From mboxrd@z Thu Jan 1 00:00:00 1970 From: AKASHI Takahiro Subject: Re: arm64 crashkernel fails to boot on acpi-only machines due to ACPI regions being no longer mapped as NOMAP Date: Mon, 13 Nov 2017 18:27:31 +0900 Message-ID: <20171113092730.GA29552@linaro.org> References: Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Return-path: Content-Disposition: inline In-Reply-To: Sender: linux-efi-owner-u79uwXL29TY76Z2rM5mHXA@public.gmane.org To: Bhupesh Sharma Cc: Ard Biesheuvel , Matt Fleming , linux-arm-kernel-IAPFreCvJWM7uuMidbF8XUB+6BGkLq7r@public.gmane.org, linux-efi-u79uwXL29TY76Z2rM5mHXA@public.gmane.org, Mark Rutland , james.morse-5wv7dgnIgG8@public.gmane.org, Bhupesh SHARMA List-Id: linux-efi@vger.kernel.org Hi, On Fri, Nov 10, 2017 at 05:41:56PM +0530, Bhupesh Sharma wrote: > Resent with Akashi's correct email address. > > On Fri, Nov 10, 2017 at 5:39 PM, Bhupesh Sharma wrote: > > Hi Ard, Akashi > > > > I have met an issue on an arm64 board using the latest master branch from Linus. (snip) > > > > 8. Also, I think now the crashkernel handling changed by > > e7cd190385d17790cc3eb3821b1094b00aacf325 (arm64: mark reserved > > memblock regions explicitly in iomem), needs to be changed to handle > > the change added by Ard to fix this issue on ACPI only machines. > > > > I have a dirty hack in place, but I would like to have your opinions > > about what can be a more concrete fix to this issue (as we mark these > > regions as System RAM now rather than NOMAP) and I don't have a DTB > > based machine to test on currently. I don't know much about acpi reclaim regions, can you please tell me how your change affects your panic case? Thanks, -Takahiro AKASHI > > Please share your views. > > > > Regards, > > Bhupesh From mboxrd@z Thu Jan 1 00:00:00 1970 From: takahiro.akashi@linaro.org (AKASHI Takahiro) Date: Mon, 13 Nov 2017 18:27:31 +0900 Subject: arm64 crashkernel fails to boot on acpi-only machines due to ACPI regions being no longer mapped as NOMAP In-Reply-To: References: Message-ID: <20171113092730.GA29552@linaro.org> To: linux-arm-kernel@lists.infradead.org List-Id: linux-arm-kernel.lists.infradead.org Hi, On Fri, Nov 10, 2017 at 05:41:56PM +0530, Bhupesh Sharma wrote: > Resent with Akashi's correct email address. > > On Fri, Nov 10, 2017 at 5:39 PM, Bhupesh Sharma wrote: > > Hi Ard, Akashi > > > > I have met an issue on an arm64 board using the latest master branch from Linus. (snip) > > > > 8. Also, I think now the crashkernel handling changed by > > e7cd190385d17790cc3eb3821b1094b00aacf325 (arm64: mark reserved > > memblock regions explicitly in iomem), needs to be changed to handle > > the change added by Ard to fix this issue on ACPI only machines. > > > > I have a dirty hack in place, but I would like to have your opinions > > about what can be a more concrete fix to this issue (as we mark these > > regions as System RAM now rather than NOMAP) and I don't have a DTB > > based machine to test on currently. I don't know much about acpi reclaim regions, can you please tell me how your change affects your panic case? Thanks, -Takahiro AKASHI > > Please share your views. > > > > Regards, > > Bhupesh