed-off-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
This commit is contained in:
Zhenzhong Duan 2011-10-27 22:28:59 -07:00 committed by Konrad Rzeszutek Wilk
parent 72e9cf2ab1
commit 90d4f5534d
1 changed files with 1 additions and 2 deletions
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3
arch/x86/xen/enlighten.c
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@ -1356,7 +1356,7 @@ static int __cpuinit xen_hvm_cpu_notify(struct notifier_block *self,
int cpu = (long)hcpu; int cpu = (long)hcpu;
switch (action) { switch (action) {
case CPU_UP_PREPARE: case CPU_UP_PREPARE:
per_cpu(xen_vcpu, cpu) = &HYPERVISOR_shared_info->vcpu_info[cpu]; xen_vcpu_setup(cpu);
if (xen_have_vector_callback) if (xen_have_vector_callback)
xen_init_lock_cpu(cpu); xen_init_lock_cpu(cpu);
break; break;
@ -1386,7 +1386,6 @@ static void __init xen_hvm_guest_init(void)
xen_hvm_smp_init(); xen_hvm_smp_init();
register_cpu_notifier(&xen_hvm_cpu_notifier); register_cpu_notifier(&xen_hvm_cpu_notifier);
xen_unplug_emulated_devices(); xen_unplug_emulated_devices();
have_vcpu_info_placement = 0;
x86_init.irqs.intr_init = xen_init_IRQ; x86_init.irqs.intr_init = xen_init_IRQ;
xen_hvm_init_time_ops(); xen_hvm_init_time_ops();
xen_hvm_init_mmu_ops(); xen_hvm_init_mmu_ops();