From: Glauber de Oliveira Costa Date: Wed, 30 Jan 2008 12:31:27 +0000 (+0100) Subject: x86: unify paravirt pieces of processor.h X-Git-Tag: v2.6.25-rc1~1143^2~544 X-Git-Url: https://err.no/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=1b46cbe0ccaad25786526601bc54426f2e2abb20;p=linux-2.6 x86: unify paravirt pieces of processor.h This patch unifies the paravirt pieces of processor.h The functionality present in 32 bit, but not (yet) in 64-bit, like load_sp0 is _not_ done here, and let to a different patch. With this unification, we get paravirt for free in x86_64 processor.h Signed-off-by: Glauber de Oliveira Costa Signed-off-by: Ingo Molnar Signed-off-by: Thomas Gleixner --- diff --git a/include/asm-x86/processor.h b/include/asm-x86/processor.h index 36ee9881b7..8d0af7bf09 100644 --- a/include/asm-x86/processor.h +++ b/include/asm-x86/processor.h @@ -29,9 +29,97 @@ static inline void load_cr3(pgd_t *pgdir) # include "processor_64.h" #endif +static inline unsigned long native_get_debugreg(int regno) +{ + unsigned long val = 0; /* Damn you, gcc! */ + + switch (regno) { + case 0: + asm("mov %%db0, %0" :"=r" (val)); break; + case 1: + asm("mov %%db1, %0" :"=r" (val)); break; + case 2: + asm("mov %%db2, %0" :"=r" (val)); break; + case 3: + asm("mov %%db3, %0" :"=r" (val)); break; + case 6: + asm("mov %%db6, %0" :"=r" (val)); break; + case 7: + asm("mov %%db7, %0" :"=r" (val)); break; + default: + BUG(); + } + return val; +} + +static inline void native_set_debugreg(int regno, unsigned long value) +{ + switch (regno) { + case 0: + asm("mov %0,%%db0" : /* no output */ :"r" (value)); + break; + case 1: + asm("mov %0,%%db1" : /* no output */ :"r" (value)); + break; + case 2: + asm("mov %0,%%db2" : /* no output */ :"r" (value)); + break; + case 3: + asm("mov %0,%%db3" : /* no output */ :"r" (value)); + break; + case 6: + asm("mov %0,%%db6" : /* no output */ :"r" (value)); + break; + case 7: + asm("mov %0,%%db7" : /* no output */ :"r" (value)); + break; + default: + BUG(); + } +} + + #ifndef CONFIG_PARAVIRT #define __cpuid native_cpuid -#endif +#define paravirt_enabled() 0 + +/* + * These special macros can be used to get or set a debugging register + */ +#define get_debugreg(var, register) \ + (var) = native_get_debugreg(register) +#define set_debugreg(value, register) \ + native_set_debugreg(register, value) + +#endif /* CONFIG_PARAVIRT */ + +/* + * Save the cr4 feature set we're using (ie + * Pentium 4MB enable and PPro Global page + * enable), so that any CPU's that boot up + * after us can get the correct flags. + */ +extern unsigned long mmu_cr4_features; + +static inline void set_in_cr4(unsigned long mask) +{ + unsigned cr4; + mmu_cr4_features |= mask; + cr4 = read_cr4(); + cr4 |= mask; + write_cr4(cr4); +} + +static inline void clear_in_cr4(unsigned long mask) +{ + unsigned cr4; + mmu_cr4_features &= ~mask; + cr4 = read_cr4(); + cr4 &= ~mask; + write_cr4(cr4); +} + + /* * Generic CPUID function diff --git a/include/asm-x86/processor_32.h b/include/asm-x86/processor_32.h index b586902acd..e7fc023cd8 100644 --- a/include/asm-x86/processor_32.h +++ b/include/asm-x86/processor_32.h @@ -120,33 +120,6 @@ extern void detect_ht(struct cpuinfo_x86 *c); static inline void detect_ht(struct cpuinfo_x86 *c) {} #endif - -/* - * Save the cr4 feature set we're using (ie - * Pentium 4MB enable and PPro Global page - * enable), so that any CPU's that boot up - * after us can get the correct flags. - */ -extern unsigned long mmu_cr4_features; - -static inline void set_in_cr4 (unsigned long mask) -{ - unsigned cr4; - mmu_cr4_features |= mask; - cr4 = read_cr4(); - cr4 |= mask; - write_cr4(cr4); -} - -static inline void clear_in_cr4 (unsigned long mask) -{ - unsigned cr4; - mmu_cr4_features &= ~mask; - cr4 = read_cr4(); - cr4 &= ~mask; - write_cr4(cr4); -} - /* Stop speculative execution */ static inline void sync_core(void) { @@ -482,57 +455,6 @@ static inline void native_load_sp0(struct tss_struct *tss, struct thread_struct wrmsr(MSR_IA32_SYSENTER_CS, thread->sysenter_cs, 0); } } - - -static inline unsigned long native_get_debugreg(int regno) -{ - unsigned long val = 0; /* Damn you, gcc! */ - - switch (regno) { - case 0: - asm("movl %%db0, %0" :"=r" (val)); break; - case 1: - asm("movl %%db1, %0" :"=r" (val)); break; - case 2: - asm("movl %%db2, %0" :"=r" (val)); break; - case 3: - asm("movl %%db3, %0" :"=r" (val)); break; - case 6: - asm("movl %%db6, %0" :"=r" (val)); break; - case 7: - asm("movl %%db7, %0" :"=r" (val)); break; - default: - BUG(); - } - return val; -} - -static inline void native_set_debugreg(int regno, unsigned long value) -{ - switch (regno) { - case 0: - asm("movl %0,%%db0" : /* no output */ :"r" (value)); - break; - case 1: - asm("movl %0,%%db1" : /* no output */ :"r" (value)); - break; - case 2: - asm("movl %0,%%db2" : /* no output */ :"r" (value)); - break; - case 3: - asm("movl %0,%%db3" : /* no output */ :"r" (value)); - break; - case 6: - asm("movl %0,%%db6" : /* no output */ :"r" (value)); - break; - case 7: - asm("movl %0,%%db7" : /* no output */ :"r" (value)); - break; - default: - BUG(); - } -} - /* * Set IOPL bits in EFLAGS from given mask */ @@ -552,21 +474,12 @@ static inline void native_set_iopl_mask(unsigned mask) #ifdef CONFIG_PARAVIRT #include #else -#define paravirt_enabled() 0 static inline void load_sp0(struct tss_struct *tss, struct thread_struct *thread) { native_load_sp0(tss, thread); } -/* - * These special macros can be used to get or set a debugging register - */ -#define get_debugreg(var, register) \ - (var) = native_get_debugreg(register) -#define set_debugreg(value, register) \ - native_set_debugreg(register, value) - #define set_iopl_mask native_set_iopl_mask #endif /* CONFIG_PARAVIRT */ diff --git a/include/asm-x86/processor_64.h b/include/asm-x86/processor_64.h index acecef80a5..6abe1ba30f 100644 --- a/include/asm-x86/processor_64.h +++ b/include/asm-x86/processor_64.h @@ -88,34 +88,6 @@ extern void init_scattered_cpuid_features(struct cpuinfo_x86 *c); extern unsigned int init_intel_cacheinfo(struct cpuinfo_x86 *c); extern unsigned short num_cache_leaves; -/* - * Save the cr4 feature set we're using (ie - * Pentium 4MB enable and PPro Global page - * enable), so that any CPU's that boot up - * after us can get the correct flags. - */ -extern unsigned long mmu_cr4_features; - -static inline void set_in_cr4 (unsigned long mask) -{ - mmu_cr4_features |= mask; - __asm__("movq %%cr4,%%rax\n\t" - "orq %0,%%rax\n\t" - "movq %%rax,%%cr4\n" - : : "irg" (mask) - :"ax"); -} - -static inline void clear_in_cr4 (unsigned long mask) -{ - mmu_cr4_features &= ~mask; - __asm__("movq %%cr4,%%rax\n\t" - "andq %0,%%rax\n\t" - "movq %%rax,%%cr4\n" - : : "irg" (~mask) - :"ax"); -} - /* * User space process size. 47bits minus one guard page. @@ -254,14 +226,6 @@ struct thread_struct { set_fs(USER_DS); \ } while(0) -#define get_debugreg(var, register) \ - __asm__("movq %%db" #register ", %0" \ - :"=r" (var)) -#define set_debugreg(value, register) \ - __asm__("movq %0,%%db" #register \ - : /* no output */ \ - :"r" (value)) - struct task_struct; struct mm_struct;