From: Zhenzhong Duan <zhenzhong.duan@oracle.com>
Date: Fri, 28 Oct 2011 05:28:59 +0000 (-0700)
Subject: xen:pvhvm: enable PVHVM VCPU placement when using more than 32 CPUs.
X-Git-Tag: v3.1.2~8
X-Git-Url: https://git.karo-electronics.de/?a=commitdiff_plain;h=14fa9e2f0916742bf436e84895a3523551d325f5;p=karo-tx-linux.git

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

commit 90d4f5534d14815bd94c10e8ceccc57287657ecc upstream.

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

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>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
---

diff --git a/arch/x86/xen/enlighten.c b/arch/x86/xen/enlighten.c
index 2d69617950f7..46c8069ae98f 100644
--- a/arch/x86/xen/enlighten.c
+++ b/arch/x86/xen/enlighten.c
@@ -1355,7 +1355,7 @@ 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;
@@ -1385,7 +1385,6 @@ 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();