diff options
Diffstat (limited to 'drivers/xen/manage.c')
| -rw-r--r-- | drivers/xen/manage.c | 84 |
1 files changed, 64 insertions, 20 deletions
diff --git a/drivers/xen/manage.c b/drivers/xen/manage.c index 10d03d7931c4..ef9c7db52077 100644 --- a/drivers/xen/manage.c +++ b/drivers/xen/manage.c @@ -3,11 +3,13 @@ */ #include <linux/kernel.h> #include <linux/err.h> +#include <linux/slab.h> #include <linux/reboot.h> #include <linux/sysrq.h> #include <linux/stop_machine.h> #include <linux/freezer.h> +#include <xen/xen.h> #include <xen/xenbus.h> #include <xen/grant_table.h> #include <xen/events.h> @@ -16,6 +18,7 @@ #include <asm/xen/hypercall.h> #include <asm/xen/page.h> +#include <asm/xen/hypervisor.h> enum shutdown_state { SHUTDOWN_INVALID = -1, @@ -32,10 +35,30 @@ enum shutdown_state { static enum shutdown_state shutting_down = SHUTDOWN_INVALID; #ifdef CONFIG_PM_SLEEP -static int xen_suspend(void *data) +static int xen_hvm_suspend(void *data) { + struct sched_shutdown r = { .reason = SHUTDOWN_suspend }; int *cancelled = data; + + BUG_ON(!irqs_disabled()); + + *cancelled = HYPERVISOR_sched_op(SCHEDOP_shutdown, &r); + + xen_hvm_post_suspend(*cancelled); + gnttab_resume(); + + if (!*cancelled) { + xen_irq_resume(); + xen_timer_resume(); + } + + return 0; +} + +static int xen_suspend(void *data) +{ int err; + int *cancelled = data; BUG_ON(!irqs_disabled()); @@ -43,7 +66,6 @@ static int xen_suspend(void *data) if (err) { printk(KERN_ERR "xen_suspend: sysdev_suspend failed: %d\n", err); - dpm_resume_noirq(PMSG_RESUME); return err; } @@ -69,7 +91,6 @@ static int xen_suspend(void *data) } sysdev_resume(); - dpm_resume_noirq(PMSG_RESUME); return 0; } @@ -88,14 +109,14 @@ static void do_suspend(void) err = freeze_processes(); if (err) { printk(KERN_ERR "xen suspend: freeze failed %d\n", err); - return; + goto out; } #endif err = dpm_suspend_start(PMSG_SUSPEND); if (err) { printk(KERN_ERR "xen suspend: dpm_suspend_start %d\n", err); - goto out; + goto out_thaw; } printk(KERN_DEBUG "suspending xenstore...\n"); @@ -104,31 +125,37 @@ static void do_suspend(void) err = dpm_suspend_noirq(PMSG_SUSPEND); if (err) { printk(KERN_ERR "dpm_suspend_noirq failed: %d\n", err); - goto resume_devices; + goto out_resume; } - err = stop_machine(xen_suspend, &cancelled, cpumask_of(0)); + if (xen_hvm_domain()) + err = stop_machine(xen_hvm_suspend, &cancelled, cpumask_of(0)); + else + err = stop_machine(xen_suspend, &cancelled, cpumask_of(0)); + + dpm_resume_noirq(PMSG_RESUME); + if (err) { printk(KERN_ERR "failed to start xen_suspend: %d\n", err); - goto out; + cancelled = 1; } +out_resume: if (!cancelled) { xen_arch_resume(); xs_resume(); } else xs_suspend_cancel(); - dpm_resume_noirq(PMSG_RESUME); - -resume_devices: dpm_resume_end(PMSG_RESUME); /* Make sure timer events get retriggered on all CPUs */ clock_was_set(); -out: + +out_thaw: #ifdef CONFIG_PREEMPT thaw_processes(); +out: #endif shutting_down = SHUTDOWN_INVALID; } @@ -183,6 +210,7 @@ static void shutdown_handler(struct xenbus_watch *watch, kfree(str); } +#ifdef CONFIG_MAGIC_SYSRQ static void sysrq_handler(struct xenbus_watch *watch, const char **vec, unsigned int len) { @@ -209,18 +237,19 @@ static void sysrq_handler(struct xenbus_watch *watch, const char **vec, goto again; if (sysrq_key != '\0') - handle_sysrq(sysrq_key, NULL); + handle_sysrq(sysrq_key); } -static struct xenbus_watch shutdown_watch = { - .node = "control/shutdown", - .callback = shutdown_handler -}; - static struct xenbus_watch sysrq_watch = { .node = "control/sysrq", .callback = sysrq_handler }; +#endif + +static struct xenbus_watch shutdown_watch = { + .node = "control/shutdown", + .callback = shutdown_handler +}; static int setup_shutdown_watcher(void) { @@ -232,11 +261,13 @@ static int setup_shutdown_watcher(void) return err; } +#ifdef CONFIG_MAGIC_SYSRQ err = register_xenbus_watch(&sysrq_watch); if (err) { printk(KERN_ERR "Failed to set sysrq watcher\n"); return err; } +#endif return 0; } @@ -249,7 +280,19 @@ static int shutdown_event(struct notifier_block *notifier, return NOTIFY_DONE; } -static int __init setup_shutdown_event(void) +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 @@ -258,5 +301,6 @@ static int __init setup_shutdown_event(void) return 0; } +EXPORT_SYMBOL_GPL(xen_setup_shutdown_event); -subsys_initcall(setup_shutdown_event); +subsys_initcall(__setup_shutdown_event); |