x86: break up mtrr_cleanup() into several small functions.
Ingo said mtrr_cleanup() is big and ugly. so break it up into more functions and make it more readable. Signed-off-by: Yinghai Lu <yinghai@kernel.org> Signed-off-by: Ingo Molnar <mingo@elte.hu>
This commit is contained in:
Yinghai Lu
Ingo Molnar
parent
49fdf6785f
commit
30604bb410
1 changed files with 174 additions and 178 deletions
|
|
@ -803,6 +803,7 @@ x86_get_mtrr_mem_range(struct res_range *range, int nr_range,
|
|||
}
|
||||
|
||||
static struct res_range __initdata range[RANGE_NUM];
|
||||
static int __initdata nr_range;
|
||||
|
||||
#ifdef CONFIG_MTRR_SANITIZER
|
||||
|
||||
|
|
@ -1206,40 +1207,44 @@ struct mtrr_cleanup_result {
|
|||
#define PSHIFT (PAGE_SHIFT - 10)
|
||||
|
||||
static struct mtrr_cleanup_result __initdata result[NUM_RESULT];
|
||||
static struct res_range __initdata range_new[RANGE_NUM];
|
||||
static unsigned long __initdata min_loss_pfn[RANGE_NUM];
|
||||
|
||||
static int __init mtrr_cleanup(unsigned address_bits)
|
||||
static void __init print_out_mtrr_range_state(void)
|
||||
{
|
||||
unsigned long extra_remove_base, extra_remove_size;
|
||||
unsigned long base, size, def, dummy;
|
||||
mtrr_type type;
|
||||
int nr_range, nr_range_new;
|
||||
u64 chunk_size, gran_size;
|
||||
unsigned long range_sums, range_sums_new;
|
||||
int index_good;
|
||||
int num_reg_good;
|
||||
int i;
|
||||
char start_factor = 'K', size_factor = 'K';
|
||||
unsigned long start_base, size_base;
|
||||
mtrr_type type;
|
||||
|
||||
for (i = 0; i < num_var_ranges; i++) {
|
||||
|
||||
size_base = range_state[i].size_pfn << (PAGE_SHIFT - 10);
|
||||
if (!size_base)
|
||||
continue;
|
||||
|
||||
size_base = to_size_factor(size_base, &size_factor),
|
||||
start_base = range_state[i].base_pfn << (PAGE_SHIFT - 10);
|
||||
start_base = to_size_factor(start_base, &start_factor),
|
||||
type = range_state[i].type;
|
||||
|
||||
printk(KERN_DEBUG "reg %d, base: %ld%cB, range: %ld%cB, type %s\n",
|
||||
i, start_base, start_factor,
|
||||
size_base, size_factor,
|
||||
(type == MTRR_TYPE_UNCACHABLE) ? "UC" :
|
||||
((type == MTRR_TYPE_WRPROT) ? "WP" :
|
||||
((type == MTRR_TYPE_WRBACK) ? "WB" : "Other"))
|
||||
);
|
||||
}
|
||||
}
|
||||
|
||||
static int __init mtrr_need_cleanup(void)
|
||||
{
|
||||
int i;
|
||||
mtrr_type type;
|
||||
unsigned long size;
|
||||
/* extra one for all 0 */
|
||||
int num[MTRR_NUM_TYPES + 1];
|
||||
|
||||
if (!is_cpu(INTEL) || enable_mtrr_cleanup < 1)
|
||||
return 0;
|
||||
rdmsr(MTRRdefType_MSR, def, dummy);
|
||||
def &= 0xff;
|
||||
if (def != MTRR_TYPE_UNCACHABLE)
|
||||
return 0;
|
||||
|
||||
/* get it and store it aside */
|
||||
memset(range_state, 0, sizeof(range_state));
|
||||
for (i = 0; i < num_var_ranges; i++) {
|
||||
mtrr_if->get(i, &base, &size, &type);
|
||||
range_state[i].base_pfn = base;
|
||||
range_state[i].size_pfn = size;
|
||||
range_state[i].type = type;
|
||||
}
|
||||
|
||||
/* check entries number */
|
||||
memset(num, 0, sizeof(num));
|
||||
for (i = 0; i < num_var_ranges; i++) {
|
||||
|
|
@ -1263,29 +1268,133 @@ static int __init mtrr_cleanup(unsigned address_bits)
|
|||
num_var_ranges - num[MTRR_NUM_TYPES])
|
||||
return 0;
|
||||
|
||||
return 1;
|
||||
}
|
||||
|
||||
static unsigned long __initdata range_sums;
|
||||
static void __init mtrr_calc_range_state(u64 chunk_size, u64 gran_size,
|
||||
unsigned long extra_remove_base,
|
||||
unsigned long extra_remove_size,
|
||||
int i)
|
||||
{
|
||||
int num_reg;
|
||||
static struct res_range range_new[RANGE_NUM];
|
||||
static int nr_range_new;
|
||||
unsigned long range_sums_new;
|
||||
|
||||
/* convert ranges to var ranges state */
|
||||
num_reg = x86_setup_var_mtrrs(range, nr_range,
|
||||
chunk_size, gran_size);
|
||||
|
||||
/* we got new setting in range_state, check it */
|
||||
memset(range_new, 0, sizeof(range_new));
|
||||
nr_range_new = x86_get_mtrr_mem_range(range_new, 0,
|
||||
extra_remove_base, extra_remove_size);
|
||||
range_sums_new = sum_ranges(range_new, nr_range_new);
|
||||
|
||||
result[i].chunk_sizek = chunk_size >> 10;
|
||||
result[i].gran_sizek = gran_size >> 10;
|
||||
result[i].num_reg = num_reg;
|
||||
if (range_sums < range_sums_new) {
|
||||
result[i].lose_cover_sizek =
|
||||
(range_sums_new - range_sums) << PSHIFT;
|
||||
result[i].bad = 1;
|
||||
} else
|
||||
result[i].lose_cover_sizek =
|
||||
(range_sums - range_sums_new) << PSHIFT;
|
||||
|
||||
/* double check it */
|
||||
if (!result[i].bad && !result[i].lose_cover_sizek) {
|
||||
if (nr_range_new != nr_range ||
|
||||
memcmp(range, range_new, sizeof(range)))
|
||||
result[i].bad = 1;
|
||||
}
|
||||
|
||||
if (!result[i].bad && (range_sums - range_sums_new <
|
||||
min_loss_pfn[num_reg])) {
|
||||
min_loss_pfn[num_reg] =
|
||||
range_sums - range_sums_new;
|
||||
}
|
||||
}
|
||||
|
||||
static void __init mtrr_print_out_one_result(int i)
|
||||
{
|
||||
char gran_factor, chunk_factor, lose_factor;
|
||||
unsigned long gran_base, chunk_base, lose_base;
|
||||
|
||||
gran_base = to_size_factor(result[i].gran_sizek, &gran_factor),
|
||||
chunk_base = to_size_factor(result[i].chunk_sizek, &chunk_factor),
|
||||
lose_base = to_size_factor(result[i].lose_cover_sizek, &lose_factor),
|
||||
printk(KERN_INFO "%sgran_size: %ld%c \tchunk_size: %ld%c \t",
|
||||
result[i].bad ? "*BAD*" : " ",
|
||||
gran_base, gran_factor, chunk_base, chunk_factor);
|
||||
printk(KERN_CONT "num_reg: %d \tlose cover RAM: %s%ld%c\n",
|
||||
result[i].num_reg, result[i].bad ? "-" : "",
|
||||
lose_base, lose_factor);
|
||||
}
|
||||
|
||||
static int __init mtrr_search_optimal_index(void)
|
||||
{
|
||||
int i;
|
||||
int num_reg_good;
|
||||
int index_good;
|
||||
|
||||
if (nr_mtrr_spare_reg >= num_var_ranges)
|
||||
nr_mtrr_spare_reg = num_var_ranges - 1;
|
||||
num_reg_good = -1;
|
||||
for (i = num_var_ranges - nr_mtrr_spare_reg; i > 0; i--) {
|
||||
if (!min_loss_pfn[i])
|
||||
num_reg_good = i;
|
||||
}
|
||||
|
||||
index_good = -1;
|
||||
if (num_reg_good != -1) {
|
||||
for (i = 0; i < NUM_RESULT; i++) {
|
||||
if (!result[i].bad &&
|
||||
result[i].num_reg == num_reg_good &&
|
||||
!result[i].lose_cover_sizek) {
|
||||
index_good = i;
|
||||
break;
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
return index_good;
|
||||
}
|
||||
|
||||
|
||||
static int __init mtrr_cleanup(unsigned address_bits)
|
||||
{
|
||||
unsigned long extra_remove_base, extra_remove_size;
|
||||
unsigned long base, size, def, dummy;
|
||||
mtrr_type type;
|
||||
u64 chunk_size, gran_size;
|
||||
int index_good;
|
||||
int i;
|
||||
|
||||
if (!is_cpu(INTEL) || enable_mtrr_cleanup < 1)
|
||||
return 0;
|
||||
rdmsr(MTRRdefType_MSR, def, dummy);
|
||||
def &= 0xff;
|
||||
if (def != MTRR_TYPE_UNCACHABLE)
|
||||
return 0;
|
||||
|
||||
/* get it and store it aside */
|
||||
memset(range_state, 0, sizeof(range_state));
|
||||
for (i = 0; i < num_var_ranges; i++) {
|
||||
mtrr_if->get(i, &base, &size, &type);
|
||||
range_state[i].base_pfn = base;
|
||||
range_state[i].size_pfn = size;
|
||||
range_state[i].type = type;
|
||||
}
|
||||
|
||||
/* check if we need handle it and can handle it */
|
||||
if (!mtrr_need_cleanup())
|
||||
return 0;
|
||||
|
||||
/* print original var MTRRs at first, for debugging: */
|
||||
printk(KERN_DEBUG "original variable MTRRs\n");
|
||||
for (i = 0; i < num_var_ranges; i++) {
|
||||
char start_factor = 'K', size_factor = 'K';
|
||||
unsigned long start_base, size_base;
|
||||
|
||||
size_base = range_state[i].size_pfn << (PAGE_SHIFT - 10);
|
||||
if (!size_base)
|
||||
continue;
|
||||
|
||||
size_base = to_size_factor(size_base, &size_factor),
|
||||
start_base = range_state[i].base_pfn << (PAGE_SHIFT - 10);
|
||||
start_base = to_size_factor(start_base, &start_factor),
|
||||
type = range_state[i].type;
|
||||
|
||||
printk(KERN_DEBUG "reg %d, base: %ld%cB, range: %ld%cB, type %s\n",
|
||||
i, start_base, start_factor,
|
||||
size_base, size_factor,
|
||||
(type == MTRR_TYPE_UNCACHABLE) ? "UC" :
|
||||
((type == MTRR_TYPE_WRPROT) ? "WP" :
|
||||
((type == MTRR_TYPE_WRBACK) ? "WB" : "Other"))
|
||||
);
|
||||
}
|
||||
print_out_mtrr_range_state();
|
||||
|
||||
memset(range, 0, sizeof(range));
|
||||
extra_remove_size = 0;
|
||||
|
|
@ -1309,176 +1418,64 @@ static int __init mtrr_cleanup(unsigned address_bits)
|
|||
range_sums >> (20 - PAGE_SHIFT));
|
||||
|
||||
if (mtrr_chunk_size && mtrr_gran_size) {
|
||||
int num_reg;
|
||||
char gran_factor, chunk_factor, lose_factor;
|
||||
unsigned long gran_base, chunk_base, lose_base;
|
||||
|
||||
debug_print++;
|
||||
/* convert ranges to var ranges state */
|
||||
num_reg = x86_setup_var_mtrrs(range, nr_range, mtrr_chunk_size,
|
||||
mtrr_gran_size);
|
||||
|
||||
/* we got new setting in range_state, check it */
|
||||
memset(range_new, 0, sizeof(range_new));
|
||||
nr_range_new = x86_get_mtrr_mem_range(range_new, 0,
|
||||
extra_remove_base,
|
||||
extra_remove_size);
|
||||
range_sums_new = sum_ranges(range_new, nr_range_new);
|
||||
|
||||
i = 0;
|
||||
result[i].chunk_sizek = mtrr_chunk_size >> 10;
|
||||
result[i].gran_sizek = mtrr_gran_size >> 10;
|
||||
result[i].num_reg = num_reg;
|
||||
if (range_sums < range_sums_new) {
|
||||
result[i].lose_cover_sizek =
|
||||
(range_sums_new - range_sums) << PSHIFT;
|
||||
result[i].bad = 1;
|
||||
} else
|
||||
result[i].lose_cover_sizek =
|
||||
(range_sums - range_sums_new) << PSHIFT;
|
||||
mtrr_calc_range_state(mtrr_chunk_size, mtrr_gran_size,
|
||||
extra_remove_base, extra_remove_size, i);
|
||||
|
||||
mtrr_print_out_one_result(i);
|
||||
|
||||
gran_base = to_size_factor(result[i].gran_sizek, &gran_factor),
|
||||
chunk_base = to_size_factor(result[i].chunk_sizek, &chunk_factor),
|
||||
lose_base = to_size_factor(result[i].lose_cover_sizek, &lose_factor),
|
||||
printk(KERN_INFO "%sgran_size: %ld%c \tchunk_size: %ld%c \t",
|
||||
result[i].bad?"*BAD*":" ",
|
||||
gran_base, gran_factor, chunk_base, chunk_factor);
|
||||
printk(KERN_CONT "num_reg: %d \tlose cover RAM: %s%ld%c\n",
|
||||
result[i].num_reg, result[i].bad?"-":"",
|
||||
lose_base, lose_factor);
|
||||
if (!result[i].bad) {
|
||||
set_var_mtrr_all(address_bits);
|
||||
return 1;
|
||||
}
|
||||
printk(KERN_INFO "invalid mtrr_gran_size or mtrr_chunk_size, "
|
||||
"will find optimal one\n");
|
||||
debug_print--;
|
||||
memset(result, 0, sizeof(result[0]));
|
||||
}
|
||||
|
||||
i = 0;
|
||||
memset(min_loss_pfn, 0xff, sizeof(min_loss_pfn));
|
||||
memset(result, 0, sizeof(result));
|
||||
for (gran_size = (1ULL<<16); gran_size < (1ULL<<32); gran_size <<= 1) {
|
||||
char gran_factor;
|
||||
unsigned long gran_base;
|
||||
|
||||
if (debug_print)
|
||||
gran_base = to_size_factor(gran_size >> 10, &gran_factor);
|
||||
|
||||
for (chunk_size = gran_size; chunk_size < (1ULL<<32);
|
||||
chunk_size <<= 1) {
|
||||
int num_reg;
|
||||
|
||||
if (debug_print) {
|
||||
char chunk_factor;
|
||||
unsigned long chunk_base;
|
||||
|
||||
chunk_base = to_size_factor(chunk_size>>10, &chunk_factor),
|
||||
printk(KERN_INFO "\n");
|
||||
printk(KERN_INFO "gran_size: %ld%c chunk_size: %ld%c \n",
|
||||
gran_base, gran_factor, chunk_base, chunk_factor);
|
||||
}
|
||||
if (i >= NUM_RESULT)
|
||||
continue;
|
||||
|
||||
/* convert ranges to var ranges state */
|
||||
num_reg = x86_setup_var_mtrrs(range, nr_range,
|
||||
chunk_size, gran_size);
|
||||
|
||||
/* we got new setting in range_state, check it */
|
||||
memset(range_new, 0, sizeof(range_new));
|
||||
nr_range_new = x86_get_mtrr_mem_range(range_new, 0,
|
||||
extra_remove_base, extra_remove_size);
|
||||
range_sums_new = sum_ranges(range_new, nr_range_new);
|
||||
|
||||
result[i].chunk_sizek = chunk_size >> 10;
|
||||
result[i].gran_sizek = gran_size >> 10;
|
||||
result[i].num_reg = num_reg;
|
||||
if (range_sums < range_sums_new) {
|
||||
result[i].lose_cover_sizek =
|
||||
(range_sums_new - range_sums) << PSHIFT;
|
||||
result[i].bad = 1;
|
||||
} else
|
||||
result[i].lose_cover_sizek =
|
||||
(range_sums - range_sums_new) << PSHIFT;
|
||||
|
||||
/* double check it */
|
||||
if (!result[i].bad && !result[i].lose_cover_sizek) {
|
||||
if (nr_range_new != nr_range ||
|
||||
memcmp(range, range_new, sizeof(range)))
|
||||
result[i].bad = 1;
|
||||
mtrr_calc_range_state(chunk_size, gran_size,
|
||||
extra_remove_base, extra_remove_size, i);
|
||||
if (debug_print) {
|
||||
mtrr_print_out_one_result(i);
|
||||
printk(KERN_INFO "\n");
|
||||
}
|
||||
|
||||
if (!result[i].bad && (range_sums - range_sums_new <
|
||||
min_loss_pfn[num_reg])) {
|
||||
min_loss_pfn[num_reg] =
|
||||
range_sums - range_sums_new;
|
||||
}
|
||||
i++;
|
||||
}
|
||||
}
|
||||
|
||||
/* print out all */
|
||||
for (i = 0; i < NUM_RESULT; i++) {
|
||||
char gran_factor, chunk_factor, lose_factor;
|
||||
unsigned long gran_base, chunk_base, lose_base;
|
||||
|
||||
gran_base = to_size_factor(result[i].gran_sizek, &gran_factor),
|
||||
chunk_base = to_size_factor(result[i].chunk_sizek, &chunk_factor),
|
||||
lose_base = to_size_factor(result[i].lose_cover_sizek, &lose_factor),
|
||||
printk(KERN_INFO "%sgran_size: %ld%c \tchunk_size: %ld%c \t",
|
||||
result[i].bad?"*BAD*":" ",
|
||||
gran_base, gran_factor, chunk_base, chunk_factor);
|
||||
printk(KERN_CONT "num_reg: %d \tlose cover RAM: %s%ld%c\n",
|
||||
result[i].num_reg, result[i].bad?"-":"",
|
||||
lose_base, lose_factor);
|
||||
}
|
||||
|
||||
/* try to find the optimal index */
|
||||
if (nr_mtrr_spare_reg >= num_var_ranges)
|
||||
nr_mtrr_spare_reg = num_var_ranges - 1;
|
||||
num_reg_good = -1;
|
||||
for (i = num_var_ranges - nr_mtrr_spare_reg; i > 0; i--) {
|
||||
if (!min_loss_pfn[i])
|
||||
num_reg_good = i;
|
||||
}
|
||||
|
||||
index_good = -1;
|
||||
if (num_reg_good != -1) {
|
||||
for (i = 0; i < NUM_RESULT; i++) {
|
||||
if (!result[i].bad &&
|
||||
result[i].num_reg == num_reg_good &&
|
||||
!result[i].lose_cover_sizek) {
|
||||
index_good = i;
|
||||
break;
|
||||
}
|
||||
}
|
||||
}
|
||||
index_good = mtrr_search_optimal_index();
|
||||
|
||||
if (index_good != -1) {
|
||||
char gran_factor, chunk_factor, lose_factor;
|
||||
unsigned long gran_base, chunk_base, lose_base;
|
||||
|
||||
printk(KERN_INFO "Found optimal setting for mtrr clean up\n");
|
||||
i = index_good;
|
||||
gran_base = to_size_factor(result[i].gran_sizek, &gran_factor),
|
||||
chunk_base = to_size_factor(result[i].chunk_sizek, &chunk_factor),
|
||||
lose_base = to_size_factor(result[i].lose_cover_sizek, &lose_factor),
|
||||
printk(KERN_INFO "gran_size: %ld%c \tchunk_size: %ld%c \t",
|
||||
gran_base, gran_factor, chunk_base, chunk_factor);
|
||||
printk(KERN_CONT "num_reg: %d \tlose RAM: %ld%c\n",
|
||||
result[i].num_reg, lose_base, lose_factor);
|
||||
mtrr_print_out_one_result(i);
|
||||
|
||||
/* convert ranges to var ranges state */
|
||||
chunk_size = result[i].chunk_sizek;
|
||||
chunk_size <<= 10;
|
||||
gran_size = result[i].gran_sizek;
|
||||
gran_size <<= 10;
|
||||
debug_print++;
|
||||
x86_setup_var_mtrrs(range, nr_range, chunk_size, gran_size);
|
||||
debug_print--;
|
||||
set_var_mtrr_all(address_bits);
|
||||
printk(KERN_DEBUG "New variable MTRRs\n");
|
||||
print_out_mtrr_range_state();
|
||||
return 1;
|
||||
} else {
|
||||
/* print out all */
|
||||
for (i = 0; i < NUM_RESULT; i++)
|
||||
mtrr_print_out_one_result(i);
|
||||
}
|
||||
|
||||
printk(KERN_INFO "mtrr_cleanup: can not find optimal value\n");
|
||||
|
|
@ -1562,7 +1559,6 @@ int __init mtrr_trim_uncached_memory(unsigned long end_pfn)
|
|||
{
|
||||
unsigned long i, base, size, highest_pfn = 0, def, dummy;
|
||||
mtrr_type type;
|
||||
int nr_range;
|
||||
u64 total_trim_size;
|
||||
|
||||
/* extra one for all 0 */
|
||||
|
|
|
|||
Loading…
Reference in a new issue