X-Git-Url: http://ftp.safe.ca/?a=blobdiff_plain;f=drivers%2Fchar%2Fhvc_xen.c;h=eba999f8598d07a8a29fe03bac5bb4de18d39f62;hb=4a58948669702639db7acecfa2105c3172d85c93;hp=2413af342a81e18c269945acf72a27120c526d3a;hpb=0922abdc3982ae54cbe1b24ac5aa91a260eca1bb;p=safe%2Fjmp%2Flinux-2.6

diff --git a/drivers/char/hvc_xen.c b/drivers/char/hvc_xen.c
index 2413af3..eba999f 100644
--- a/drivers/char/hvc_xen.c
+++ b/drivers/char/hvc_xen.c
@@ -39,9 +39,14 @@ static int xencons_irq;
 
 /* ------------------------------------------------------------------ */
 
+static unsigned long console_pfn = ~0ul;
+
 static inline struct xencons_interface *xencons_interface(void)
 {
-	return mfn_to_virt(xen_start_info->console.domU.mfn);
+	if (console_pfn == ~0ul)
+		return mfn_to_virt(xen_start_info->console.domU.mfn);
+	else
+		return __va(console_pfn << PAGE_SHIFT);
 }
 
 static inline void notify_daemon(void)
@@ -95,26 +100,41 @@ static int read_console(uint32_t vtermno, char *buf, int len)
 static struct hv_ops hvc_ops = {
 	.get_chars = read_console,
 	.put_chars = write_console,
+	.notifier_add = notifier_add_irq,
+	.notifier_del = notifier_del_irq,
+	.notifier_hangup = notifier_hangup_irq,
 };
 
 static int __init xen_init(void)
 {
 	struct hvc_struct *hp;
 
-	if (!is_running_on_xen())
-		return 0;
+	if (!xen_pv_domain() ||
+	    xen_initial_domain() ||
+	    !xen_start_info->console.domU.evtchn)
+		return -ENODEV;
 
 	xencons_irq = bind_evtchn_to_irq(xen_start_info->console.domU.evtchn);
 	if (xencons_irq < 0)
-		xencons_irq = 0 /* NO_IRQ */;
+		xencons_irq = 0; /* NO_IRQ */
+
 	hp = hvc_alloc(HVC_COOKIE, xencons_irq, &hvc_ops, 256);
 	if (IS_ERR(hp))
 		return PTR_ERR(hp);
 
 	hvc = hp;
+
+	console_pfn = mfn_to_pfn(xen_start_info->console.domU.mfn);
+
 	return 0;
 }
 
+void xen_console_resume(void)
+{
+	if (xencons_irq)
+		rebind_evtchn_irq(xen_start_info->console.domU.evtchn, xencons_irq);
+}
+
 static void __exit xen_fini(void)
 {
 	if (hvc)
@@ -123,7 +143,7 @@ static void __exit xen_fini(void)
 
 static int xen_cons_init(void)
 {
-	if (!is_running_on_xen())
+	if (!xen_pv_domain())
 		return 0;
 
 	hvc_instantiate(HVC_COOKIE, 0, &hvc_ops);
@@ -155,6 +175,7 @@ static void xenboot_write_console(struct console *console, const char *string,
 
 	raw_console_write(string, len);
 
+	write_console(0, "(early) ", 8);
 	while (off < len && NULL != (pos = strchr(string+off, '\n'))) {
 		linelen = pos-string+off;
 		if (off + linelen > len)