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From: Russell King - ARM Linux <linux@arm.linux.org.uk>
To: Stephen Boyd <sboyd@codeaurora.org>
Cc: linux-kernel@vger.kernel.org, linux-arm-msm@vger.kernel.org,
	linux-arm-kernel@lists.infradead.org,
	Kevin Hilman <khilman@linaro.org>,
	Andy Gross <agross@codeaurora.org>,
	Kumar Gala <galak@codeaurora.org>,
	Ard Biesheuvel <ard.biesheuvel@linaro.org>,
	Lina Iyer <lina.iyer@linaro.org>
Subject: Re: [PATCH v2 1/2] ARM: Add cpu_resume_arm() for firmwares that resume in ARM state
Date: Wed, 3 Jun 2015 00:40:48 +0100	[thread overview]
Message-ID: <20150602234048.GA7557@n2100.arm.linux.org.uk> (raw)
In-Reply-To: <1433272378-8470-2-git-send-email-sboyd@codeaurora.org>

On Tue, Jun 02, 2015 at 12:12:57PM -0700, Stephen Boyd wrote:
> Some platforms always enter the kernel in the ARM state even if
> the kernel is compiled for THUMB2. Add a small wrapper on top of
> cpu_resume() that switches into THUMB2 state.
> 
> This fixes a problem reported by Kevin Hilman on next-20150601
> where the ifc6410 fails to boot a THUMB2 kernel because the
> platform's firmware always enters the kernel in ARM mode from
> deep idle states.

I think this bit of the commit message isn't quite correct: this will
only resolve the boot problem with a T2 kernel when the failing platform
is converted to use the cpu_resume_arm() entry point.

Apart from that, the patch looks good to me, thanks.

-- 
FTTC broadband for 0.8mile line: currently at 10.5Mbps down 400kbps up
according to speedtest.net.

WARNING: multiple messages have this Message-ID (diff)
From: linux@arm.linux.org.uk (Russell King - ARM Linux)
To: linux-arm-kernel@lists.infradead.org
Subject: [PATCH v2 1/2] ARM: Add cpu_resume_arm() for firmwares that resume in ARM state
Date: Wed, 3 Jun 2015 00:40:48 +0100	[thread overview]
Message-ID: <20150602234048.GA7557@n2100.arm.linux.org.uk> (raw)
In-Reply-To: <1433272378-8470-2-git-send-email-sboyd@codeaurora.org>

On Tue, Jun 02, 2015 at 12:12:57PM -0700, Stephen Boyd wrote:
> Some platforms always enter the kernel in the ARM state even if
> the kernel is compiled for THUMB2. Add a small wrapper on top of
> cpu_resume() that switches into THUMB2 state.
> 
> This fixes a problem reported by Kevin Hilman on next-20150601
> where the ifc6410 fails to boot a THUMB2 kernel because the
> platform's firmware always enters the kernel in ARM mode from
> deep idle states.

I think this bit of the commit message isn't quite correct: this will
only resolve the boot problem with a T2 kernel when the failing platform
is converted to use the cpu_resume_arm() entry point.

Apart from that, the patch looks good to me, thanks.

-- 
FTTC broadband for 0.8mile line: currently at 10.5Mbps down 400kbps up
according to speedtest.net.

  reply	other threads:[~2015-06-02 23:41 UTC|newest]

Thread overview: 30+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2015-06-02 19:12 [PATCH v2 0/2] Fix cpuidle on qcom's THUMB2 kernels Stephen Boyd
2015-06-02 19:12 ` Stephen Boyd
2015-06-02 19:12 ` [PATCH v2 1/2] ARM: Add cpu_resume_arm() for firmwares that resume in ARM state Stephen Boyd
2015-06-02 19:12   ` Stephen Boyd
2015-06-02 23:40   ` Russell King - ARM Linux [this message]
2015-06-02 23:40     ` Russell King - ARM Linux
2015-06-03  0:11     ` Stephen Boyd
2015-06-03  0:11       ` Stephen Boyd
2015-06-08 21:33       ` Kevin Hilman
2015-06-08 21:33         ` Kevin Hilman
2015-06-08 21:38         ` Stephen Boyd
2015-06-08 21:38           ` Stephen Boyd
2015-06-08 22:03           ` Kevin Hilman
2015-06-08 22:03             ` Kevin Hilman
2015-06-09 15:29             ` Russell King - ARM Linux
2015-06-09 15:29               ` Russell King - ARM Linux
2015-06-09 18:32               ` Stephen Boyd
2015-06-09 18:32                 ` Stephen Boyd
2015-06-15  6:33   ` Uwe Kleine-König
2015-06-15  6:33     ` Uwe Kleine-König
2015-06-15 11:01     ` Russell King - ARM Linux
2015-06-15 11:01       ` Russell King - ARM Linux
2015-06-15 13:38       ` Uwe Kleine-König
2015-06-15 13:38         ` Uwe Kleine-König
2015-06-02 19:12 ` [PATCH v2 2/2] soc: qcom: spm: Fix idle on THUMB2 kernels Stephen Boyd
2015-06-02 19:12   ` Stephen Boyd
2015-06-04 16:15   ` Lina Iyer
2015-06-04 16:15     ` Lina Iyer
2015-06-02 21:23 ` [PATCH v2 0/2] Fix cpuidle on qcom's " Kevin Hilman
2015-06-02 21:23   ` Kevin Hilman

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