From: linux@armlinux.org.uk (Russell King - ARM Linux)
To: linux-arm-kernel@lists.infradead.org
Subject: [PATCH 02/10] ARM: V7M: Make read_cpuid() generally available on V7M.
Date: Mon, 13 Jun 2016 16:15:17 +0100 [thread overview]
Message-ID: <20160613151517.GV1041@n2100.armlinux.org.uk> (raw)
In-Reply-To: <1465830189-20128-3-git-send-email-vladimir.murzin@arm.com>
On Mon, Jun 13, 2016 at 04:03:01PM +0100, Vladimir Murzin wrote:
> This requires a custom specialisation for each of the CPUID_* registers, and
> as more than just CPUID_ID may be implemented in the future this doesn't
> make much sense.
You shouldn't need most of this patch. The CPUID registers are defined
in such a way that unimplemented registers do not fault, but return the
MIDR value. If you're just implementing MIDR, then you should just
return the MIDR value and be done with it.
(Any location reading the other CPUID registers without checking whether
it's a MIDR alias is probably buggy.)
--
RMK's Patch system: http://www.armlinux.org.uk/developer/patches/
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next prev parent reply other threads:[~2016-06-13 15:15 UTC|newest]
Thread overview: 22+ messages / expand[flat|nested] mbox.gz Atom feed top
2016-06-13 15:02 [PATCH 00/10] ARM: V7M: Support caches Vladimir Murzin
2016-06-13 15:03 ` [PATCH 01/10] ARM: factor out CSSELR/CCSIDR operations that use cp15 directly Vladimir Murzin
2016-06-13 15:03 ` [PATCH 02/10] ARM: V7M: Make read_cpuid() generally available on V7M Vladimir Murzin
2016-06-13 15:15 ` Russell King - ARM Linux [this message]
2016-06-13 16:21 ` Vladimir Murzin
2016-06-13 15:03 ` [PATCH 03/10] ARM: V7M: Add addresses for mem-mapped V7M cache operations Vladimir Murzin
2016-06-13 15:03 ` [PATCH 04/10] ARM: V7M: Add support for reading the CTR with CPUID_CACHETYPE Vladimir Murzin
2016-06-13 15:03 ` [PATCH 05/10] ARM: Extract cp15 operations from cache flush code Vladimir Murzin
2016-06-13 15:03 ` [PATCH 06/10] ARM: V7M: Implement cache macros for V7M Vladimir Murzin
2016-06-13 15:18 ` Russell King - ARM Linux
2016-06-13 16:27 ` Vladimir Murzin
2016-06-13 16:29 ` Russell King - ARM Linux
2016-06-13 16:34 ` Vladimir Murzin
2016-06-13 15:03 ` [PATCH 07/10] ARM: V7M: fix notrace variant of save_and_disable_irqs Vladimir Murzin
2016-06-13 15:03 ` [PATCH 08/10] ARM: V7M: Wire up caches for V7M processors with cache support Vladimir Murzin
2016-06-13 15:03 ` [PATCH 09/10] ARM: V7M: Indirect proc_info construction for V7M CPUs Vladimir Murzin
2016-06-13 15:03 ` [PATCH 10/10] ARM: V7M: Add support for the Cortex-M7 processor Vladimir Murzin
2016-06-13 16:09 ` [PATCH 00/10] ARM: V7M: Support caches Alexandre Torgue
2016-06-13 16:19 ` Vladimir Murzin
2016-06-13 16:29 ` Alexandre Torgue
2016-06-15 10:14 ` Alexandre Torgue
2016-06-15 12:43 ` Vladimir Murzin
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