1 files changed, 74 insertions, 0 deletions
diff --git a/arch/arm64/include/asm/vmalloc.h b/arch/arm64/include/asm/vmalloc.h
new file mode 100644
index 000000000000..4ec1acd3c1b3
--- /dev/null
+++ b/arch/arm64/include/asm/vmalloc.h
@@ -0,0 +1,74 @@
+#ifndef _ASM_ARM64_VMALLOC_H
+#define _ASM_ARM64_VMALLOC_H
+
+#include <asm/page.h>
+#include <asm/pgtable.h>
+
+#ifdef CONFIG_HAVE_ARCH_HUGE_VMAP
+
+#define arch_vmap_pud_supported arch_vmap_pud_supported
+static inline bool arch_vmap_pud_supported(pgprot_t prot)
+{
+	return pud_sect_supported();
+}
+
+#define arch_vmap_pmd_supported arch_vmap_pmd_supported
+static inline bool arch_vmap_pmd_supported(pgprot_t prot)
+{
+	return true;
+}
+
+#define arch_vmap_pte_range_map_size arch_vmap_pte_range_map_size
+static inline unsigned long arch_vmap_pte_range_map_size(unsigned long addr,
+						unsigned long end, u64 pfn,
+						unsigned int max_page_shift)
+{
+	/*
+	 * If the block is at least CONT_PTE_SIZE in size, and is naturally
+	 * aligned in both virtual and physical space, then we can pte-map the
+	 * block using the PTE_CONT bit for more efficient use of the TLB.
+	 */
+	if (max_page_shift < CONT_PTE_SHIFT)
+		return PAGE_SIZE;
+
+	if (end - addr < CONT_PTE_SIZE)
+		return PAGE_SIZE;
+
+	if (!IS_ALIGNED(addr, CONT_PTE_SIZE))
+		return PAGE_SIZE;
+
+	if (!IS_ALIGNED(PFN_PHYS(pfn), CONT_PTE_SIZE))
+		return PAGE_SIZE;
+
+	return CONT_PTE_SIZE;
+}
+
+#define arch_vmap_pte_range_unmap_size arch_vmap_pte_range_unmap_size
+static inline unsigned long arch_vmap_pte_range_unmap_size(unsigned long addr,
+							   pte_t *ptep)
+{
+	/*
+	 * The caller handles alignment so it's sufficient just to check
+	 * PTE_CONT.
+	 */
+	return pte_valid_cont(__ptep_get(ptep)) ? CONT_PTE_SIZE : PAGE_SIZE;
+}
+
+#define arch_vmap_pte_supported_shift arch_vmap_pte_supported_shift
+static inline int arch_vmap_pte_supported_shift(unsigned long size)
+{
+	if (size >= CONT_PTE_SIZE)
+		return CONT_PTE_SHIFT;
+
+	return PAGE_SHIFT;
+}
+
+#endif
+
+#define arch_vmap_pgprot_tagged arch_vmap_pgprot_tagged
+static inline pgprot_t arch_vmap_pgprot_tagged(pgprot_t prot)
+{
+	return pgprot_tagged(prot);
+}
+
+#endif /* _ASM_ARM64_VMALLOC_H */