x86: cpa self-test fixes

cpa self-test fixes. change_page_attr_addr() was buggy, it
passed in a virtual address as a physical one.

Signed-off-by: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>

2 files changed, 7 insertions, 11 deletions

diff --git a/arch/x86/mm/pageattr-test.c b/arch/x86/mm/pageattr-test.c
index 91e05a26004d..a12dabbd5c33 100644
--- a/arch/x86/mm/pageattr-test.c
+++ b/arch/x86/mm/pageattr-test.c
@@ -106,12 +106,6 @@ static __init int print_split(struct split_state *s)
         return err;
 }
 
-static __init int state_same(struct split_state *a, struct split_state *b)
-{
-        return a->lpg == b->lpg && a->gpg == b->gpg && a->spg == b->spg &&
-                a->exec == b->exec;
-}
-
 static unsigned long __initdata addr[NTEST];
 static unsigned int __initdata len[NTEST];
 
@@ -229,8 +223,6 @@ static __init int exercise_pageattr(void)
         global_flush_tlb();
 
         failed += print_split(&sc);
-        if (!state_same(&sa, &sc))
-                failed++;
 
         if (failed)
                 printk(KERN_ERR "CPA selftests NOT PASSED. Please report.\n");
diff --git a/arch/x86/mm/pageattr_32.c b/arch/x86/mm/pageattr_32.c
index 14c923b3b07f..ad0868bfa374 100644
--- a/arch/x86/mm/pageattr_32.c
+++ b/arch/x86/mm/pageattr_32.c
@@ -79,8 +79,10 @@ split_large_page(pte_t *kpte, unsigned long address, pgprot_t ref_prot)
          * up for us already:
          */
         tmp = lookup_address(address, &level);
-        if (tmp != kpte)
+        if (tmp != kpte) {
+                WARN_ON_ONCE(1);
                 goto out_unlock;
+        }
 
         address = __pa(address);
         addr = address & LARGE_PAGE_MASK;
@@ -181,17 +183,19 @@ EXPORT_SYMBOL(change_page_attr);
 int change_page_attr_addr(unsigned long addr, int numpages, pgprot_t prot)
 {
         int i;
-        unsigned long pfn = (addr >> PAGE_SHIFT);
+        unsigned long pfn = (__pa(addr) >> PAGE_SHIFT);
 
         for (i = 0; i < numpages; i++) {
                 if (!pfn_valid(pfn + i)) {
+                        WARN_ON_ONCE(1);
                         break;
                 } else {
                         int level;
                         pte_t *pte = lookup_address(addr + i*PAGE_SIZE, &level);
-                        BUG_ON(pte && !pte_none(*pte));
+                        BUG_ON(pte && pte_none(*pte));
                 }
         }
+
         return change_page_attr(virt_to_page(addr), i, prot);
 }