From: Wei Chen <wei.chen@linaro.org>
To: xen-devel@lists.xen.org
Cc: julien.grall@arm.com, sstabellini@kernel.org,
Wei Chen <Wei.Chen@linaro.org>,
steve.capper@arm.com
Subject: [PATCH v4 4/4] xen/arm: arm64: Remove MPIDR multiprocessing extensions check
Date: Tue, 31 May 2016 10:54:14 +0800 [thread overview]
Message-ID: <20160531025414.15539-5-Wei.Chen@linaro.org> (raw)
In-Reply-To: <20160531025414.15539-1-Wei.Chen@linaro.org>
In AArch32, MPIDR bit 31 is defined as multiprocessing extensions bit.
But in AArch64, this bit is always RES1. So the value check for this
bit is no longer necessary in AArch64.
Signed-off-by: Wei Chen <Wei.Chen@linaro.org>
Reviewed-by: Julien Grall <julien.grall@arm.com>
---
v3-->v4:
1. Add missed Reviewed-by tag.
v2--v3:
1. Fix a typo in commit messages.
2. Add Julien's Reviewed-by.
v1-->v2:
Make clear the status of MPIDR.SMP bit in AArch32 and AArch64.
---
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)
--
2.7.4
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next prev parent reply other threads:[~2016-05-31 2:54 UTC|newest]
Thread overview: 10+ messages / expand[flat|nested] mbox.gz Atom feed top
2016-05-31 2:54 [PATCH v4 0/4] xen/arm: arm64: Widen register access to mpidr to 64-bits Wei Chen
2016-05-31 2:54 ` [PATCH v4 1/4] xen/arm: Change the variable type of cpu_logical_map to register_t Wei Chen
2016-05-31 2:54 ` [PATCH v4 2/4] xen/arm: Make AFFINITY_MASK generate correct mask for level3 Wei Chen
2016-05-31 2:54 ` [PATCH v4 3/4] xen:arm: arm64: Add correct MPIDR_HWID_MASK value for ARM64 Wei Chen
2016-05-31 10:01 ` Julien Grall
2016-05-31 2:54 ` Wei Chen [this message]
2016-06-01 9:29 ` [PATCH v4 0/4] xen/arm: arm64: Widen register access to mpidr to 64-bits Stefano Stabellini
2016-06-01 9:37 ` Wei Liu
2016-06-01 10:37 ` Julien Grall
2016-06-01 11:49 ` Edgar E. Iglesias
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