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authorKirill A. Shutemov <kirill.shutemov@linux.intel.com>2023-03-12 14:26:00 +0300
committerDave Hansen <dave.hansen@linux.intel.com>2023-03-16 23:08:39 +0300
commit428e106ae1ad4e45d3fd6978a753db475d0d0ec9 (patch)
tree4bbc741cbd795dadc9f7543b8aa219cd3759db25 /arch/sparc/include
parent82721d8b25d76c5a6f4c6cf4ce4e5b33788820a1 (diff)
downloadlinux-428e106ae1ad4e45d3fd6978a753db475d0d0ec9.tar.xz
mm: Introduce untagged_addr_remote()
untagged_addr() removes tags/metadata from the address and brings it to the canonical form. The helper is implemented on arm64 and sparc. Both of them do untagging based on global rules. However, Linear Address Masking (LAM) on x86 introduces per-process settings for untagging. As a result, untagged_addr() is now only suitable for untagging addresses for the current proccess. The new helper untagged_addr_remote() has to be used when the address targets remote process. It requires the mmap lock for target mm to be taken. Signed-off-by: Kirill A. Shutemov <kirill.shutemov@linux.intel.com> Signed-off-by: Dave Hansen <dave.hansen@linux.intel.com> Acked-by: Peter Zijlstra (Intel) <peterz@infradead.org> Tested-by: Alexander Potapenko <glider@google.com> Link: https://lore.kernel.org/all/20230312112612.31869-6-kirill.shutemov%40linux.intel.com
Diffstat (limited to 'arch/sparc/include')
-rw-r--r--arch/sparc/include/asm/uaccess_64.h2
1 files changed, 2 insertions, 0 deletions
diff --git a/arch/sparc/include/asm/uaccess_64.h b/arch/sparc/include/asm/uaccess_64.h
index 94266a5c5b04..b825a5dd0210 100644
--- a/arch/sparc/include/asm/uaccess_64.h
+++ b/arch/sparc/include/asm/uaccess_64.h
@@ -8,8 +8,10 @@
#include <linux/compiler.h>
#include <linux/string.h>
+#include <linux/mm_types.h>
#include <asm/asi.h>
#include <asm/spitfire.h>
+#include <asm/pgtable.h>
#include <asm/processor.h>
#include <asm-generic/access_ok.h>