Messages in this thread | | | Subject | Re: [PATCH] arm64/acpi: make ACPI boot preference configurable | From | "Rafael J. Wysocki" <> | Date | Wed, 28 Feb 2018 11:10:11 +0100 |
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On 2/28/2018 11:07 AM, Andy Shevchenko wrote: > On Wed, 2018-02-28 at 00:29 +0530, Bhupesh Sharma wrote: >> On Tue, Feb 27, 2018 at 8:14 PM, Jonathan Toppins <jtoppins@redhat.com >>> wrote: >>> On 02/27/2018 07:40 AM, Bhupesh Sharma wrote: >>> For arm64 DT is suppose to *not* be the preferred method, yet still >>> DT >>> is preferred if the firmware provides both tables to the kernel. >> However several arm64 products in embedded applications are still not >> SBSA/SBBR compliant (and I have worked on a couple of such >> implementations earlier) and still use bootloaders like u-boot (and >> also closed-source implementations) which have no support for ACPI >> currently and still rely on a DT to pass the system hardware >> information to the kernel. >> So far only open source implementation of a ACPI compliant firmware is >> EDK2/UEFI which supports ACPI as the preferred boot method > You mean for non-x86? > >> and I am >> not sure if all u-boot/in-house firmware implementations are planned >> to be ported over to EDK2/UEFI for embedded applications. > Why do you need that? ACPI (if you are talking about ACPI only, w/o EFI) > is supported in U-Boot for few x86 SoCs/platforms. Moreover, one of them > had never been shipped with ACPI/EFI complaint services in firmware and > ACPI layer is purely done in U-Boot. > Right, let alone Chromebooks. :-)
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