diff options
Diffstat (limited to 'kernel/arch/x86/xen/suspend.c')
-rw-r--r-- | kernel/arch/x86/xen/suspend.c | 104 |
1 files changed, 104 insertions, 0 deletions
diff --git a/kernel/arch/x86/xen/suspend.c b/kernel/arch/x86/xen/suspend.c new file mode 100644 index 000000000..53b4c0811 --- /dev/null +++ b/kernel/arch/x86/xen/suspend.c @@ -0,0 +1,104 @@ +#include <linux/types.h> +#include <linux/tick.h> + +#include <xen/interface/xen.h> +#include <xen/grant_table.h> +#include <xen/events.h> + +#include <asm/xen/hypercall.h> +#include <asm/xen/page.h> +#include <asm/fixmap.h> + +#include "xen-ops.h" +#include "mmu.h" + +static void xen_pv_pre_suspend(void) +{ + xen_mm_pin_all(); + + xen_start_info->store_mfn = mfn_to_pfn(xen_start_info->store_mfn); + xen_start_info->console.domU.mfn = + mfn_to_pfn(xen_start_info->console.domU.mfn); + + BUG_ON(!irqs_disabled()); + + HYPERVISOR_shared_info = &xen_dummy_shared_info; + if (HYPERVISOR_update_va_mapping(fix_to_virt(FIX_PARAVIRT_BOOTMAP), + __pte_ma(0), 0)) + BUG(); +} + +static void xen_hvm_post_suspend(int suspend_cancelled) +{ +#ifdef CONFIG_XEN_PVHVM + int cpu; + xen_hvm_init_shared_info(); + xen_callback_vector(); + xen_unplug_emulated_devices(); + if (xen_feature(XENFEAT_hvm_safe_pvclock)) { + for_each_online_cpu(cpu) { + xen_setup_runstate_info(cpu); + } + } +#endif +} + +static void xen_pv_post_suspend(int suspend_cancelled) +{ + xen_build_mfn_list_list(); + + xen_setup_shared_info(); + + if (suspend_cancelled) { + xen_start_info->store_mfn = + pfn_to_mfn(xen_start_info->store_mfn); + xen_start_info->console.domU.mfn = + pfn_to_mfn(xen_start_info->console.domU.mfn); + } else { +#ifdef CONFIG_SMP + BUG_ON(xen_cpu_initialized_map == NULL); + cpumask_copy(xen_cpu_initialized_map, cpu_online_mask); +#endif + xen_vcpu_restore(); + } + + xen_mm_unpin_all(); +} + +void xen_arch_pre_suspend(void) +{ + if (xen_pv_domain()) + xen_pv_pre_suspend(); +} + +void xen_arch_post_suspend(int cancelled) +{ + if (xen_pv_domain()) + xen_pv_post_suspend(cancelled); + else + xen_hvm_post_suspend(cancelled); +} + +static void xen_vcpu_notify_restore(void *data) +{ + /* Boot processor notified via generic timekeeping_resume() */ + if (smp_processor_id() == 0) + return; + + tick_resume_local(); +} + +static void xen_vcpu_notify_suspend(void *data) +{ + tick_suspend_local(); +} + +void xen_arch_resume(void) +{ + on_each_cpu(xen_vcpu_notify_restore, NULL, 1); +} + +void xen_arch_suspend(void) +{ + on_each_cpu(xen_vcpu_notify_suspend, NULL, 1); +} |