From 94ea03cdda520f0c0dc80cbb4674ab9a33749ee2 Mon Sep 17 00:00:00 2001 From: Glauber de Oliveira Costa Date: Wed, 30 Jan 2008 13:33:19 +0100 Subject: [PATCH] x86: provide read and write cr8 paravirt hooks Since the cr8 manipulation functions ended up staying in the tree, they can't be defined just when PARAVIRT is off: In this patch, those functions are defined for the PARAVIRT case too. [ mingo@elte.hu: fixes ] Signed-off-by: Glauber de Oliveira Costa Signed-off-by: Ingo Molnar Signed-off-by: Thomas Gleixner --- include/asm-x86/paravirt.h | 2 ++ include/asm-x86/system.h | 30 ++++++++++++++++-------------- 2 files changed, 18 insertions(+), 14 deletions(-) diff --git a/include/asm-x86/paravirt.h b/include/asm-x86/paravirt.h index 73547acbbbf5..a55f95e921ee 100644 --- a/include/asm-x86/paravirt.h +++ b/include/asm-x86/paravirt.h @@ -619,6 +619,7 @@ static inline void write_cr4(unsigned long x) PVOP_VCALL1(pv_cpu_ops.write_cr4, x); } +#ifdef CONFIG_X86_64 static inline unsigned long read_cr8(void) { return PVOP_CALL0(unsigned long, pv_cpu_ops.read_cr8); @@ -628,6 +629,7 @@ static inline void write_cr8(unsigned long x) { PVOP_VCALL1(pv_cpu_ops.write_cr8, x); } +#endif static inline void raw_safe_halt(void) { diff --git a/include/asm-x86/system.h b/include/asm-x86/system.h index 39474f2957a3..ee32ef9367f4 100644 --- a/include/asm-x86/system.h +++ b/include/asm-x86/system.h @@ -231,6 +231,20 @@ static inline void native_write_cr4(unsigned long val) asm volatile("mov %0,%%cr4": :"r" (val), "m" (__force_order)); } +#ifdef CONFIG_X86_64 +static inline unsigned long native_read_cr8(void) +{ + unsigned long cr8; + asm volatile("movq %%cr8,%0" : "=r" (cr8)); + return cr8; +} + +static inline void native_write_cr8(unsigned long val) +{ + asm volatile("movq %0,%%cr8" :: "r" (val) : "memory"); +} +#endif + static inline void native_wbinvd(void) { asm volatile("wbinvd": : :"memory"); @@ -248,21 +262,9 @@ static inline void native_wbinvd(void) #define read_cr4_safe() (native_read_cr4_safe()) #define write_cr4(x) (native_write_cr4(x)) #define wbinvd() (native_wbinvd()) - #ifdef CONFIG_X86_64 - -static inline unsigned long read_cr8(void) -{ - unsigned long cr8; - asm volatile("movq %%cr8,%0" : "=r" (cr8)); - return cr8; -} - -static inline void write_cr8(unsigned long val) -{ - asm volatile("movq %0,%%cr8" :: "r" (val) : "memory"); -} - +#define read_cr8() (native_read_cr8()) +#define write_cr8(x) (native_write_cr8(x)) #endif /* Clear the 'TS' bit */ -- 2.20.1