Muli Ben-Yehuda
2006-Jun-07 15:22 UTC
[Xen-devel] calling printk early enough kills dom0 boot on x86-64
If I apply the following patch and boot with it on x86-64, dom0 boot hangs in random places. I found it while adding full ioremap support. I suspect an overflow in the console subsystem due to ioremap being called before the console is fuly set up, but did not have time to fully investigate yet. If anyone wants to take a stab at fixing this, please do :-) Cheers, Muli diff -r c191c649cdb3 xen/include/asm-x86/io.h --- a/xen/include/asm-x86/io.h Tue Jun 06 10:25:59 2006 +0100 +++ b/xen/include/asm-x86/io.h Wed Jun 07 18:03:13 2006 +0300 @@ -6,7 +6,14 @@ #include <asm/page.h> /* We don''t need real ioremap() on Xen/x86. */ -#define ioremap(x,l) (__va(x)) +static inline void* ioremap(unsigned long x, unsigned long l) +{ + printk("ieeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeee!\n"); + printk("ieeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeee!\n"); + printk("ieeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeee!\n"); + printk("ieeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeee!\n"); + return __va(x); +} #define readb(x) (*(volatile char *)(x)) #define readw(x) (*(volatile short *)(x)) _______________________________________________ Xen-devel mailing list Xen-devel@lists.xensource.com http://lists.xensource.com/xen-devel