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    Annotation of /trunk/kernel26-xen/patches-2.6.25-r1/1054-2.6.25-xen-DEBUG-Add-xprintk-to-log-directly-via-hypercall-fo.patch

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    Revision 606 - (hide annotations) (download)
    Thu May 22 23:13:13 2008 UTC (16 years ago) by niro
    File size: 1574 byte(s) 
    -ver bump to 2.6.25-magellan-r1:
- linux-2.6.25.4
- fbcondecor-0.9.4
- squashfs-3.3
- unionfs-2.3.3
- tuxonice-3.0-rc7
- linux-phc-0.3.0
- acpi-dstd-0.9a
- reiser4
- xen-3.2.0
. ipw3945-1.2.2
    1 niro 606 From aa819a503e9dab87d2451996ab75133b2022f871 Mon Sep 17 00:00:00 2001
    2     From: Stephen Tweedie <sct@redhat.com>
    3     Date: Wed, 21 Nov 2007 18:40:31 +0000
    4     Subject: [PATCH] DEBUG: Add xprintk to log directly via hypercall, for early debugging
    5    
    6     Signed-off-by: Stephen Tweedie <sct@redhat.com>
    7     ---
    8     arch/x86/xen/enlighten.c | 31 +++++++++++++++++++++++++++++++
    9     1 files changed, 31 insertions(+), 0 deletions(-)
    10    
    11     diff --git a/arch/x86/xen/enlighten.c b/arch/x86/xen/enlighten.c
    12     index bb97446..b091b1c 100644
    13     --- a/arch/x86/xen/enlighten.c
    14     +++ b/arch/x86/xen/enlighten.c
    15     @@ -137,6 +137,37 @@ static void __init xen_vcpu_setup(int cpu)
    16     }
    17     }
    18    
    19     +static void kcons_write_dom0(const char *s, unsigned int count)
    20     +{
    21     + int rc;
    22     +
    23     + while ((count > 0) &&
    24     + ((rc = HYPERVISOR_console_io(
    25     + CONSOLEIO_write, count, (char *)s)) > 0)) {
    26     + count -= rc;
    27     + s += rc;
    28     + }
    29     +}
    30     +
    31     +
    32     +/*** Useful function for console debugging -- goes straight to Xen. ***/
    33     +asmlinkage int xprintk(const char *fmt, ...)
    34     +{
    35     + va_list args;
    36     + int printk_len;
    37     + static char printk_buf[1024];
    38     +
    39     + /* Emit the output into the temporary buffer */
    40     + va_start(args, fmt);
    41     + printk_len = vsnprintf(printk_buf, sizeof(printk_buf), fmt, args);
    42     + va_end(args);
    43     +
    44     + /* Send the processed output directly to Xen. */
    45     + kcons_write_dom0(printk_buf, printk_len);
    46     +
    47     + return 0;
    48     +}
    49     +
    50     static void __init xen_banner(void)
    51     {
    52     printk(KERN_INFO "Booting paravirtualized kernel on %s\n",
    53     --
    54     1.5.4.1
    55