From 91dfc423cc8cfd399fb308a837102a7ab7fa067e Mon Sep 17 00:00:00 2001 From: Guenter Roeck Date: Tue, 2 Feb 2010 08:52:20 -0800 Subject: MIPS: 64-bit: Detect virtual memory size Linux kernel 2.6.32 and later allocate address space from the top of the kernel virtual memory address space. This patch implements virtual memory size detection for 64 bit MIPS CPUs to avoid resulting crashes. Signed-off-by: Guenter Roeck Cc: linux-mips@linux-mips.org Patchwork: http://patchwork.linux-mips.org/patch/935/ Reviewed-by: David Daney Signed-off-by: Ralf Baechle --- arch/mips/include/asm/cpu-info.h | 3 +++ 1 file changed, 3 insertions(+) (limited to 'arch/mips/include/asm/cpu-info.h') diff --git a/arch/mips/include/asm/cpu-info.h b/arch/mips/include/asm/cpu-info.h index 126044308dec..b39def3f6e03 100644 --- a/arch/mips/include/asm/cpu-info.h +++ b/arch/mips/include/asm/cpu-info.h @@ -58,6 +58,9 @@ struct cpuinfo_mips { struct cache_desc tcache; /* Tertiary/split secondary cache */ int srsets; /* Shadow register sets */ int core; /* physical core number */ +#ifdef CONFIG_64BIT + int vmbits; /* Virtual memory size in bits */ +#endif #if defined(CONFIG_MIPS_MT_SMP) || defined(CONFIG_MIPS_MT_SMTC) /* * In the MIPS MT "SMTC" model, each TC is considered -- cgit v1.2.2