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[Xen-devel,v4,2/4] xen/arm: Make AFFINITY_MASK generate correct mask for level3

Message ID 20160531025414.15539-3-Wei.Chen@linaro.org
State New
Headers show

Commit Message

Wei Chen May 31, 2016, 2:54 a.m. UTC 
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@linaro.org>
Reviewed-by: Julien Grall <julien.grall@arm.com>
---
v3-->v4:
Add missed Reviewed-by tag.

v2-->v3:
Update version numnber.

v1-->v2:
Add Julien's reviewed-by.
---
 xen/include/asm-arm/processor.h | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)
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Patch

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)