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x86: Move range related operation to one file
We have almost the same code for mtrr cleanup and amd_bus checkup, and this code will also be used in replacing bootmem with early_res, so try to move them together and reuse it from different parts. Also rename update_range to subtract_range as that is what the function is actually doing. -v2: update comments as Christoph requested Signed-off-by: Yinghai Lu <yinghai@kernel.org> LKML-Reference: <1265793639-15071-4-git-send-email-yinghai@kernel.org> Signed-off-by: H. Peter Anvin <hpa@zytor.com>
This commit is contained in:
Yinghai Lu
H. Peter Anvin
parent
c85e4aae69
commit
27811d8cab
@ -22,10 +22,10 @@
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#include <linux/pci.h>
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#include <linux/smp.h>
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#include <linux/cpu.h>
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#include <linux/sort.h>
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#include <linux/mutex.h>
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#include <linux/uaccess.h>
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#include <linux/kvm_para.h>
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#include <linux/range.h>
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#include <asm/processor.h>
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#include <asm/e820.h>
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@ -34,11 +34,6 @@
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#include "mtrr.h"
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struct res_range {
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unsigned long start;
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unsigned long end;
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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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@ -56,7 +51,7 @@ struct var_mtrr_state {
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/* Should be related to MTRR_VAR_RANGES nums */
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#define RANGE_NUM 256
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static struct res_range __initdata range[RANGE_NUM];
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static struct range __initdata range[RANGE_NUM];
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static int __initdata nr_range;
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static struct var_mtrr_range_state __initdata range_state[RANGE_NUM];
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@ -64,152 +59,11 @@ static struct var_mtrr_range_state __initdata range_state[RANGE_NUM];
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static int __initdata debug_print;
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#define Dprintk(x...) do { if (debug_print) printk(KERN_DEBUG x); } while (0)
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static int __init
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add_range(struct res_range *range, int nr_range,
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unsigned long start, unsigned long end)
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{
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/* Out of slots: */
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if (nr_range >= RANGE_NUM)
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return nr_range;
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range[nr_range].start = start;
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range[nr_range].end = end;
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nr_range++;
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return nr_range;
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}
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static int __init
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add_range_with_merge(struct res_range *range, int nr_range,
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unsigned long start, unsigned long end)
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{
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int i;
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/* Try to merge it with old one: */
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for (i = 0; i < nr_range; i++) {
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unsigned long final_start, final_end;
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unsigned long common_start, common_end;
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if (!range[i].end)
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continue;
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common_start = max(range[i].start, start);
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common_end = min(range[i].end, end);
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if (common_start > common_end + 1)
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continue;
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final_start = min(range[i].start, start);
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final_end = max(range[i].end, end);
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range[i].start = final_start;
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range[i].end = final_end;
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return nr_range;
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}
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/* Need to add it: */
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return add_range(range, nr_range, start, end);
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}
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static void __init
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subtract_range(struct res_range *range, unsigned long start, unsigned long end)
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{
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int i, j;
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for (j = 0; j < RANGE_NUM; j++) {
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if (!range[j].end)
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continue;
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if (start <= range[j].start && end >= range[j].end) {
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range[j].start = 0;
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range[j].end = 0;
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continue;
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}
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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 &&
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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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if (start > range[j].start && end < range[j].end) {
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/* Find the new spare: */
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for (i = 0; i < RANGE_NUM; i++) {
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if (range[i].end == 0)
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break;
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}
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if (i < RANGE_NUM) {
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range[i].end = range[j].end;
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range[i].start = end + 1;
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} else {
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printk(KERN_ERR "run of slot in ranges\n");
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}
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range[j].end = start - 1;
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continue;
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}
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}
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}
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static int __init cmp_range(const void *x1, const void *x2)
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{
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const struct res_range *r1 = x1;
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const struct res_range *r2 = x2;
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long start1, start2;
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start1 = r1->start;
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start2 = r2->start;
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return start1 - start2;
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}
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static int __init clean_sort_range(struct res_range *range, int az)
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{
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int i, j, k = az - 1, nr_range = 0;
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for (i = 0; i < k; i++) {
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if (range[i].end)
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continue;
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for (j = k; j > i; j--) {
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if (range[j].end) {
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k = j;
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break;
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}
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}
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if (j == i)
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break;
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range[i].start = range[k].start;
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range[i].end = range[k].end;
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range[k].start = 0;
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range[k].end = 0;
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k--;
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}
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/* count it */
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for (i = 0; i < az; i++) {
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if (!range[i].end) {
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nr_range = i;
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break;
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}
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}
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/* sort them */
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sort(range, nr_range, sizeof(struct res_range), cmp_range, NULL);
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return nr_range;
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}
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#define BIOS_BUG_MSG KERN_WARNING \
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"WARNING: BIOS bug: VAR MTRR %d contains strange UC entry under 1M, check with your system vendor!\n"
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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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x86_get_mtrr_mem_range(struct 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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@ -223,13 +77,13 @@ x86_get_mtrr_mem_range(struct res_range *range, int nr_range,
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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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nr_range = add_range_with_merge(range, RANGE_NUM, nr_range,
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base, base + size - 1);
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}
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if (debug_print) {
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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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printk(KERN_DEBUG "MTRR MAP PFN: %016llx - %016llx\n",
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range[i].start, range[i].end + 1);
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}
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@ -252,10 +106,10 @@ x86_get_mtrr_mem_range(struct res_range *range, int nr_range,
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size -= (1<<(20-PAGE_SHIFT)) - base;
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base = 1<<(20-PAGE_SHIFT);
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}
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subtract_range(range, base, base + size - 1);
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subtract_range(range, RANGE_NUM, 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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subtract_range(range, RANGE_NUM, extra_remove_base,
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extra_remove_base + extra_remove_size - 1);
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if (debug_print) {
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@ -263,7 +117,7 @@ x86_get_mtrr_mem_range(struct res_range *range, int nr_range,
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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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printk(KERN_DEBUG "MTRR MAP PFN: %016lx - %016lx\n",
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printk(KERN_DEBUG "MTRR MAP PFN: %016llx - %016llx\n",
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range[i].start, range[i].end + 1);
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}
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}
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@ -273,20 +127,16 @@ x86_get_mtrr_mem_range(struct res_range *range, int nr_range,
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if (debug_print) {
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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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printk(KERN_DEBUG "MTRR MAP PFN: %016llx - %016llx\n",
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range[i].start, range[i].end + 1);
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}
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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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#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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static unsigned long __init sum_ranges(struct range *range, int nr_range)
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{
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unsigned long sum = 0;
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int i;
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@ -621,7 +471,7 @@ static int __init parse_mtrr_spare_reg(char *arg)
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early_param("mtrr_spare_reg_nr", parse_mtrr_spare_reg);
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static int __init
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x86_setup_var_mtrrs(struct res_range *range, int nr_range,
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x86_setup_var_mtrrs(struct range *range, int nr_range,
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u64 chunk_size, u64 gran_size)
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{
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struct var_mtrr_state var_state;
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@ -742,7 +592,7 @@ mtrr_calc_range_state(u64 chunk_size, u64 gran_size,
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unsigned long x_remove_base,
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unsigned long x_remove_size, int i)
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{
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static struct res_range range_new[RANGE_NUM];
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static struct range range_new[RANGE_NUM];
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unsigned long range_sums_new;
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static int nr_range_new;
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int num_reg;
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@ -869,10 +719,10 @@ int __init mtrr_cleanup(unsigned address_bits)
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* [0, 1M) should always be covered by var mtrr with WB
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* and fixed mtrrs should take effect before var mtrr for it:
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*/
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nr_range = add_range_with_merge(range, nr_range, 0,
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nr_range = add_range_with_merge(range, RANGE_NUM, nr_range, 0,
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(1ULL<<(20 - PAGE_SHIFT)) - 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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sort_range(range, nr_range);
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range_sums = sum_ranges(range, nr_range);
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printk(KERN_INFO "total RAM covered: %ldM\n",
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@ -7,6 +7,8 @@
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#include <linux/string.h>
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#include <linux/pci.h>
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#include <linux/dmi.h>
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#include <linux/range.h>
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#include <asm/pci-direct.h>
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#include <linux/sort.h>
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#include <asm/io.h>
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@ -30,11 +32,6 @@ static struct pci_hostbridge_probe pci_probes[] __cpuinitdata = {
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{ 0xff, 0, PCI_VENDOR_ID_AMD, 0x1200 },
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};
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struct range {
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u64 start;
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u64 end;
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};
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static int __cpuinit cmp_range(const void *x1, const void *x2)
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{
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const struct range *r1 = x1;
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@ -2,6 +2,8 @@
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#include <linux/pci.h>
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#include <linux/topology.h>
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#include <linux/cpu.h>
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#include <linux/range.h>
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#include <asm/pci_x86.h>
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#ifdef CONFIG_X86_64
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@ -17,58 +19,6 @@
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#ifdef CONFIG_X86_64
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#define RANGE_NUM 16
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struct res_range {
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size_t start;
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size_t end;
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};
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static void __init update_range(struct res_range *range, size_t start,
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size_t end)
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{
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int i;
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int j;
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for (j = 0; j < RANGE_NUM; j++) {
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if (!range[j].end)
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continue;
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if (start <= range[j].start && end >= range[j].end) {
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range[j].start = 0;
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range[j].end = 0;
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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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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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range[j].end = start - 1;
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continue;
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}
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if (start > range[j].start && end < range[j].end) {
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/* find the new spare */
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for (i = 0; i < RANGE_NUM; i++) {
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if (range[i].end == 0)
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break;
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}
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if (i < RANGE_NUM) {
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range[i].end = range[j].end;
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range[i].start = end + 1;
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} else {
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printk(KERN_ERR "run of slot in ranges\n");
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}
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range[j].end = start - 1;
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continue;
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}
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}
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}
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struct pci_hostbridge_probe {
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u32 bus;
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u32 slot;
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@ -111,6 +61,8 @@ static void __init get_pci_mmcfg_amd_fam10h_range(void)
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fam10h_mmconf_end = base + (1ULL<<(segn_busn_bits + 20)) - 1;
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}
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#define RANGE_NUM 16
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/**
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* early_fill_mp_bus_to_node()
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* called before pcibios_scan_root and pci_scan_bus
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@ -132,7 +84,7 @@ static int __init early_fill_mp_bus_info(void)
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struct resource *res;
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size_t start;
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size_t end;
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struct res_range range[RANGE_NUM];
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struct range range[RANGE_NUM];
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u64 val;
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u32 address;
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@ -226,7 +178,7 @@ static int __init early_fill_mp_bus_info(void)
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if (end > 0xffff)
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end = 0xffff;
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update_res(info, start, end, IORESOURCE_IO, 1);
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update_range(range, start, end);
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subtract_range(range, RANGE_NUM, start, end);
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}
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/* add left over io port range to def node/link, [0, 0xffff] */
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/* find the position */
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@ -256,14 +208,14 @@ static int __init early_fill_mp_bus_info(void)
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end = (val & 0xffffff800000ULL);
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printk(KERN_INFO "TOM: %016lx aka %ldM\n", end, end>>20);
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if (end < (1ULL<<32))
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update_range(range, 0, end - 1);
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subtract_range(range, RANGE_NUM, 0, end - 1);
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/* get mmconfig */
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get_pci_mmcfg_amd_fam10h_range();
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/* need to take out mmconf range */
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if (fam10h_mmconf_end) {
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printk(KERN_DEBUG "Fam 10h mmconf [%llx, %llx]\n", fam10h_mmconf_start, fam10h_mmconf_end);
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update_range(range, fam10h_mmconf_start, fam10h_mmconf_end);
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subtract_range(range, RANGE_NUM, fam10h_mmconf_start, fam10h_mmconf_end);
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}
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/* mmio resource */
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@ -318,7 +270,7 @@ static int __init early_fill_mp_bus_info(void)
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/* we got a hole */
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endx = fam10h_mmconf_start - 1;
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update_res(info, start, endx, IORESOURCE_MEM, 0);
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update_range(range, start, endx);
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subtract_range(range, RANGE_NUM, start, endx);
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printk(KERN_CONT " ==> [%llx, %llx]", (u64)start, endx);
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start = fam10h_mmconf_end + 1;
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changed = 1;
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@ -334,7 +286,7 @@ static int __init early_fill_mp_bus_info(void)
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}
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update_res(info, start, end, IORESOURCE_MEM, 1);
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update_range(range, start, end);
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subtract_range(range, RANGE_NUM, start, end);
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printk(KERN_CONT "\n");
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}
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@ -349,7 +301,7 @@ static int __init early_fill_mp_bus_info(void)
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rdmsrl(address, val);
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end = (val & 0xffffff800000ULL);
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printk(KERN_INFO "TOM2: %016lx aka %ldM\n", end, end>>20);
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update_range(range, 1ULL<<32, end - 1);
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subtract_range(range, RANGE_NUM, 1ULL<<32, end - 1);
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}
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/*
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22
include/linux/range.h
Normal file
22
include/linux/range.h
Normal file
@ -0,0 +1,22 @@
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#ifndef _LINUX_RANGE_H
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#define _LINUX_RANGE_H
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struct range {
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u64 start;
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u64 end;
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};
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|
||||
int add_range(struct range *range, int az, int nr_range,
|
||||
u64 start, u64 end);
|
||||
|
||||
|
||||
int add_range_with_merge(struct range *range, int az, int nr_range,
|
||||
u64 start, u64 end);
|
||||
|
||||
void subtract_range(struct range *range, int az, u64 start, u64 end);
|
||||
|
||||
int clean_sort_range(struct range *range, int az);
|
||||
|
||||
void sort_range(struct range *range, int nr_range);
|
||||
|
||||
#endif
|
||||
@ -10,7 +10,7 @@ obj-y = sched.o fork.o exec_domain.o panic.o printk.o \
|
||||
kthread.o wait.o kfifo.o sys_ni.o posix-cpu-timers.o mutex.o \
|
||||
hrtimer.o rwsem.o nsproxy.o srcu.o semaphore.o \
|
||||
notifier.o ksysfs.o pm_qos_params.o sched_clock.o cred.o \
|
||||
async.o
|
||||
async.o range.o
|
||||
obj-y += groups.o
|
||||
|
||||
ifdef CONFIG_FUNCTION_TRACER
|
||||
|
||||
163
kernel/range.c
Normal file
163
kernel/range.c
Normal file
@ -0,0 +1,163 @@
|
||||
/*
|
||||
* Range add and subtract
|
||||
*/
|
||||
#include <linux/module.h>
|
||||
#include <linux/init.h>
|
||||
#include <linux/sort.h>
|
||||
|
||||
#include <linux/range.h>
|
||||
|
||||
#ifndef ARRAY_SIZE
|
||||
#define ARRAY_SIZE(x) (sizeof(x) / sizeof((x)[0]))
|
||||
#endif
|
||||
|
||||
int add_range(struct range *range, int az, int nr_range, u64 start, u64 end)
|
||||
{
|
||||
if (start > end)
|
||||
return nr_range;
|
||||
|
||||
/* Out of slots: */
|
||||
if (nr_range >= az)
|
||||
return nr_range;
|
||||
|
||||
range[nr_range].start = start;
|
||||
range[nr_range].end = end;
|
||||
|
||||
nr_range++;
|
||||
|
||||
return nr_range;
|
||||
}
|
||||
|
||||
int add_range_with_merge(struct range *range, int az, int nr_range,
|
||||
u64 start, u64 end)
|
||||
{
|
||||
int i;
|
||||
|
||||
if (start > end)
|
||||
return nr_range;
|
||||
|
||||
/* Try to merge it with old one: */
|
||||
for (i = 0; i < nr_range; i++) {
|
||||
u64 final_start, final_end;
|
||||
u64 common_start, common_end;
|
||||
|
||||
if (!range[i].end)
|
||||
continue;
|
||||
|
||||
common_start = max(range[i].start, start);
|
||||
common_end = min(range[i].end, end);
|
||||
if (common_start > common_end + 1)
|
||||
continue;
|
||||
|
||||
final_start = min(range[i].start, start);
|
||||
final_end = max(range[i].end, end);
|
||||
|
||||
range[i].start = final_start;
|
||||
range[i].end = final_end;
|
||||
return nr_range;
|
||||
}
|
||||
|
||||
/* Need to add it: */
|
||||
return add_range(range, az, nr_range, start, end);
|
||||
}
|
||||
|
||||
void subtract_range(struct range *range, int az, u64 start, u64 end)
|
||||
{
|
||||
int i, j;
|
||||
|
||||
if (start > end)
|
||||
return;
|
||||
|
||||
for (j = 0; j < az; j++) {
|
||||
if (!range[j].end)
|
||||
continue;
|
||||
|
||||
if (start <= range[j].start && end >= range[j].end) {
|
||||
range[j].start = 0;
|
||||
range[j].end = 0;
|
||||
continue;
|
||||
}
|
||||
|
||||
if (start <= range[j].start && end < range[j].end &&
|
||||
range[j].start < end + 1) {
|
||||
range[j].start = end + 1;
|
||||
continue;
|
||||
}
|
||||
|
||||
|
||||
if (start > range[j].start && end >= range[j].end &&
|
||||
range[j].end > start - 1) {
|
||||
range[j].end = start - 1;
|
||||
continue;
|
||||
}
|
||||
|
||||
if (start > range[j].start && end < range[j].end) {
|
||||
/* Find the new spare: */
|
||||
for (i = 0; i < az; i++) {
|
||||
if (range[i].end == 0)
|
||||
break;
|
||||
}
|
||||
if (i < az) {
|
||||
range[i].end = range[j].end;
|
||||
range[i].start = end + 1;
|
||||
} else {
|
||||
printk(KERN_ERR "run of slot in ranges\n");
|
||||
}
|
||||
range[j].end = start - 1;
|
||||
continue;
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
static int cmp_range(const void *x1, const void *x2)
|
||||
{
|
||||
const struct range *r1 = x1;
|
||||
const struct range *r2 = x2;
|
||||
s64 start1, start2;
|
||||
|
||||
start1 = r1->start;
|
||||
start2 = r2->start;
|
||||
|
||||
return start1 - start2;
|
||||
}
|
||||
|
||||
int clean_sort_range(struct range *range, int az)
|
||||
{
|
||||
int i, j, k = az - 1, nr_range = 0;
|
||||
|
||||
for (i = 0; i < k; i++) {
|
||||
if (range[i].end)
|
||||
continue;
|
||||
for (j = k; j > i; j--) {
|
||||
if (range[j].end) {
|
||||
k = j;
|
||||
break;
|
||||
}
|
||||
}
|
||||
if (j == i)
|
||||
break;
|
||||
range[i].start = range[k].start;
|
||||
range[i].end = range[k].end;
|
||||
range[k].start = 0;
|
||||
range[k].end = 0;
|
||||
k--;
|
||||
}
|
||||
/* count it */
|
||||
for (i = 0; i < az; i++) {
|
||||
if (!range[i].end) {
|
||||
nr_range = i;
|
||||
break;
|
||||
}
|
||||
}
|
||||
|
||||
/* sort them */
|
||||
sort(range, nr_range, sizeof(struct range), cmp_range, NULL);
|
||||
|
||||
return nr_range;
|
||||
}
|
||||
|
||||
void sort_range(struct range *range, int nr_range)
|
||||
{
|
||||
/* sort them */
|
||||
sort(range, nr_range, sizeof(struct range), cmp_range, NULL);
|
||||
}
|
||||
Loading…
Reference in New Issue
Block a user