From 8e748c8d09a9314eedb5c6367d9acfaacddcdc88 Mon Sep 17 00:00:00 2001 From: James Hogan Date: Mon, 27 Apr 2015 15:07:16 +0100 Subject: MIPS: Fix KVM guest fixmap address KVM guest kernels for trap & emulate run in user mode, with a modified set of kernel memory segments. However the fixmap address is still in the normal KSeg3 region at 0xfffe0000 regardless, causing problems when cache alias handling makes use of them when handling copy on write. Therefore define FIXADDR_TOP as 0x7ffe0000 in the guest kernel mapped region when CONFIG_KVM_GUEST is defined. Signed-off-by: James Hogan Cc: linux-mips@linux-mips.org Cc: # v3.10+ Patchwork: https://patchwork.linux-mips.org/patch/9887/ Signed-off-by: Ralf Baechle --- arch/mips/include/asm/mach-generic/spaces.h | 4 ++++ 1 file changed, 4 insertions(+) (limited to 'arch/mips/include/asm/mach-generic') diff --git a/arch/mips/include/asm/mach-generic/spaces.h b/arch/mips/include/asm/mach-generic/spaces.h index 9488fa5f8866..afc96ecb9004 100644 --- a/arch/mips/include/asm/mach-generic/spaces.h +++ b/arch/mips/include/asm/mach-generic/spaces.h @@ -94,7 +94,11 @@ #endif #ifndef FIXADDR_TOP +#ifdef CONFIG_KVM_GUEST +#define FIXADDR_TOP ((unsigned long)(long)(int)0x7ffe0000) +#else #define FIXADDR_TOP ((unsigned long)(long)(int)0xfffe0000) #endif +#endif #endif /* __ASM_MACH_GENERIC_SPACES_H */ -- cgit v1.2.3