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[kvm-unit-tests,v8,05/14] libcflat: add IS_ALIGNED() macro, and page sizes

Message ID 1481512100-10380-6-git-send-email-peterx@redhat.com (mailing list archive)
State New, archived
Headers show

Commit Message

Peter Xu Dec. 12, 2016, 3:08 a.m. UTC 
These macros will be useful to do page alignment checks.

Reviewed-by: Andrew Jones <drjones@redhat.com>
Signed-off-by: Peter Xu <peterx@redhat.com>
---
 lib/libcflat.h | 6 ++++++
 1 file changed, 6 insertions(+)
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Patch

diff --git a/lib/libcflat.h b/lib/libcflat.h
index 8455c3d..88b10e2 100644
--- a/lib/libcflat.h
+++ b/lib/libcflat.h
@@ -33,6 +33,12 @@ 
 #define __ALIGN_MASK(x, mask)	(((x) + (mask)) & ~(mask))
 #define __ALIGN(x, a)		__ALIGN_MASK(x, (typeof(x))(a) - 1)
 #define ALIGN(x, a)		__ALIGN((x), (a))
+#define IS_ALIGNED(x, a)	(((x) & ((typeof(x))(a) - 1)) == 0)
+
+#define SZ_4K                  (1 << 12)
+#define SZ_64K                 (1 << 16)
+#define SZ_2M                  (1 << 21)
+#define SZ_1G                  (1 << 30)
 
 typedef uint8_t		u8;
 typedef int8_t		s8;