processor.h

xen虚拟机源代码安装包

/* Portions are: Copyright (c) 1994 Linus Torvalds */

#ifndef __ASM_X86_PROCESSOR_H
#define __ASM_X86_PROCESSOR_H

#ifndef __ASSEMBLY__
#include <xen/config.h>
#include <xen/cache.h>
#include <xen/types.h>
#include <xen/smp.h>
#include <xen/percpu.h>
#include <public/xen.h>
#include <asm/types.h>
#include <asm/cpufeature.h>
#include <asm/desc.h>
#endif

/*
 * CPU vendor IDs
 */
#define X86_VENDOR_INTEL 0
#define X86_VENDOR_CYRIX 1
#define X86_VENDOR_AMD 2
#define X86_VENDOR_UMC 3
#define X86_VENDOR_NEXGEN 4
#define X86_VENDOR_CENTAUR 5
#define X86_VENDOR_RISE 6
#define X86_VENDOR_TRANSMETA 7
#define X86_VENDOR_NSC 8
#define X86_VENDOR_NUM 9
#define X86_VENDOR_UNKNOWN 0xff

/*
 * EFLAGS bits
 */
#define X86_EFLAGS_CF	0x00000001 /* Carry Flag */
#define X86_EFLAGS_PF	0x00000004 /* Parity Flag */
#define X86_EFLAGS_AF	0x00000010 /* Auxillary carry Flag */
#define X86_EFLAGS_ZF	0x00000040 /* Zero Flag */
#define X86_EFLAGS_SF	0x00000080 /* Sign Flag */
#define X86_EFLAGS_TF	0x00000100 /* Trap Flag */
#define X86_EFLAGS_IF	0x00000200 /* Interrupt Flag */
#define X86_EFLAGS_DF	0x00000400 /* Direction Flag */
#define X86_EFLAGS_OF	0x00000800 /* Overflow Flag */
#define X86_EFLAGS_IOPL	0x00003000 /* IOPL mask */
#define X86_EFLAGS_NT	0x00004000 /* Nested Task */
#define X86_EFLAGS_RF	0x00010000 /* Resume Flag */
#define X86_EFLAGS_VM	0x00020000 /* Virtual Mode */
#define X86_EFLAGS_AC	0x00040000 /* Alignment Check */
#define X86_EFLAGS_VIF	0x00080000 /* Virtual Interrupt Flag */
#define X86_EFLAGS_VIP	0x00100000 /* Virtual Interrupt Pending */
#define X86_EFLAGS_ID	0x00200000 /* CPUID detection flag */

/*
 * Intel CPU flags in CR0
 */
#define X86_CR0_PE              0x00000001 /* Enable Protected Mode    (RW) */
#define X86_CR0_MP              0x00000002 /* Monitor Coprocessor      (RW) */
#define X86_CR0_EM              0x00000004 /* Require FPU Emulation    (RO) */
#define X86_CR0_TS              0x00000008 /* Task Switched            (RW) */
#define X86_CR0_ET              0x00000010 /* Extension type           (RO) */
#define X86_CR0_NE              0x00000020 /* Numeric Error Reporting  (RW) */
#define X86_CR0_WP              0x00010000 /* Supervisor Write Protect (RW) */
#define X86_CR0_AM              0x00040000 /* Alignment Checking       (RW) */
#define X86_CR0_NW              0x20000000 /* Not Write-Through        (RW) */
#define X86_CR0_CD              0x40000000 /* Cache Disable            (RW) */
#define X86_CR0_PG              0x80000000 /* Paging                   (RW) */

/*
 * Intel CPU features in CR4
 */
#define X86_CR4_VME		0x0001	/* enable vm86 extensions */
#define X86_CR4_PVI		0x0002	/* virtual interrupts flag enable */
#define X86_CR4_TSD		0x0004	/* disable time stamp at ipl 3 */
#define X86_CR4_DE		0x0008	/* enable debugging extensions */
#define X86_CR4_PSE		0x0010	/* enable page size extensions */
#define X86_CR4_PAE		0x0020	/* enable physical address extensions */
#define X86_CR4_MCE		0x0040	/* Machine check enable */
#define X86_CR4_PGE		0x0080	/* enable global pages */
#define X86_CR4_PCE		0x0100	/* enable performance counters at ipl 3 */
#define X86_CR4_OSFXSR		0x0200	/* enable fast FPU save and restore */
#define X86_CR4_OSXMMEXCPT	0x0400	/* enable unmasked SSE exceptions */
#define X86_CR4_VMXE		0x2000  /* enable VMX */
#define X86_CR4_SMXE		0x4000  /* enable SMX */

/*
 * Trap/fault mnemonics.
 */
#define TRAP_divide_error      0
#define TRAP_debug             1
#define TRAP_nmi               2
#define TRAP_int3              3
#define TRAP_overflow          4
#define TRAP_bounds            5
#define TRAP_invalid_op        6
#define TRAP_no_device         7
#define TRAP_double_fault      8
#define TRAP_copro_seg         9
#define TRAP_invalid_tss      10
#define TRAP_no_segment       11
#define TRAP_stack_error      12
#define TRAP_gp_fault         13
#define TRAP_page_fault       14
#define TRAP_spurious_int     15
#define TRAP_copro_error      16
#define TRAP_alignment_check  17
#define TRAP_machine_check    18
#define TRAP_simd_error       19

/* Set for entry via SYSCALL. Informs return code to use SYSRETQ not IRETQ. */
/* NB. Same as VGCF_in_syscall. No bits in common with any other TRAP_ defn. */
#define TRAP_syscall         256

/* Boolean return code: the reason for a fault has been fixed. */
#define EXCRET_fault_fixed 1

/* 'trap_bounce' flags values */
#define TBF_EXCEPTION          1
#define TBF_EXCEPTION_ERRCODE  2
#define TBF_INTERRUPT          8
#define TBF_FAILSAFE          16

/* 'arch_vcpu' flags values */
#define _TF_kernel_mode        0
#define TF_kernel_mode         (1<<_TF_kernel_mode)

/* #PF error code values. */
#define PFEC_page_present   (1U<<0)
#define PFEC_write_access   (1U<<1)
#define PFEC_user_mode      (1U<<2)
#define PFEC_reserved_bit   (1U<<3)
#define PFEC_insn_fetch     (1U<<4)

#ifndef __ASSEMBLY__

struct domain;
struct vcpu;

/*
 * Default implementation of macro that returns current
 * instruction pointer ("program counter").
 */
#ifdef __x86_64__
#define current_text_addr() ({                      \
    void *pc;                                       \
    asm ( "leaq 1f(%%rip),%0\n1:" : "=r" (pc) );    \
    pc;                                             \
})
#else
#define current_text_addr() ({                  \
    void *pc;                                   \
    asm ( "movl $1f,%0\n1:" : "=g" (pc) );      \
    pc;                                         \
})
#endif

struct cpuinfo_x86 {
    __u8 x86;            /* CPU family */
    __u8 x86_vendor;     /* CPU vendor */
    __u8 x86_model;
    __u8 x86_mask;
    int  cpuid_level;    /* Maximum supported CPUID level, -1=no CPUID */
    unsigned int x86_capability[NCAPINTS];
    char x86_vendor_id[16];
    char x86_model_id[64];
    int  x86_cache_size; /* in KB - valid for CPUS which support this call  */
    int  x86_cache_alignment;    /* In bytes */
    int  x86_power;
    __u32 x86_max_cores; /* cpuid returned max cores value */
    __u32 booted_cores;  /* number of cores as seen by OS */
    __u32 apicid;
    unsigned short x86_clflush_size;
} __cacheline_aligned;

/*
 * capabilities of CPUs
 */

extern struct cpuinfo_x86 boot_cpu_data;

#ifdef CONFIG_SMP
extern struct cpuinfo_x86 cpu_data[];
#define current_cpu_data cpu_data[smp_processor_id()]
#else
#define cpu_data (&boot_cpu_data)
#define current_cpu_data boot_cpu_data
#endif

extern int phys_proc_id[NR_CPUS];
extern int cpu_core_id[NR_CPUS];

extern void identify_cpu(struct cpuinfo_x86 *);
extern void print_cpu_info(struct cpuinfo_x86 *);
extern unsigned int init_intel_cacheinfo(struct cpuinfo_x86 *c);
extern void dodgy_tsc(void);

#ifdef CONFIG_X86_HT
extern void detect_ht(struct cpuinfo_x86 *c);
#else
static always_inline void detect_ht(struct cpuinfo_x86 *c) {}
#endif

/*
 * Generic CPUID function
 * clear %ecx since some cpus (Cyrix MII) do not set or clear %ecx
 * resulting in stale register contents being returned.
 */
#define cpuid(_op,_eax,_ebx,_ecx,_edx)          \
    asm ( "cpuid"                               \
          : "=a" (*(int *)(_eax)),              \
            "=b" (*(int *)(_ebx)),              \
            "=c" (*(int *)(_ecx)),              \
            "=d" (*(int *)(_edx))               \
          : "0" (_op), "2" (0) )

/* Some CPUID calls want 'count' to be placed in ecx */
static inline void cpuid_count(
    int op,
    int count,
    unsigned int *eax,
    unsigned int *ebx,
    unsigned int *ecx,
    unsigned int *edx)
{
    asm ( "cpuid"
          : "=a" (*eax), "=b" (*ebx), "=c" (*ecx), "=d" (*edx)
          : "0" (op), "c" (count) );
}

/*
 * CPUID functions returning a single datum
 */
static always_inline unsigned int cpuid_eax(unsigned int op)
{
    unsigned int eax;

    asm ( "cpuid"
          : "=a" (eax)
          : "0" (op)
          : "bx", "cx", "dx" );
    return eax;
}

static always_inline unsigned int cpuid_ebx(unsigned int op)
{
    unsigned int eax, ebx;

    asm ( "cpuid"
          : "=a" (eax), "=b" (ebx)
          : "0" (op)
          : "cx", "dx" );
    return ebx;
}

static always_inline unsigned int cpuid_ecx(unsigned int op)
{
    unsigned int eax, ecx;

    asm ( "cpuid"
          : "=a" (eax), "=c" (ecx)
          : "0" (op)
          : "bx", "dx" );
    return ecx;
}

static always_inline unsigned int cpuid_edx(unsigned int op)
{
    unsigned int eax, edx;

    asm ( "cpuid"
          : "=a" (eax), "=d" (edx)
          : "0" (op)
          : "bx", "cx" );
    return edx;
}

static inline unsigned long read_cr0(void)
{
    unsigned long cr0;
    asm volatile ( "mov %%cr0,%0\n\t" : "=r" (cr0) );
    return cr0;
} 

static inline void write_cr0(unsigned long val)
{
    asm volatile ( "mov %0,%%cr0" : : "r" ((unsigned long)val) );
}

static inline unsigned long read_cr2(void)
{
    unsigned long cr2;
    asm volatile ( "mov %%cr2,%0\n\t" : "=r" (cr2) );
    return cr2;
}

DECLARE_PER_CPU(unsigned long, cr4);

static inline unsigned long read_cr4(void)
{