Messages in this thread | | | Date | Wed, 17 Jun 2015 11:33:50 +0200 | Subject | Re: [PATCH v4] ARM: early fixmap support for earlycon | From | Ard Biesheuvel <> |
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On 17 June 2015 at 01:22, Stephen Boyd <sboyd@codeaurora.org> wrote: > On 06/16/2015 02:51 PM, Stefan Agner wrote: >> Add early fixmap support, initially to support permanent, fixed >> mapping support for early console. A temporary, early pte is >> created which is migrated to a permanent mapping in paging_init. >> This is also needed since the attributes may change as the memory >> types are initialized. The 3MiB range of fixmap spans two pte >> tables, but currently only one pte is created for early fixmap >> support. >> >> Re-add FIX_KMAP_BEGIN to the index calculation in highmem.c since >> the index for kmap does not start at zero anymore. This reverts >> 4221e2e6b316 ("ARM: 8031/1: fixmap: remove FIX_KMAP_BEGIN and >> FIX_KMAP_END") to some extent. >> >> Cc: Mark Salter <msalter@redhat.com> >> Cc: Russell King <linux@arm.linux.org.uk> >> Cc: Kees Cook <keescook@chromium.org> >> Cc: Laura Abbott <lauraa@codeaurora.org> >> Cc: Arnd Bergmann <arnd@arndb.de> >> Cc: Ard Biesheuvel <ard.biesheuvel@linaro.org> >> Signed-off-by: Rob Herring <robh@kernel.org> >> Signed-off-by: Stefan Agner <stefan@agner.ch> >> > > Works on msm_serial. > > Tested-by: Stephen Boyd <sboyd@codeaurora.org> >
I gave this a spin as well, on Arndale, with /chosen/stdout-path set to &serial_2 and just 'earlycon' (without value) passed on the command line, and it works fine.
Tested-by: Ard Biesheuvel <ard.biesheuvel@linaro.org>
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