x86: add PAT related debug prints
Adds debug prints at critical code. Adds enough info in dmesg to allow us to
do effective first round of analysis of any issues that may result due to PAT
patch series.
Signed-off-by: Venkatesh Pallipadi <venkatesh.pallipadi@intel.com>
Signed-off-by: Suresh Siddha <suresh.b.siddha@intel.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
diff --git a/arch/x86/mm/ioremap.c b/arch/x86/mm/ioremap.c
index 51cd395..6cd3418 100644
--- a/arch/x86/mm/ioremap.c
+++ b/arch/x86/mm/ioremap.c
@@ -131,7 +131,7 @@
return NULL;
if (!phys_addr_valid(phys_addr)) {
- printk(KERN_WARNING "ioremap: invalid physical address %lx\n",
+ printk(KERN_WARNING "ioremap: invalid physical address %llx\n",
phys_addr);
WARN_ON_ONCE(1);
return NULL;
@@ -177,6 +177,10 @@
new_prot_val == _PAGE_CACHE_WC)) ||
(prot_val == _PAGE_CACHE_WC &&
new_prot_val == _PAGE_CACHE_WB)) {
+ printk(
+ "ioremap error for 0x%llx-0x%llx, requested 0x%lx, got 0x%lx\n",
+ phys_addr, phys_addr + size,
+ prot_val, new_prot_val);
free_memtype(phys_addr, phys_addr + size);
return NULL;
}
