mirror of https://gitee.com/openkylin/linux.git
x86: mtrr cleanup for converting continuous to discrete - auto detect v4
Loop through mtrr chunk_size and gran_size from 1M to 2G to find out
the optimal value so user does not need to add mtrr_chunk_size and
mtrr_gran_size to the kernel command line.
If optimal value is not found, print out all list to help select less
optimal value.
Add mtrr_spare_reg_nr= so user could set 2 instead of 1, if the card
need more entries.
v2: find the one with more spare entries
v3: fix hole_basek offset
v4: tight the compare between range and range_new
loop stop with 4g
Signed-off-by: Yinghai Lu <yhlu.kernel@gmail.com>
Cc: Andrew Morton <akpm@linux-foundation.org>
Cc: Gabriel C <nix.or.die@googlemail.com>
Cc: Mika Fischer <mika.fischer@zoopnet.de>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
This commit is contained in:
Yinghai Lu
Thomas Gleixner
parent
f5098d62c1
commit
12031a624a
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@ -610,8 +610,17 @@ and is between 256 and 4096 characters. It is defined in the file
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that could hold holes aka. UC entries.
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mtrr_gran_size=nn[KMG] [X86]
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used for mtrr cleanup. It is granity of mtrr block.
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Big value could prevent small alignment use up MTRRs.
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Used for mtrr cleanup. It is granularity of mtrr block.
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Default is 1.
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Large value could prevent small alignment from
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using up MTRRs.
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mtrr_spare_reg_nr=n [X86]
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Format: <integer>
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Range: 0,7 : spare reg number
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Default : 1
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Used for mtrr cleanup. It is spare mtrr entries number.
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Set to 2 or more if your graphical card needs more.
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disable_mtrr_trim [X86, Intel and AMD only]
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By default the kernel will trim any uncacheable
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@ -1117,6 +1117,15 @@ config MTRR_SANITIZER_ENABLE_DEFAULT
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help
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Enable mtrr cleanup default value
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config MTRR_SANITIZER_SPARE_REG_NR_DEFAULT
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int "MTRR cleanup spare reg num (0-7)"
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range 0 7
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default "1"
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depends on MTRR_SANITIZER
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help
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mtrr cleanup spare entries default, it can be changed via
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mtrr_spare_reg_nr=
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config X86_PAT
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bool
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prompt "x86 PAT support"
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@ -610,28 +610,6 @@ static struct sysdev_driver mtrr_sysdev_driver = {
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.resume = mtrr_restore,
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};
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#ifdef CONFIG_MTRR_SANITIZER
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static int enable_mtrr_cleanup __initdata = CONFIG_MTRR_SANITIZER_ENABLE_DEFAULT;
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#else
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static int enable_mtrr_cleanup __initdata = -1;
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#endif
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static int __init disable_mtrr_cleanup_setup(char *str)
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{
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if (enable_mtrr_cleanup != -1)
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enable_mtrr_cleanup = 0;
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return 0;
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}
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early_param("disable_mtrr_cleanup", disable_mtrr_cleanup_setup);
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static int __init enable_mtrr_cleanup_setup(char *str)
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{
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if (enable_mtrr_cleanup != -1)
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enable_mtrr_cleanup = 1;
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return 0;
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}
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early_param("enble_mtrr_cleanup", enable_mtrr_cleanup_setup);
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/* should be related to MTRR_VAR_RANGES nums */
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#define RANGE_NUM 256
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@ -702,13 +680,15 @@ subtract_range(struct res_range *range, unsigned long start, unsigned long end)
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continue;
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}
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if (start <= range[j].start && end < range[j].end && range[j].start < end + 1) {
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if (start <= range[j].start && end < range[j].end &&
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range[j].start < end + 1) {
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range[j].start = end + 1;
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continue;
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}
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if (start > range[j].start && end >= range[j].end && range[j].end > start - 1) {
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if (start > range[j].start && end >= range[j].end &&
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range[j].end > start - 1) {
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range[j].end = start - 1;
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continue;
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}
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@ -743,18 +723,123 @@ static int __init cmp_range(const void *x1, const void *x2)
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return start1 - start2;
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}
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struct var_mtrr_range_state {
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unsigned long base_pfn;
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unsigned long size_pfn;
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mtrr_type type;
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};
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struct var_mtrr_range_state __initdata range_state[RANGE_NUM];
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static int __init
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x86_get_mtrr_mem_range(struct res_range *range, int nr_range,
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unsigned long extra_remove_base,
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unsigned long extra_remove_size)
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{
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unsigned long i, base, size;
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mtrr_type type;
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for (i = 0; i < num_var_ranges; i++) {
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type = range_state[i].type;
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if (type != MTRR_TYPE_WRBACK)
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continue;
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base = range_state[i].base_pfn;
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size = range_state[i].size_pfn;
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nr_range = add_range_with_merge(range, nr_range, base,
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base + size - 1);
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}
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printk(KERN_DEBUG "After WB checking\n");
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for (i = 0; i < nr_range; i++)
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printk(KERN_DEBUG "MTRR MAP PFN: %016lx - %016lx\n",
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range[i].start, range[i].end + 1);
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/* take out UC ranges */
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for (i = 0; i < num_var_ranges; i++) {
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type = range_state[i].type;
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if (type != MTRR_TYPE_UNCACHABLE)
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continue;
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size = range_state[i].size_pfn;
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if (!size)
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continue;
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base = range_state[i].base_pfn;
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subtract_range(range, base, base + size - 1);
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}
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if (extra_remove_size)
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subtract_range(range, extra_remove_base,
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extra_remove_base + extra_remove_size - 1);
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/* get new range num */
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nr_range = 0;
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for (i = 0; i < RANGE_NUM; i++) {
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if (!range[i].end)
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continue;
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nr_range++;
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}
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printk(KERN_DEBUG "After UC checking\n");
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for (i = 0; i < nr_range; i++)
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printk(KERN_DEBUG "MTRR MAP PFN: %016lx - %016lx\n",
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range[i].start, range[i].end + 1);
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/* sort the ranges */
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sort(range, nr_range, sizeof(struct res_range), cmp_range, NULL);
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printk(KERN_DEBUG "After sorting\n");
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for (i = 0; i < nr_range; i++)
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printk(KERN_DEBUG "MTRR MAP PFN: %016lx - %016lx\n",
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range[i].start, range[i].end + 1);
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/* clear those is not used */
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for (i = nr_range; i < RANGE_NUM; i++)
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memset(&range[i], 0, sizeof(range[i]));
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return nr_range;
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}
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static struct res_range __initdata range[RANGE_NUM];
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#ifdef CONFIG_MTRR_SANITIZER
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static unsigned long __init sum_ranges(struct res_range *range, int nr_range)
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{
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unsigned long sum;
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int i;
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sum = 0;
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for (i = 0; i < nr_range; i++)
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sum += range[i].end + 1 - range[i].start;
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return sum;
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}
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static int enable_mtrr_cleanup __initdata =
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CONFIG_MTRR_SANITIZER_ENABLE_DEFAULT;
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static int __init disable_mtrr_cleanup_setup(char *str)
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{
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if (enable_mtrr_cleanup != -1)
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enable_mtrr_cleanup = 0;
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return 0;
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}
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early_param("disable_mtrr_cleanup", disable_mtrr_cleanup_setup);
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static int __init enable_mtrr_cleanup_setup(char *str)
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{
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if (enable_mtrr_cleanup != -1)
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enable_mtrr_cleanup = 1;
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return 0;
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}
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early_param("enble_mtrr_cleanup", enable_mtrr_cleanup_setup);
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struct var_mtrr_state {
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unsigned long range_startk;
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unsigned long range_sizek;
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unsigned long chunk_sizek;
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unsigned long gran_sizek;
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unsigned int reg;
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unsigned int address_bits;
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};
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static void __init
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set_var_mtrr(unsigned int reg, unsigned long basek, unsigned long sizek,
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unsigned char type, unsigned address_bits)
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unsigned char type, unsigned int address_bits)
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{
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u32 base_lo, base_hi, mask_lo, mask_hi;
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u64 base, mask;
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@ -781,10 +866,34 @@ set_var_mtrr(unsigned int reg, unsigned long basek, unsigned long sizek,
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fill_mtrr_var_range(reg, base_lo, base_hi, mask_lo, mask_hi);
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}
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static void __init
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save_var_mtrr(unsigned int reg, unsigned long basek, unsigned long sizek,
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unsigned char type)
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{
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range_state[reg].base_pfn = basek >> (PAGE_SHIFT - 10);
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range_state[reg].size_pfn = sizek >> (PAGE_SHIFT - 10);
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range_state[reg].type = type;
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}
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static void __init
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set_var_mtrr_all(unsigned int address_bits)
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{
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unsigned long basek, sizek;
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unsigned char type;
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unsigned int reg;
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for (reg = 0; reg < num_var_ranges; reg++) {
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basek = range_state[reg].base_pfn << (PAGE_SHIFT - 10);
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sizek = range_state[reg].size_pfn << (PAGE_SHIFT - 10);
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type = range_state[reg].type;
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set_var_mtrr(reg, basek, sizek, type, address_bits);
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}
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}
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static unsigned int __init
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range_to_mtrr(unsigned int reg, unsigned long range_startk,
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unsigned long range_sizek, unsigned char type,
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unsigned address_bits)
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unsigned long range_sizek, unsigned char type)
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{
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if (!range_sizek || (reg >= num_var_ranges))
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return reg;
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@ -803,12 +912,13 @@ range_to_mtrr(unsigned int reg, unsigned long range_startk,
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align = max_align;
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sizek = 1 << align;
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printk(KERN_INFO "Setting variable MTRR %d, base: %ldMB, range: %ldMB, type %s\n",
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printk(KERN_DEBUG "Setting variable MTRR %d, base: %ldMB, "
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"range: %ldMB, type %s\n",
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reg, range_startk >> 10, sizek >> 10,
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(type == MTRR_TYPE_UNCACHABLE)?"UC":
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((type == MTRR_TYPE_WRBACK)?"WB":"Other")
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);
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set_var_mtrr(reg++, range_startk, sizek, type, address_bits);
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save_var_mtrr(reg++, range_startk, sizek, type);
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range_startk += sizek;
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range_sizek -= sizek;
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if (reg >= num_var_ranges)
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@ -817,10 +927,12 @@ range_to_mtrr(unsigned int reg, unsigned long range_startk,
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return reg;
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}
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static void __init
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range_to_mtrr_with_hole(struct var_mtrr_state *state, unsigned long basek)
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static unsigned __init
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range_to_mtrr_with_hole(struct var_mtrr_state *state, unsigned long basek,
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unsigned long sizek)
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{
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unsigned long hole_basek, hole_sizek;
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unsigned long second_basek, second_sizek;
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unsigned long range0_basek, range0_sizek;
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unsigned long range_basek, range_sizek;
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unsigned long chunk_sizek;
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@ -828,64 +940,95 @@ range_to_mtrr_with_hole(struct var_mtrr_state *state, unsigned long basek)
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hole_basek = 0;
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hole_sizek = 0;
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second_basek = 0;
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second_sizek = 0;
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chunk_sizek = state->chunk_sizek;
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gran_sizek = state->gran_sizek;
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/* align with gran size, prevent small block used up MTRRs */
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range_basek = ALIGN(state->range_startk, gran_sizek);
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if ((range_basek > basek) && basek)
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return;
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range_sizek = ALIGN(state->range_sizek - (range_basek - state->range_startk), gran_sizek);
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return second_sizek;
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state->range_sizek -= (range_basek - state->range_startk);
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range_sizek = ALIGN(state->range_sizek, gran_sizek);
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while (range_basek + range_sizek > (state->range_startk + state->range_sizek)) {
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while (range_sizek > state->range_sizek) {
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range_sizek -= gran_sizek;
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if (!range_sizek)
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return;
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return 0;
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}
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state->range_startk = range_basek;
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state->range_sizek = range_sizek;
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/* try to append some small hole */
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range0_basek = state->range_startk;
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range0_sizek = ALIGN(state->range_sizek, chunk_sizek);
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if (range0_sizek == state->range_sizek) {
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printk(KERN_INFO "rangeX: %016lx - %016lx\n", range0_basek<<10, (range0_basek + state->range_sizek)<<10);
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state->reg = range_to_mtrr(state->reg, range0_basek,
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state->range_sizek, MTRR_TYPE_WRBACK, state->address_bits);
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return;
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} else if (basek) {
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while (range0_basek + range0_sizek - chunk_sizek > basek) {
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printk(KERN_DEBUG "rangeX: %016lx - %016lx\n", range0_basek<<10,
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(range0_basek + state->range_sizek)<<10);
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state->reg = range_to_mtrr(state->reg, range0_basek,
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state->range_sizek, MTRR_TYPE_WRBACK);
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return 0;
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}
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range0_sizek -= chunk_sizek;
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if (range0_sizek && sizek) {
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while (range0_basek + range0_sizek > (basek + sizek)) {
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range0_sizek -= chunk_sizek;
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if (!range0_sizek)
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break;
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}
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}
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if (range0_sizek) {
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printk(KERN_DEBUG "range0: %016lx - %016lx\n", range0_basek<<10,
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(range0_basek + range0_sizek)<<10);
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state->reg = range_to_mtrr(state->reg, range0_basek,
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range0_sizek, MTRR_TYPE_WRBACK);
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if (range0_sizek > chunk_sizek)
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range0_sizek -= chunk_sizek;
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printk(KERN_INFO "range0: %016lx - %016lx\n", range0_basek<<10, (range0_basek + range0_sizek)<<10);
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state->reg = range_to_mtrr(state->reg, range0_basek,
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range0_sizek, MTRR_TYPE_WRBACK, state->address_bits);
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}
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range_basek = range0_basek + range0_sizek;
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range_sizek = chunk_sizek;
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if ((range_sizek - (state->range_sizek - range0_sizek) < (chunk_sizek >> 1)) &&
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(range_basek + range_sizek <= basek)) {
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hole_sizek = range_sizek - (state->range_sizek - range0_sizek);
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hole_basek = range_basek + range_sizek - hole_sizek;
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} else
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range_sizek = state->range_sizek - range0_sizek;
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printk(KERN_INFO "range: %016lx - %016lx\n", range_basek<<10, (range_basek + range_sizek)<<10);
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state->reg = range_to_mtrr(state->reg, range_basek,
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range_sizek, MTRR_TYPE_WRBACK, state->address_bits);
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if (hole_sizek) {
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printk(KERN_INFO "hole: %016lx - %016lx\n", hole_basek<<10, (hole_basek + hole_sizek)<<10);
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state->reg = range_to_mtrr(state->reg, hole_basek,
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hole_sizek, MTRR_TYPE_UNCACHABLE, state->address_bits);
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if (range_basek + range_sizek > basek &&
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range_basek + range_sizek <= (basek + sizek)) {
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/* one hole */
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second_basek = basek;
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second_sizek = range_basek + range_sizek - basek;
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}
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/* if last piece, only could one hole near end */
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if ((second_basek || !basek) &&
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range_sizek - (state->range_sizek - range0_sizek) - second_sizek <
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(chunk_sizek >> 1)) {
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/*
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* one hole in middle (second_sizek is 0) or at end
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* (second_sizek is 0 )
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*/
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hole_sizek = range_sizek - (state->range_sizek - range0_sizek)
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- second_sizek;
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hole_basek = range_basek + range_sizek - hole_sizek
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- second_sizek;
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} else {
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/* fallback for big hole, or several holes */
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range_sizek = state->range_sizek - range0_sizek;
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second_basek = 0;
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second_sizek = 0;
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}
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printk(KERN_DEBUG "range: %016lx - %016lx\n", range_basek<<10,
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(range_basek + range_sizek)<<10);
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state->reg = range_to_mtrr(state->reg, range_basek, range_sizek,
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MTRR_TYPE_WRBACK);
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if (hole_sizek) {
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printk(KERN_DEBUG "hole: %016lx - %016lx\n", hole_basek<<10,
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(hole_basek + hole_sizek)<<10);
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state->reg = range_to_mtrr(state->reg, hole_basek, hole_sizek,
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MTRR_TYPE_UNCACHABLE);
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}
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return second_sizek;
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}
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static void __init
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@ -893,6 +1036,7 @@ set_var_mtrr_range(struct var_mtrr_state *state, unsigned long base_pfn,
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unsigned long size_pfn)
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{
|
||||
unsigned long basek, sizek;
|
||||
unsigned long second_sizek = 0;
|
||||
|
||||
if (state->reg >= num_var_ranges)
|
||||
return;
|
||||
|
|
@ -901,21 +1045,19 @@ set_var_mtrr_range(struct var_mtrr_state *state, unsigned long base_pfn,
|
|||
sizek = size_pfn << (PAGE_SHIFT - 10);
|
||||
|
||||
/* See if I can merge with the last range */
|
||||
if ((basek <= 1024) || (state->range_startk + state->range_sizek == basek)) {
|
||||
if ((basek <= 1024) ||
|
||||
(state->range_startk + state->range_sizek == basek)) {
|
||||
unsigned long endk = basek + sizek;
|
||||
state->range_sizek = endk - state->range_startk;
|
||||
return;
|
||||
}
|
||||
/* Write the range mtrrs */
|
||||
if (state->range_sizek != 0) {
|
||||
range_to_mtrr_with_hole(state, basek);
|
||||
if (state->range_sizek != 0)
|
||||
second_sizek = range_to_mtrr_with_hole(state, basek, sizek);
|
||||
|
||||
state->range_startk = 0;
|
||||
state->range_sizek = 0;
|
||||
}
|
||||
/* Allocate an msr */
|
||||
state->range_startk = basek;
|
||||
state->range_sizek = sizek;
|
||||
state->range_startk = basek + second_sizek;
|
||||
state->range_sizek = sizek - second_sizek;
|
||||
}
|
||||
|
||||
/* mininum size of mtrr block that can take hole */
|
||||
|
|
@ -931,7 +1073,7 @@ 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 = (1ULL<<20);
|
||||
static u64 mtrr_gran_size __initdata;
|
||||
|
||||
static int __init parse_mtrr_gran_size_opt(char *p)
|
||||
{
|
||||
|
|
@ -942,91 +1084,84 @@ static int __init parse_mtrr_gran_size_opt(char *p)
|
|||
}
|
||||
early_param("mtrr_gran_size", parse_mtrr_gran_size_opt);
|
||||
|
||||
static void __init
|
||||
static int nr_mtrr_spare_reg __initdata =
|
||||
CONFIG_MTRR_SANITIZER_SPARE_REG_NR_DEFAULT;
|
||||
|
||||
static int __init parse_mtrr_spare_reg(char *arg)
|
||||
{
|
||||
if (arg)
|
||||
nr_mtrr_spare_reg = simple_strtoul(arg, NULL, 0);
|
||||
return 0;
|
||||
}
|
||||
|
||||
early_param("mtrr_spare_reg_nr", parse_mtrr_spare_reg);
|
||||
|
||||
static int __init
|
||||
x86_setup_var_mtrrs(struct res_range *range, int nr_range,
|
||||
unsigned address_bits)
|
||||
u64 chunk_size, u64 gran_size)
|
||||
{
|
||||
struct var_mtrr_state var_state;
|
||||
int i;
|
||||
int num_reg;
|
||||
|
||||
var_state.range_startk = 0;
|
||||
var_state.range_sizek = 0;
|
||||
var_state.reg = 0;
|
||||
var_state.address_bits = address_bits;
|
||||
var_state.chunk_sizek = mtrr_chunk_size >> 10;
|
||||
var_state.gran_sizek = mtrr_gran_size >> 10;
|
||||
var_state.chunk_sizek = chunk_size >> 10;
|
||||
var_state.gran_sizek = gran_size >> 10;
|
||||
|
||||
memset(range_state, 0, sizeof(range_state));
|
||||
|
||||
/* Write the range etc */
|
||||
for (i = 0; i < nr_range; i++)
|
||||
set_var_mtrr_range(&var_state, range[i].start, range[i].end - range[i].start + 1);
|
||||
set_var_mtrr_range(&var_state, range[i].start,
|
||||
range[i].end - range[i].start + 1);
|
||||
|
||||
/* Write the last range */
|
||||
range_to_mtrr_with_hole(&var_state, 0);
|
||||
printk(KERN_INFO "DONE variable MTRRs\n");
|
||||
if (var_state.range_sizek != 0)
|
||||
range_to_mtrr_with_hole(&var_state, 0, 0);
|
||||
printk(KERN_DEBUG "DONE variable MTRRs\n");
|
||||
|
||||
num_reg = var_state.reg;
|
||||
/* 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);
|
||||
save_var_mtrr(var_state.reg, 0, 0, 0);
|
||||
var_state.reg++;
|
||||
}
|
||||
|
||||
return num_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)
|
||||
{
|
||||
unsigned long i, base, size;
|
||||
mtrr_type type;
|
||||
struct mtrr_cleanup_result {
|
||||
unsigned long gran_sizek;
|
||||
unsigned long chunk_sizek;
|
||||
unsigned long lose_cover_sizek;
|
||||
unsigned int num_reg;
|
||||
int bad;
|
||||
};
|
||||
|
||||
for (i = 0; i < num_var_ranges; i++) {
|
||||
mtrr_if->get(i, &base, &size, &type);
|
||||
if (type != MTRR_TYPE_WRBACK)
|
||||
continue;
|
||||
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++)
|
||||
printk(KERN_INFO "MTRR MAP PFN: %016lx - %016lx\n", range[i].start, range[i].end + 1);
|
||||
/*
|
||||
* gran_size: 1M, 2M, ..., 2G
|
||||
* chunk size: gran_size, ..., 4G
|
||||
* so we need (2+13)*6
|
||||
*/
|
||||
#define NUM_RESULT 90
|
||||
#define PSHIFT (PAGE_SHIFT - 10)
|
||||
|
||||
/* take out UC ranges */
|
||||
for (i = 0; i < num_var_ranges; i++) {
|
||||
mtrr_if->get(i, &base, &size, &type);
|
||||
if (type != MTRR_TYPE_UNCACHABLE)
|
||||
continue;
|
||||
if (!size)
|
||||
continue;
|
||||
subtract_range(range, base, base + size - 1);
|
||||
}
|
||||
if (extra_remove_size)
|
||||
subtract_range(range, extra_remove_base, extra_remove_base + extra_remove_size - 1);
|
||||
|
||||
/* get new range num */
|
||||
nr_range = 0;
|
||||
for (i = 0; i < RANGE_NUM; i++) {
|
||||
if (!range[i].end)
|
||||
continue;
|
||||
nr_range++;
|
||||
}
|
||||
printk(KERN_INFO "After UC checking\n");
|
||||
for (i = 0; i < nr_range; i++)
|
||||
printk(KERN_INFO "MTRR MAP PFN: %016lx - %016lx\n", range[i].start, range[i].end + 1);
|
||||
|
||||
/* sort the ranges */
|
||||
sort(range, nr_range, sizeof(struct res_range), cmp_range, NULL);
|
||||
printk(KERN_INFO "After sorting\n");
|
||||
for (i = 0; i < nr_range; i++)
|
||||
printk(KERN_INFO "MTRR MAP PFN: %016lx - %016lx\n", range[i].start, range[i].end + 1);
|
||||
|
||||
return nr_range;
|
||||
}
|
||||
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)
|
||||
{
|
||||
unsigned long extra_remove_base, extra_remove_size;
|
||||
unsigned long i, base, size, def, dummy;
|
||||
struct res_range range[RANGE_NUM];
|
||||
mtrr_type type;
|
||||
int nr_range;
|
||||
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;
|
||||
|
||||
/* extra one for all 0 */
|
||||
int num[MTRR_NUM_TYPES + 1];
|
||||
|
|
@ -1038,10 +1173,20 @@ static int __init mtrr_cleanup(unsigned address_bits)
|
|||
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++) {
|
||||
mtrr_if->get(i, &base, &size, &type);
|
||||
type = range_state[i].type;
|
||||
size = range_state[i].size_pfn;
|
||||
if (type >= MTRR_NUM_TYPES)
|
||||
continue;
|
||||
if (!size)
|
||||
|
|
@ -1062,15 +1207,172 @@ static int __init mtrr_cleanup(unsigned address_bits)
|
|||
extra_remove_size = 0;
|
||||
if (mtrr_tom2) {
|
||||
extra_remove_base = 1 << (32 - PAGE_SHIFT);
|
||||
extra_remove_size = (mtrr_tom2>>PAGE_SHIFT) - extra_remove_base;
|
||||
extra_remove_size =
|
||||
(mtrr_tom2 >> PAGE_SHIFT) - extra_remove_base;
|
||||
}
|
||||
nr_range = x86_get_mtrr_mem_range(range, 0, extra_remove_base, extra_remove_size);
|
||||
nr_range = x86_get_mtrr_mem_range(range, 0, extra_remove_base,
|
||||
extra_remove_size);
|
||||
range_sums = sum_ranges(range, nr_range);
|
||||
printk(KERN_INFO "total RAM coverred: %ldM\n",
|
||||
range_sums >> (20 - PAGE_SHIFT));
|
||||
|
||||
/* convert ranges to var ranges state */
|
||||
x86_setup_var_mtrrs(range, nr_range, address_bits);
|
||||
if (mtrr_chunk_size && mtrr_gran_size) {
|
||||
int num_reg;
|
||||
|
||||
return 1;
|
||||
/* 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;
|
||||
|
||||
printk(KERN_INFO " %sgran_size: %ldM \tchunk_size: %ldM \t",
|
||||
result[i].bad?" BAD ":"", result[i].gran_sizek >> 10,
|
||||
result[i].chunk_sizek >> 10);
|
||||
printk(KERN_CONT "num_reg: %d \tlose cover RAM: %s%ldM \n",
|
||||
result[i].num_reg, result[i].bad?"-":"",
|
||||
result[i].lose_cover_sizek >> 10);
|
||||
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");
|
||||
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<<20); gran_size < (1ULL<<32); gran_size <<= 1) {
|
||||
for (chunk_size = gran_size; chunk_size < (1ULL<<33);
|
||||
chunk_size <<= 1) {
|
||||
int num_reg;
|
||||
|
||||
printk(KERN_INFO
|
||||
"\ngran_size: %lldM chunk_size_size: %lldM\n",
|
||||
gran_size >> 20, chunk_size >> 20);
|
||||
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;
|
||||
}
|
||||
|
||||
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++) {
|
||||
printk(KERN_INFO "%sgran_size: %ldM \tchunk_size: %ldM \t",
|
||||
result[i].bad?"*BAD* ":" ", result[i].gran_sizek >> 10,
|
||||
result[i].chunk_sizek >> 10);
|
||||
printk(KERN_CONT "num_reg: %d \tlose cover RAM: %s%ldM \n",
|
||||
result[i].num_reg, result[i].bad?"-":"",
|
||||
result[i].lose_cover_sizek >> 10);
|
||||
}
|
||||
|
||||
/* 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 = 1; i < num_var_ranges + 1 - nr_mtrr_spare_reg; i++) {
|
||||
if (!min_loss_pfn[i]) {
|
||||
num_reg_good = i;
|
||||
break;
|
||||
}
|
||||
}
|
||||
|
||||
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;
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
if (index_good != -1) {
|
||||
printk(KERN_INFO "Found optimal setting for mtrr clean up\n");
|
||||
i = index_good;
|
||||
printk(KERN_INFO "gran_size: %ldM \tchunk_size: %ldM \t",
|
||||
result[i].gran_sizek >> 10,
|
||||
result[i].chunk_sizek >> 10);
|
||||
printk(KERN_CONT "num_reg: %d \tlose cover RAM: %ldM \n",
|
||||
result[i].num_reg,
|
||||
result[i].lose_cover_sizek >> 10);
|
||||
/* convert ranges to var ranges state */
|
||||
chunk_size = result[i].chunk_sizek;
|
||||
chunk_size <<= 10;
|
||||
gran_size = result[i].gran_sizek;
|
||||
gran_size <<= 10;
|
||||
x86_setup_var_mtrrs(range, nr_range, chunk_size, gran_size);
|
||||
set_var_mtrr_all(address_bits);
|
||||
return 1;
|
||||
}
|
||||
|
||||
printk(KERN_INFO "mtrr_cleanup: can not find optimal value\n");
|
||||
printk(KERN_INFO "please specify mtrr_gran_size/mtrr_chunk_size\n");
|
||||
|
||||
return 0;
|
||||
}
|
||||
#else
|
||||
static int __init mtrr_cleanup(unsigned address_bits)
|
||||
{
|
||||
return 0;
|
||||
}
|
||||
#endif
|
||||
|
||||
static int __initdata changed_by_mtrr_cleanup;
|
||||
|
||||
static int disable_mtrr_trim;
|
||||
|
||||
|
|
@ -1111,7 +1413,8 @@ int __init amd_special_default_mtrr(void)
|
|||
return 0;
|
||||
}
|
||||
|
||||
static u64 __init real_trim_memory(unsigned long start_pfn, unsigned long limit_pfn)
|
||||
static u64 __init real_trim_memory(unsigned long start_pfn,
|
||||
unsigned long limit_pfn)
|
||||
{
|
||||
u64 trim_start, trim_size;
|
||||
trim_start = start_pfn;
|
||||
|
|
@ -1138,9 +1441,8 @@ int __init mtrr_trim_uncached_memory(unsigned long end_pfn)
|
|||
{
|
||||
unsigned long i, base, size, highest_pfn = 0, def, dummy;
|
||||
mtrr_type type;
|
||||
struct res_range range[RANGE_NUM];
|
||||
int nr_range;
|
||||
u64 total_real_trim_size;
|
||||
u64 total_trim_size;
|
||||
|
||||
/* extra one for all 0 */
|
||||
int num[MTRR_NUM_TYPES + 1];
|
||||
|
|
@ -1155,11 +1457,22 @@ int __init mtrr_trim_uncached_memory(unsigned long end_pfn)
|
|||
if (def != MTRR_TYPE_UNCACHABLE)
|
||||
return 0;
|
||||
|
||||
/* Find highest cached pfn */
|
||||
/* 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;
|
||||
}
|
||||
|
||||
/* Find highest cached pfn */
|
||||
for (i = 0; i < num_var_ranges; i++) {
|
||||
type = range_state[i].type;
|
||||
if (type != MTRR_TYPE_WRBACK)
|
||||
continue;
|
||||
base = range_state[i].base_pfn;
|
||||
size = range_state[i].size_pfn;
|
||||
if (highest_pfn < base + size)
|
||||
highest_pfn = base + size;
|
||||
}
|
||||
|
|
@ -1177,9 +1490,10 @@ int __init mtrr_trim_uncached_memory(unsigned long end_pfn)
|
|||
/* check entries number */
|
||||
memset(num, 0, sizeof(num));
|
||||
for (i = 0; i < num_var_ranges; i++) {
|
||||
mtrr_if->get(i, &base, &size, &type);
|
||||
type = range_state[i].type;
|
||||
if (type >= MTRR_NUM_TYPES)
|
||||
continue;
|
||||
size = range_state[i].size_pfn;
|
||||
if (!size)
|
||||
type = MTRR_NUM_TYPES;
|
||||
num[type]++;
|
||||
|
|
@ -1205,26 +1519,28 @@ int __init mtrr_trim_uncached_memory(unsigned long end_pfn)
|
|||
}
|
||||
nr_range = x86_get_mtrr_mem_range(range, nr_range, 0, 0);
|
||||
|
||||
total_real_trim_size = 0;
|
||||
total_trim_size = 0;
|
||||
/* check the head */
|
||||
if (range[0].start)
|
||||
total_real_trim_size += real_trim_memory(0, range[0].start);
|
||||
total_trim_size += real_trim_memory(0, range[0].start);
|
||||
/* check the holes */
|
||||
for (i = 0; i < nr_range - 1; i++) {
|
||||
if (range[i].end + 1 < range[i+1].start)
|
||||
total_real_trim_size += real_trim_memory(range[i].end + 1, range[i+1].start);
|
||||
total_trim_size += real_trim_memory(range[i].end + 1,
|
||||
range[i+1].start);
|
||||
}
|
||||
/* check the top */
|
||||
i = nr_range - 1;
|
||||
if (range[i].end + 1 < end_pfn)
|
||||
total_real_trim_size += real_trim_memory(range[i].end + 1, end_pfn);
|
||||
total_trim_size += real_trim_memory(range[i].end + 1,
|
||||
end_pfn);
|
||||
|
||||
if (total_real_trim_size) {
|
||||
if (total_trim_size) {
|
||||
printk(KERN_WARNING "WARNING: BIOS bug: CPU MTRRs don't cover"
|
||||
" all of memory, losing %lluMB of RAM.\n",
|
||||
total_real_trim_size >> 20);
|
||||
total_trim_size >> 20);
|
||||
|
||||
if (enable_mtrr_cleanup < 1)
|
||||
if (!changed_by_mtrr_cleanup)
|
||||
WARN_ON(1);
|
||||
|
||||
printk(KERN_INFO "update e820 for mtrr\n");
|
||||
|
|
@ -1314,8 +1630,10 @@ void __init mtrr_bp_init(void)
|
|||
if (use_intel()) {
|
||||
get_mtrr_state();
|
||||
|
||||
if (mtrr_cleanup(phys_addr))
|
||||
if (mtrr_cleanup(phys_addr)) {
|
||||
changed_by_mtrr_cleanup = 1;
|
||||
mtrr_if->set_all();
|
||||
}
|
||||
|
||||
}
|
||||
}
|
||||
|
|
@ -1355,7 +1673,7 @@ static int __init mtrr_init_finialize(void)
|
|||
if (!mtrr_if)
|
||||
return 0;
|
||||
if (use_intel()) {
|
||||
if (enable_mtrr_cleanup < 1)
|
||||
if (!changed_by_mtrr_cleanup)
|
||||
mtrr_state_warn();
|
||||
} else {
|
||||
/* The CPUs haven't MTRR and seem to not support SMP. They have
|
||||
|
|
|
|||
Loading…
Reference in New Issue