mirror of https://github.com/Qortal/Brooklyn
You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
84 lines
1.5 KiB
84 lines
1.5 KiB
// SPDX-License-Identifier: GPL-2.0 |
|
#include <linux/types.h> |
|
#include <linux/tick.h> |
|
#include <linux/percpu-defs.h> |
|
|
|
#include <xen/xen.h> |
|
#include <xen/interface/xen.h> |
|
#include <xen/grant_table.h> |
|
#include <xen/events.h> |
|
|
|
#include <asm/cpufeatures.h> |
|
#include <asm/msr-index.h> |
|
#include <asm/xen/hypercall.h> |
|
#include <asm/xen/page.h> |
|
#include <asm/fixmap.h> |
|
|
|
#include "xen-ops.h" |
|
#include "mmu.h" |
|
#include "pmu.h" |
|
|
|
static DEFINE_PER_CPU(u64, spec_ctrl); |
|
|
|
void xen_arch_pre_suspend(void) |
|
{ |
|
xen_save_time_memory_area(); |
|
|
|
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); |
|
|
|
xen_restore_time_memory_area(); |
|
} |
|
|
|
static void xen_vcpu_notify_restore(void *data) |
|
{ |
|
if (xen_pv_domain() && boot_cpu_has(X86_FEATURE_SPEC_CTRL)) |
|
wrmsrl(MSR_IA32_SPEC_CTRL, this_cpu_read(spec_ctrl)); |
|
|
|
/* Boot processor notified via generic timekeeping_resume() */ |
|
if (smp_processor_id() == 0) |
|
return; |
|
|
|
tick_resume_local(); |
|
} |
|
|
|
static void xen_vcpu_notify_suspend(void *data) |
|
{ |
|
u64 tmp; |
|
|
|
tick_suspend_local(); |
|
|
|
if (xen_pv_domain() && boot_cpu_has(X86_FEATURE_SPEC_CTRL)) { |
|
rdmsrl(MSR_IA32_SPEC_CTRL, tmp); |
|
this_cpu_write(spec_ctrl, tmp); |
|
wrmsrl(MSR_IA32_SPEC_CTRL, 0); |
|
} |
|
} |
|
|
|
void xen_arch_resume(void) |
|
{ |
|
int cpu; |
|
|
|
on_each_cpu(xen_vcpu_notify_restore, NULL, 1); |
|
|
|
for_each_online_cpu(cpu) |
|
xen_pmu_init(cpu); |
|
} |
|
|
|
void xen_arch_suspend(void) |
|
{ |
|
int cpu; |
|
|
|
for_each_online_cpu(cpu) |
|
xen_pmu_finish(cpu); |
|
|
|
on_each_cpu(xen_vcpu_notify_suspend, NULL, 1); |
|
}
|
|
|