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Re: [tip:x86/mm] x86/boot/32: Defer resyncing initial_page_table until per-cpu is set up

From Jan Kiszka <jan.kiszka@siemens.com>
Newsgroups linux.kernel
Subject Re: [tip:x86/mm] x86/boot/32: Defer resyncing initial_page_table until per-cpu is set up
Date 2017-05-08 17:30 +0200
Message-ID <tESLN-5F6-39@gated-at.bofh.it> (permalink)
References (2 earlier) <tEKuR-mJ-1@gated-at.bofh.it> <tENj4-28p-3@gated-at.bofh.it> <tEP1w-3ge-31@gated-at.bofh.it> <tEQ7g-3UW-5@gated-at.bofh.it> <tES93-59R-1@gated-at.bofh.it>
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On 2017-05-08 16:45, Andy Shevchenko wrote:
> On Mon, May 8, 2017 at 3:34 PM, Jan Kiszka <jan.kiszka@siemens.com> wrote:
>> On 2017-05-08 13:21, Andy Lutomirski wrote:
> 
>> Yes, it's an EFI thing. Unfortunately, I didn't make
>> earlycon/earlyprintk work yet.
> 
> Quark does use HS UART for the console and we have no support for such
> in x86/earlyprintk. earlycon should work if you add proper parameters
> to the command line (including port base address, no ttySx), though I
> don't remember if it makes really "early".

Ah, that explains it. I've tried earlycon, also with the apparently
correct params, but it didn't print anything in this case. And
earlyprintk=efi seems to use a framebuffer, while our devices are
headless...

Jan

-- 
Siemens AG, Corporate Technology, CT RDA ITP SES-DE
Corporate Competence Center Embedded Linux

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Re: [tip:x86/mm] x86/boot/32: Defer resyncing initial_page_table  until per-cpu is set up Jan Kiszka <jan.kiszka@siemens.com> - 2017-05-08 08:40 +0200
  Re: [tip:x86/mm] x86/boot/32: Defer resyncing initial_page_table  until per-cpu is set up Andy Shevchenko <andy.shevchenko@gmail.com> - 2017-05-08 11:40 +0200
    Re: [tip:x86/mm] x86/boot/32: Defer resyncing initial_page_table  until per-cpu is set up Andy Lutomirski <luto@kernel.org> - 2017-05-08 13:30 +0200
      Re: [tip:x86/mm] x86/boot/32: Defer resyncing initial_page_table  until per-cpu is set up Jan Kiszka <jan.kiszka@siemens.com> - 2017-05-08 14:40 +0200
        Re: [tip:x86/mm] x86/boot/32: Defer resyncing initial_page_table  until per-cpu is set up Andy Shevchenko <andy.shevchenko@gmail.com> - 2017-05-08 16:50 +0200
          Re: [tip:x86/mm] x86/boot/32: Defer resyncing initial_page_table  until per-cpu is set up Jan Kiszka <jan.kiszka@siemens.com> - 2017-05-08 17:30 +0200
        Re: [tip:x86/mm] x86/boot/32: Defer resyncing initial_page_table  until per-cpu is set up Jan Kiszka <jan.kiszka@siemens.com> - 2017-05-08 20:00 +0200
          Re: [tip:x86/mm] x86/boot/32: Defer resyncing initial_page_table  until per-cpu is set up Andy Lutomirski <luto@kernel.org> - 2017-05-09 02:10 +0200

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