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| author | André Fabian Silva Delgado <emulatorman@parabola.nu> | 2016-01-20 14:01:31 -0300 |
|---|---|---|
| committer | André Fabian Silva Delgado <emulatorman@parabola.nu> | 2016-01-20 14:01:31 -0300 |
| commit | b4b7ff4b08e691656c9d77c758fc355833128ac0 (patch) | |
| tree | 82fcb00e6b918026dc9f2d1f05ed8eee83874cc0 /arch/arm/xen/enlighten.c | |
| parent | 35acfa0fc609f2a2cd95cef4a6a9c3a5c38f1778 (diff) | |
Linux-libre 4.4-gnupck-4.4-gnu
Diffstat (limited to 'arch/arm/xen/enlighten.c')
| -rw-r--r-- | arch/arm/xen/enlighten.c | 20 |
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); |