Messages in this thread | | | Date | Fri, 02 Jan 2015 17:28:11 +0800 | From | Hanjun Guo <> | Subject | Re: [PATCH v5 18/18] Documentation: ACPI for ARM64 |
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Hi Graeme,
On 2015年01月02日 04:04, Graeme Gregory wrote: > On Wed, Dec 31, 2014 at 04:34:46PM +0800, Hanjun Guo wrote: >> On 2014年12月31日 04:13, ashwinc@codeaurora.org wrote: >>> Hi Hanjun, >>> >>> Overall the document looks good to us. Some minor clarifications below. >>> >>>> ---------- Forwarded message ---------- >>>> From: Graeme Gregory <graeme.gregory@linaro.org> >>>> >>>> Add documentation for the guidelines of how to use ACPI >>>> on ARM64. >>>> >>>> Signed-off-by: Graeme Gregory <graeme.gregory@linaro.org> >>>> Signed-off-by: Al Stone <al.stone@linaro.org> >>>> Signed-off-by: Hanjun Guo <hanjun.guo@linaro.org> >>>> --- >>>> Documentation/arm64/arm-acpi.txt | 323 >>>> ++++++++++++++++++++++++++++++++++++++ >>>> 1 file changed, 323 insertions(+) >>>> create mode 100644 Documentation/arm64/arm-acpi.txt >>>> >>> >>> [..] >>> >>>> +Relationship with Device Tree >>>> +----------------------------- >>> >>> [..] >>> >>>> +When booting using ACPI tables, the /chosen node in DT will still be >>>> parsed >>>> +to extract the kernel command line and initrd path. No other section of >>>> the >>>> +DT will be used. >>> >>> Is this still true? >> >> No, we can booting the ACPI system in EFI stub without dtb. Catalin >> also pointed out this issue, I will remove this paragraph. >> > > The paragraph is still correct, the /chosen node is always present even > if nothing else is.
Sorry for the confusing, I mean no dtb needed for the command line if ACPI tables are available.
efi will create a empty dtb if no dtb found, and add the cmd line into the new created dtb, I'm just wondering, can we remove the limitation for passing the cmd line in /chosen node in the future?
Thanks Hanjun
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