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x86: Use memblock to replace early_res

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1. replace find_e820_area with memblock_find_in_range
2. replace reserve_early with memblock_x86_reserve_range
3. replace free_early with memblock_x86_free_range.
4. NO_BOOTMEM will switch to use memblock too.
5. use _e820, _early wrap in the patch, in following patch, will
   replace them all
6. because memblock_x86_free_range support partial free, we can remove some special care
7. Need to make sure that memblock_find_in_range() is called after memblock_x86_fill()
   so adjust some calling later in setup.c::setup_arch()
   -- corruption_check and mptable_update

-v2: Move reserve_brk() early
    Before fill_memblock_area, to avoid overlap between brk and memblock_find_in_range()
    that could happen We have more then 128 RAM entry in E820 tables, and
    memblock_x86_fill() could use memblock_find_in_range() to find a new place for
    memblock.memory.region array.
    and We don't need to use extend_brk() after fill_memblock_area()
    So move reserve_brk() early before fill_memblock_area().
-v3: Move find_smp_config early
    To make sure memblock_find_in_range not find wrong place, if BIOS doesn't put mptable
    in right place.
-v4: Treat RESERVED_KERN as RAM in memblock.memory. and they are already in
    memblock.reserved already..
    use __NOT_KEEP_MEMBLOCK to make sure memblock related code could be freed later.
-v5: Generic version __memblock_find_in_range() is going from high to low, and for 32bit
    active_region for 32bit does include high pages
    need to replace the limit with memblock.default_alloc_limit, aka get_max_mapped()
-v6: Use current_limit instead
-v7: check with MEMBLOCK_ERROR instead of -1ULL or -1L
-v8: Set memblock_can_resize early to handle EFI with more RAM entries
-v9: update after kmemleak changes in mainline

Suggested-by: David S. Miller <davem@davemloft.net>
Suggested-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Suggested-by: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: Yinghai Lu <yinghai@kernel.org>
Signed-off-by: H. Peter Anvin <hpa@zytor.com>
This commit is contained in:
Yinghai Lu
2010-08-25 13:39:17 -07:00
committed by H. Peter Anvin
parent 301ff3e88e
commit 72d7c3b33c
14 changed files with 141 additions and 199 deletions
Download Patch File Download Diff File Expand all files Collapse all files

159
arch/x86/kernel/e820.c
View File

@@ -15,6 +15,7 @@
#include <linux/pfn.h>
#include <linux/suspend.h>
#include <linux/firmware-map.h>
#include <linux/memblock.h>
#include <asm/e820.h>
#include <asm/proto.h>
@@ -742,69 +743,29 @@ core_initcall(e820_mark_nvs_memory);
*/
u64 __init find_e820_area(u64 start, u64 end, u64 size, u64 align)
{
int i;
u64 mem = memblock_find_in_range(start, end, size, align);
for (i = 0; i < e820.nr_map; i++) {
struct e820entry *ei = &e820.map[i];
u64 addr;
u64 ei_start, ei_last;
if (mem == MEMBLOCK_ERROR)
return -1ULL;
if (ei->type != E820_RAM)
continue;
ei_last = ei->addr + ei->size;
ei_start = ei->addr;
addr = find_early_area(ei_start, ei_last, start, end,
size, align);
if (addr != -1ULL)
return addr;
}
return -1ULL;
return mem;
}
u64 __init find_fw_memmap_area(u64 start, u64 end, u64 size, u64 align)
{
return find_e820_area(start, end, size, align);
}
u64 __init get_max_mapped(void)
{
u64 end = max_pfn_mapped;
end <<= PAGE_SHIFT;
return end;
}
/*
* Find next free range after *start
*/
u64 __init find_e820_area_size(u64 start, u64 *sizep, u64 align)
{
int i;
u64 mem = memblock_x86_find_in_range_size(start, sizep, align);
for (i = 0; i < e820.nr_map; i++) {
struct e820entry *ei = &e820.map[i];
u64 addr;
u64 ei_start, ei_last;
if (mem == MEMBLOCK_ERROR)
return -1ULL
if (ei->type != E820_RAM)
continue;
ei_last = ei->addr + ei->size;
ei_start = ei->addr;
addr = find_early_area_size(ei_start, ei_last, start,
sizep, align);
if (addr != -1ULL)
return addr;
}
return -1ULL;
return mem;
}
/*
* pre allocated 4k and reserved it in e820
* pre allocated 4k and reserved it in memblock and e820_saved
*/
u64 __init early_reserve_e820(u64 startt, u64 sizet, u64 align)
{
@@ -813,8 +774,8 @@ u64 __init early_reserve_e820(u64 startt, u64 sizet, u64 align)
u64 start;
for (start = startt; ; start += size) {
start = find_e820_area_size(start, &size, align);
if (!(start + 1))
start = memblock_x86_find_in_range_size(start, &size, align);
if (start == MEMBLOCK_ERROR)
return 0;
if (size >= sizet)
break;
@@ -830,10 +791,9 @@ u64 __init early_reserve_e820(u64 startt, u64 sizet, u64 align)
addr = round_down(start + size - sizet, align);
if (addr < start)
return 0;
e820_update_range(addr, sizet, E820_RAM, E820_RESERVED);
memblock_x86_reserve_range(addr, addr + sizet, "new next");
e820_update_range_saved(addr, sizet, E820_RAM, E820_RESERVED);
printk(KERN_INFO "update e820 for early_reserve_e820\n");
update_e820();
printk(KERN_INFO "update e820_saved for early_reserve_e820\n");
update_e820_saved();
return addr;
@@ -895,52 +855,12 @@ unsigned long __init e820_end_of_low_ram_pfn(void)
{
return e820_end_pfn(1UL<<(32 - PAGE_SHIFT), E820_RAM);
}
/*
* Finds an active region in the address range from start_pfn to last_pfn and
* returns its range in ei_startpfn and ei_endpfn for the e820 entry.
*/
int __init e820_find_active_region(const struct e820entry *ei,
unsigned long start_pfn,
unsigned long last_pfn,
unsigned long *ei_startpfn,
unsigned long *ei_endpfn)
{
u64 align = PAGE_SIZE;
*ei_startpfn = round_up(ei->addr, align) >> PAGE_SHIFT;
*ei_endpfn = round_down(ei->addr + ei->size, align) >> PAGE_SHIFT;
/* Skip map entries smaller than a page */
if (*ei_startpfn >= *ei_endpfn)
return 0;
/* Skip if map is outside the node */
if (ei->type != E820_RAM || *ei_endpfn <= start_pfn ||
*ei_startpfn >= last_pfn)
return 0;
/* Check for overlaps */
if (*ei_startpfn < start_pfn)
*ei_startpfn = start_pfn;
if (*ei_endpfn > last_pfn)
*ei_endpfn = last_pfn;
return 1;
}
/* Walk the e820 map and register active regions within a node */
void __init e820_register_active_regions(int nid, unsigned long start_pfn,
unsigned long last_pfn)
{
unsigned long ei_startpfn;
unsigned long ei_endpfn;
int i;
for (i = 0; i < e820.nr_map; i++)
if (e820_find_active_region(&e820.map[i],
start_pfn, last_pfn,
&ei_startpfn, &ei_endpfn))
add_active_range(nid, ei_startpfn, ei_endpfn);
memblock_x86_register_active_regions(nid, start_pfn, last_pfn);
}
/*
@@ -950,18 +870,16 @@ void __init e820_register_active_regions(int nid, unsigned long start_pfn,
*/
u64 __init e820_hole_size(u64 start, u64 end)
{
unsigned long start_pfn = start >> PAGE_SHIFT;
unsigned long last_pfn = end >> PAGE_SHIFT;
unsigned long ei_startpfn, ei_endpfn, ram = 0;
int i;
return memblock_x86_hole_size(start, end);
}
for (i = 0; i < e820.nr_map; i++) {
if (e820_find_active_region(&e820.map[i],
start_pfn, last_pfn,
&ei_startpfn, &ei_endpfn))
ram += ei_endpfn - ei_startpfn;
}
return end - start - ((u64)ram << PAGE_SHIFT);
void reserve_early(u64 start, u64 end, char *name)
{
memblock_x86_reserve_range(start, end, name);
}
void free_early(u64 start, u64 end)
{
memblock_x86_free_range(start, end);
}
static void early_panic(char *msg)
@@ -1210,3 +1128,32 @@ void __init setup_memory_map(void)
printk(KERN_INFO "BIOS-provided physical RAM map:\n");
e820_print_map(who);
}
void __init memblock_x86_fill(void)
{
int i;
u64 end;
/*
* EFI may have more than 128 entries
* We are safe to enable resizing, beause memblock_x86_fill()
* is rather later for x86
*/
memblock_can_resize = 1;
for (i = 0; i < e820.nr_map; i++) {
struct e820entry *ei = &e820.map[i];
end = ei->addr + ei->size;
if (end != (resource_size_t)end)
continue;
if (ei->type != E820_RAM && ei->type != E820_RESERVED_KERN)
continue;
memblock_add(ei->addr, ei->size);
}
memblock_analyze();
memblock_dump_all();
}