+ x86-mm-64-implement-arch_sync_kernel_mappings.patch added to -mm tree

[Andrew Morton <akpm@linux-foundation.org>]

The patch titled
     Subject: x86/mm/64: implement arch_sync_kernel_mappings()
has been added to the -mm tree.  Its filename is
     x86-mm-64-implement-arch_sync_kernel_mappings.patch

This patch should soon appear at
    http://ozlabs.org/~akpm/mmots/broken-out/x86-mm-64-implement-arch_sync_kernel_mappings.patch
and later at
    http://ozlabs.org/~akpm/mmotm/broken-out/x86-mm-64-implement-arch_sync_kernel_mappings.patch

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------------------------------------------------------
From: Joerg Roedel <jroedel@suse.de>
Subject: x86/mm/64: implement arch_sync_kernel_mappings()

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

Link: http://lkml.kernel.org/r/20200515140023.25469-5-joro@8bytes.org
Signed-off-by: Joerg Roedel <jroedel@suse.de>
Acked-by: Andy Lutomirski <luto@kernel.org>
Acked-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Cc: Arnd Bergmann <arnd@arndb.de>
Cc: Christoph Hellwig <hch@lst.de>
Cc: Dave Hansen <dave.hansen@linux.intel.com>
Cc: "H . Peter Anvin" <hpa@zytor.com>
Cc: Ingo Molnar <mingo@elte.hu>
Cc: Matthew Wilcox (Oracle) <willy@infradead.org>
Cc: Michal Hocko <mhocko@kernel.org>
Cc: "Rafael J. Wysocki" <rjw@rjwysocki.net>
Cc: Steven Rostedt (VMware) <rostedt@goodmis.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: Vlastimil Babka <vbabka@suse.cz>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
---

 arch/x86/include/asm/pgtable_64_types.h |    2 ++
 arch/x86/mm/init_64.c                   |    5 +++++
 2 files changed, 7 insertions(+)

--- a/arch/x86/include/asm/pgtable_64_types.h~x86-mm-64-implement-arch_sync_kernel_mappings
+++ a/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 */
--- a/arch/x86/mm/init_64.c~x86-mm-64-implement-arch_sync_kernel_mappings
+++ a/arch/x86/mm/init_64.c
@@ -218,6 +218,11 @@ void sync_global_pgds(unsigned long star
 		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.
_

Patches currently in -mm which might be from jroedel@suse.de are

mm-add-functions-to-track-page-directory-modifications.patch
mm-vmalloc-track-which-page-table-levels-were-modified.patch
mm-ioremap-track-which-page-table-levels-were-modified.patch
x86-mm-64-implement-arch_sync_kernel_mappings.patch
x86-mm-32-implement-arch_sync_kernel_mappings.patch
mm-remove-vmalloc_sync_unmappings.patch
x86-mm-remove-vmalloc-faulting.patch