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From: catalin.marinas@arm.com (Catalin Marinas)
To: linux-arm-kernel@lists.infradead.org
Subject: [PATCH v10 3/3] ARM: Check if a CPU has gone offline
Date: Thu, 15 May 2014 10:10:13 +0100	[thread overview]
Message-ID: <20140515091013.GD11117@localhost> (raw)
In-Reply-To: <1400127090-1320-4-git-send-email-ashwin.chaugule@linaro.org>

On Thu, May 15, 2014 at 05:11:30AM +0100, Ashwin Chaugule wrote:
> PSCIv0.2 adds a new function called AFFINITY_INFO, which
> can be used to query if a specified CPU has actually gone
> offline. Calling this function via cpu_kill ensures that
> a CPU has quiesced after a call to cpu_die. This helps
> prevent the CPU from doing arbitrary bad things when data
> or instructions are clobbered (as happens with kexec)
> in the window between a CPU announcing that it is dead
> and said CPU leaving the kernel.
> 
> Signed-off-by: Ashwin Chaugule <ashwin.chaugule@linaro.org>
> Signed-off-by: Mark Rutland <mark.rutland@arm.com>
> Reviewed-by: Rob Herring <robh@kernel.org>

Acked-by: Catalin Marinas <catalin.marinas@arm.com>

      reply	other threads:[~2014-05-15  9:10 UTC|newest]

Thread overview: 7+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2014-05-15  4:11 [PATCH v10 0/3] PSCI v0.2 support and DT bindings Ashwin Chaugule
2014-05-15  4:11 ` [PATCH v10 1/3] PSCI: Add initial support for PSCIv0.2 functions Ashwin Chaugule
2014-05-15  9:09   ` Catalin Marinas
2014-05-15  4:11 ` [PATCH v10 2/3] Documentation: devicetree: Add new binding for PSCIv0.2 Ashwin Chaugule
2014-05-15  9:09   ` Catalin Marinas
2014-05-15  4:11 ` [PATCH v10 3/3] ARM: Check if a CPU has gone offline Ashwin Chaugule
2014-05-15  9:10   ` Catalin Marinas [this message]

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