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| author | Daniel Silsby <dansilsby@gmail.com> | 2019-07-15 17:39:59 -0400 |
|---|---|---|
| committer | Paul Burton <paul.burton@mips.com> | 2019-07-21 14:29:29 -0700 |
| commit | 171543e752723191281994e51278050526d1c017 (patch) | |
| tree | c40de36a572a0ad228d59584c1d8d7183b3f2ab4 /arch/mips/Kconfig | |
| parent | 5f9e832c137075045d15cd6899ab0505cfb2ca4b (diff) | |
| download | linux-171543e752723191281994e51278050526d1c017.tar.bz2 | |
MIPS: Disallow CPU_SUPPORTS_HUGEPAGES for XPA,EVA
In preparation for 32-bit MIPS huge page support.
EVA,XPA are extended-addressing modes for 32-bit MIPS systems. Because
huge pages aren't currently supported in 32-bit MIPS, this doesn't take
any features away from EVA,XPA-enabled systems. However, the soon-to-
come 32-bit MIPS huge page support doesn't yet support them.
This also disables CPU_SUPPORTS_HUGEPAGES for the small number of 32-bit
MIPS CPUs from Alchemy/Netlogic that support a custom 36-bit extended
addressing. It's unknown if they even support huge pages in hardware.
Signed-off-by: Daniel Silsby <dansilsby@gmail.com>
Signed-off-by: Paul Cercueil <paul@crapouillou.net>
Signed-off-by: Paul Burton <paul.burton@mips.com>
Cc: Ralf Baechle <ralf@linux-mips.org>
Cc: James Hogan <jhogan@kernel.org>
Cc: od@zcrc.me
Cc: linux-mips@vger.kernel.org
Cc: linux-kernel@vger.kernel.org
Diffstat (limited to 'arch/mips/Kconfig')
| -rw-r--r-- | arch/mips/Kconfig | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/arch/mips/Kconfig b/arch/mips/Kconfig index d50fafd7bf3a..ff5f1314241e 100644 --- a/arch/mips/Kconfig +++ b/arch/mips/Kconfig @@ -2110,6 +2110,7 @@ config CPU_SUPPORTS_ADDRWINCFG bool config CPU_SUPPORTS_HUGEPAGES bool + depends on !(32BIT && (ARCH_PHYS_ADDR_T_64BIT || EVA)) config CPU_SUPPORTS_UNCACHED_ACCELERATED bool config MIPS_PGD_C0_CONTEXT |