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x86/mm/cpa: Add ARRAY and PAGES_ARRAY selftests

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The current pageattr-test code only uses the regular range interface,
add code that also tests the array and pages interface.

Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Cc: Andy Lutomirski <luto@kernel.org>
Cc: Borislav Petkov <bp@alien8.de>
Cc: Dave Hansen <dave.hansen@linux.intel.com>
Cc: H. Peter Anvin <hpa@zytor.com>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Rik van Riel <riel@surriel.com>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: Tom.StDenis@amd.com
Cc: dave.hansen@intel.com
Link: http://lkml.kernel.org/r/20181203171043.162771364@infradead.org
Signed-off-by: Ingo Molnar <mingo@kernel.org>
This commit is contained in:
Peter Zijlstra 2018-12-03 18:03:45 +01:00 committed by Ingo Molnar
parent 02117e42db
commit ecc729f1f4
1 changed files with 24 additions and 4 deletions
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28
arch/x86/mm/pageattr-test.c
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@ -23,7 +23,8 @@
static __read_mostly int print = 1;
enum {
NTEST = 400,
NTEST = 3 * 100,
NPAGES = 100,
#ifdef CONFIG_X86_64
LPS = (1 << PMD_SHIFT),
#elif defined(CONFIG_X86_PAE)
@ -110,6 +111,9 @@ static int print_split(struct split_state *s)
static unsigned long addr[NTEST];
static unsigned int len[NTEST];
static struct page *pages[NPAGES];
static unsigned long addrs[NPAGES];
/* Change the global bit on random pages in the direct mapping */
static int pageattr_test(void)
{
@ -137,7 +141,7 @@ static int pageattr_test(void)
unsigned long pfn = prandom_u32() % max_pfn_mapped;
addr[i] = (unsigned long)__va(pfn << PAGE_SHIFT);
len[i] = prandom_u32() % 100;
len[i] = prandom_u32() % NPAGES;
len[i] = min_t(unsigned long, len[i], max_pfn_mapped - pfn - 1);
if (len[i] == 0)
@ -167,14 +171,30 @@ static int pageattr_test(void)
break;
}
__set_bit(pfn + k, bm);
addrs[k] = addr[i] + k*PAGE_SIZE;
pages[k] = pfn_to_page(pfn + k);
}
if (!addr[i] || !pte || !k) {
addr[i] = 0;
continue;
}
test_addr = addr[i];
err = change_page_attr_set(&test_addr, len[i], PAGE_CPA_TEST, 0);
switch (i % 3) {
case 0:
test_addr = addr[i];
err = change_page_attr_set(&test_addr, len[i], PAGE_CPA_TEST, 0);
break;
case 1:
err = change_page_attr_set(addrs, len[1], PAGE_CPA_TEST, 1);
break;
case 2:
err = cpa_set_pages_array(pages, len[i], PAGE_CPA_TEST);
break;
}
if (err < 0) {
printk(KERN_ERR "CPA %d failed %d\n", i, err);
failed++;