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xen: refactor suspend pre/post hooks

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New architectures currently have to provide implementations of 5 different
functions: xen_arch_pre_suspend(), xen_arch_post_suspend(),
xen_arch_hvm_post_suspend(), xen_mm_pin_all(), and xen_mm_unpin_all().

Refactor the suspend code to only require xen_arch_pre_suspend() and
xen_arch_post_suspend().

Signed-off-by: David Vrabel <[email protected]>
Reviewed-by: Boris Ostrovsky <[email protected]>
This commit is contained in:
David Vrabel 2014-05-08 11:09:23 +01:00
commit aa8532c322
4 changed files with 29 additions and 45 deletions
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45
drivers/xen/manage.c
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@ -41,9 +41,6 @@ static enum shutdown_state shutting_down = SHUTDOWN_INVALID;
struct suspend_info {
int cancelled;
unsigned long arg; /* extra hypercall argument */
void (*pre)(void);
void (*post)(int cancelled);
};
static RAW_NOTIFIER_HEAD(xen_resume_notifier);
@ -61,26 +58,6 @@ void xen_resume_notifier_unregister(struct notifier_block *nb)
EXPORT_SYMBOL_GPL(xen_resume_notifier_unregister);
#ifdef CONFIG_HIBERNATE_CALLBACKS
static void xen_hvm_post_suspend(int cancelled)
{
xen_arch_hvm_post_suspend(cancelled);
gnttab_resume();
}
static void xen_pre_suspend(void)
{
xen_mm_pin_all();
gnttab_suspend();
xen_arch_pre_suspend();
}
static void xen_post_suspend(int cancelled)
{
xen_arch_post_suspend(cancelled);
gnttab_resume();
xen_mm_unpin_all();
}
static int xen_suspend(void *data)
{
struct suspend_info *si = data;
@ -94,18 +71,20 @@ static int xen_suspend(void *data)
return err;
}
if (si->pre)
si->pre();
gnttab_suspend();
xen_arch_pre_suspend();
/*
* This hypercall returns 1 if suspend was cancelled
* or the domain was merely checkpointed, and 0 if it
* is resuming in a new domain.
*/
si->cancelled = HYPERVISOR_suspend(si->arg);
si->cancelled = HYPERVISOR_suspend(xen_pv_domain()
? virt_to_mfn(xen_start_info)
: 0);
if (si->post)
si->post(si->cancelled);
xen_arch_post_suspend(si->cancelled);
gnttab_resume();
if (!si->cancelled) {
xen_irq_resume();
@ -154,16 +133,6 @@ static void do_suspend(void)
si.cancelled = 1;
if (xen_hvm_domain()) {
si.arg = 0UL;
si.pre = NULL;
si.post = &xen_hvm_post_suspend;
} else {
si.arg = virt_to_mfn(xen_start_info);
si.pre = &xen_pre_suspend;
si.post = &xen_post_suspend;
}
err = stop_machine(xen_suspend, &si, cpumask_of(0));
raw_notifier_call_chain(&xen_resume_notifier, 0, NULL);