Donate to e Foundation | Murena handsets with /e/OS | Own a part of Murena! Learn more

Commit ecc729f1 authored by Peter Zijlstra's avatar Peter Zijlstra Committed by Ingo Molnar
Browse files

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: default avatarPeter 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: default avatarIngo Molnar <mingo@kernel.org>
parent 02117e42

arch/x86/mm/pageattr-test.c

+24 −4
Original line number Diff line number Diff line
@@ -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;

		}



		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++;