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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>
This commit is contained in:
Ingo Molnar 2008-01-30 13:33:56 +01:00
parent bb5c2dbd57
commit 5508a74896
2 changed files with 7 additions and 11 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

8
arch/x86/mm/pageattr-test.c
View File

@ -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");

10
arch/x86/mm/pageattr_32.c
View File

@ -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);
}