Orange Pi5 kernel

^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   1) // SPDX-License-Identifier: GPL-2.0
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   2) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   3)  * self test for change_page_attr.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   4)  *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   5)  * Clears the a test pte bit on random pages in the direct mapping,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   6)  * then reverts and compares page tables forwards and afterwards.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   7)  */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   8) #include <linux/memblock.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   9) #include <linux/kthread.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  10) #include <linux/random.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  11) #include <linux/kernel.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  12) #include <linux/init.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  13) #include <linux/mm.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  14) #include <linux/vmalloc.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  15) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  16) #include <asm/cacheflush.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  17) #include <asm/kdebug.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  18) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  19) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  20)  * Only print the results of the first pass:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  21)  */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  22) static __read_mostly int print = 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  23) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  24) enum {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  25) 	NTEST			= 3 * 100,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  26) 	NPAGES			= 100,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  27) #ifdef CONFIG_X86_64
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  28) 	LPS			= (1 << PMD_SHIFT),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  29) #elif defined(CONFIG_X86_PAE)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  30) 	LPS			= (1 << PMD_SHIFT),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  31) #else
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  32) 	LPS			= (1 << 22),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  33) #endif
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  34) 	GPS			= (1<<30)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  35) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  36) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  37) #define PAGE_CPA_TEST	__pgprot(_PAGE_CPA_TEST)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  38) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  39) static int pte_testbit(pte_t pte)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  40) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  41) 	return pte_flags(pte) & _PAGE_SOFTW1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  42) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  43) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  44) struct split_state {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  45) 	long lpg, gpg, spg, exec;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  46) 	long min_exec, max_exec;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  47) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  48) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  49) static int print_split(struct split_state *s)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  50) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  51) 	long i, expected, missed = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  52) 	int err = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  53) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  54) 	s->lpg = s->gpg = s->spg = s->exec = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  55) 	s->min_exec = ~0UL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  56) 	s->max_exec = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  57) 	for (i = 0; i < max_pfn_mapped; ) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  58) 		unsigned long addr = (unsigned long)__va(i << PAGE_SHIFT);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  59) 		unsigned int level;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  60) 		pte_t *pte;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  61) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  62) 		pte = lookup_address(addr, &level);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  63) 		if (!pte) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  64) 			missed++;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  65) 			i++;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  66) 			continue;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  67) 		}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  68) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  69) 		if (level == PG_LEVEL_1G && sizeof(long) == 8) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  70) 			s->gpg++;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  71) 			i += GPS/PAGE_SIZE;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  72) 		} else if (level == PG_LEVEL_2M) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  73) 			if ((pte_val(*pte) & _PAGE_PRESENT) && !(pte_val(*pte) & _PAGE_PSE)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  74) 				printk(KERN_ERR
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  75) 					"%lx level %d but not PSE %Lx\n",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  76) 					addr, level, (u64)pte_val(*pte));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  77) 				err = 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  78) 			}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  79) 			s->lpg++;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  80) 			i += LPS/PAGE_SIZE;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  81) 		} else {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  82) 			s->spg++;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  83) 			i++;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  84) 		}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  85) 		if (!(pte_val(*pte) & _PAGE_NX)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  86) 			s->exec++;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  87) 			if (addr < s->min_exec)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  88) 				s->min_exec = addr;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  89) 			if (addr > s->max_exec)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  90) 				s->max_exec = addr;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  91) 		}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  92) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  93) 	if (print) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  94) 		printk(KERN_INFO
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  95) 			" 4k %lu large %lu gb %lu x %lu[%lx-%lx] miss %lu\n",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  96) 			s->spg, s->lpg, s->gpg, s->exec,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  97) 			s->min_exec != ~0UL ? s->min_exec : 0,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  98) 			s->max_exec, missed);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  99) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 100) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 101) 	expected = (s->gpg*GPS + s->lpg*LPS)/PAGE_SIZE + s->spg + missed;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 102) 	if (expected != i) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 103) 		printk(KERN_ERR "CPA max_pfn_mapped %lu but expected %lu\n",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 104) 			max_pfn_mapped, expected);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 105) 		return 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 106) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 107) 	return err;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 108) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 109) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 110) static unsigned long addr[NTEST];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 111) static unsigned int len[NTEST];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 112) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 113) static struct page *pages[NPAGES];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 114) static unsigned long addrs[NPAGES];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 115) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 116) /* Change the global bit on random pages in the direct mapping */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 117) static int pageattr_test(void)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 118) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 119) 	struct split_state sa, sb, sc;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 120) 	unsigned long *bm;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 121) 	pte_t *pte, pte0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 122) 	int failed = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 123) 	unsigned int level;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 124) 	int i, k;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 125) 	int err;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 126) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 127) 	if (print)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 128) 		printk(KERN_INFO "CPA self-test:\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 129) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 130) 	bm = vzalloc((max_pfn_mapped + 7) / 8);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 131) 	if (!bm) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 132) 		printk(KERN_ERR "CPA Cannot vmalloc bitmap\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 133) 		return -ENOMEM;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 134) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 135) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 136) 	failed += print_split(&sa);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 137) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 138) 	for (i = 0; i < NTEST; i++) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 139) 		unsigned long pfn = prandom_u32() % max_pfn_mapped;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 140) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 141) 		addr[i] = (unsigned long)__va(pfn << PAGE_SHIFT);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 142) 		len[i] = prandom_u32() % NPAGES;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 143) 		len[i] = min_t(unsigned long, len[i], max_pfn_mapped - pfn - 1);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 144) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 145) 		if (len[i] == 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 146) 			len[i] = 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 147) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 148) 		pte = NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 149) 		pte0 = pfn_pte(0, __pgprot(0)); /* shut gcc up */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 150) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 151) 		for (k = 0; k < len[i]; k++) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 152) 			pte = lookup_address(addr[i] + k*PAGE_SIZE, &level);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 153) 			if (!pte || pgprot_val(pte_pgprot(*pte)) == 0 ||
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 154) 			    !(pte_val(*pte) & _PAGE_PRESENT)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 155) 				addr[i] = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 156) 				break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 157) 			}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 158) 			if (k == 0) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 159) 				pte0 = *pte;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 160) 			} else {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 161) 				if (pgprot_val(pte_pgprot(*pte)) !=
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 162) 					pgprot_val(pte_pgprot(pte0))) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 163) 					len[i] = k;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 164) 					break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 165) 				}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 166) 			}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 167) 			if (test_bit(pfn + k, bm)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 168) 				len[i] = k;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 169) 				break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 170) 			}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 171) 			__set_bit(pfn + k, bm);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 172) 			addrs[k] = addr[i] + k*PAGE_SIZE;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 173) 			pages[k] = pfn_to_page(pfn + k);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 174) 		}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 175) 		if (!addr[i] || !pte || !k) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 176) 			addr[i] = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 177) 			continue;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 178) 		}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 179) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 180) 		switch (i % 3) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 181) 		case 0:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 182) 			err = change_page_attr_set(&addr[i], len[i], PAGE_CPA_TEST, 0);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 183) 			break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 184) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 185) 		case 1:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 186) 			err = change_page_attr_set(addrs, len[1], PAGE_CPA_TEST, 1);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 187) 			break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 188) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 189) 		case 2:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 190) 			err = cpa_set_pages_array(pages, len[i], PAGE_CPA_TEST);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 191) 			break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 192) 		}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 193) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 194) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 195) 		if (err < 0) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 196) 			printk(KERN_ERR "CPA %d failed %d\n", i, err);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 197) 			failed++;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 198) 		}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 199) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 200) 		pte = lookup_address(addr[i], &level);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 201) 		if (!pte || !pte_testbit(*pte) || pte_huge(*pte)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 202) 			printk(KERN_ERR "CPA %lx: bad pte %Lx\n", addr[i],
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 203) 				pte ? (u64)pte_val(*pte) : 0ULL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 204) 			failed++;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 205) 		}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 206) 		if (level != PG_LEVEL_4K) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 207) 			printk(KERN_ERR "CPA %lx: unexpected level %d\n",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 208) 				addr[i], level);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 209) 			failed++;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 210) 		}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 211) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 212) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 213) 	vfree(bm);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 214) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 215) 	failed += print_split(&sb);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 216) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 217) 	for (i = 0; i < NTEST; i++) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 218) 		if (!addr[i])
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 219) 			continue;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 220) 		pte = lookup_address(addr[i], &level);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 221) 		if (!pte) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 222) 			printk(KERN_ERR "CPA lookup of %lx failed\n", addr[i]);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 223) 			failed++;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 224) 			continue;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 225) 		}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 226) 		err = change_page_attr_clear(&addr[i], len[i], PAGE_CPA_TEST, 0);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 227) 		if (err < 0) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 228) 			printk(KERN_ERR "CPA reverting failed: %d\n", err);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 229) 			failed++;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 230) 		}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 231) 		pte = lookup_address(addr[i], &level);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 232) 		if (!pte || pte_testbit(*pte)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 233) 			printk(KERN_ERR "CPA %lx: bad pte after revert %Lx\n",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 234) 				addr[i], pte ? (u64)pte_val(*pte) : 0ULL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 235) 			failed++;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 236) 		}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 237) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 238) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 239) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 240) 	failed += print_split(&sc);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 241) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 242) 	if (failed) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 243) 		WARN(1, KERN_ERR "NOT PASSED. Please report.\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 244) 		return -EINVAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 245) 	} else {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 246) 		if (print)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 247) 			printk(KERN_INFO "ok.\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 248) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 249) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 250) 	return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 251) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 252) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 253) static int do_pageattr_test(void *__unused)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 254) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 255) 	while (!kthread_should_stop()) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 256) 		schedule_timeout_interruptible(HZ*30);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 257) 		if (pageattr_test() < 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 258) 			break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 259) 		if (print)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 260) 			print--;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 261) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 262) 	return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 263) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 264) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 265) static int start_pageattr_test(void)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 266) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 267) 	struct task_struct *p;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 268) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 269) 	p = kthread_create(do_pageattr_test, NULL, "pageattr-test");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 270) 	if (!IS_ERR(p))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 271) 		wake_up_process(p);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 272) 	else
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 273) 		WARN_ON(1);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 274) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 275) 	return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 276) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 277) device_initcall(start_pageattr_test);