summaryrefslogtreecommitdiff
path: root/tools/vm
diff options
context:
space:
mode:
authorSteven Price <steven.price@arm.com>2020-04-22 17:25:27 +0300
committerCatalin Marinas <catalin.marinas@arm.com>2020-09-04 14:46:06 +0300
commit4beba9486abd2f86d125271d6946f7c38ed0fe77 (patch)
treeb6077490a328fe217ca4f359ceea847872f3f4cd /tools/vm
parent637ec831ea4f09c7529ac4078399ce4e25b46341 (diff)
downloadlinux-4beba9486abd2f86d125271d6946f7c38ed0fe77.tar.xz
mm: Add PG_arch_2 page flag
For arm64 MTE support it is necessary to be able to mark pages that contain user space visible tags that will need to be saved/restored e.g. when swapped out. To support this add a new arch specific flag (PG_arch_2). This flag is only available on 64-bit architectures due to the limited number of spare page flags on the 32-bit ones. Signed-off-by: Steven Price <steven.price@arm.com> [catalin.marinas@arm.com: use CONFIG_64BIT for guarding this new flag] Signed-off-by: Catalin Marinas <catalin.marinas@arm.com> Cc: Andrew Morton <akpm@linux-foundation.org>
Diffstat (limited to 'tools/vm')
-rw-r--r--tools/vm/page-types.c2
1 files changed, 2 insertions, 0 deletions
diff --git a/tools/vm/page-types.c b/tools/vm/page-types.c
index 58c0eab71bca..0517c744b04e 100644
--- a/tools/vm/page-types.c
+++ b/tools/vm/page-types.c
@@ -78,6 +78,7 @@
#define KPF_ARCH 38
#define KPF_UNCACHED 39
#define KPF_SOFTDIRTY 40
+#define KPF_ARCH_2 41
/* [48-] take some arbitrary free slots for expanding overloaded flags
* not part of kernel API
@@ -135,6 +136,7 @@ static const char * const page_flag_names[] = {
[KPF_ARCH] = "h:arch",
[KPF_UNCACHED] = "c:uncached",
[KPF_SOFTDIRTY] = "f:softdirty",
+ [KPF_ARCH_2] = "H:arch_2",
[KPF_READAHEAD] = "I:readahead",
[KPF_SLOB_FREE] = "P:slob_free",