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Commit f5098d62 authored by Yinghai Lu's avatar Yinghai Lu Committed by Thomas Gleixner
Browse files

x86: mtrr cleanup for converting continuous to discrete layout v8 - fix 



v9: address format change requests by Ingo
    more case handling in range_to_var_with_hole

Signed-off-by: default avatarYinghai Lu <yhlu.kernel@gmail.com>
Signed-off-by: default avatarIngo Molnar <mingo@elte.hu>
Signed-off-by: default avatarThomas Gleixner <tglx@linutronix.de>
parent 8a374026

arch/x86/Kconfig

+4 −5
Original line number Diff line number Diff line
@@ -1110,13 +1110,12 @@ config MTRR_SANITIZER 
	  If unsure, say Y.



config MTRR_SANITIZER_ENABLE_DEFAULT

	def_bool y

	prompt "Enable MTRR cleanup by default"

	int "MTRR cleanup enable value (0-1)"

	range 0 1

	default "0"

	depends on MTRR_SANITIZER

	help

	  Enable mtrr cleanup by default



	  If unsure, say Y.

	  Enable mtrr cleanup default value



config X86_PAT

	bool

arch/x86/kernel/cpu/mtrr/main.c

+90 −74
Original line number Diff line number Diff line
@@ -611,17 +611,9 @@ static struct sysdev_driver mtrr_sysdev_driver = { 
};



#ifdef CONFIG_MTRR_SANITIZER



#ifdef CONFIG_MTRR_SANITIZER_ENABLE_DEFAULT

static int enable_mtrr_cleanup __initdata = 1;

#else

static int enable_mtrr_cleanup __initdata;

#endif



static int enable_mtrr_cleanup __initdata = CONFIG_MTRR_SANITIZER_ENABLE_DEFAULT;

#else



static int enable_mtrr_cleanup __initdata = -1;



#endif



static int __init disable_mtrr_cleanup_setup(char *str)
@@ -640,6 +632,7 @@ static int __init enable_mtrr_cleanup_setup(char *str) 
}

early_param("enble_mtrr_cleanup", enable_mtrr_cleanup_setup);



/* should be related to MTRR_VAR_RANGES nums */

#define RANGE_NUM 256



struct res_range {
@@ -647,13 +640,27 @@ struct res_range { 
	unsigned long end;

};



static int __init add_range(struct res_range *range, int nr_range, unsigned long start,

			      unsigned long end, int merge)

static int __init

add_range(struct res_range *range, int nr_range, unsigned long start,

			      unsigned long end)

{

	int i;

	/* out of slots */

	if (nr_range >= RANGE_NUM)

		return nr_range;



	if (!merge)

		goto addit;

	range[nr_range].start = start;

	range[nr_range].end = end;



	nr_range++;



	return nr_range;

}



static int __init

add_range_with_merge(struct res_range *range, int nr_range, unsigned long start,

			      unsigned long end)

{

	int i;



	/* try to merge it with old one */

	for (i = 0; i < nr_range; i++) {
@@ -676,24 +683,14 @@ static int __init add_range(struct res_range *range, int nr_range, unsigned long 
		return nr_range;

	}



addit:

	/* need to add that */

	if (nr_range >= RANGE_NUM)

		return nr_range;



	range[nr_range].start = start;

	range[nr_range].end = end;



	nr_range++;



	return nr_range;



	return add_range(range, nr_range, start, end);

}

static void __init subtract_range(struct res_range *range, unsigned long start,

				unsigned long end)



static void __init

subtract_range(struct res_range *range, unsigned long start, unsigned long end)

{

	int i;

	int j;

	int i, j;



	for (j = 0; j < RANGE_NUM; j++) {

		if (!range[j].end)
@@ -747,46 +744,47 @@ static int __init cmp_range(const void *x1, const void *x2) 
}



struct var_mtrr_state {

	unsigned long range_startk, range_sizek;

	unsigned long	range_startk;

	unsigned long	range_sizek;

	unsigned long	chunk_sizek;

	unsigned long	gran_sizek;

	unsigned int	reg;

	unsigned address_bits;

	unsigned int	address_bits;

};



static void __init set_var_mtrr(

	unsigned int reg, unsigned long basek, unsigned long sizek,

static void __init

set_var_mtrr(unsigned int reg, unsigned long basek, unsigned long sizek,

		unsigned char type, unsigned address_bits)

{

	u32 base_lo, base_hi, mask_lo, mask_hi;

	unsigned address_mask_high;

	u64 base, mask;



	if (!sizek) {

		fill_mtrr_var_range(reg, 0, 0, 0, 0);

		return;

	}



	address_mask_high = ((1u << (address_bits - 32u)) - 1u);

	mask = (1ULL << address_bits) - 1;

	mask &= ~((((u64)sizek) << 10) - 1);



	base_hi = basek >> 22;

	base_lo  = basek << 10;

	base  = ((u64)basek) << 10;



	if (sizek < 4*1024*1024) {

		mask_hi = address_mask_high;

		mask_lo = ~((sizek << 10) - 1);

	} else {

		mask_hi = address_mask_high & (~((sizek >> 22) - 1));

		mask_lo = 0;

	}

	base |= type;

	mask |= 0x800;



	base_lo = base & ((1ULL<<32) - 1);

	base_hi = base >> 32;



	mask_lo = mask & ((1ULL<<32) - 1);

	mask_hi = mask >> 32;



	base_lo |= type;

	mask_lo |= 0x800;

	fill_mtrr_var_range(reg, base_lo, base_hi, mask_lo, mask_hi);

}



static unsigned int __init range_to_mtrr(unsigned int reg,

	unsigned long range_startk, unsigned long range_sizek,

	unsigned char type, unsigned address_bits)

static unsigned int __init

range_to_mtrr(unsigned int reg, unsigned long range_startk,

	      unsigned long range_sizek, unsigned char type,

	      unsigned address_bits)

{

	if (!range_sizek || (reg >= num_var_ranges))

		return reg;
@@ -794,6 +792,7 @@ static unsigned int __init range_to_mtrr(unsigned int reg, 
	while (range_sizek) {

		unsigned long max_align, align;

		unsigned long sizek;



		/* Compute the maximum size I can make a range */

		if (range_startk)

			max_align = ffs(range_startk) - 1;
@@ -818,7 +817,8 @@ static unsigned int __init range_to_mtrr(unsigned int reg, 
	return reg;

}



static void __init range_to_mtrr_with_hole(struct var_mtrr_state *state, unsigned long basek)

static void __init

range_to_mtrr_with_hole(struct var_mtrr_state *state, unsigned long basek)

{

	unsigned long hole_basek, hole_sizek;

	unsigned long range0_basek, range0_sizek;
@@ -848,15 +848,21 @@ static void __init range_to_mtrr_with_hole(struct var_mtrr_state *state, unsigne 
	/* try to append some small hole */

	range0_basek = state->range_startk;

	range0_sizek = ALIGN(state->range_sizek, chunk_sizek);

	if ((range0_sizek == state->range_sizek) ||

	    ((range0_basek + range0_sizek - chunk_sizek > basek) && basek)) {

	if (range0_sizek == state->range_sizek) {

			printk(KERN_INFO "rangeX: %016lx - %016lx\n", range0_basek<<10, (range0_basek + state->range_sizek)<<10);

			state->reg = range_to_mtrr(state->reg, range0_basek,

				state->range_sizek, MTRR_TYPE_WRBACK, state->address_bits);

		return;

	} else if (basek) {

	    while (range0_basek + range0_sizek - chunk_sizek > basek) {

		range0_sizek -= chunk_sizek;

		if (!range0_sizek)

			break;

	    }

	}





	if (range0_sizek > chunk_sizek)

		range0_sizek -= chunk_sizek;

	printk(KERN_INFO "range0: %016lx - %016lx\n", range0_basek<<10, (range0_basek + range0_sizek)<<10);

	state->reg = range_to_mtrr(state->reg, range0_basek,
@@ -864,7 +870,9 @@ static void __init range_to_mtrr_with_hole(struct var_mtrr_state *state, unsigne 


	range_basek = range0_basek + range0_sizek;

	range_sizek = chunk_sizek;

	if (range_sizek - (state->range_sizek - range0_sizek) < (chunk_sizek >> 1)) {



	if ((range_sizek - (state->range_sizek - range0_sizek) < (chunk_sizek >> 1)) &&

	    (range_basek + range_sizek <= basek)) {

		hole_sizek = range_sizek - (state->range_sizek - range0_sizek);

		hole_basek = range_basek + range_sizek - hole_sizek;

	} else
@@ -880,7 +888,9 @@ static void __init range_to_mtrr_with_hole(struct var_mtrr_state *state, unsigne 
	}

}



static void __init set_var_mtrr_range(struct var_mtrr_state *state, unsigned long base_pfn, unsigned long size_pfn)

static void __init

set_var_mtrr_range(struct var_mtrr_state *state, unsigned long base_pfn,

		   unsigned long size_pfn)

{

	unsigned long basek, sizek;
@@ -921,7 +931,7 @@ static int __init parse_mtrr_chunk_size_opt(char *p) 
early_param("mtrr_chunk_size", parse_mtrr_chunk_size_opt);



/* granity of mtrr of block */

static u64 mtrr_gran_size __initdata = (64ULL<<20);

static u64 mtrr_gran_size __initdata = (1ULL<<20);



static int __init parse_mtrr_gran_size_opt(char *p)

{
@@ -932,7 +942,9 @@ static int __init parse_mtrr_gran_size_opt(char *p) 
}

early_param("mtrr_gran_size", parse_mtrr_gran_size_opt);



static void __init x86_setup_var_mtrrs(struct res_range *range, int nr_range, unsigned address_bits)

static void __init

x86_setup_var_mtrrs(struct res_range *range, int nr_range,

		    unsigned address_bits)

{

	struct var_mtrr_state var_state;

	int i;
@@ -952,11 +964,16 @@ static void __init x86_setup_var_mtrrs(struct res_range *range, int nr_range, un 
	range_to_mtrr_with_hole(&var_state, 0);

	printk(KERN_INFO "DONE variable MTRRs\n");

	/* Clear out the extra MTRR's */

	while (var_state.reg < num_var_ranges)

		set_var_mtrr(var_state.reg++, 0, 0, 0, var_state.address_bits);

	while (var_state.reg < num_var_ranges) {

		set_var_mtrr(var_state.reg, 0, 0, 0, var_state.address_bits);

		var_state.reg++;

	}

}



static int __init x86_get_mtrr_mem_range(struct res_range *range, int nr_range, unsigned long extra_remove_base, unsigned long extra_remove_size)

static int __init

x86_get_mtrr_mem_range(struct res_range *range, int nr_range,

		       unsigned long extra_remove_base,

		       unsigned long extra_remove_size)

{

	unsigned long i, base, size;

	mtrr_type type;
@@ -965,7 +982,7 @@ static int __init x86_get_mtrr_mem_range(struct res_range *range, int nr_range, 
		mtrr_if->get(i, &base, &size, &type);

		if (type != MTRR_TYPE_WRBACK)

			continue;

		nr_range = add_range(range, nr_range, base, base + size - 1, 1);

		nr_range = add_range_with_merge(range, nr_range, base, base + size - 1);

	}

	printk(KERN_INFO "After WB checking\n");

	for (i = 0; i < nr_range; i++)
@@ -1005,11 +1022,11 @@ static int __init x86_get_mtrr_mem_range(struct res_range *range, int nr_range, 


static int __init mtrr_cleanup(unsigned address_bits)

{

	unsigned long extra_remove_base, extra_remove_size;

	unsigned long i, base, size, def, dummy;

	mtrr_type type;

	struct res_range range[RANGE_NUM];

	mtrr_type type;

	int nr_range;

	unsigned long extra_remove_base, extra_remove_size;



	/* extra one for all 0 */

	int num[MTRR_NUM_TYPES + 1];
@@ -1053,7 +1070,6 @@ static int __init mtrr_cleanup(unsigned address_bits) 
	x86_setup_var_mtrrs(range, nr_range, address_bits);



	return 1;



}



static int disable_mtrr_trim;