Messages in this thread | | | Subject | Re: [tip:x86/mm] x86/boot/32: Defer resyncing initial_page_table until per-cpu is set up | From | Jan Kiszka <> | Date | Mon, 8 May 2017 17:24:58 +0200 |
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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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