This adds GENMASK_U128() and __GENMASK_U128() macros using __BITS_PER_U128
and __int128 data types. These macros will be used in providing support for
generating 128 bit masks.
Cc: Yury Norov <yury.norov@xxxxxxxxx>
Cc: Rasmus Villemoes <linux@xxxxxxxxxxxxxxxxxx>
Cc: Arnd Bergmann <arnd@xxxxxxxx>>
Cc: linux-kernel@xxxxxxxxxxxxxxx
Cc: linux-arch@xxxxxxxxxxxxxxx
Signed-off-by: Anshuman Khandual <anshuman.khandual@xxxxxxx>
---
include/linux/bits.h | 2 ++
include/uapi/asm-generic/bitsperlong.h | 4 ++++
include/uapi/linux/bits.h | 4 ++++
include/uapi/linux/const.h | 3 +++
4 files changed, 13 insertions(+)
diff --git a/include/linux/bits.h b/include/linux/bits.h
index 0eb24d21aac2..0a174cce09d2 100644
--- a/include/linux/bits.h
+++ b/include/linux/bits.h
@@ -35,5 +35,7 @@
(GENMASK_INPUT_CHECK(h, l) + __GENMASK(h, l))
#define GENMASK_ULL(h, l) \
(GENMASK_INPUT_CHECK(h, l) + __GENMASK_ULL(h, l))
+#define GENMASK_U128(h, l) \
+ (GENMASK_INPUT_CHECK(h, l) + __GENMASK_U128(h, l))
#endif /* __LINUX_BITS_H */
diff --git a/include/uapi/asm-generic/bitsperlong.h b/include/uapi/asm-generic/bitsperlong.h
index fadb3f857f28..a2c425455b2f 100644
--- a/include/uapi/asm-generic/bitsperlong.h
+++ b/include/uapi/asm-generic/bitsperlong.h
@@ -28,4 +28,8 @@
#define __BITS_PER_LONG_LONG 64
#endif
+#ifndef __BITS_PER_U128
+#define __BITS_PER_U128 128
+#endif
+
#endif /* _UAPI__ASM_GENERIC_BITS_PER_LONG */
diff --git a/include/uapi/linux/bits.h b/include/uapi/linux/bits.h
index 3c2a101986a3..780cf99b8e6e 100644
--- a/include/uapi/linux/bits.h
+++ b/include/uapi/linux/bits.h
@@ -12,4 +12,8 @@
(((~_ULL(0)) - (_ULL(1) << (l)) + 1) & \
(~_ULL(0) >> (__BITS_PER_LONG_LONG - 1 - (h))))
+#define __GENMASK_U128(h, l) \
+ (((~_U128(0)) - (_U128(1) << (l)) + 1) & \
+ (~_U128(0) >> (__BITS_PER_U128 - 1 - (h))))
+
#endif /* _UAPI_LINUX_BITS_H */
diff --git a/include/uapi/linux/const.h b/include/uapi/linux/const.h
index a429381e7ca5..e7d9189e6630 100644
--- a/include/uapi/linux/const.h
+++ b/include/uapi/linux/const.h
@@ -16,14 +16,17 @@
#ifdef __ASSEMBLY__
#define _AC(X,Y) X
#define _AT(T,X) X
+#define _AC128(X) X
#else
#define __AC(X,Y) (X##Y)
#define _AC(X,Y) __AC(X,Y)
#define _AT(T,X) ((T)(X))
+#define _AC128(X) ((unsigned __int128)(X))
#endif
#define _UL(x) (_AC(x, UL))
#define _ULL(x) (_AC(x, ULL))
+#define _U128(x) (_AC128(x))
#define _BITUL(x) (_UL(1) << (x))
#define _BITULL(x) (_ULL(1) << (x))
--
2.30.2
