95ffa2438d
some BIOS like to use continus MTRR layout, and X driver can not add
WB entries for graphical cards when 4g or more RAM installed.
the patch will change MTRR to discrete.
mtrr_chunk_size= could be used to have smaller continuous block to hold holes.
default is 256m, could be set according to size of graphics card memory.
mtrr_gran_size= could be used to send smallest mtrr block to avoid run out of MTRRs
v2: fix -1 for UC checking
v3: default to disable, and need use enable_mtrr_cleanup to enable this feature
skip the var state change warning.
remove next_basek in range_to_mtrr()
v4: correct warning mask.
v5: CONFIG_MTRR_SANITIZER
v6: fix 1g, 2g, 512 aligment with extra hole
v7: gran_sizek to prevent running out of MTRRs.
v8: fix hole_basek caculation caused when removing next_basek
gran_sizek using when basek is 0.
need to apply
[PATCH] x86: fix trimming e820 with MTRR holes.
right after this one.
Signed-off-by: Yinghai Lu <yhlu.kernel@gmail.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
107 lines
2.8 KiB
C
107 lines
2.8 KiB
C
/*
|
|
* local mtrr defines.
|
|
*/
|
|
|
|
#include <linux/types.h>
|
|
#include <linux/stddef.h>
|
|
|
|
#define MTRRcap_MSR 0x0fe
|
|
#define MTRRdefType_MSR 0x2ff
|
|
|
|
#define MTRRphysBase_MSR(reg) (0x200 + 2 * (reg))
|
|
#define MTRRphysMask_MSR(reg) (0x200 + 2 * (reg) + 1)
|
|
|
|
#define NUM_FIXED_RANGES 88
|
|
#define MAX_VAR_RANGES 256
|
|
#define MTRRfix64K_00000_MSR 0x250
|
|
#define MTRRfix16K_80000_MSR 0x258
|
|
#define MTRRfix16K_A0000_MSR 0x259
|
|
#define MTRRfix4K_C0000_MSR 0x268
|
|
#define MTRRfix4K_C8000_MSR 0x269
|
|
#define MTRRfix4K_D0000_MSR 0x26a
|
|
#define MTRRfix4K_D8000_MSR 0x26b
|
|
#define MTRRfix4K_E0000_MSR 0x26c
|
|
#define MTRRfix4K_E8000_MSR 0x26d
|
|
#define MTRRfix4K_F0000_MSR 0x26e
|
|
#define MTRRfix4K_F8000_MSR 0x26f
|
|
|
|
#define MTRR_CHANGE_MASK_FIXED 0x01
|
|
#define MTRR_CHANGE_MASK_VARIABLE 0x02
|
|
#define MTRR_CHANGE_MASK_DEFTYPE 0x04
|
|
|
|
/* In the Intel processor's MTRR interface, the MTRR type is always held in
|
|
an 8 bit field: */
|
|
typedef u8 mtrr_type;
|
|
|
|
extern unsigned int mtrr_usage_table[MAX_VAR_RANGES];
|
|
|
|
struct mtrr_ops {
|
|
u32 vendor;
|
|
u32 use_intel_if;
|
|
// void (*init)(void);
|
|
void (*set)(unsigned int reg, unsigned long base,
|
|
unsigned long size, mtrr_type type);
|
|
void (*set_all)(void);
|
|
|
|
void (*get)(unsigned int reg, unsigned long *base,
|
|
unsigned long *size, mtrr_type * type);
|
|
int (*get_free_region)(unsigned long base, unsigned long size,
|
|
int replace_reg);
|
|
int (*validate_add_page)(unsigned long base, unsigned long size,
|
|
unsigned int type);
|
|
int (*have_wrcomb)(void);
|
|
};
|
|
|
|
extern int generic_get_free_region(unsigned long base, unsigned long size,
|
|
int replace_reg);
|
|
extern int generic_validate_add_page(unsigned long base, unsigned long size,
|
|
unsigned int type);
|
|
|
|
extern struct mtrr_ops generic_mtrr_ops;
|
|
|
|
extern int positive_have_wrcomb(void);
|
|
|
|
/* library functions for processor-specific routines */
|
|
struct set_mtrr_context {
|
|
unsigned long flags;
|
|
unsigned long cr4val;
|
|
u32 deftype_lo;
|
|
u32 deftype_hi;
|
|
u32 ccr3;
|
|
};
|
|
|
|
struct mtrr_var_range {
|
|
u32 base_lo;
|
|
u32 base_hi;
|
|
u32 mask_lo;
|
|
u32 mask_hi;
|
|
};
|
|
|
|
void set_mtrr_done(struct set_mtrr_context *ctxt);
|
|
void set_mtrr_cache_disable(struct set_mtrr_context *ctxt);
|
|
void set_mtrr_prepare_save(struct set_mtrr_context *ctxt);
|
|
|
|
void fill_mtrr_var_range(unsigned int index,
|
|
u32 base_lo, u32 base_hi, u32 mask_lo, u32 mask_hi);
|
|
void get_mtrr_state(void);
|
|
|
|
extern void set_mtrr_ops(struct mtrr_ops * ops);
|
|
|
|
extern u64 size_or_mask, size_and_mask;
|
|
extern struct mtrr_ops * mtrr_if;
|
|
|
|
#define is_cpu(vnd) (mtrr_if && mtrr_if->vendor == X86_VENDOR_##vnd)
|
|
#define use_intel() (mtrr_if && mtrr_if->use_intel_if == 1)
|
|
|
|
extern unsigned int num_var_ranges;
|
|
extern u64 mtrr_tom2;
|
|
|
|
void mtrr_state_warn(void);
|
|
const char *mtrr_attrib_to_str(int x);
|
|
void mtrr_wrmsr(unsigned, unsigned, unsigned);
|
|
|
|
/* CPU specific mtrr init functions */
|
|
int amd_init_mtrr(void);
|
|
int cyrix_init_mtrr(void);
|
|
int centaur_init_mtrr(void);
|