Hi Wei,
On 25/05/16 03:10, Wei Chen wrote:
In ARM64, the MPIDR multiprocessing extensions bit is reserved to 1.
Well, technically the bit is unamed for ARM64. So I would make clear
that the name is from AArch32. Something along:
"The bit 31 (former bit Multiprocessing extensions bit in AArch32) is
always RES1 for AArch64."
So, the value check for this bit is no longer necessary on ARM64.
Signed-off-by: Wei Chen <wei.c...@linaro.org>
---
xen/arch/arm/arm64/head.S | 1 -
1 file changed, 1 deletion(-)
diff --git a/xen/arch/arm/arm64/head.S b/xen/arch/arm/arm64/head.S
index 3090beb..91e2817 100644
--- a/xen/arch/arm/arm64/head.S
+++ b/xen/arch/arm/arm64/head.S
@@ -267,7 +267,6 @@ common_start:
* find that multiprocessor extensions
are
* present and the system is SMP */
mrs x0, mpidr_el1
- tbz x0, _MPIDR_SMP, 1f /* Multiprocessor extension not
supported? */
tbnz x0, _MPIDR_UP, 1f /* Uniprocessor system? */
ldr x13, =(~MPIDR_HWID_MASK)
Regards,
--
Julien Grall
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