[Xen-devel] [PATCH v5 08/12] arm/mem_access: Introduce GENMASK_ULL bit operation

[Sergej Proskurin <proskurin@xxxxxxxxxxxxx>]

The current implementation of GENMASK is capable of creating bitmasks of
32-bit values on AArch32 and 64-bit values on AArch64. As we need to
create masks for 64-bit values on AArch32 as well, in this commit we
introduce the GENMASK_ULL bit operation.

Signed-off-by: Sergej Proskurin <proskurin@xxxxxxxxxxxxx>
---
Cc: Stefano Stabellini <sstabellini@xxxxxxxxxx>
Cc: Julien Grall <julien.grall@xxxxxxx>
---
 xen/include/asm-arm/config.h | 2 ++
 xen/include/xen/bitops.h     | 2 ++
 2 files changed, 4 insertions(+)

diff --git a/xen/include/asm-arm/config.h b/xen/include/asm-arm/config.h
index 5b6f3c985d..7fa412f1b1 100644
--- a/xen/include/asm-arm/config.h
+++ b/xen/include/asm-arm/config.h
@@ -19,6 +19,8 @@
 #define BITS_PER_LONG (BYTES_PER_LONG << 3)
 #define POINTER_ALIGN BYTES_PER_LONG
 
+#define BITS_PER_LONG_LONG 64
+
 /* xen_ulong_t is always 64 bits */
 #define BITS_PER_XEN_ULONG 64
 
diff --git a/xen/include/xen/bitops.h b/xen/include/xen/bitops.h
index bd0883ab22..47170c9bfd 100644
--- a/xen/include/xen/bitops.h
+++ b/xen/include/xen/bitops.h
@@ -9,6 +9,8 @@
  */
 #define GENMASK(h, l) \
     (((~0UL) << (l)) & (~0UL >> (BITS_PER_LONG - 1 - (h))))
+#define GENMASK_ULL(h, l) \
+    (((~0ULL) << (l)) & (~0ULL >> (BITS_PER_LONG_LONG - 1 - (h))))
 
 /*
  * ffs: find first bit set. This is defined the same way as
-- 
2.13.1


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