[Xen-devel] [PATCH v2 2/4] xen/arm: Make AFFINITY_MASK generate correct mask for level3

[Wei Chen <wei.chen@xxxxxxxxxx>]

The original affinity shift bits algorithm in AFFINITY_MASK is buggy,
it could not generate correct affinity shift bits of level3.
The macro MPIDR_LEVEL_SHIFT can calculate level3 affinity shift bits
correctly. We use this macro in AFFINITY_MASK to generate correct
mask for level3.

Signed-off-by: Wei Chen <Wei.Chen@xxxxxxxxxx>
Reviewed-by: Julien Grall <julien.grall@xxxxxxx>
---
v2: Add Julien's reviewed-by.
---
 xen/include/asm-arm/processor.h | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/xen/include/asm-arm/processor.h b/xen/include/asm-arm/processor.h
index 7de9c8e..b4cce7e 100644
--- a/xen/include/asm-arm/processor.h
+++ b/xen/include/asm-arm/processor.h
@@ -21,7 +21,6 @@
 #define MPIDR_HWID_MASK     _AC(0xffffff,U)
 #define MPIDR_INVALID       (~MPIDR_HWID_MASK)
 #define MPIDR_LEVEL_BITS    (8)
-#define AFFINITY_MASK(level)    ~((_AC(0x1,U) << ((level) * MPIDR_LEVEL_BITS)) 
- 1)
 
 
 /*
@@ -37,6 +36,8 @@
 #define MPIDR_AFFINITY_LEVEL(mpidr, level) \
          ((mpidr >> MPIDR_LEVEL_SHIFT(level)) & MPIDR_LEVEL_MASK)
 
+#define AFFINITY_MASK(level)    ~((_AC(0x1,UL) << MPIDR_LEVEL_SHIFT(level)) - 
1)
+
 /* TTBCR Translation Table Base Control Register */
 #define TTBCR_EAE    _AC(0x80000000,U)
 #define TTBCR_N_MASK _AC(0x07,U)
-- 
2.7.4


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