From: Dave Hansen <dave.han...@linux.intel.com> Currently, all of the checks for KAISER are compile-time checks.
Runtime checks are needed for turning it on/off at runtime. Add a function to do that. Signed-off-by: Dave Hansen <dave.han...@linux.intel.com> Signed-off-by: Thomas Gleixner <t...@linutronix.de> Cc: Linus Torvalds <torva...@linux-foundation.org> Cc: Peter Zijlstra <pet...@infradead.org> Cc: daniel.gr...@iaik.tugraz.at Cc: hu...@google.com Cc: keesc...@google.com Cc: linux...@kvack.org Cc: l...@kernel.org Cc: michael.schw...@iaik.tugraz.at Cc: moritz.l...@iaik.tugraz.at Cc: richard.fell...@student.tugraz.at Link: https://lkml.kernel.org/r/20171123003518.b7d81...@viggo.jf.intel.com Signed-off-by: Ingo Molnar <mi...@kernel.org> --- arch/x86/include/asm/kaiser.h | 5 +++++ include/linux/kaiser.h | 5 +++++ 2 files changed, 10 insertions(+) diff --git a/arch/x86/include/asm/kaiser.h b/arch/x86/include/asm/kaiser.h index 040cb096d29d..35f12a8a7071 100644 --- a/arch/x86/include/asm/kaiser.h +++ b/arch/x86/include/asm/kaiser.h @@ -56,6 +56,11 @@ extern void kaiser_remove_mapping(unsigned long start, unsigned long size); */ extern void kaiser_init(void); +static inline bool kaiser_active(void) +{ + extern int kaiser_enabled; + return kaiser_enabled; +} #endif #endif /* __ASSEMBLY__ */ diff --git a/include/linux/kaiser.h b/include/linux/kaiser.h index 77db4230a0dd..a3d28d00d555 100644 --- a/include/linux/kaiser.h +++ b/include/linux/kaiser.h @@ -28,5 +28,10 @@ static inline int kaiser_add_mapping(unsigned long addr, unsigned long size, static inline void kaiser_add_mapping_cpu_entry(int cpu) { } + +static inline bool kaiser_active(void) +{ + return 0; +} #endif /* !CONFIG_KAISER */ #endif /* _INCLUDE_KAISER_H */ -- 2.14.1
