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-rw-r--r--arch/s390/mm/dump_pagetables.c2
-rw-r--r--arch/s390/mm/fault.c29
-rw-r--r--arch/s390/mm/gmap.c30
-rw-r--r--arch/s390/mm/init.c12
-rw-r--r--arch/s390/mm/kasan_init.c93
-rw-r--r--arch/s390/mm/pgalloc.c13
-rw-r--r--arch/s390/mm/vmem.c38
7 files changed, 86 insertions, 131 deletions
diff --git a/arch/s390/mm/dump_pagetables.c b/arch/s390/mm/dump_pagetables.c
index 8f9ff7e7187d..e40a30647d99 100644
--- a/arch/s390/mm/dump_pagetables.c
+++ b/arch/s390/mm/dump_pagetables.c
@@ -255,7 +255,7 @@ static int pt_dump_init(void)
*/
max_addr = (S390_lowcore.kernel_asce & _REGION_ENTRY_TYPE_MASK) >> 2;
max_addr = 1UL << (max_addr * 11 + 31);
- address_markers[IDENTITY_AFTER_END_NR].start_address = memory_end;
+ address_markers[IDENTITY_AFTER_END_NR].start_address = ident_map_size;
address_markers[MODULES_NR].start_address = MODULES_VADDR;
address_markers[MODULES_END_NR].start_address = MODULES_END;
address_markers[VMEMMAP_NR].start_address = (unsigned long) vmemmap;
diff --git a/arch/s390/mm/fault.c b/arch/s390/mm/fault.c
index 996884dcc9fd..b8210103de14 100644
--- a/arch/s390/mm/fault.c
+++ b/arch/s390/mm/fault.c
@@ -53,7 +53,6 @@
enum fault_type {
KERNEL_FAULT,
USER_FAULT,
- VDSO_FAULT,
GMAP_FAULT,
};
@@ -77,22 +76,16 @@ static enum fault_type get_fault_type(struct pt_regs *regs)
trans_exc_code = regs->int_parm_long & 3;
if (likely(trans_exc_code == 0)) {
/* primary space exception */
- if (IS_ENABLED(CONFIG_PGSTE) &&
- test_pt_regs_flag(regs, PIF_GUEST_FAULT))
- return GMAP_FAULT;
- if (current->thread.mm_segment == USER_DS)
+ if (user_mode(regs))
return USER_FAULT;
- return KERNEL_FAULT;
- }
- if (trans_exc_code == 2) {
- /* secondary space exception */
- if (current->thread.mm_segment & 1) {
- if (current->thread.mm_segment == USER_DS_SACF)
- return USER_FAULT;
+ if (!IS_ENABLED(CONFIG_PGSTE))
return KERNEL_FAULT;
- }
- return VDSO_FAULT;
+ if (test_pt_regs_flag(regs, PIF_GUEST_FAULT))
+ return GMAP_FAULT;
+ return KERNEL_FAULT;
}
+ if (trans_exc_code == 2)
+ return USER_FAULT;
if (trans_exc_code == 1) {
/* access register mode, not used in the kernel */
return USER_FAULT;
@@ -188,10 +181,6 @@ static void dump_fault_info(struct pt_regs *regs)
asce = S390_lowcore.user_asce;
pr_cont("user ");
break;
- case VDSO_FAULT:
- asce = S390_lowcore.vdso_asce;
- pr_cont("vdso ");
- break;
case GMAP_FAULT:
asce = ((struct gmap *) S390_lowcore.gmap)->asce;
pr_cont("gmap ");
@@ -414,9 +403,6 @@ static inline vm_fault_t do_exception(struct pt_regs *regs, int access)
switch (type) {
case KERNEL_FAULT:
goto out;
- case VDSO_FAULT:
- fault = VM_FAULT_BADMAP;
- goto out;
case USER_FAULT:
case GMAP_FAULT:
if (faulthandler_disabled() || !mm)
@@ -834,7 +820,6 @@ void do_secure_storage_access(struct pt_regs *regs)
if (rc)
BUG();
break;
- case VDSO_FAULT:
case GMAP_FAULT:
default:
do_fault_error(regs, VM_READ | VM_WRITE, VM_FAULT_BADMAP);
diff --git a/arch/s390/mm/gmap.c b/arch/s390/mm/gmap.c
index 64795d034926..9bb2c7512cd5 100644
--- a/arch/s390/mm/gmap.c
+++ b/arch/s390/mm/gmap.c
@@ -2,7 +2,7 @@
/*
* KVM guest address space mapping code
*
- * Copyright IBM Corp. 2007, 2016, 2018
+ * Copyright IBM Corp. 2007, 2020
* Author(s): Martin Schwidefsky <schwidefsky@de.ibm.com>
* David Hildenbrand <david@redhat.com>
* Janosch Frank <frankja@linux.vnet.ibm.com>
@@ -56,19 +56,19 @@ static struct gmap *gmap_alloc(unsigned long limit)
atype = _ASCE_TYPE_REGION1;
etype = _REGION1_ENTRY_EMPTY;
}
- gmap = kzalloc(sizeof(struct gmap), GFP_KERNEL);
+ gmap = kzalloc(sizeof(struct gmap), GFP_KERNEL_ACCOUNT);
if (!gmap)
goto out;
INIT_LIST_HEAD(&gmap->crst_list);
INIT_LIST_HEAD(&gmap->children);
INIT_LIST_HEAD(&gmap->pt_list);
- INIT_RADIX_TREE(&gmap->guest_to_host, GFP_KERNEL);
- INIT_RADIX_TREE(&gmap->host_to_guest, GFP_ATOMIC);
- INIT_RADIX_TREE(&gmap->host_to_rmap, GFP_ATOMIC);
+ INIT_RADIX_TREE(&gmap->guest_to_host, GFP_KERNEL_ACCOUNT);
+ INIT_RADIX_TREE(&gmap->host_to_guest, GFP_ATOMIC | __GFP_ACCOUNT);
+ INIT_RADIX_TREE(&gmap->host_to_rmap, GFP_ATOMIC | __GFP_ACCOUNT);
spin_lock_init(&gmap->guest_table_lock);
spin_lock_init(&gmap->shadow_lock);
refcount_set(&gmap->ref_count, 1);
- page = alloc_pages(GFP_KERNEL, CRST_ALLOC_ORDER);
+ page = alloc_pages(GFP_KERNEL_ACCOUNT, CRST_ALLOC_ORDER);
if (!page)
goto out_free;
page->index = 0;
@@ -309,7 +309,7 @@ static int gmap_alloc_table(struct gmap *gmap, unsigned long *table,
unsigned long *new;
/* since we dont free the gmap table until gmap_free we can unlock */
- page = alloc_pages(GFP_KERNEL, CRST_ALLOC_ORDER);
+ page = alloc_pages(GFP_KERNEL_ACCOUNT, CRST_ALLOC_ORDER);
if (!page)
return -ENOMEM;
new = (unsigned long *) page_to_phys(page);
@@ -594,7 +594,7 @@ int __gmap_link(struct gmap *gmap, unsigned long gaddr, unsigned long vmaddr)
if (pmd_large(*pmd) && !gmap->mm->context.allow_gmap_hpage_1m)
return -EFAULT;
/* Link gmap segment table entry location to page table. */
- rc = radix_tree_preload(GFP_KERNEL);
+ rc = radix_tree_preload(GFP_KERNEL_ACCOUNT);
if (rc)
return rc;
ptl = pmd_lock(mm, pmd);
@@ -1218,11 +1218,11 @@ static int gmap_protect_rmap(struct gmap *sg, unsigned long raddr,
vmaddr = __gmap_translate(parent, paddr);
if (IS_ERR_VALUE(vmaddr))
return vmaddr;
- rmap = kzalloc(sizeof(*rmap), GFP_KERNEL);
+ rmap = kzalloc(sizeof(*rmap), GFP_KERNEL_ACCOUNT);
if (!rmap)
return -ENOMEM;
rmap->raddr = raddr;
- rc = radix_tree_preload(GFP_KERNEL);
+ rc = radix_tree_preload(GFP_KERNEL_ACCOUNT);
if (rc) {
kfree(rmap);
return rc;
@@ -1741,7 +1741,7 @@ int gmap_shadow_r2t(struct gmap *sg, unsigned long saddr, unsigned long r2t,
BUG_ON(!gmap_is_shadow(sg));
/* Allocate a shadow region second table */
- page = alloc_pages(GFP_KERNEL, CRST_ALLOC_ORDER);
+ page = alloc_pages(GFP_KERNEL_ACCOUNT, CRST_ALLOC_ORDER);
if (!page)
return -ENOMEM;
page->index = r2t & _REGION_ENTRY_ORIGIN;
@@ -1825,7 +1825,7 @@ int gmap_shadow_r3t(struct gmap *sg, unsigned long saddr, unsigned long r3t,
BUG_ON(!gmap_is_shadow(sg));
/* Allocate a shadow region second table */
- page = alloc_pages(GFP_KERNEL, CRST_ALLOC_ORDER);
+ page = alloc_pages(GFP_KERNEL_ACCOUNT, CRST_ALLOC_ORDER);
if (!page)
return -ENOMEM;
page->index = r3t & _REGION_ENTRY_ORIGIN;
@@ -1909,7 +1909,7 @@ int gmap_shadow_sgt(struct gmap *sg, unsigned long saddr, unsigned long sgt,
BUG_ON(!gmap_is_shadow(sg) || (sgt & _REGION3_ENTRY_LARGE));
/* Allocate a shadow segment table */
- page = alloc_pages(GFP_KERNEL, CRST_ALLOC_ORDER);
+ page = alloc_pages(GFP_KERNEL_ACCOUNT, CRST_ALLOC_ORDER);
if (!page)
return -ENOMEM;
page->index = sgt & _REGION_ENTRY_ORIGIN;
@@ -2116,7 +2116,7 @@ int gmap_shadow_page(struct gmap *sg, unsigned long saddr, pte_t pte)
parent = sg->parent;
prot = (pte_val(pte) & _PAGE_PROTECT) ? PROT_READ : PROT_WRITE;
- rmap = kzalloc(sizeof(*rmap), GFP_KERNEL);
+ rmap = kzalloc(sizeof(*rmap), GFP_KERNEL_ACCOUNT);
if (!rmap)
return -ENOMEM;
rmap->raddr = (saddr & PAGE_MASK) | _SHADOW_RMAP_PGTABLE;
@@ -2128,7 +2128,7 @@ int gmap_shadow_page(struct gmap *sg, unsigned long saddr, pte_t pte)
rc = vmaddr;
break;
}
- rc = radix_tree_preload(GFP_KERNEL);
+ rc = radix_tree_preload(GFP_KERNEL_ACCOUNT);
if (rc)
break;
rc = -EAGAIN;
diff --git a/arch/s390/mm/init.c b/arch/s390/mm/init.c
index 77767850d0d0..73a163065b95 100644
--- a/arch/s390/mm/init.c
+++ b/arch/s390/mm/init.c
@@ -49,6 +49,9 @@
#include <linux/virtio_config.h>
pgd_t swapper_pg_dir[PTRS_PER_PGD] __section(".bss..swapper_pg_dir");
+static pgd_t invalid_pg_dir[PTRS_PER_PGD] __section(".bss..invalid_pg_dir");
+
+unsigned long s390_invalid_asce;
unsigned long empty_zero_page, zero_page_mask;
EXPORT_SYMBOL(empty_zero_page);
@@ -92,6 +95,9 @@ void __init paging_init(void)
unsigned long pgd_type, asce_bits;
psw_t psw;
+ s390_invalid_asce = (unsigned long)invalid_pg_dir;
+ s390_invalid_asce |= _ASCE_TYPE_REGION3 | _ASCE_TABLE_LENGTH;
+ crst_table_init((unsigned long *)invalid_pg_dir, _REGION3_ENTRY_EMPTY);
init_mm.pgd = swapper_pg_dir;
if (VMALLOC_END > _REGION2_SIZE) {
asce_bits = _ASCE_TYPE_REGION2 | _ASCE_TABLE_LENGTH;
@@ -102,14 +108,14 @@ void __init paging_init(void)
}
init_mm.context.asce = (__pa(init_mm.pgd) & PAGE_MASK) | asce_bits;
S390_lowcore.kernel_asce = init_mm.context.asce;
- S390_lowcore.user_asce = S390_lowcore.kernel_asce;
+ S390_lowcore.user_asce = s390_invalid_asce;
crst_table_init((unsigned long *) init_mm.pgd, pgd_type);
vmem_map_init();
- kasan_copy_shadow(init_mm.pgd);
+ kasan_copy_shadow_mapping();
/* enable virtual mapping in kernel mode */
__ctl_load(S390_lowcore.kernel_asce, 1, 1);
- __ctl_load(S390_lowcore.kernel_asce, 7, 7);
+ __ctl_load(S390_lowcore.user_asce, 7, 7);
__ctl_load(S390_lowcore.kernel_asce, 13, 13);
psw.mask = __extract_psw();
psw_bits(psw).dat = 1;
diff --git a/arch/s390/mm/kasan_init.c b/arch/s390/mm/kasan_init.c
index 5646b39c728a..db4d303aaaa9 100644
--- a/arch/s390/mm/kasan_init.c
+++ b/arch/s390/mm/kasan_init.c
@@ -87,7 +87,7 @@ enum populate_mode {
POPULATE_ZERO_SHADOW,
POPULATE_SHALLOW
};
-static void __init kasan_early_vmemmap_populate(unsigned long address,
+static void __init kasan_early_pgtable_populate(unsigned long address,
unsigned long end,
enum populate_mode mode)
{
@@ -123,8 +123,7 @@ static void __init kasan_early_vmemmap_populate(unsigned long address,
pgd_populate(&init_mm, pg_dir, p4_dir);
}
- if (IS_ENABLED(CONFIG_KASAN_S390_4_LEVEL_PAGING) &&
- mode == POPULATE_SHALLOW) {
+ if (mode == POPULATE_SHALLOW) {
address = (address + P4D_SIZE) & P4D_MASK;
continue;
}
@@ -143,12 +142,6 @@ static void __init kasan_early_vmemmap_populate(unsigned long address,
p4d_populate(&init_mm, p4_dir, pu_dir);
}
- if (!IS_ENABLED(CONFIG_KASAN_S390_4_LEVEL_PAGING) &&
- mode == POPULATE_SHALLOW) {
- address = (address + PUD_SIZE) & PUD_MASK;
- continue;
- }
-
pu_dir = pud_offset(p4_dir, address);
if (pud_none(*pu_dir)) {
if (mode == POPULATE_ZERO_SHADOW &&
@@ -281,7 +274,6 @@ void __init kasan_early_init(void)
unsigned long shadow_alloc_size;
unsigned long vmax_unlimited;
unsigned long initrd_end;
- unsigned long asce_type;
unsigned long memsize;
unsigned long pgt_prot = pgprot_val(PAGE_KERNEL_RO);
pte_t pte_z;
@@ -297,32 +289,26 @@ void __init kasan_early_init(void)
memsize = get_mem_detect_end();
if (!memsize)
kasan_early_panic("cannot detect physical memory size\n");
- /* respect mem= cmdline parameter */
- if (memory_end_set && memsize > memory_end)
- memsize = memory_end;
- if (IS_ENABLED(CONFIG_CRASH_DUMP) && OLDMEM_BASE)
- memsize = min(memsize, OLDMEM_SIZE);
- memsize = min(memsize, KASAN_SHADOW_START);
-
- if (IS_ENABLED(CONFIG_KASAN_S390_4_LEVEL_PAGING)) {
- /* 4 level paging */
- BUILD_BUG_ON(!IS_ALIGNED(KASAN_SHADOW_START, P4D_SIZE));
- BUILD_BUG_ON(!IS_ALIGNED(KASAN_SHADOW_END, P4D_SIZE));
- crst_table_init((unsigned long *)early_pg_dir,
- _REGION2_ENTRY_EMPTY);
- untracked_mem_end = kasan_vmax = vmax_unlimited = _REGION1_SIZE;
- if (has_uv_sec_stor_limit())
- kasan_vmax = min(vmax_unlimited, uv_info.max_sec_stor_addr);
- asce_type = _ASCE_TYPE_REGION2;
- } else {
- /* 3 level paging */
- BUILD_BUG_ON(!IS_ALIGNED(KASAN_SHADOW_START, PUD_SIZE));
- BUILD_BUG_ON(!IS_ALIGNED(KASAN_SHADOW_END, PUD_SIZE));
- crst_table_init((unsigned long *)early_pg_dir,
- _REGION3_ENTRY_EMPTY);
- untracked_mem_end = kasan_vmax = vmax_unlimited = _REGION2_SIZE;
- asce_type = _ASCE_TYPE_REGION3;
- }
+ /*
+ * Kasan currently supports standby memory but only if it follows
+ * online memory (default allocation), i.e. no memory holes.
+ * - memsize represents end of online memory
+ * - ident_map_size represents online + standby and memory limits
+ * accounted.
+ * Kasan maps "memsize" right away.
+ * [0, memsize] - as identity mapping
+ * [__sha(0), __sha(memsize)] - shadow memory for identity mapping
+ * The rest [memsize, ident_map_size] if memsize < ident_map_size
+ * could be mapped/unmapped dynamically later during memory hotplug.
+ */
+ memsize = min(memsize, ident_map_size);
+
+ BUILD_BUG_ON(!IS_ALIGNED(KASAN_SHADOW_START, P4D_SIZE));
+ BUILD_BUG_ON(!IS_ALIGNED(KASAN_SHADOW_END, P4D_SIZE));
+ crst_table_init((unsigned long *)early_pg_dir, _REGION2_ENTRY_EMPTY);
+ untracked_mem_end = kasan_vmax = vmax_unlimited = _REGION1_SIZE;
+ if (has_uv_sec_stor_limit())
+ kasan_vmax = min(vmax_unlimited, uv_info.max_sec_stor_addr);
/* init kasan zero shadow */
crst_table_init((unsigned long *)kasan_early_shadow_p4d,
@@ -388,27 +374,25 @@ void __init kasan_early_init(void)
* +-----------------+ +- shadow end ---+
*/
/* populate kasan shadow (for identity mapping and zero page mapping) */
- kasan_early_vmemmap_populate(__sha(0), __sha(memsize), POPULATE_MAP);
+ kasan_early_pgtable_populate(__sha(0), __sha(memsize), POPULATE_MAP);
if (IS_ENABLED(CONFIG_MODULES))
untracked_mem_end = kasan_vmax - MODULES_LEN;
if (IS_ENABLED(CONFIG_KASAN_VMALLOC)) {
untracked_mem_end = kasan_vmax - vmalloc_size - MODULES_LEN;
/* shallowly populate kasan shadow for vmalloc and modules */
- kasan_early_vmemmap_populate(__sha(untracked_mem_end),
- __sha(kasan_vmax), POPULATE_SHALLOW);
+ kasan_early_pgtable_populate(__sha(untracked_mem_end), __sha(kasan_vmax),
+ POPULATE_SHALLOW);
}
/* populate kasan shadow for untracked memory */
- kasan_early_vmemmap_populate(__sha(max_physmem_end),
- __sha(untracked_mem_end),
+ kasan_early_pgtable_populate(__sha(ident_map_size), __sha(untracked_mem_end),
POPULATE_ZERO_SHADOW);
- kasan_early_vmemmap_populate(__sha(kasan_vmax),
- __sha(vmax_unlimited),
+ kasan_early_pgtable_populate(__sha(kasan_vmax), __sha(vmax_unlimited),
POPULATE_ZERO_SHADOW);
/* memory allocated for identity mapping structs will be freed later */
pgalloc_freeable = pgalloc_pos;
/* populate identity mapping */
- kasan_early_vmemmap_populate(0, memsize, POPULATE_ONE2ONE);
- kasan_set_pgd(early_pg_dir, asce_type);
+ kasan_early_pgtable_populate(0, memsize, POPULATE_ONE2ONE);
+ kasan_set_pgd(early_pg_dir, _ASCE_TYPE_REGION2);
kasan_enable_dat();
/* enable kasan */
init_task.kasan_depth = 0;
@@ -416,7 +400,7 @@ void __init kasan_early_init(void)
sclp_early_printk("KernelAddressSanitizer initialized\n");
}
-void __init kasan_copy_shadow(pgd_t *pg_dir)
+void __init kasan_copy_shadow_mapping(void)
{
/*
* At this point we are still running on early pages setup early_pg_dir,
@@ -428,24 +412,13 @@ void __init kasan_copy_shadow(pgd_t *pg_dir)
pgd_t *pg_dir_dst;
p4d_t *p4_dir_src;
p4d_t *p4_dir_dst;
- pud_t *pu_dir_src;
- pud_t *pu_dir_dst;
pg_dir_src = pgd_offset_raw(early_pg_dir, KASAN_SHADOW_START);
- pg_dir_dst = pgd_offset_raw(pg_dir, KASAN_SHADOW_START);
+ pg_dir_dst = pgd_offset_raw(init_mm.pgd, KASAN_SHADOW_START);
p4_dir_src = p4d_offset(pg_dir_src, KASAN_SHADOW_START);
p4_dir_dst = p4d_offset(pg_dir_dst, KASAN_SHADOW_START);
- if (!p4d_folded(*p4_dir_src)) {
- /* 4 level paging */
- memcpy(p4_dir_dst, p4_dir_src,
- (KASAN_SHADOW_SIZE >> P4D_SHIFT) * sizeof(p4d_t));
- return;
- }
- /* 3 level paging */
- pu_dir_src = pud_offset(p4_dir_src, KASAN_SHADOW_START);
- pu_dir_dst = pud_offset(p4_dir_dst, KASAN_SHADOW_START);
- memcpy(pu_dir_dst, pu_dir_src,
- (KASAN_SHADOW_SIZE >> PUD_SHIFT) * sizeof(pud_t));
+ memcpy(p4_dir_dst, p4_dir_src,
+ (KASAN_SHADOW_SIZE >> P4D_SHIFT) * sizeof(p4d_t));
}
void __init kasan_free_early_identity(void)
diff --git a/arch/s390/mm/pgalloc.c b/arch/s390/mm/pgalloc.c
index 11d2c8395e2a..4e87c819ddea 100644
--- a/arch/s390/mm/pgalloc.c
+++ b/arch/s390/mm/pgalloc.c
@@ -70,19 +70,10 @@ static void __crst_table_upgrade(void *arg)
{
struct mm_struct *mm = arg;
- /* we must change all active ASCEs to avoid the creation of new TLBs */
+ /* change all active ASCEs to avoid the creation of new TLBs */
if (current->active_mm == mm) {
S390_lowcore.user_asce = mm->context.asce;
- if (current->thread.mm_segment == USER_DS) {
- __ctl_load(S390_lowcore.user_asce, 1, 1);
- /* Mark user-ASCE present in CR1 */
- clear_cpu_flag(CIF_ASCE_PRIMARY);
- }
- if (current->thread.mm_segment == USER_DS_SACF) {
- __ctl_load(S390_lowcore.user_asce, 7, 7);
- /* enable_sacf_uaccess does all or nothing */
- WARN_ON(!test_cpu_flag(CIF_ASCE_SECONDARY));
- }
+ __ctl_load(S390_lowcore.user_asce, 7, 7);
}
__tlb_flush_local();
}
diff --git a/arch/s390/mm/vmem.c b/arch/s390/mm/vmem.c
index b239f2ba93b0..01f3a5f58e64 100644
--- a/arch/s390/mm/vmem.c
+++ b/arch/s390/mm/vmem.c
@@ -76,20 +76,20 @@ static void vmem_pte_free(unsigned long *table)
/*
* The unused vmemmap range, which was not yet memset(PAGE_UNUSED) ranges
- * from unused_pmd_start to next PMD_SIZE boundary.
+ * from unused_sub_pmd_start to next PMD_SIZE boundary.
*/
-static unsigned long unused_pmd_start;
+static unsigned long unused_sub_pmd_start;
-static void vmemmap_flush_unused_pmd(void)
+static void vmemmap_flush_unused_sub_pmd(void)
{
- if (!unused_pmd_start)
+ if (!unused_sub_pmd_start)
return;
- memset(__va(unused_pmd_start), PAGE_UNUSED,
- ALIGN(unused_pmd_start, PMD_SIZE) - unused_pmd_start);
- unused_pmd_start = 0;
+ memset(__va(unused_sub_pmd_start), PAGE_UNUSED,
+ ALIGN(unused_sub_pmd_start, PMD_SIZE) - unused_sub_pmd_start);
+ unused_sub_pmd_start = 0;
}
-static void __vmemmap_use_sub_pmd(unsigned long start, unsigned long end)
+static void vmemmap_mark_sub_pmd_used(unsigned long start, unsigned long end)
{
/*
* As we expect to add in the same granularity as we remove, it's
@@ -106,24 +106,24 @@ static void vmemmap_use_sub_pmd(unsigned long start, unsigned long end)
* We only optimize if the new used range directly follows the
* previously unused range (esp., when populating consecutive sections).
*/
- if (unused_pmd_start == start) {
- unused_pmd_start = end;
- if (likely(IS_ALIGNED(unused_pmd_start, PMD_SIZE)))
- unused_pmd_start = 0;
+ if (unused_sub_pmd_start == start) {
+ unused_sub_pmd_start = end;
+ if (likely(IS_ALIGNED(unused_sub_pmd_start, PMD_SIZE)))
+ unused_sub_pmd_start = 0;
return;
}
- vmemmap_flush_unused_pmd();
- __vmemmap_use_sub_pmd(start, end);
+ vmemmap_flush_unused_sub_pmd();
+ vmemmap_mark_sub_pmd_used(start, end);
}
static void vmemmap_use_new_sub_pmd(unsigned long start, unsigned long end)
{
void *page = __va(ALIGN_DOWN(start, PMD_SIZE));
- vmemmap_flush_unused_pmd();
+ vmemmap_flush_unused_sub_pmd();
/* Could be our memmap page is filled with PAGE_UNUSED already ... */
- __vmemmap_use_sub_pmd(start, end);
+ vmemmap_mark_sub_pmd_used(start, end);
/* Mark the unused parts of the new memmap page PAGE_UNUSED. */
if (!IS_ALIGNED(start, PMD_SIZE))
@@ -134,7 +134,7 @@ static void vmemmap_use_new_sub_pmd(unsigned long start, unsigned long end)
* unused range in the populated PMD.
*/
if (!IS_ALIGNED(end, PMD_SIZE))
- unused_pmd_start = end;
+ unused_sub_pmd_start = end;
}
/* Returns true if the PMD is completely unused and can be freed. */
@@ -142,7 +142,7 @@ static bool vmemmap_unuse_sub_pmd(unsigned long start, unsigned long end)
{
void *page = __va(ALIGN_DOWN(start, PMD_SIZE));
- vmemmap_flush_unused_pmd();
+ vmemmap_flush_unused_sub_pmd();
memset(__va(start), PAGE_UNUSED, end - start);
return !memchr_inv(page, PAGE_UNUSED, PMD_SIZE);
}
@@ -223,7 +223,7 @@ static int __ref modify_pmd_table(pud_t *pud, unsigned long addr,
if (!add) {
if (pmd_none(*pmd))
continue;
- if (pmd_large(*pmd) && !add) {
+ if (pmd_large(*pmd)) {
if (IS_ALIGNED(addr, PMD_SIZE) &&
IS_ALIGNED(next, PMD_SIZE)) {
if (!direct)
generated by cgit v1.2.3 (git 2.25.1) at 2024-07-08 21:37:17 +0000