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From: Joerg Roedel <joro@8bytes.org>
To: x86@kernel.org
Cc: hpa@zytor.com, Dave Hansen <dave.hansen@linux.intel.com>,
	Andy Lutomirski <luto@kernel.org>,
	Peter Zijlstra <peterz@infradead.org>,
	rjw@rjwysocki.net, Arnd Bergmann <arnd@arndb.de>,
	Andrew Morton <akpm@linux-foundation.org>,
	Steven Rostedt <rostedt@goodmis.org>,
	Vlastimil Babka <vbabka@suse.cz>,
	Michal Hocko <mhocko@kernel.org>,
	Matthew Wilcox <willy@infradead.org>,
	Joerg Roedel <jroedel@suse.de>,
	joro@8bytes.org, linux-kernel@vger.kernel.org,
	linux-acpi@vger.kernel.org, linux-arch@vger.kernel.org,
	linux-mm@kvack.org
Subject: [PATCH v3 4/7] x86/mm/64: Implement arch_sync_kernel_mappings()
Date: Fri, 15 May 2020 16:00:20 +0200
Message-ID: <20200515140023.25469-5-joro@8bytes.org> (raw)
In-Reply-To: <20200515140023.25469-1-joro@8bytes.org>

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(+)

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


  parent reply index

Thread overview: 18+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2020-05-15 14:00 [PATCH v3 0/7] mm: Get rid of vmalloc_sync_(un)mappings() Joerg Roedel
2020-05-15 14:00 ` [PATCH v3 1/7] mm: Add functions to track page directory modifications Joerg Roedel
2020-06-05 10:08   ` Catalin Marinas
2020-06-05 11:46     ` Catalin Marinas
2020-06-06  1:01       ` Andrew Morton
2020-06-06 12:50         ` Catalin Marinas
2020-05-15 14:00 ` [PATCH v3 2/7] mm/vmalloc: Track which page-table levels were modified Joerg Roedel
2020-05-15 20:01   ` Andrew Morton
2020-05-16 12:56     ` Joerg Roedel
2020-05-18 22:18       ` Andrew Morton
2020-05-19 15:25         ` Joerg Roedel
2020-05-25 10:05         ` Joerg Roedel
2020-05-15 14:00 ` [PATCH v3 3/7] mm/ioremap: " Joerg Roedel
2020-05-15 14:00 ` Joerg Roedel [this message]
2020-05-15 14:00 ` [PATCH v3 5/7] x86/mm/32: Implement arch_sync_kernel_mappings() Joerg Roedel
2020-05-15 14:00 ` [PATCH v3 6/7] mm: Remove vmalloc_sync_(un)mappings() Joerg Roedel
2020-05-15 14:00 ` [PATCH v3 7/7] x86/mm: Remove vmalloc faulting Joerg Roedel
2020-05-15 14:16 ` [PATCH v3 0/7] mm: Get rid of vmalloc_sync_(un)mappings() Peter Zijlstra

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