| #ifndef __ASM_X86_PROCESSOR_H |
| #define __ASM_X86_PROCESSOR_H |
| |
| #include <asm/processor-flags.h> |
| |
| /* migration helper, for KVM - will be removed in 2.6.25: */ |
| #define Xgt_desc_struct desc_ptr |
| |
| /* Forward declaration, a strange C thing */ |
| struct task_struct; |
| struct mm_struct; |
| |
| #include <asm/vm86.h> |
| #include <asm/math_emu.h> |
| #include <asm/segment.h> |
| #include <asm/types.h> |
| #include <asm/sigcontext.h> |
| #include <asm/current.h> |
| #include <asm/cpufeature.h> |
| #include <asm/system.h> |
| #include <asm/page.h> |
| #include <asm/percpu.h> |
| #include <asm/msr.h> |
| #include <asm/desc_defs.h> |
| #include <asm/nops.h> |
| |
| #include <linux/personality.h> |
| #include <linux/cpumask.h> |
| #include <linux/cache.h> |
| #include <linux/threads.h> |
| #include <linux/init.h> |
| |
| /* |
| * Default implementation of macro that returns current |
| * instruction pointer ("program counter"). |
| */ |
| static inline void *current_text_addr(void) |
| { |
| void *pc; |
| |
| asm volatile("mov $1f, %0; 1:":"=r" (pc)); |
| |
| return pc; |
| } |
| |
| #ifdef CONFIG_X86_VSMP |
| # define ARCH_MIN_TASKALIGN (1 << INTERNODE_CACHE_SHIFT) |
| # define ARCH_MIN_MMSTRUCT_ALIGN (1 << INTERNODE_CACHE_SHIFT) |
| #else |
| # define ARCH_MIN_TASKALIGN 16 |
| # define ARCH_MIN_MMSTRUCT_ALIGN 0 |
| #endif |
| |
| /* |
| * CPU type and hardware bug flags. Kept separately for each CPU. |
| * Members of this structure are referenced in head.S, so think twice |
| * before touching them. [mj] |
| */ |
| |
| struct cpuinfo_x86 { |
| __u8 x86; /* CPU family */ |
| __u8 x86_vendor; /* CPU vendor */ |
| __u8 x86_model; |
| __u8 x86_mask; |
| #ifdef CONFIG_X86_32 |
| char wp_works_ok; /* It doesn't on 386's */ |
| |
| /* Problems on some 486Dx4's and old 386's: */ |
| char hlt_works_ok; |
| char hard_math; |
| char rfu; |
| char fdiv_bug; |
| char f00f_bug; |
| char coma_bug; |
| char pad0; |
| #else |
| /* Number of 4K pages in DTLB/ITLB combined(in pages): */ |
| int x86_tlbsize; |
| __u8 x86_virt_bits; |
| __u8 x86_phys_bits; |
| /* CPUID returned core id bits: */ |
| __u8 x86_coreid_bits; |
| /* Max extended CPUID function supported: */ |
| __u32 extended_cpuid_level; |
| #endif |
| /* Maximum supported CPUID level, -1=no CPUID: */ |
| int cpuid_level; |
| __u32 x86_capability[NCAPINTS]; |
| char x86_vendor_id[16]; |
| char x86_model_id[64]; |
| /* in KB - valid for CPUS which support this call: */ |
| int x86_cache_size; |
| int x86_cache_alignment; /* In bytes */ |
| int x86_power; |
| unsigned long loops_per_jiffy; |
| #ifdef CONFIG_SMP |
| /* cpus sharing the last level cache: */ |
| cpumask_t llc_shared_map; |
| #endif |
| /* cpuid returned max cores value: */ |
| u16 x86_max_cores; |
| u16 apicid; |
| u16 initial_apicid; |
| u16 x86_clflush_size; |
| #ifdef CONFIG_SMP |
| /* number of cores as seen by the OS: */ |
| u16 booted_cores; |
| /* Physical processor id: */ |
| u16 phys_proc_id; |
| /* Core id: */ |
| u16 cpu_core_id; |
| /* Index into per_cpu list: */ |
| u16 cpu_index; |
| #endif |
| } __attribute__((__aligned__(SMP_CACHE_BYTES))); |
| |
| #define X86_VENDOR_INTEL 0 |
| #define X86_VENDOR_CYRIX 1 |
| #define X86_VENDOR_AMD 2 |
| #define X86_VENDOR_UMC 3 |
| #define X86_VENDOR_CENTAUR 5 |
| #define X86_VENDOR_TRANSMETA 7 |
| #define X86_VENDOR_NSC 8 |
| #define X86_VENDOR_NUM 9 |
| |
| #define X86_VENDOR_UNKNOWN 0xff |
| |
| /* |
| * capabilities of CPUs |
| */ |
| extern struct cpuinfo_x86 boot_cpu_data; |
| extern struct cpuinfo_x86 new_cpu_data; |
| |
| extern struct tss_struct doublefault_tss; |
| extern __u32 cleared_cpu_caps[NCAPINTS]; |
| |
| #ifdef CONFIG_SMP |
| DECLARE_PER_CPU(struct cpuinfo_x86, cpu_info); |
| #define cpu_data(cpu) per_cpu(cpu_info, cpu) |
| #define current_cpu_data cpu_data(smp_processor_id()) |
| #else |
| #define cpu_data(cpu) boot_cpu_data |
| #define current_cpu_data boot_cpu_data |
| #endif |
| |
| static inline int hlt_works(int cpu) |
| { |
| #ifdef CONFIG_X86_32 |
| return cpu_data(cpu).hlt_works_ok; |
| #else |
| return 1; |
| #endif |
| } |
| |
| #define cache_line_size() (boot_cpu_data.x86_cache_alignment) |
| |
| extern void cpu_detect(struct cpuinfo_x86 *c); |
| |
| extern void identify_cpu(struct cpuinfo_x86 *); |
| extern void identify_boot_cpu(void); |
| extern void identify_secondary_cpu(struct cpuinfo_x86 *); |
| extern void print_cpu_info(struct cpuinfo_x86 *); |
| 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; |
| |
| #if defined(CONFIG_X86_HT) || defined(CONFIG_X86_64) |
| extern void detect_ht(struct cpuinfo_x86 *c); |
| #else |
| static inline void detect_ht(struct cpuinfo_x86 *c) {} |
| #endif |
| |
| static inline void native_cpuid(unsigned int *eax, unsigned int *ebx, |
| unsigned int *ecx, unsigned int *edx) |
| { |
| /* ecx is often an input as well as an output. */ |
| asm("cpuid" |
| : "=a" (*eax), |
| "=b" (*ebx), |
| "=c" (*ecx), |
| "=d" (*edx) |
| : "0" (*eax), "2" (*ecx)); |
| } |
| |
| static inline void load_cr3(pgd_t *pgdir) |
| { |
| write_cr3(__pa(pgdir)); |
| } |
| |
| #ifdef CONFIG_X86_32 |
| /* This is the TSS defined by the hardware. */ |
| struct x86_hw_tss { |
| unsigned short back_link, __blh; |
| unsigned long sp0; |
| unsigned short ss0, __ss0h; |
| unsigned long sp1; |
| /* ss1 caches MSR_IA32_SYSENTER_CS: */ |
| unsigned short ss1, __ss1h; |
| unsigned long sp2; |
| unsigned short ss2, __ss2h; |
| unsigned long __cr3; |
| unsigned long ip; |
| unsigned long flags; |
| unsigned long ax; |
| unsigned long cx; |
| unsigned long dx; |
| unsigned long bx; |
| unsigned long sp; |
| unsigned long bp; |
| unsigned long si; |
| unsigned long di; |
| unsigned short es, __esh; |
| unsigned short cs, __csh; |
| unsigned short ss, __ssh; |
| unsigned short ds, __dsh; |
| unsigned short fs, __fsh; |
| unsigned short gs, __gsh; |
| unsigned short ldt, __ldth; |
| unsigned short trace; |
| unsigned short io_bitmap_base; |
| |
| } __attribute__((packed)); |
| #else |
| struct x86_hw_tss { |
| u32 reserved1; |
| u64 sp0; |
| u64 sp1; |
| u64 sp2; |
| u64 reserved2; |
| u64 ist[7]; |
| u32 reserved3; |
| u32 reserved4; |
| u16 reserved5; |
| u16 io_bitmap_base; |
| |
| } __attribute__((packed)) ____cacheline_aligned; |
| #endif |
| |
| /* |
| * IO-bitmap sizes: |
| */ |
| #define IO_BITMAP_BITS 65536 |
| #define IO_BITMAP_BYTES (IO_BITMAP_BITS/8) |
| #define IO_BITMAP_LONGS (IO_BITMAP_BYTES/sizeof(long)) |
| #define IO_BITMAP_OFFSET offsetof(struct tss_struct, io_bitmap) |
| #define INVALID_IO_BITMAP_OFFSET 0x8000 |
| #define INVALID_IO_BITMAP_OFFSET_LAZY 0x9000 |
| |
| struct tss_struct { |
| /* |
| * The hardware state: |
| */ |
| struct x86_hw_tss x86_tss; |
| |
| /* |
| * The extra 1 is there because the CPU will access an |
| * additional byte beyond the end of the IO permission |
| * bitmap. The extra byte must be all 1 bits, and must |
| * be within the limit. |
| */ |
| unsigned long io_bitmap[IO_BITMAP_LONGS + 1]; |
| /* |
| * Cache the current maximum and the last task that used the bitmap: |
| */ |
| unsigned long io_bitmap_max; |
| struct thread_struct *io_bitmap_owner; |
| |
| /* |
| * Pad the TSS to be cacheline-aligned (size is 0x100): |
| */ |
| unsigned long __cacheline_filler[35]; |
| /* |
| * .. and then another 0x100 bytes for the emergency kernel stack: |
| */ |
| unsigned long stack[64]; |
| |
| } __attribute__((packed)); |
| |
| DECLARE_PER_CPU(struct tss_struct, init_tss); |
| |
| /* |
| * Save the original ist values for checking stack pointers during debugging |
| */ |
| struct orig_ist { |
| unsigned long ist[7]; |
| }; |
| |
| #define MXCSR_DEFAULT 0x1f80 |
| |
| struct i387_fsave_struct { |
| u32 cwd; /* FPU Control Word */ |
| u32 swd; /* FPU Status Word */ |
| u32 twd; /* FPU Tag Word */ |
| u32 fip; /* FPU IP Offset */ |
| u32 fcs; /* FPU IP Selector */ |
| u32 foo; /* FPU Operand Pointer Offset */ |
| u32 fos; /* FPU Operand Pointer Selector */ |
| |
| /* 8*10 bytes for each FP-reg = 80 bytes: */ |
| u32 st_space[20]; |
| |
| /* Software status information [not touched by FSAVE ]: */ |
| u32 status; |
| }; |
| |
| struct i387_fxsave_struct { |
| u16 cwd; /* Control Word */ |
| u16 swd; /* Status Word */ |
| u16 twd; /* Tag Word */ |
| u16 fop; /* Last Instruction Opcode */ |
| union { |
| struct { |
| u64 rip; /* Instruction Pointer */ |
| u64 rdp; /* Data Pointer */ |
| }; |
| struct { |
| u32 fip; /* FPU IP Offset */ |
| u32 fcs; /* FPU IP Selector */ |
| u32 foo; /* FPU Operand Offset */ |
| u32 fos; /* FPU Operand Selector */ |
| }; |
| }; |
| u32 mxcsr; /* MXCSR Register State */ |
| u32 mxcsr_mask; /* MXCSR Mask */ |
| |
| /* 8*16 bytes for each FP-reg = 128 bytes: */ |
| u32 st_space[32]; |
| |
| /* 16*16 bytes for each XMM-reg = 256 bytes: */ |
| u32 xmm_space[64]; |
| |
| u32 padding[24]; |
| |
| } __attribute__((aligned(16))); |
| |
| struct i387_soft_struct { |
| u32 cwd; |
| u32 swd; |
| u32 twd; |
| u32 fip; |
| u32 fcs; |
| u32 foo; |
| u32 fos; |
| /* 8*10 bytes for each FP-reg = 80 bytes: */ |
| u32 st_space[20]; |
| u8 ftop; |
| u8 changed; |
| u8 lookahead; |
| u8 no_update; |
| u8 rm; |
| u8 alimit; |
| struct info *info; |
| u32 entry_eip; |
| }; |
| |
| union thread_xstate { |
| struct i387_fsave_struct fsave; |
| struct i387_fxsave_struct fxsave; |
| struct i387_soft_struct soft; |
| }; |
| |
| #ifdef CONFIG_X86_64 |
| DECLARE_PER_CPU(struct orig_ist, orig_ist); |
| #endif |
| |
| extern void print_cpu_info(struct cpuinfo_x86 *); |
| extern unsigned int xstate_size; |
| extern void free_thread_xstate(struct task_struct *); |
| extern struct kmem_cache *task_xstate_cachep; |
| 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; |
| |
| struct thread_struct { |
| /* Cached TLS descriptors: */ |
| struct desc_struct tls_array[GDT_ENTRY_TLS_ENTRIES]; |
| unsigned long sp0; |
| unsigned long sp; |
| #ifdef CONFIG_X86_32 |
| unsigned long sysenter_cs; |
| #else |
| unsigned long usersp; /* Copy from PDA */ |
| unsigned short es; |
| unsigned short ds; |
| unsigned short fsindex; |
| unsigned short gsindex; |
| #endif |
| unsigned long ip; |
| unsigned long fs; |
| unsigned long gs; |
| /* Hardware debugging registers: */ |
| unsigned long debugreg0; |
| unsigned long debugreg1; |
| unsigned long debugreg2; |
| unsigned long debugreg3; |
| unsigned long debugreg6; |
| unsigned long debugreg7; |
| /* Fault info: */ |
| unsigned long cr2; |
| unsigned long trap_no; |
| unsigned long error_code; |
| /* floating point and extended processor state */ |
| union thread_xstate *xstate; |
| #ifdef CONFIG_X86_32 |
| /* Virtual 86 mode info */ |
| struct vm86_struct __user *vm86_info; |
| unsigned long screen_bitmap; |
| unsigned long v86flags; |
| unsigned long v86mask; |
| unsigned long saved_sp0; |
| unsigned int saved_fs; |
| unsigned int saved_gs; |
| #endif |
| /* IO permissions: */ |
| unsigned long *io_bitmap_ptr; |
| unsigned long iopl; |
| /* Max allowed port in the bitmap, in bytes: */ |
| unsigned io_bitmap_max; |
| /* MSR_IA32_DEBUGCTLMSR value to switch in if TIF_DEBUGCTLMSR is set. */ |
| unsigned long debugctlmsr; |
| /* Debug Store - if not 0 points to a DS Save Area configuration; |
| * goes into MSR_IA32_DS_AREA */ |
| unsigned long ds_area_msr; |
| }; |
| |
| 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" ::"r" (value)); |
| break; |
| case 1: |
| asm("mov %0, %%db1" ::"r" (value)); |
| break; |
| case 2: |
| asm("mov %0, %%db2" ::"r" (value)); |
| break; |
| case 3: |
| asm("mov %0, %%db3" ::"r" (value)); |
| break; |
| case 6: |
| asm("mov %0, %%db6" ::"r" (value)); |
| break; |
| case 7: |
| asm("mov %0, %%db7" ::"r" (value)); |
| break; |
| default: |
| BUG(); |
| } |
| } |
| |
| /* |
| * Set IOPL bits in EFLAGS from given mask |
| */ |
| static inline void native_set_iopl_mask(unsigned mask) |
| { |
| #ifdef CONFIG_X86_32 |
| unsigned int reg; |
| |
| asm volatile ("pushfl;" |
| "popl %0;" |
| "andl %1, %0;" |
| "orl %2, %0;" |
| "pushl %0;" |
| "popfl" |
| : "=&r" (reg) |
| : "i" (~X86_EFLAGS_IOPL), "r" (mask)); |
| #endif |
| } |
| |
| static inline void |
| native_load_sp0(struct tss_struct *tss, struct thread_struct *thread) |
| { |
| tss->x86_tss.sp0 = thread->sp0; |
| #ifdef CONFIG_X86_32 |
| /* Only happens when SEP is enabled, no need to test "SEP"arately: */ |
| if (unlikely(tss->x86_tss.ss1 != thread->sysenter_cs)) { |
| tss->x86_tss.ss1 = thread->sysenter_cs; |
| wrmsr(MSR_IA32_SYSENTER_CS, thread->sysenter_cs, 0); |
| } |
| #endif |
| } |
| |
| static inline void native_swapgs(void) |
| { |
| #ifdef CONFIG_X86_64 |
| asm volatile("swapgs" ::: "memory"); |
| #endif |
| } |
| |
| #ifdef CONFIG_PARAVIRT |
| #include <asm/paravirt.h> |
| #else |
| #define __cpuid native_cpuid |
| #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) |
| |
| static inline void load_sp0(struct tss_struct *tss, |
| struct thread_struct *thread) |
| { |
| native_load_sp0(tss, thread); |
| } |
| |
| #define set_iopl_mask native_set_iopl_mask |
| #define SWAPGS swapgs |
| #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); |
| } |
| |
| struct microcode_header { |
| unsigned int hdrver; |
| unsigned int rev; |
| unsigned int date; |
| unsigned int sig; |
| unsigned int cksum; |
| unsigned int ldrver; |
| unsigned int pf; |
| unsigned int datasize; |
| unsigned int totalsize; |
| unsigned int reserved[3]; |
| }; |
| |
| struct microcode { |
| struct microcode_header hdr; |
| unsigned int bits[0]; |
| }; |
| |
| typedef struct microcode microcode_t; |
| typedef struct microcode_header microcode_header_t; |
| |
| /* microcode format is extended from prescott processors */ |
| struct extended_signature { |
| unsigned int sig; |
| unsigned int pf; |
| unsigned int cksum; |
| }; |
| |
| struct extended_sigtable { |
| unsigned int count; |
| unsigned int cksum; |
| unsigned int reserved[3]; |
| struct extended_signature sigs[0]; |
| }; |
| |
| typedef struct { |
| unsigned long seg; |
| } mm_segment_t; |
| |
| |
| /* |
| * create a kernel thread without removing it from tasklists |
| */ |
| extern int kernel_thread(int (*fn)(void *), void *arg, unsigned long flags); |
| |
| /* Free all resources held by a thread. */ |
| extern void release_thread(struct task_struct *); |
| |
| /* Prepare to copy thread state - unlazy all lazy state */ |
| extern void prepare_to_copy(struct task_struct *tsk); |
| |
| unsigned long get_wchan(struct task_struct *p); |
| |
| /* |
| * Generic CPUID function |
| * clear %ecx since some cpus (Cyrix MII) do not set or clear %ecx |
| * resulting in stale register contents being returned. |
| */ |
| static inline void cpuid(unsigned int op, |
| unsigned int *eax, unsigned int *ebx, |
| unsigned int *ecx, unsigned int *edx) |
| { |
| *eax = op; |
| *ecx = 0; |
| __cpuid(eax, ebx, ecx, edx); |
| } |
| |
| /* Some CPUID calls want 'count' to be placed in ecx */ |
| static inline void cpuid_count(unsigned int op, int count, |
| unsigned int *eax, unsigned int *ebx, |
| unsigned int *ecx, unsigned int *edx) |
| { |
| *eax = op; |
| *ecx = count; |
| __cpuid(eax, ebx, ecx, edx); |
| } |
| |
| /* |
| * CPUID functions returning a single datum |
| */ |
| static inline unsigned int cpuid_eax(unsigned int op) |
| { |
| unsigned int eax, ebx, ecx, edx; |
| |
| cpuid(op, &eax, &ebx, &ecx, &edx); |
| |
| return eax; |
| } |
| |
| static inline unsigned int cpuid_ebx(unsigned int op) |
| { |
| unsigned int eax, ebx, ecx, edx; |
| |
| cpuid(op, &eax, &ebx, &ecx, &edx); |
| |
| return ebx; |
| } |
| |
| static inline unsigned int cpuid_ecx(unsigned int op) |
| { |
| unsigned int eax, ebx, ecx, edx; |
| |
| cpuid(op, &eax, &ebx, &ecx, &edx); |
| |
| return ecx; |
| } |
| |
| static inline unsigned int cpuid_edx(unsigned int op) |
| { |
| unsigned int eax, ebx, ecx, edx; |
| |
| cpuid(op, &eax, &ebx, &ecx, &edx); |
| |
| return edx; |
| } |
| |
| /* REP NOP (PAUSE) is a good thing to insert into busy-wait loops. */ |
| static inline void rep_nop(void) |
| { |
| asm volatile("rep; nop" ::: "memory"); |
| } |
| |
| static inline void cpu_relax(void) |
| { |
| rep_nop(); |
| } |
| |
| /* Stop speculative execution: */ |
| static inline void sync_core(void) |
| { |
| int tmp; |
| |
| asm volatile("cpuid" : "=a" (tmp) : "0" (1) |
| : "ebx", "ecx", "edx", "memory"); |
| } |
| |
| static inline void __monitor(const void *eax, unsigned long ecx, |
| unsigned long edx) |
| { |
| /* "monitor %eax, %ecx, %edx;" */ |
| asm volatile(".byte 0x0f, 0x01, 0xc8;" |
| :: "a" (eax), "c" (ecx), "d"(edx)); |
| } |
| |
| static inline void __mwait(unsigned long eax, unsigned long ecx) |
| { |
| /* "mwait %eax, %ecx;" */ |
| asm volatile(".byte 0x0f, 0x01, 0xc9;" |
| :: "a" (eax), "c" (ecx)); |
| } |
| |
| static inline void __sti_mwait(unsigned long eax, unsigned long ecx) |
| { |
| /* "mwait %eax, %ecx;" */ |
| asm volatile("sti; .byte 0x0f, 0x01, 0xc9;" |
| :: "a" (eax), "c" (ecx)); |
| } |
| |
| extern void mwait_idle_with_hints(unsigned long eax, unsigned long ecx); |
| |
| extern int force_mwait; |
| |
| extern void select_idle_routine(const struct cpuinfo_x86 *c); |
| |
| extern unsigned long boot_option_idle_override; |
| |
| extern void enable_sep_cpu(void); |
| extern int sysenter_setup(void); |
| |
| /* Defined in head.S */ |
| extern struct desc_ptr early_gdt_descr; |
| |
| extern void cpu_set_gdt(int); |
| extern void switch_to_new_gdt(void); |
| extern void cpu_init(void); |
| extern void init_gdt(int cpu); |
| |
| static inline void update_debugctlmsr(unsigned long debugctlmsr) |
| { |
| #ifndef CONFIG_X86_DEBUGCTLMSR |
| if (boot_cpu_data.x86 < 6) |
| return; |
| #endif |
| wrmsrl(MSR_IA32_DEBUGCTLMSR, debugctlmsr); |
| } |
| |
| /* |
| * from system description table in BIOS. Mostly for MCA use, but |
| * others may find it useful: |
| */ |
| extern unsigned int machine_id; |
| extern unsigned int machine_submodel_id; |
| extern unsigned int BIOS_revision; |
| |
| /* Boot loader type from the setup header: */ |
| extern int bootloader_type; |
| |
| extern char ignore_fpu_irq; |
| |
| #define HAVE_ARCH_PICK_MMAP_LAYOUT 1 |
| #define ARCH_HAS_PREFETCHW |
| #define ARCH_HAS_SPINLOCK_PREFETCH |
| |
| #ifdef CONFIG_X86_32 |
| # define BASE_PREFETCH ASM_NOP4 |
| # define ARCH_HAS_PREFETCH |
| #else |
| # define BASE_PREFETCH "prefetcht0 (%1)" |
| #endif |
| |
| /* |
| * Prefetch instructions for Pentium III (+) and AMD Athlon (+) |
| * |
| * It's not worth to care about 3dnow prefetches for the K6 |
| * because they are microcoded there and very slow. |
| */ |
| static inline void prefetch(const void *x) |
| { |
| alternative_input(BASE_PREFETCH, |
| "prefetchnta (%1)", |
| X86_FEATURE_XMM, |
| "r" (x)); |
| } |
| |
| /* |
| * 3dnow prefetch to get an exclusive cache line. |
| * Useful for spinlocks to avoid one state transition in the |
| * cache coherency protocol: |
| */ |
| static inline void prefetchw(const void *x) |
| { |
| alternative_input(BASE_PREFETCH, |
| "prefetchw (%1)", |
| X86_FEATURE_3DNOW, |
| "r" (x)); |
| } |
| |
| static inline void spin_lock_prefetch(const void *x) |
| { |
| prefetchw(x); |
| } |
| |
| #ifdef CONFIG_X86_32 |
| /* |
| * User space process size: 3GB (default). |
| */ |
| #define TASK_SIZE PAGE_OFFSET |
| #define STACK_TOP TASK_SIZE |
| #define STACK_TOP_MAX STACK_TOP |
| |
| #define INIT_THREAD { \ |
| .sp0 = sizeof(init_stack) + (long)&init_stack, \ |
| .vm86_info = NULL, \ |
| .sysenter_cs = __KERNEL_CS, \ |
| .io_bitmap_ptr = NULL, \ |
| .fs = __KERNEL_PERCPU, \ |
| } |
| |
| /* |
| * Note that the .io_bitmap member must be extra-big. This is because |
| * the CPU will access an additional byte beyond the end of the IO |
| * permission bitmap. The extra byte must be all 1 bits, and must |
| * be within the limit. |
| */ |
| #define INIT_TSS { \ |
| .x86_tss = { \ |
| .sp0 = sizeof(init_stack) + (long)&init_stack, \ |
| .ss0 = __KERNEL_DS, \ |
| .ss1 = __KERNEL_CS, \ |
| .io_bitmap_base = INVALID_IO_BITMAP_OFFSET, \ |
| }, \ |
| .io_bitmap = { [0 ... IO_BITMAP_LONGS] = ~0 }, \ |
| } |
| |
| extern unsigned long thread_saved_pc(struct task_struct *tsk); |
| |
| #define THREAD_SIZE_LONGS (THREAD_SIZE/sizeof(unsigned long)) |
| #define KSTK_TOP(info) \ |
| ({ \ |
| unsigned long *__ptr = (unsigned long *)(info); \ |
| (unsigned long)(&__ptr[THREAD_SIZE_LONGS]); \ |
| }) |
| |
| /* |
| * The below -8 is to reserve 8 bytes on top of the ring0 stack. |
| * This is necessary to guarantee that the entire "struct pt_regs" |
| * is accessable even if the CPU haven't stored the SS/ESP registers |
| * on the stack (interrupt gate does not save these registers |
| * when switching to the same priv ring). |
| * Therefore beware: accessing the ss/esp fields of the |
| * "struct pt_regs" is possible, but they may contain the |
| * completely wrong values. |
| */ |
| #define task_pt_regs(task) \ |
| ({ \ |
| struct pt_regs *__regs__; \ |
| __regs__ = (struct pt_regs *)(KSTK_TOP(task_stack_page(task))-8); \ |
| __regs__ - 1; \ |
| }) |
| |
| #define KSTK_ESP(task) (task_pt_regs(task)->sp) |
| |
| #else |
| /* |
| * User space process size. 47bits minus one guard page. |
| */ |
| #define TASK_SIZE64 ((1UL << 47) - PAGE_SIZE) |
| |
| /* This decides where the kernel will search for a free chunk of vm |
| * space during mmap's. |
| */ |
| #define IA32_PAGE_OFFSET ((current->personality & ADDR_LIMIT_3GB) ? \ |
| 0xc0000000 : 0xFFFFe000) |
| |
| #define TASK_SIZE (test_thread_flag(TIF_IA32) ? \ |
| IA32_PAGE_OFFSET : TASK_SIZE64) |
| #define TASK_SIZE_OF(child) ((test_tsk_thread_flag(child, TIF_IA32)) ? \ |
| IA32_PAGE_OFFSET : TASK_SIZE64) |
| |
| #define STACK_TOP TASK_SIZE |
| #define STACK_TOP_MAX TASK_SIZE64 |
| |
| #define INIT_THREAD { \ |
| .sp0 = (unsigned long)&init_stack + sizeof(init_stack) \ |
| } |
| |
| #define INIT_TSS { \ |
| .x86_tss.sp0 = (unsigned long)&init_stack + sizeof(init_stack) \ |
| } |
| |
| /* |
| * Return saved PC of a blocked thread. |
| * What is this good for? it will be always the scheduler or ret_from_fork. |
| */ |
| #define thread_saved_pc(t) (*(unsigned long *)((t)->thread.sp - 8)) |
| |
| #define task_pt_regs(tsk) ((struct pt_regs *)(tsk)->thread.sp0 - 1) |
| #define KSTK_ESP(tsk) -1 /* sorry. doesn't work for syscall. */ |
| #endif /* CONFIG_X86_64 */ |
| |
| extern void start_thread(struct pt_regs *regs, unsigned long new_ip, |
| unsigned long new_sp); |
| |
| /* |
| * This decides where the kernel will search for a free chunk of vm |
| * space during mmap's. |
| */ |
| #define TASK_UNMAPPED_BASE (PAGE_ALIGN(TASK_SIZE / 3)) |
| |
| #define KSTK_EIP(task) (task_pt_regs(task)->ip) |
| |
| /* Get/set a process' ability to use the timestamp counter instruction */ |
| #define GET_TSC_CTL(adr) get_tsc_mode((adr)) |
| #define SET_TSC_CTL(val) set_tsc_mode((val)) |
| |
| extern int get_tsc_mode(unsigned long adr); |
| extern int set_tsc_mode(unsigned int val); |
| |
| #endif |