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Subject[RFC][PATCH 02/10] x86/mm/cpa: Add ARRAY and PAGES_ARRAY selftests
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>
---
arch/x86/mm/pageattr-test.c | 28 ++++++++++++++++++++++++----
1 file changed, 24 insertions(+), 4 deletions(-)

--- a/arch/x86/mm/pageattr-test.c
+++ b/arch/x86/mm/pageattr-test.c
@@ -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_stat
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++;

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