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Merge branch 'for-linus' of git://xenbits.xen.org/people/sstabellini/linux-pvhvm

Browse source 
* 'for-linus' of git://xenbits.xen.org/people/sstabellini/linux-pvhvm:
  xen: suspend: remove xen_hvm_suspend
  xen: suspend: pull pre/post suspend hooks out into suspend_info
  xen: suspend: move arch specific pre/post suspend hooks into generic hooks
  xen: suspend: refactor non-arch specific pre/post suspend hooks
  xen: suspend: add "arch" to pre/post suspend hooks
  xen: suspend: pass extra hypercall argument via suspend_info struct
  xen: suspend: refactor cancellation flag into a structure
  xen: suspend: use HYPERVISOR_suspend for PVHVM case instead of open coding
  xen: switch to new schedop hypercall by default.
  xen: use new schedop interface for suspend
  xen: do not respond to unknown xenstore control requests
  xen: fix compile issue if XEN is enabled but XEN_PVHVM is disabled
  xen: PV on HVM: support PV spinlocks and IPIs
  xen: make the ballon driver work for hvm domains
  xen-blkfront: handle Xen major numbers other than XENVBD
  xen: do not use xen_info on HVM, set pv_info name to "Xen HVM"
  xen: no need to delay xen_setup_shutdown_event for hvm guests anymore
This commit is contained in:
Linus Torvalds 2011-03-15 10:59:09 -07:00
commit 76ca078328
13 changed files with 257 additions and 101 deletions
Download patch file Download diff file Expand all files Collapse all files

14
drivers/xen/balloon.c
View file

@ -232,7 +232,7 @@ static int increase_reservation(unsigned long nr_pages)
set_phys_to_machine(pfn, frame_list[i]);
/* Link back into the page tables if not highmem. */
if (pfn < max_low_pfn) {
if (!xen_hvm_domain() && pfn < max_low_pfn) {
int ret;
ret = HYPERVISOR_update_va_mapping(
(unsigned long)__va(pfn << PAGE_SHIFT),
@ -280,7 +280,7 @@ static int decrease_reservation(unsigned long nr_pages)
scrub_page(page);
if (!PageHighMem(page)) {
if (!xen_hvm_domain() && !PageHighMem(page)) {
ret = HYPERVISOR_update_va_mapping(
(unsigned long)__va(pfn << PAGE_SHIFT),
__pte_ma(0), 0);
@ -392,15 +392,19 @@ static struct notifier_block xenstore_notifier;
static int __init balloon_init(void)
{
unsigned long pfn, extra_pfn_end;
unsigned long pfn, nr_pages, extra_pfn_end;
struct page *page;
if (!xen_pv_domain())
if (!xen_domain())
return -ENODEV;
pr_info("xen_balloon: Initialising balloon driver.\n");
balloon_stats.current_pages = min(xen_start_info->nr_pages, max_pfn);
if (xen_pv_domain())
nr_pages = xen_start_info->nr_pages;
else
nr_pages = max_pfn;
balloon_stats.current_pages = min(nr_pages, max_pfn);
balloon_stats.target_pages = balloon_stats.current_pages;
balloon_stats.balloon_low = 0;
balloon_stats.balloon_high = 0;

157
drivers/xen/manage.c
View file

@ -34,42 +34,38 @@ enum shutdown_state {
/* Ignore multiple shutdown requests. */
static enum shutdown_state shutting_down = SHUTDOWN_INVALID;
#ifdef CONFIG_PM_SLEEP
static int xen_hvm_suspend(void *data)
struct suspend_info {
int cancelled;
unsigned long arg; /* extra hypercall argument */
void (*pre)(void);
void (*post)(int cancelled);
};
static void xen_hvm_post_suspend(int cancelled)
{
int err;
struct sched_shutdown r = { .reason = SHUTDOWN_suspend };
int *cancelled = data;
BUG_ON(!irqs_disabled());
err = sysdev_suspend(PMSG_SUSPEND);
if (err) {
printk(KERN_ERR "xen_hvm_suspend: sysdev_suspend failed: %d\n",
err);
return err;
}
*cancelled = HYPERVISOR_sched_op(SCHEDOP_shutdown, &r);
xen_hvm_post_suspend(*cancelled);
xen_arch_hvm_post_suspend(cancelled);
gnttab_resume();
if (!*cancelled) {
xen_irq_resume();
xen_console_resume();
xen_timer_resume();
}
sysdev_resume();
return 0;
}
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();
}
#ifdef CONFIG_PM_SLEEP
static int xen_suspend(void *data)
{
struct suspend_info *si = data;
int err;
int *cancelled = data;
BUG_ON(!irqs_disabled());
@ -80,22 +76,20 @@ static int xen_suspend(void *data)
return err;
}
xen_mm_pin_all();
gnttab_suspend();
xen_pre_suspend();
if (si->pre)
si->pre();
/*
* This hypercall returns 1 if suspend was cancelled
* or the domain was merely checkpointed, and 0 if it
* is resuming in a new domain.
*/
*cancelled = HYPERVISOR_suspend(virt_to_mfn(xen_start_info));
si->cancelled = HYPERVISOR_suspend(si->arg);
xen_post_suspend(*cancelled);
gnttab_resume();
xen_mm_unpin_all();
if (si->post)
si->post(si->cancelled);
if (!*cancelled) {
if (!si->cancelled) {
xen_irq_resume();
xen_console_resume();
xen_timer_resume();
@ -109,7 +103,7 @@ static int xen_suspend(void *data)
static void do_suspend(void)
{
int err;
int cancelled = 1;
struct suspend_info si;
shutting_down = SHUTDOWN_SUSPEND;
@ -139,20 +133,29 @@ static void do_suspend(void)
goto out_resume;
}
if (xen_hvm_domain())
err = stop_machine(xen_hvm_suspend, &cancelled, cpumask_of(0));
else
err = stop_machine(xen_suspend, &cancelled, cpumask_of(0));
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));
dpm_resume_noirq(PMSG_RESUME);
if (err) {
printk(KERN_ERR "failed to start xen_suspend: %d\n", err);
cancelled = 1;
si.cancelled = 1;
}
out_resume:
if (!cancelled) {
if (!si.cancelled) {
xen_arch_resume();
xs_resume();
} else
@ -172,12 +175,39 @@ out:
}
#endif /* CONFIG_PM_SLEEP */
struct shutdown_handler {
const char *command;
void (*cb)(void);
};
static void do_poweroff(void)
{
shutting_down = SHUTDOWN_POWEROFF;
orderly_poweroff(false);
}
static void do_reboot(void)
{
shutting_down = SHUTDOWN_POWEROFF; /* ? */
ctrl_alt_del();
}
static void shutdown_handler(struct xenbus_watch *watch,
const char **vec, unsigned int len)
{
char *str;
struct xenbus_transaction xbt;
int err;
static struct shutdown_handler handlers[] = {
{ "poweroff", do_poweroff },
{ "halt", do_poweroff },
{ "reboot", do_reboot },
#ifdef CONFIG_PM_SLEEP
{ "suspend", do_suspend },
#endif
{NULL, NULL},
};
static struct shutdown_handler *handler;
if (shutting_down != SHUTDOWN_INVALID)
return;
@ -194,7 +224,14 @@ static void shutdown_handler(struct xenbus_watch *watch,
return;
}
xenbus_write(xbt, "control", "shutdown", "");
for (handler = &handlers[0]; handler->command; handler++) {
if (strcmp(str, handler->command) == 0)
break;
}
/* Only acknowledge commands which we are prepared to handle. */
if (handler->cb)
xenbus_write(xbt, "control", "shutdown", "");
err = xenbus_transaction_end(xbt, 0);
if (err == -EAGAIN) {
@ -202,17 +239,8 @@ static void shutdown_handler(struct xenbus_watch *watch,
goto again;
}
if (strcmp(str, "poweroff") == 0 ||
strcmp(str, "halt") == 0) {
shutting_down = SHUTDOWN_POWEROFF;
orderly_poweroff(false);
} else if (strcmp(str, "reboot") == 0) {
shutting_down = SHUTDOWN_POWEROFF; /* ? */
ctrl_alt_del();
#ifdef CONFIG_PM_SLEEP
} else if (strcmp(str, "suspend") == 0) {
do_suspend();
#endif
if (handler->cb) {
handler->cb();
} else {
printk(KERN_INFO "Ignoring shutdown request: %s\n", str);
shutting_down = SHUTDOWN_INVALID;
@ -291,27 +319,18 @@ static int shutdown_event(struct notifier_block *notifier,
return NOTIFY_DONE;
}
static int __init __setup_shutdown_event(void)
{
/* Delay initialization in the PV on HVM case */
if (xen_hvm_domain())
return 0;
if (!xen_pv_domain())
return -ENODEV;
return xen_setup_shutdown_event();
}
int xen_setup_shutdown_event(void)
{
static struct notifier_block xenstore_notifier = {
.notifier_call = shutdown_event
};
if (!xen_domain())
return -ENODEV;
register_xenstore_notifier(&xenstore_notifier);
return 0;
}
EXPORT_SYMBOL_GPL(xen_setup_shutdown_event);
subsys_initcall(__setup_shutdown_event);
subsys_initcall(xen_setup_shutdown_event);

3
drivers/xen/platform-pci.c
View file

@ -156,9 +156,6 @@ static int __devinit platform_pci_init(struct pci_dev *pdev,
if (ret)
goto out;
xenbus_probe(NULL);
ret = xen_setup_shutdown_event();
if (ret)
goto out;
return 0;
out: