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authorAndré Fabian Silva Delgado <emulatorman@parabola.nu>2016-01-20 14:01:31 -0300
committerAndré Fabian Silva Delgado <emulatorman@parabola.nu>2016-01-20 14:01:31 -0300
commitb4b7ff4b08e691656c9d77c758fc355833128ac0 (patch)
tree82fcb00e6b918026dc9f2d1f05ed8eee83874cc0 /arch/arm/xen/enlighten.c
parent35acfa0fc609f2a2cd95cef4a6a9c3a5c38f1778 (diff)
Linux-libre 4.4-gnupck-4.4-gnu
Diffstat (limited to 'arch/arm/xen/enlighten.c')
-rw-r--r--arch/arm/xen/enlighten.c20
1 files changed, 16 insertions, 4 deletions
diff --git a/arch/arm/xen/enlighten.c b/arch/arm/xen/enlighten.c
index eeeab074e..fc7ea529f 100644
--- a/arch/arm/xen/enlighten.c
+++ b/arch/arm/xen/enlighten.c
@@ -86,16 +86,25 @@ static void xen_percpu_init(void)
int err;
int cpu = get_cpu();
+ /*
+ * VCPUOP_register_vcpu_info cannot be called twice for the same
+ * vcpu, so if vcpu_info is already registered, just get out. This
+ * can happen with cpu-hotplug.
+ */
+ if (per_cpu(xen_vcpu, cpu) != NULL)
+ goto after_register_vcpu_info;
+
pr_info("Xen: initializing cpu%d\n", cpu);
vcpup = per_cpu_ptr(xen_vcpu_info, cpu);
- info.mfn = __pa(vcpup) >> PAGE_SHIFT;
- info.offset = offset_in_page(vcpup);
+ info.mfn = virt_to_gfn(vcpup);
+ info.offset = xen_offset_in_page(vcpup);
err = HYPERVISOR_vcpu_op(VCPUOP_register_vcpu_info, cpu, &info);
BUG_ON(err);
per_cpu(xen_vcpu, cpu) = vcpup;
+after_register_vcpu_info:
enable_percpu_irq(xen_events_irq, 0);
put_cpu();
}
@@ -124,6 +133,9 @@ static int xen_cpu_notification(struct notifier_block *self,
case CPU_STARTING:
xen_percpu_init();
break;
+ case CPU_DYING:
+ disable_percpu_irq(xen_events_irq);
+ break;
default:
break;
}
@@ -213,7 +225,7 @@ static int __init xen_guest_init(void)
xatp.domid = DOMID_SELF;
xatp.idx = 0;
xatp.space = XENMAPSPACE_shared_info;
- xatp.gpfn = __pa(shared_info_page) >> PAGE_SHIFT;
+ xatp.gpfn = virt_to_gfn(shared_info_page);
if (HYPERVISOR_memory_op(XENMEM_add_to_physmap, &xatp))
BUG();
@@ -284,7 +296,7 @@ void xen_arch_resume(void) { }
void xen_arch_suspend(void) { }
-/* In the hypervisor.S file. */
+/* In the hypercall.S file. */
EXPORT_SYMBOL_GPL(HYPERVISOR_event_channel_op);
EXPORT_SYMBOL_GPL(HYPERVISOR_grant_table_op);
EXPORT_SYMBOL_GPL(HYPERVISOR_xen_version);