134 lines
2.6 KiB
C
134 lines
2.6 KiB
C
#include <linux/types.h>
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#include <linux/tick.h>
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#include <linux/percpu-defs.h>
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#include <xen/xen.h>
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#include <xen/interface/xen.h>
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#include <xen/grant_table.h>
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#include <xen/events.h>
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#include <asm/cpufeatures.h>
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#include <asm/msr-index.h>
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#include <asm/xen/hypercall.h>
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#include <asm/xen/page.h>
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#include <asm/fixmap.h>
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#include "xen-ops.h"
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#include "mmu.h"
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#include "pmu.h"
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static void xen_pv_pre_suspend(void)
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{
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xen_mm_pin_all();
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xen_start_info->store_mfn = mfn_to_pfn(xen_start_info->store_mfn);
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xen_start_info->console.domU.mfn =
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mfn_to_pfn(xen_start_info->console.domU.mfn);
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BUG_ON(!irqs_disabled());
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HYPERVISOR_shared_info = &xen_dummy_shared_info;
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if (HYPERVISOR_update_va_mapping(fix_to_virt(FIX_PARAVIRT_BOOTMAP),
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__pte_ma(0), 0))
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BUG();
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}
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static void xen_hvm_post_suspend(int suspend_cancelled)
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{
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#ifdef CONFIG_XEN_PVHVM
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int cpu;
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if (!suspend_cancelled)
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xen_hvm_init_shared_info();
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xen_callback_vector();
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xen_unplug_emulated_devices();
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if (xen_feature(XENFEAT_hvm_safe_pvclock)) {
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for_each_online_cpu(cpu) {
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xen_setup_runstate_info(cpu);
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}
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}
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#endif
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}
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static void xen_pv_post_suspend(int suspend_cancelled)
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{
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xen_build_mfn_list_list();
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xen_setup_shared_info();
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if (suspend_cancelled) {
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xen_start_info->store_mfn =
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pfn_to_mfn(xen_start_info->store_mfn);
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xen_start_info->console.domU.mfn =
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pfn_to_mfn(xen_start_info->console.domU.mfn);
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} else {
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#ifdef CONFIG_SMP
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BUG_ON(xen_cpu_initialized_map == NULL);
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cpumask_copy(xen_cpu_initialized_map, cpu_online_mask);
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#endif
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xen_vcpu_restore();
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}
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xen_mm_unpin_all();
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}
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static DEFINE_PER_CPU(u64, spec_ctrl);
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void xen_arch_pre_suspend(void)
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{
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if (xen_pv_domain())
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xen_pv_pre_suspend();
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}
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void xen_arch_post_suspend(int cancelled)
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{
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if (xen_pv_domain())
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xen_pv_post_suspend(cancelled);
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else
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xen_hvm_post_suspend(cancelled);
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}
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static void xen_vcpu_notify_restore(void *data)
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{
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if (xen_pv_domain() && boot_cpu_has(X86_FEATURE_SPEC_CTRL))
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wrmsrl(MSR_IA32_SPEC_CTRL, this_cpu_read(spec_ctrl));
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/* Boot processor notified via generic timekeeping_resume() */
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if (smp_processor_id() == 0)
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return;
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tick_resume_local();
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}
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static void xen_vcpu_notify_suspend(void *data)
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{
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u64 tmp;
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tick_suspend_local();
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if (xen_pv_domain() && boot_cpu_has(X86_FEATURE_SPEC_CTRL)) {
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rdmsrl(MSR_IA32_SPEC_CTRL, tmp);
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this_cpu_write(spec_ctrl, tmp);
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wrmsrl(MSR_IA32_SPEC_CTRL, 0);
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}
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}
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void xen_arch_resume(void)
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{
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int cpu;
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on_each_cpu(xen_vcpu_notify_restore, NULL, 1);
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for_each_online_cpu(cpu)
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xen_pmu_init(cpu);
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}
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void xen_arch_suspend(void)
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{
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int cpu;
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for_each_online_cpu(cpu)
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xen_pmu_finish(cpu);
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on_each_cpu(xen_vcpu_notify_suspend, NULL, 1);
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}
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