Commit 90d4f553 authored by Zhenzhong Duan's avatar Zhenzhong Duan Committed by Konrad Rzeszutek Wilk
Browse files

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



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: default avatarStefano Stabellini <stefano.stabellini@eu.citrix.com>
Signed-off-by: default avatarZhenzhong Duan <zhenzhong.duan@oracle.com>
Signed-off-by: default avatarKonrad Rzeszutek Wilk <konrad.wilk@oracle.com>
parent 72e9cf2a

arch/x86/xen/enlighten.c

+1 −2
Original line number Diff line number Diff line
@@ -1356,7 +1356,7 @@ static int __cpuinit xen_hvm_cpu_notify(struct notifier_block *self, 
	int cpu = (long)hcpu;

	switch (action) {

	case CPU_UP_PREPARE:

		per_cpu(xen_vcpu, cpu) = &HYPERVISOR_shared_info->vcpu_info[cpu];

		xen_vcpu_setup(cpu);

		if (xen_have_vector_callback)

			xen_init_lock_cpu(cpu);

		break;
@@ -1386,7 +1386,6 @@ static void __init xen_hvm_guest_init(void) 
	xen_hvm_smp_init();

	register_cpu_notifier(&xen_hvm_cpu_notifier);

	xen_unplug_emulated_devices();

	have_vcpu_info_placement = 0;

	x86_init.irqs.intr_init = xen_init_IRQ;

	xen_hvm_init_time_ops();

	xen_hvm_init_mmu_ops();

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