From: catalin.marinas@arm.com (Catalin Marinas)
To: linux-arm-kernel@lists.infradead.org
Subject: [PATCH v5 4/6] arm64: Port SWP/SWPB emulation support from arm
Date: Thu, 20 Nov 2014 16:31:07 +0000 [thread overview]
Message-ID: <20141120163107.GD5447@e104818-lin.cambridge.arm.com> (raw)
In-Reply-To: <1416310887-14649-5-git-send-email-punit.agrawal@arm.com>
On Tue, Nov 18, 2014 at 11:41:25AM +0000, Punit Agrawal wrote:
> The SWP instruction was deprecated in the ARMv6 architecture. The
> ARMv7 multiprocessing extensions mandate that SWP/SWPB instructions
> are treated as undefined from reset, with the ability to enable them
> through the System Control Register SW bit. With ARMv8, the option to
> enable these instructions through System Control Register was dropped
> as well.
>
> To support legacy applications using these instructions, port the
> emulation of the SWP and SWPB instructions from the arm port to arm64.
>
> Signed-off-by: Punit Agrawal <punit.agrawal@arm.com>
Reviewed-by: Catalin Marinas <catalin.marinas@arm.com>
next prev parent reply other threads:[~2014-11-20 16:31 UTC|newest]
Thread overview: 16+ messages / expand[flat|nested] mbox.gz Atom feed top
2014-11-18 11:41 [PATCH v5 0/6] Legacy instruction emulation for arm64 Punit Agrawal
2014-11-18 11:41 ` [PATCH v5 1/6] arm64: Add support for hooks to handle undefined instructions Punit Agrawal
2014-11-18 11:41 ` [PATCH v5 2/6] arm64: Add AArch32 instruction set condition code checks Punit Agrawal
2014-11-18 11:41 ` [PATCH v5 3/6] arm64: Add framework for legacy instruction emulation Punit Agrawal
2014-11-20 16:30 ` Catalin Marinas
2014-11-24 20:58 ` Greg Hackmann
2014-11-25 10:07 ` Will Deacon
2014-11-25 10:13 ` Punit Agrawal
2014-11-18 11:41 ` [PATCH v5 4/6] arm64: Port SWP/SWPB emulation support from arm Punit Agrawal
2014-11-20 16:31 ` Catalin Marinas [this message]
2014-11-18 11:41 ` [PATCH v5 5/6] arm64: Emulate CP15 Barrier instructions Punit Agrawal
2014-11-18 11:41 ` [PATCH v5 6/6] arm64: Trace emulation of AArch32 legacy instructions Punit Agrawal
2014-11-18 14:32 ` Steven Rostedt
2014-11-18 14:51 ` Punit Agrawal
2014-11-20 16:33 ` [PATCH v5 0/6] Legacy instruction emulation for arm64 Catalin Marinas
2014-11-24 19:24 ` Punit Agrawal
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