From mboxrd@z Thu Jan 1 00:00:00 1970 From: Sebastian Capella Subject: Re: [PATCH RFC v1 3/3] ARM hibernation / suspend-to-disk Date: Wed, 26 Feb 2014 09:50:55 -0800 Message-ID: <20140226175055.3502.49656@capellas-linux> References: <1392774729-3235-1-git-send-email-sebastian.capella@linaro.org> <1392774729-3235-4-git-send-email-sebastian.capella@linaro.org> <20140219161254.GB19343@e102568-lin.cambridge.arm.com> <20140222103840.GH21483@n2100.arm.linux.org.uk> <20140222120910.GA9012@e102568-lin.cambridge.arm.com> <20140223200208.12998.47604@capellas-linux> <20140225113251.GB6855@e102568-lin.cambridge.arm.com> <20140225175531.18229.77850@capellas-linux> <20140226102427.GA22839@e102568-lin.cambridge.arm.com> Mime-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Return-path: In-Reply-To: <20140226102427.GA22839@e102568-lin.cambridge.arm.com> List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+linux-arm-kernel=m.gmane.org@lists.infradead.org To: Lorenzo Pieralisi Cc: Len Brown , "linaro-kernel@lists.linaro.org" , Russell King - ARM Linux , Jonathan Austin , "linux-pm@vger.kernel.org" , Catalin Marinas , Nicolas Pitre , Will Deacon , "linux-kernel@vger.kernel.org" , Santosh Shilimkar , "Rafael J. Wysocki" , Pavel Machek , Uwe Kleine-K?nig , Russ Dill , Cyril Chemparathy , Stephen Boyd , "linux-arm-kernel@lists.infradead.org" List-Id: linux-pm@vger.kernel.org Quoting Lorenzo Pieralisi (2014-02-26 02:24:27) > On Tue, Feb 25, 2014 at 05:55:31PM +0000, Sebastian Capella wrote: > > Please add: > > "swsusp_save() is executed in the suspend finisher so that the CPU context > pointer and memory are part of the saved image, which is required by the > resume kernel image to restart execution from swsusp_arch_suspend()" > > > * soft_restart is not technically needed, but is used > > * to get success returned from cpu_suspend. > > * After resume, the hibernation snapshot is written out. > > "When soft reboot completes, the hibernation snapshot is written out." > > Resume is confusing since this code is resuming twice :D on image saving > and on kernel image restoration. Thanks Lorenzo! Here's what I've got. /* * Snapshot kernel memory and reset the system. * * swsusp_save() is executed in the suspend finisher so that the CPU * context pointer and memory are part of the saved image, which is * required by the resume kernel image to restart execution from * swsusp_arch_suspend(). * * soft_restart is not technically needed, but is used to get success * returned from cpu_suspend. * * When soft reboot completes, the hibernation snapshot is * written out. */ Does this look ok? I'll prepare a v4 patchset. Thanks! Sebastian From mboxrd@z Thu Jan 1 00:00:00 1970 From: sebastian.capella@linaro.org (Sebastian Capella) Date: Wed, 26 Feb 2014 09:50:55 -0800 Subject: [PATCH RFC v1 3/3] ARM hibernation / suspend-to-disk In-Reply-To: <20140226102427.GA22839@e102568-lin.cambridge.arm.com> References: <1392774729-3235-1-git-send-email-sebastian.capella@linaro.org> <1392774729-3235-4-git-send-email-sebastian.capella@linaro.org> <20140219161254.GB19343@e102568-lin.cambridge.arm.com> <20140222103840.GH21483@n2100.arm.linux.org.uk> <20140222120910.GA9012@e102568-lin.cambridge.arm.com> <20140223200208.12998.47604@capellas-linux> <20140225113251.GB6855@e102568-lin.cambridge.arm.com> <20140225175531.18229.77850@capellas-linux> <20140226102427.GA22839@e102568-lin.cambridge.arm.com> Message-ID: <20140226175055.3502.49656@capellas-linux> To: linux-arm-kernel@lists.infradead.org List-Id: linux-arm-kernel.lists.infradead.org Quoting Lorenzo Pieralisi (2014-02-26 02:24:27) > On Tue, Feb 25, 2014 at 05:55:31PM +0000, Sebastian Capella wrote: > > Please add: > > "swsusp_save() is executed in the suspend finisher so that the CPU context > pointer and memory are part of the saved image, which is required by the > resume kernel image to restart execution from swsusp_arch_suspend()" > > > * soft_restart is not technically needed, but is used > > * to get success returned from cpu_suspend. > > * After resume, the hibernation snapshot is written out. > > "When soft reboot completes, the hibernation snapshot is written out." > > Resume is confusing since this code is resuming twice :D on image saving > and on kernel image restoration. Thanks Lorenzo! Here's what I've got. /* * Snapshot kernel memory and reset the system. * * swsusp_save() is executed in the suspend finisher so that the CPU * context pointer and memory are part of the saved image, which is * required by the resume kernel image to restart execution from * swsusp_arch_suspend(). * * soft_restart is not technically needed, but is used to get success * returned from cpu_suspend. * * When soft reboot completes, the hibernation snapshot is * written out. */ Does this look ok? I'll prepare a v4 patchset. Thanks! Sebastian