1218 static int subpage_protection(struct mm_struct *mm, unsigned long ea)  in subpage_protection()  argument
1227 	if (ea >= spt->maxaddr)  in subpage_protection()
1229 	if (ea < 0x100000000UL) {  in subpage_protection()
1233 		sbpm = spt->protptrs[ea >> SBP_L3_SHIFT];  in subpage_protection()
1237 	sbpp = sbpm[(ea >> SBP_L2_SHIFT) & (SBP_L2_COUNT - 1)];  in subpage_protection()
1240 	spp = sbpp[(ea >> PAGE_SHIFT) & (SBP_L1_COUNT - 1)];  in subpage_protection()
1243 	spp >>= 30 - 2 * ((ea >> 12) & 0xf);  in subpage_protection()
1256 static inline int subpage_protection(struct mm_struct *mm, unsigned long ea)  in subpage_protection()  argument
1262 void hash_failure_debug(unsigned long ea, unsigned long access,  in hash_failure_debug()  argument
1268 	pr_info("mm: Hashing failure ! EA=0x%lx access=0x%lx current=%s\n",  in hash_failure_debug()
1269 		ea, access, current->comm);  in hash_failure_debug()
1274 static void check_paca_psize(unsigned long ea, struct mm_struct *mm,  in check_paca_psize()  argument
1278 		if (psize != get_paca_psize(ea)) {  in check_paca_psize()
1297 int hash_page_mm(struct mm_struct *mm, unsigned long ea,  in hash_page_mm()  argument
1310 	DBG_LOW("hash_page(ea=%016lx, access=%lx, trap=%lx\n",  in hash_page_mm()
1311 		ea, access, trap);  in hash_page_mm()
1312 	trace_hash_fault(ea, access, trap);  in hash_page_mm()
1315 	switch (get_region_id(ea)) {  in hash_page_mm()
1323 		psize = get_slice_psize(mm, ea);  in hash_page_mm()
1324 		ssize = user_segment_size(ea);  in hash_page_mm()
1325 		vsid = get_user_vsid(&mm->context, ea, ssize);  in hash_page_mm()
1328 		vsid = get_kernel_vsid(ea, mmu_kernel_ssize);  in hash_page_mm()
1334 		vsid = get_kernel_vsid(ea, mmu_kernel_ssize);  in hash_page_mm()
1375 		ea &= ~((1ul << mmu_psize_defs[psize].shift) - 1);  in hash_page_mm()
1379 	ptep = find_linux_pte(pgdir, ea, &is_thp, &hugeshift);  in hash_page_mm()
1408 			rc = __hash_page_thp(ea, access, vsid, (pmd_t *)ptep,  in hash_page_mm()
1412 			rc = __hash_page_huge(ea, access, vsid, ptep, trap,  in hash_page_mm()
1425 			check_paca_psize(ea, mm, psize, user_region);  in hash_page_mm()
1440 		demote_segment_4k(mm, ea);  in hash_page_mm()
1450 			demote_segment_4k(mm, ea);  in hash_page_mm()
1452 		} else if (ea < VMALLOC_END) {  in hash_page_mm()
1469 		check_paca_psize(ea, mm, psize, user_region);  in hash_page_mm()
1473 		rc = __hash_page_64K(ea, access, vsid, ptep, trap,  in hash_page_mm()
1478 		int spp = subpage_protection(mm, ea);  in hash_page_mm()
1482 			rc = __hash_page_4K(ea, access, vsid, ptep, trap,  in hash_page_mm()
1491 		hash_failure_debug(ea, access, vsid, trap, ssize, psize,  in hash_page_mm()
1507 int hash_page(unsigned long ea, unsigned long access, unsigned long trap,  in hash_page()  argument
1513 	if ((get_region_id(ea) == VMALLOC_REGION_ID) ||  in hash_page()
1514 	    (get_region_id(ea) == IO_REGION_ID))  in hash_page()
1520 	return hash_page_mm(mm, ea, access, trap, flags);  in hash_page()
1524 int __hash_page(unsigned long trap, unsigned long ea, unsigned long dsisr,  in __hash_page()  argument
1530 	unsigned int region_id = get_region_id(ea);  in __hash_page()
1555 	return hash_page_mm(mm, ea, access, trap, flags);  in __hash_page()
1559 static bool should_hash_preload(struct mm_struct *mm, unsigned long ea)  in should_hash_preload()  argument
1561 	int psize = get_slice_psize(mm, ea);  in should_hash_preload()
1568 	 * Don't prefault if subpage protection is enabled for the EA.  in should_hash_preload()
1570 	if (unlikely((psize == MMU_PAGE_4K) && subpage_protection(mm, ea)))  in should_hash_preload()
1576 static bool should_hash_preload(struct mm_struct *mm, unsigned long ea)  in should_hash_preload()  argument
1582 static void hash_preload(struct mm_struct *mm, pte_t *ptep, unsigned long ea,  in hash_preload()  argument
1591 	BUG_ON(get_region_id(ea) != USER_REGION_ID);  in hash_preload()
1593 	if (!should_hash_preload(mm, ea))  in hash_preload()
1596 	DBG_LOW("hash_preload(mm=%p, mm->pgdir=%p, ea=%016lx, access=%lx,"  in hash_preload()
1597 		" trap=%lx\n", mm, mm->pgd, ea, access, trap);  in hash_preload()
1605 	ssize = user_segment_size(ea);  in hash_preload()
1606 	vsid = get_user_vsid(&mm->context, ea, ssize);  in hash_preload()
1652 		rc = __hash_page_64K(ea, access, vsid, ptep, trap,  in hash_preload()
1656 		rc = __hash_page_4K(ea, access, vsid, ptep, trap, update_flags,  in hash_preload()
1657 				    ssize, subpage_protection(mm, ea));  in hash_preload()
1663 		hash_failure_debug(ea, access, vsid, trap, ssize,  in hash_preload()