diff options
author | Jeremy Fitzhardinge <jeremy@goop.org> | 2008-05-26 22:30:59 (GMT) |
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committer | Thomas Gleixner <tglx@linutronix.de> | 2008-05-27 08:11:35 (GMT) |
commit | 0acf10d8fbd52926217d3933d196b33fe2468f18 (patch) | |
tree | 938555cc132ffb6ad3bc242e09dc7497a6040007 /drivers/char/hvc_xen.c | |
parent | 3843fc2575e3389f4f0ad0420a720240a5746a5d (diff) | |
download | linux-0acf10d8fbd52926217d3933d196b33fe2468f18.tar.xz |
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>
Diffstat (limited to 'drivers/char/hvc_xen.c')
-rw-r--r-- | drivers/char/hvc_xen.c | 26 |
1 files changed, 26 insertions, 0 deletions
diff --git a/drivers/char/hvc_xen.c b/drivers/char/hvc_xen.c index dd68f85..e97d9d1 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); +} |