[v3,4/7] x86/mm/64: Implement arch_sync_kernel_mappings()
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Message ID 20200515140023.25469-5-joro@8bytes.org
State New
Headers show
Series
  • mm: Get rid of vmalloc_sync_(un)mappings()
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Commit Message

Joerg Roedel May 15, 2020, 2 p.m. UTC
From: Joerg Roedel <jroedel@suse.de>

Implement the function to sync changes in vmalloc and ioremap ranges
to all page-tables.

Signed-off-by: Joerg Roedel <jroedel@suse.de>
Acked-by: Andy Lutomirski <luto@kernel.org>
---
 arch/x86/include/asm/pgtable_64_types.h | 2 ++
 arch/x86/mm/init_64.c                   | 5 +++++
 2 files changed, 7 insertions(+)

Patch
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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.