From 99bbb3a84a99cd04ab16b998b20f01a72cfa9f4f Mon Sep 17 00:00:00 2001 From: Stefano Stabellini Date: Thu, 2 Dec 2010 17:55:10 +0000 Subject: xen: PV on HVM: support PV spinlocks and IPIs Initialize PV spinlocks on boot CPU right after native_smp_prepare_cpus (that switch to APIC mode and initialize APIC routing); on secondary CPUs on CPU_UP_PREPARE. Enable the usage of event channels to send and receive IPIs when running as a PV on HVM guest. Signed-off-by: Stefano Stabellini --- arch/x86/xen/enlighten.c | 3 +++ 1 file changed, 3 insertions(+) (limited to 'arch/x86/xen/enlighten.c') diff --git a/arch/x86/xen/enlighten.c b/arch/x86/xen/enlighten.c index 2f67e2ea222e..fe02574789c5 100644 --- a/arch/x86/xen/enlighten.c +++ b/arch/x86/xen/enlighten.c @@ -1330,6 +1330,8 @@ static int __cpuinit xen_hvm_cpu_notify(struct notifier_block *self, switch (action) { case CPU_UP_PREPARE: per_cpu(xen_vcpu, cpu) = &HYPERVISOR_shared_info->vcpu_info[cpu]; + if (xen_have_vector_callback) + xen_init_lock_cpu(cpu); break; default: break; @@ -1354,6 +1356,7 @@ static void __init xen_hvm_guest_init(void) if (xen_feature(XENFEAT_hvm_callback_vector)) xen_have_vector_callback = 1; + xen_hvm_smp_init(); register_cpu_notifier(&xen_hvm_cpu_notifier); xen_unplug_emulated_devices(); have_vcpu_info_placement = 0; -- cgit v1.2.3