From: Joerg Roedel <jroedel@xxxxxxx>
Implement the function to sync changes in vmalloc and ioremap ranges
to all page-tables.
Signed-off-by: Joerg Roedel <jroedel@xxxxxxx>
Acked-by: Andy Lutomirski <luto@xxxxxxxxxx>
---
arch/x86/include/asm/pgtable_64_types.h | 2 ++
arch/x86/mm/init_64.c | 5 +++++
2 files changed, 7 insertions(+)
diff --git a/arch/x86/include/asm/pgtable_64_types.h b/arch/x86/include/asm/pgtable_64_types.h
index 52e5f5f2240d..8f63efb2a2cc 100644
--- a/arch/x86/include/asm/pgtable_64_types.h
+++ b/arch/x86/include/asm/pgtable_64_types.h
@@ -159,4 +159,6 @@ extern unsigned int ptrs_per_p4d;
#define PGD_KERNEL_START ((PAGE_SIZE / 2) / sizeof(pgd_t))
+#define ARCH_PAGE_TABLE_SYNC_MASK (pgtable_l5_enabled() ? PGTBL_PGD_MODIFIED : PGTBL_P4D_MODIFIED)
+
#endif /* _ASM_X86_PGTABLE_64_DEFS_H */
diff --git a/arch/x86/mm/init_64.c b/arch/x86/mm/init_64.c
index 3b289c2f75cd..541af8e5bcd4 100644
--- a/arch/x86/mm/init_64.c
+++ b/arch/x86/mm/init_64.c
@@ -217,6 +217,11 @@ void sync_global_pgds(unsigned long start, unsigned long end)
sync_global_pgds_l4(start, end);
}
+void arch_sync_kernel_mappings(unsigned long start, unsigned long end)
+{
+ sync_global_pgds(start, end);
+}
+
/*
* NOTE: This function is marked __ref because it calls __init function
* (alloc_bootmem_pages). It's safe to do it ONLY when after_bootmem == 0.
--
2.17.1
