The Qemu should enable bit mask macro like Linux did in the
kernel, the GENMASK(h, l) and GENMASK_ULL(h, l) will set the
bit to 1 from l to h bit in the 32 bit or 64 bit long type.
Signed-off-by: Yang Zhong <yang.zh...@intel.com>
---
include/qemu/bitops.h | 7 +++++++
1 file changed, 7 insertions(+)
diff --git a/include/qemu/bitops.h b/include/qemu/bitops.h
index 3acbf3384c..8678c8dcd5 100644
--- a/include/qemu/bitops.h
+++ b/include/qemu/bitops.h
@@ -18,6 +18,7 @@
#define BITS_PER_BYTE CHAR_BIT
#define BITS_PER_LONG (sizeof (unsigned long) * BITS_PER_BYTE)
+#define BITS_PER_LONG_LONG 64
#define BIT(nr) (1UL << (nr))
#define BIT_ULL(nr) (1ULL << (nr))
@@ -28,6 +29,12 @@
#define MAKE_64BIT_MASK(shift, length) \
(((~0ULL) >> (64 - (length))) << (shift))
+#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))))
+
/**
* set_bit - Set a bit in memory
* @nr: the bit to set
--
2.29.2.334.gfaefdd61ec
