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@xxxxxxx>
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@xxxxxxxxxx
Signed-off-by: Joerg Roedel <jroedel@xxxxxxx>
Acked-by: Andy Lutomirski <luto@xxxxxxxxxx>
Acked-by: Peter Zijlstra (Intel) <peterz@xxxxxxxxxxxxx>
Cc: Arnd Bergmann <arnd@xxxxxxxx>
Cc: Christoph Hellwig <hch@xxxxxx>
Cc: Dave Hansen <dave.hansen@xxxxxxxxxxxxxxx>
Cc: "H . Peter Anvin" <hpa@xxxxxxxxx>
Cc: Ingo Molnar <mingo@xxxxxxx>
Cc: Matthew Wilcox (Oracle) <willy@xxxxxxxxxxxxx>
Cc: Michal Hocko <mhocko@xxxxxxxxxx>
Cc: "Rafael J. Wysocki" <rjw@xxxxxxxxxxxxx>
Cc: Steven Rostedt (VMware) <rostedt@xxxxxxxxxxx>
Cc: Thomas Gleixner <tglx@xxxxxxxxxxxxx>
Cc: Vlastimil Babka <vbabka@xxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
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@xxxxxxx 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
