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Diffstat (limited to 'arch/arm64/kernel/hibernate.c')
-rw-r--r--arch/arm64/kernel/hibernate.c44
1 files changed, 37 insertions, 7 deletions
diff --git a/arch/arm64/kernel/hibernate.c b/arch/arm64/kernel/hibernate.c
index 5b73e92c99e3..a8a4b55f3a09 100644
--- a/arch/arm64/kernel/hibernate.c
+++ b/arch/arm64/kernel/hibernate.c
@@ -184,6 +184,7 @@ static int trans_pgd_map_page(pgd_t *trans_pgd, void *page,
pgprot_t pgprot)
{
pgd_t *pgdp;
+ p4d_t *p4dp;
pud_t *pudp;
pmd_t *pmdp;
pte_t *ptep;
@@ -196,7 +197,15 @@ static int trans_pgd_map_page(pgd_t *trans_pgd, void *page,
pgd_populate(&init_mm, pgdp, pudp);
}
- pudp = pud_offset(pgdp, dst_addr);
+ p4dp = p4d_offset(pgdp, dst_addr);
+ if (p4d_none(READ_ONCE(*p4dp))) {
+ pudp = (void *)get_safe_page(GFP_ATOMIC);
+ if (!pudp)
+ return -ENOMEM;
+ p4d_populate(&init_mm, p4dp, pudp);
+ }
+
+ pudp = pud_offset(p4dp, dst_addr);
if (pud_none(READ_ONCE(*pudp))) {
pmdp = (void *)get_safe_page(GFP_ATOMIC);
if (!pmdp)
@@ -419,7 +428,7 @@ static int copy_pmd(pud_t *dst_pudp, pud_t *src_pudp, unsigned long start,
return 0;
}
-static int copy_pud(pgd_t *dst_pgdp, pgd_t *src_pgdp, unsigned long start,
+static int copy_pud(p4d_t *dst_p4dp, p4d_t *src_p4dp, unsigned long start,
unsigned long end)
{
pud_t *dst_pudp;
@@ -427,15 +436,15 @@ static int copy_pud(pgd_t *dst_pgdp, pgd_t *src_pgdp, unsigned long start,
unsigned long next;
unsigned long addr = start;
- if (pgd_none(READ_ONCE(*dst_pgdp))) {
+ if (p4d_none(READ_ONCE(*dst_p4dp))) {
dst_pudp = (pud_t *)get_safe_page(GFP_ATOMIC);
if (!dst_pudp)
return -ENOMEM;
- pgd_populate(&init_mm, dst_pgdp, dst_pudp);
+ p4d_populate(&init_mm, dst_p4dp, dst_pudp);
}
- dst_pudp = pud_offset(dst_pgdp, start);
+ dst_pudp = pud_offset(dst_p4dp, start);
- src_pudp = pud_offset(src_pgdp, start);
+ src_pudp = pud_offset(src_p4dp, start);
do {
pud_t pud = READ_ONCE(*src_pudp);
@@ -454,6 +463,27 @@ static int copy_pud(pgd_t *dst_pgdp, pgd_t *src_pgdp, unsigned long start,
return 0;
}
+static int copy_p4d(pgd_t *dst_pgdp, pgd_t *src_pgdp, unsigned long start,
+ unsigned long end)
+{
+ p4d_t *dst_p4dp;
+ p4d_t *src_p4dp;
+ unsigned long next;
+ unsigned long addr = start;
+
+ dst_p4dp = p4d_offset(dst_pgdp, start);
+ src_p4dp = p4d_offset(src_pgdp, start);
+ do {
+ next = p4d_addr_end(addr, end);
+ if (p4d_none(READ_ONCE(*src_p4dp)))
+ continue;
+ if (copy_pud(dst_p4dp, src_p4dp, addr, next))
+ return -ENOMEM;
+ } while (dst_p4dp++, src_p4dp++, addr = next, addr != end);
+
+ return 0;
+}
+
static int copy_page_tables(pgd_t *dst_pgdp, unsigned long start,
unsigned long end)
{
@@ -466,7 +496,7 @@ static int copy_page_tables(pgd_t *dst_pgdp, unsigned long start,
next = pgd_addr_end(addr, end);
if (pgd_none(READ_ONCE(*src_pgdp)))
continue;
- if (copy_pud(dst_pgdp, src_pgdp, addr, next))
+ if (copy_p4d(dst_pgdp, src_pgdp, addr, next))
return -ENOMEM;
} while (dst_pgdp++, src_pgdp++, addr = next, addr != end);