From 171543e752723191281994e51278050526d1c017 Mon Sep 17 00:00:00 2001 From: Daniel Silsby Date: Mon, 15 Jul 2019 17:39:59 -0400 Subject: [PATCH] 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 Signed-off-by: Paul Cercueil Signed-off-by: Paul Burton Cc: Ralf Baechle Cc: James Hogan Cc: od@zcrc.me Cc: linux-mips@vger.kernel.org Cc: linux-kernel@vger.kernel.org --- arch/mips/Kconfig | 1 + 1 file changed, 1 insertion(+) 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