forked from Minki/linux
409771d258
Use xen_vcpuop_clockevent instead of hpet and APIC timers as main clockevent device on all vcpus, use the xen wallclock time as wallclock instead of rtc and use xen_clocksource as clocksource. The pv clock algorithm needs to work correctly for the xen_clocksource and xen wallclock to be usable, only modern Xen versions offer a reliable pv clock in HVM guests (XENFEAT_hvm_safe_pvclock). Using the hpet as clocksource means a VMEXIT every time we read/write to the hpet mmio addresses, pvclock give us a better rating without VMEXITs. Same goes for the xen wallclock and xen_vcpuop_clockevent Signed-off-by: Stefano Stabellini <stefano.stabellini@eu.citrix.com> Signed-off-by: Don Dutile <ddutile@redhat.com> Signed-off-by: Jeremy Fitzhardinge <jeremy.fitzhardinge@citrix.com>
78 lines
1.6 KiB
C
78 lines
1.6 KiB
C
#include <linux/types.h>
|
|
#include <linux/clockchips.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"
|
|
|
|
void xen_pre_suspend(void)
|
|
{
|
|
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();
|
|
}
|
|
|
|
void xen_hvm_post_suspend(int suspend_cancelled)
|
|
{
|
|
int cpu;
|
|
xen_hvm_init_shared_info();
|
|
xen_callback_vector();
|
|
if (xen_feature(XENFEAT_hvm_safe_pvclock)) {
|
|
for_each_online_cpu(cpu) {
|
|
xen_setup_runstate_info(cpu);
|
|
}
|
|
}
|
|
}
|
|
|
|
void xen_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();
|
|
}
|
|
|
|
}
|
|
|
|
static void xen_vcpu_notify_restore(void *data)
|
|
{
|
|
unsigned long reason = (unsigned long)data;
|
|
|
|
/* Boot processor notified via generic timekeeping_resume() */
|
|
if ( smp_processor_id() == 0)
|
|
return;
|
|
|
|
clockevents_notify(reason, NULL);
|
|
}
|
|
|
|
void xen_arch_resume(void)
|
|
{
|
|
on_each_cpu(xen_vcpu_notify_restore,
|
|
(void *)CLOCK_EVT_NOTIFY_RESUME, 1);
|
|
}
|