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authorJeremy Fitzhardinge <jeremy@goop.org>2008-05-26 23:30:59 +0100
committerThomas Gleixner <tglx@linutronix.de>2008-05-27 10:11:35 +0200
commit0acf10d8fbd52926217d3933d196b33fe2468f18 (patch)
tree938555cc132ffb6ad3bc242e09dc7497a6040007
parent3843fc2575e3389f4f0ad0420a720240a5746a5d (diff)
xen: add raw console write functions for debug
Add a couple of functions which can write directly to the Xen console for debugging. This output ends up on the host's dom0 console (assuming it allows the domain to write there). Signed-off-by: Jeremy Fitzhardinge <jeremy.fitzhardinge@citrix.com> Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
-rw-r--r--drivers/char/hvc_xen.c26
-rw-r--r--include/xen/hvc-console.h3
2 files changed, 29 insertions, 0 deletions
diff --git a/drivers/char/hvc_xen.c b/drivers/char/hvc_xen.c
index dd68f8541c2..e97d9d16832 100644
--- a/drivers/char/hvc_xen.c
+++ b/drivers/char/hvc_xen.c
@@ -157,3 +157,29 @@ struct console xenboot_console = {
.write = xenboot_write_console,
.flags = CON_PRINTBUFFER | CON_BOOT,
};
+
+void xen_raw_console_write(const char *str)
+{
+ int len = strlen(str);
+
+ while(len > 0) {
+ int rc = HYPERVISOR_console_io(CONSOLEIO_write, len, (char *)str);
+ if (rc <= 0)
+ break;
+
+ str += rc;
+ len -= rc;
+ }
+}
+
+void xen_raw_printk(const char *fmt, ...)
+{
+ static char buf[512];
+ va_list ap;
+
+ va_start(ap, fmt);
+ vsnprintf(buf, sizeof(buf), fmt, ap);
+ va_end(ap);
+
+ xen_raw_console_write(buf);
+}
diff --git a/include/xen/hvc-console.h b/include/xen/hvc-console.h
index 21c0ecfd786..efc3237ab99 100644
--- a/include/xen/hvc-console.h
+++ b/include/xen/hvc-console.h
@@ -3,4 +3,7 @@
extern struct console xenboot_console;
+void xen_raw_console_write(const char *str);
+void xen_raw_printk(const char *fmt, ...);
+
#endif /* XEN_HVC_CONSOLE_H */