Update Linux to v5.4.2
Change-Id: Idf6911045d9d382da2cfe01b1edff026404ac8fd
diff --git a/lib/ioremap.c b/lib/ioremap.c
index 517f585..0a2ffad 100644
--- a/lib/ioremap.c
+++ b/lib/ioremap.c
@@ -30,6 +30,8 @@
void __init ioremap_huge_init(void)
{
if (!ioremap_huge_disabled) {
+ if (arch_ioremap_p4d_supported())
+ ioremap_p4d_capable = 1;
if (arch_ioremap_pud_supported())
ioremap_pud_capable = 1;
if (arch_ioremap_pmd_supported())
@@ -76,83 +78,132 @@
return 0;
}
+static int ioremap_try_huge_pmd(pmd_t *pmd, unsigned long addr,
+ unsigned long end, phys_addr_t phys_addr,
+ pgprot_t prot)
+{
+ if (!ioremap_pmd_enabled())
+ return 0;
+
+ if ((end - addr) != PMD_SIZE)
+ return 0;
+
+ if (!IS_ALIGNED(addr, PMD_SIZE))
+ return 0;
+
+ if (!IS_ALIGNED(phys_addr, PMD_SIZE))
+ return 0;
+
+ if (pmd_present(*pmd) && !pmd_free_pte_page(pmd, addr))
+ return 0;
+
+ return pmd_set_huge(pmd, phys_addr, prot);
+}
+
static inline int ioremap_pmd_range(pud_t *pud, unsigned long addr,
unsigned long end, phys_addr_t phys_addr, pgprot_t prot)
{
pmd_t *pmd;
unsigned long next;
- phys_addr -= addr;
pmd = pmd_alloc(&init_mm, pud, addr);
if (!pmd)
return -ENOMEM;
do {
next = pmd_addr_end(addr, end);
- if (ioremap_pmd_enabled() &&
- ((next - addr) == PMD_SIZE) &&
- IS_ALIGNED(phys_addr + addr, PMD_SIZE) &&
- pmd_free_pte_page(pmd, addr)) {
- if (pmd_set_huge(pmd, phys_addr + addr, prot))
- continue;
- }
+ if (ioremap_try_huge_pmd(pmd, addr, next, phys_addr, prot))
+ continue;
- if (ioremap_pte_range(pmd, addr, next, phys_addr + addr, prot))
+ if (ioremap_pte_range(pmd, addr, next, phys_addr, prot))
return -ENOMEM;
- } while (pmd++, addr = next, addr != end);
+ } while (pmd++, phys_addr += (next - addr), addr = next, addr != end);
return 0;
}
+static int ioremap_try_huge_pud(pud_t *pud, unsigned long addr,
+ unsigned long end, phys_addr_t phys_addr,
+ pgprot_t prot)
+{
+ if (!ioremap_pud_enabled())
+ return 0;
+
+ if ((end - addr) != PUD_SIZE)
+ return 0;
+
+ if (!IS_ALIGNED(addr, PUD_SIZE))
+ return 0;
+
+ if (!IS_ALIGNED(phys_addr, PUD_SIZE))
+ return 0;
+
+ if (pud_present(*pud) && !pud_free_pmd_page(pud, addr))
+ return 0;
+
+ return pud_set_huge(pud, phys_addr, prot);
+}
+
static inline int ioremap_pud_range(p4d_t *p4d, unsigned long addr,
unsigned long end, phys_addr_t phys_addr, pgprot_t prot)
{
pud_t *pud;
unsigned long next;
- phys_addr -= addr;
pud = pud_alloc(&init_mm, p4d, addr);
if (!pud)
return -ENOMEM;
do {
next = pud_addr_end(addr, end);
- if (ioremap_pud_enabled() &&
- ((next - addr) == PUD_SIZE) &&
- IS_ALIGNED(phys_addr + addr, PUD_SIZE) &&
- pud_free_pmd_page(pud, addr)) {
- if (pud_set_huge(pud, phys_addr + addr, prot))
- continue;
- }
+ if (ioremap_try_huge_pud(pud, addr, next, phys_addr, prot))
+ continue;
- if (ioremap_pmd_range(pud, addr, next, phys_addr + addr, prot))
+ if (ioremap_pmd_range(pud, addr, next, phys_addr, prot))
return -ENOMEM;
- } while (pud++, addr = next, addr != end);
+ } while (pud++, phys_addr += (next - addr), addr = next, addr != end);
return 0;
}
+static int ioremap_try_huge_p4d(p4d_t *p4d, unsigned long addr,
+ unsigned long end, phys_addr_t phys_addr,
+ pgprot_t prot)
+{
+ if (!ioremap_p4d_enabled())
+ return 0;
+
+ if ((end - addr) != P4D_SIZE)
+ return 0;
+
+ if (!IS_ALIGNED(addr, P4D_SIZE))
+ return 0;
+
+ if (!IS_ALIGNED(phys_addr, P4D_SIZE))
+ return 0;
+
+ if (p4d_present(*p4d) && !p4d_free_pud_page(p4d, addr))
+ return 0;
+
+ return p4d_set_huge(p4d, phys_addr, prot);
+}
+
static inline int ioremap_p4d_range(pgd_t *pgd, unsigned long addr,
unsigned long end, phys_addr_t phys_addr, pgprot_t prot)
{
p4d_t *p4d;
unsigned long next;
- phys_addr -= addr;
p4d = p4d_alloc(&init_mm, pgd, addr);
if (!p4d)
return -ENOMEM;
do {
next = p4d_addr_end(addr, end);
- if (ioremap_p4d_enabled() &&
- ((next - addr) == P4D_SIZE) &&
- IS_ALIGNED(phys_addr + addr, P4D_SIZE)) {
- if (p4d_set_huge(p4d, phys_addr + addr, prot))
- continue;
- }
+ if (ioremap_try_huge_p4d(p4d, addr, next, phys_addr, prot))
+ continue;
- if (ioremap_pud_range(p4d, addr, next, phys_addr + addr, prot))
+ if (ioremap_pud_range(p4d, addr, next, phys_addr, prot))
return -ENOMEM;
- } while (p4d++, addr = next, addr != end);
+ } while (p4d++, phys_addr += (next - addr), addr = next, addr != end);
return 0;
}
@@ -168,14 +219,13 @@
BUG_ON(addr >= end);
start = addr;
- phys_addr -= addr;
pgd = pgd_offset_k(addr);
do {
next = pgd_addr_end(addr, end);
- err = ioremap_p4d_range(pgd, addr, next, phys_addr+addr, prot);
+ err = ioremap_p4d_range(pgd, addr, next, phys_addr, prot);
if (err)
break;
- } while (pgd++, addr = next, addr != end);
+ } while (pgd++, phys_addr += (next - addr), addr = next, addr != end);
flush_cache_vmap(start, end);