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authorStefan Agner <stefan@agner.ch>2015-08-13 02:01:52 +0300
committerRussell King <rmk+kernel@arm.linux.org.uk>2015-08-18 16:00:29 +0300
commita5f4c561b3b19a9bc43a81da6382b0098ebbc1fb (patch)
tree80905f24141bfc42c6506f65168d0188a2060b69 /arch/arm/Kconfig
parentefaa6e266ba70439da00e7f1c8a218e243ae140a (diff)
downloadlinux-a5f4c561b3b19a9bc43a81da6382b0098ebbc1fb.tar.xz
ARM: 8415/1: early fixmap support for earlycon
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: 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> Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
Diffstat (limited to 'arch/arm/Kconfig')
-rw-r--r--arch/arm/Kconfig3
1 files changed, 3 insertions, 0 deletions
diff --git a/arch/arm/Kconfig b/arch/arm/Kconfig
index a750c1425c3a..1bcda7cb2e04 100644
--- a/arch/arm/Kconfig
+++ b/arch/arm/Kconfig
@@ -188,6 +188,9 @@ config ARCH_HAS_ILOG2_U64
config ARCH_HAS_BANDGAP
bool
+config FIX_EARLYCON_MEM
+ def_bool y if MMU
+
config GENERIC_HWEIGHT
bool
default y