Commit 46bbffad authored by Linus Torvalds's avatar Linus Torvalds

Merge branch 'x86-mm-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip

* 'x86-mm-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip:
  x86, mm: Unify kernel_physical_mapping_init() API
  x86, mm: Allow highmem user page tables to be disabled at boot time
  x86: Do not reserve brk for DMI if it's not going to be used
  x86: Convert tlbstate_lock to raw_spinlock
  x86: Use the generic page_is_ram()
  x86: Remove BIOS data range from e820
  Move page_is_ram() declaration to mm.h
  Generic page_is_ram: use __weak
  resources: introduce generic page_is_ram()
parents 85fe20bf c1fd1b43
......@@ -2718,6 +2718,13 @@ and is between 256 and 4096 characters. It is defined in the file
medium is write-protected).
Example: quirks=0419:aaf5:rl,0421:0433:rc
userpte=
[X86] Flags controlling user PTE allocations.
nohigh = do not allocate PTE pages in
HIGHMEM regardless of setting
of CONFIG_HIGHPTE.
vdso= [X86,SH]
vdso=2: enable compat VDSO (default with COMPAT_VDSO)
vdso=1: enable VDSO (default)
......
......@@ -298,7 +298,7 @@ void __init fixrange_init(unsigned long start, unsigned long end,
}
#ifndef CONFIG_NEED_MULTIPLE_NODES
static int __init page_is_ram(unsigned long pagenr)
int page_is_ram(unsigned long pagenr)
{
int i;
......
......@@ -59,7 +59,7 @@ static unsigned long setup_zero_page(void)
}
#ifndef CONFIG_NEED_MULTIPLE_NODES
static int __init page_is_ram(unsigned long pagenr)
int page_is_ram(unsigned long pagenr)
{
if (pagenr >= min_low_pfn && pagenr < max_low_pfn)
return 1;
......
......@@ -40,7 +40,6 @@
#ifndef __ASSEMBLY__
extern int page_is_ram(unsigned long pagenr);
extern int devmem_is_allowed(unsigned long pagenr);
extern unsigned long max_low_pfn_mapped;
......
......@@ -22,6 +22,11 @@ static inline void paravirt_release_pmd(unsigned long pfn) {}
static inline void paravirt_release_pud(unsigned long pfn) {}
#endif
/*
* Flags to use when allocating a user page table page.
*/
extern gfp_t __userpte_alloc_gfp;
/*
* Allocate and free page tables.
*/
......
......@@ -517,11 +517,19 @@ u64 __init e820_remove_range(u64 start, u64 size, unsigned old_type,
int checktype)
{
int i;
u64 end;
u64 real_removed_size = 0;
if (size > (ULLONG_MAX - start))
size = ULLONG_MAX - start;
end = start + size;
printk(KERN_DEBUG "e820 remove range: %016Lx - %016Lx ",
(unsigned long long) start,
(unsigned long long) end);
e820_print_type(old_type);
printk(KERN_CONT "\n");
for (i = 0; i < e820.nr_map; i++) {
struct e820entry *ei = &e820.map[i];
u64 final_start, final_end;
......
......@@ -121,7 +121,9 @@
unsigned long max_low_pfn_mapped;
unsigned long max_pfn_mapped;
#ifdef CONFIG_DMI
RESERVE_BRK(dmi_alloc, 65536);
#endif
unsigned int boot_cpu_id __read_mostly;
......@@ -667,6 +669,23 @@ static struct dmi_system_id __initdata bad_bios_dmi_table[] = {
{}
};
static void __init trim_bios_range(void)
{
/*
* A special case is the first 4Kb of memory;
* This is a BIOS owned area, not kernel ram, but generally
* not listed as such in the E820 table.
*/
e820_update_range(0, PAGE_SIZE, E820_RAM, E820_RESERVED);
/*
* special case: Some BIOSen report the PC BIOS
* area (640->1Mb) as ram even though it is not.
* take them out.
*/
e820_remove_range(BIOS_BEGIN, BIOS_END - BIOS_BEGIN, E820_RAM, 1);
sanitize_e820_map(e820.map, ARRAY_SIZE(e820.map), &e820.nr_map);
}
/*
* Determine if we were loaded by an EFI loader. If so, then we have also been
* passed the efi memmap, systab, etc., so we should use these data structures
......@@ -830,7 +849,7 @@ void __init setup_arch(char **cmdline_p)
insert_resource(&iomem_resource, &data_resource);
insert_resource(&iomem_resource, &bss_resource);
trim_bios_range();
#ifdef CONFIG_X86_32
if (ppro_with_ram_bug()) {
e820_update_range(0x70000000ULL, 0x40000ULL, E820_RAM,
......
......@@ -266,16 +266,9 @@ unsigned long __init_refok init_memory_mapping(unsigned long start,
if (!after_bootmem)
find_early_table_space(end, use_pse, use_gbpages);
#ifdef CONFIG_X86_32
for (i = 0; i < nr_range; i++)
kernel_physical_mapping_init(mr[i].start, mr[i].end,
mr[i].page_size_mask);
ret = end;
#else /* CONFIG_X86_64 */
for (i = 0; i < nr_range; i++)
ret = kernel_physical_mapping_init(mr[i].start, mr[i].end,
mr[i].page_size_mask);
#endif
#ifdef CONFIG_X86_32
early_ioremap_page_table_range_init();
......
......@@ -241,6 +241,7 @@ kernel_physical_mapping_init(unsigned long start,
unsigned long page_size_mask)
{
int use_pse = page_size_mask == (1<<PG_LEVEL_2M);
unsigned long last_map_addr = end;
unsigned long start_pfn, end_pfn;
pgd_t *pgd_base = swapper_pg_dir;
int pgd_idx, pmd_idx, pte_ofs;
......@@ -341,9 +342,10 @@ kernel_physical_mapping_init(unsigned long start,
prot = PAGE_KERNEL_EXEC;
pages_4k++;
if (mapping_iter == 1)
if (mapping_iter == 1) {
set_pte(pte, pfn_pte(pfn, init_prot));
else
last_map_addr = (pfn << PAGE_SHIFT) + PAGE_SIZE;
} else
set_pte(pte, pfn_pte(pfn, prot));
}
}
......@@ -368,7 +370,7 @@ kernel_physical_mapping_init(unsigned long start,
mapping_iter = 2;
goto repeat;
}
return 0;
return last_map_addr;
}
pte_t *kmap_pte;
......
......@@ -24,43 +24,6 @@
#include "physaddr.h"
int page_is_ram(unsigned long pagenr)
{
resource_size_t addr, end;
int i;
/*
* A special case is the first 4Kb of memory;
* This is a BIOS owned area, not kernel ram, but generally
* not listed as such in the E820 table.
*/
if (pagenr == 0)
return 0;
/*
* Second special case: Some BIOSen report the PC BIOS
* area (640->1Mb) as ram even though it is not.
*/
if (pagenr >= (BIOS_BEGIN >> PAGE_SHIFT) &&
pagenr < (BIOS_END >> PAGE_SHIFT))
return 0;
for (i = 0; i < e820.nr_map; i++) {
/*
* Not usable memory:
*/
if (e820.map[i].type != E820_RAM)
continue;
addr = (e820.map[i].addr + PAGE_SIZE-1) >> PAGE_SHIFT;
end = (e820.map[i].addr + e820.map[i].size) >> PAGE_SHIFT;
if ((pagenr >= addr) && (pagenr < end))
return 1;
}
return 0;
}
/*
* Fix up the linear direct mapping of the kernel to avoid cache attribute
* conflicts.
......
......@@ -6,6 +6,14 @@
#define PGALLOC_GFP GFP_KERNEL | __GFP_NOTRACK | __GFP_REPEAT | __GFP_ZERO
#ifdef CONFIG_HIGHPTE
#define PGALLOC_USER_GFP __GFP_HIGHMEM
#else
#define PGALLOC_USER_GFP 0
#endif
gfp_t __userpte_alloc_gfp = PGALLOC_GFP | PGALLOC_USER_GFP;
pte_t *pte_alloc_one_kernel(struct mm_struct *mm, unsigned long address)
{
return (pte_t *)__get_free_page(PGALLOC_GFP);
......@@ -15,16 +23,29 @@ pgtable_t pte_alloc_one(struct mm_struct *mm, unsigned long address)
{
struct page *pte;
#ifdef CONFIG_HIGHPTE
pte = alloc_pages(PGALLOC_GFP | __GFP_HIGHMEM, 0);
#else
pte = alloc_pages(PGALLOC_GFP, 0);
#endif
pte = alloc_pages(__userpte_alloc_gfp, 0);
if (pte)
pgtable_page_ctor(pte);
return pte;
}
static int __init setup_userpte(char *arg)
{
if (!arg)
return -EINVAL;
/*
* "userpte=nohigh" disables allocation of user pagetables in
* high memory.
*/
if (strcmp(arg, "nohigh") == 0)
__userpte_alloc_gfp &= ~__GFP_HIGHMEM;
else
return -EINVAL;
return 0;
}
early_param("userpte", setup_userpte);
void ___pte_free_tlb(struct mmu_gather *tlb, struct page *pte)
{
pgtable_page_dtor(pte);
......
......@@ -41,7 +41,7 @@ union smp_flush_state {
struct {
struct mm_struct *flush_mm;
unsigned long flush_va;
spinlock_t tlbstate_lock;
raw_spinlock_t tlbstate_lock;
DECLARE_BITMAP(flush_cpumask, NR_CPUS);
};
char pad[INTERNODE_CACHE_BYTES];
......@@ -181,7 +181,7 @@ static void flush_tlb_others_ipi(const struct cpumask *cpumask,
* num_online_cpus() <= NUM_INVALIDATE_TLB_VECTORS, but it is
* probably not worth checking this for a cache-hot lock.
*/
spin_lock(&f->tlbstate_lock);
raw_spin_lock(&f->tlbstate_lock);
f->flush_mm = mm;
f->flush_va = va;
......@@ -199,7 +199,7 @@ static void flush_tlb_others_ipi(const struct cpumask *cpumask,
f->flush_mm = NULL;
f->flush_va = 0;
spin_unlock(&f->tlbstate_lock);
raw_spin_unlock(&f->tlbstate_lock);
}
void native_flush_tlb_others(const struct cpumask *cpumask,
......@@ -223,7 +223,7 @@ static int __cpuinit init_smp_flush(void)
int i;
for (i = 0; i < ARRAY_SIZE(flush_state); i++)
spin_lock_init(&flush_state[i].tlbstate_lock);
raw_spin_lock_init(&flush_state[i].tlbstate_lock);
return 0;
}
......
......@@ -265,6 +265,8 @@ static inline int get_page_unless_zero(struct page *page)
return atomic_inc_not_zero(&page->_count);
}
extern int page_is_ram(unsigned long pfn);
/* Support for virtually mapped pages */
struct page *vmalloc_to_page(const void *addr);
unsigned long vmalloc_to_pfn(const void *addr);
......
......@@ -327,6 +327,19 @@ int walk_system_ram_range(unsigned long start_pfn, unsigned long nr_pages,
#endif
static int __is_ram(unsigned long pfn, unsigned long nr_pages, void *arg)
{
return 1;
}
/*
* This generic page_is_ram() returns true if specified address is
* registered as "System RAM" in iomem_resource list.
*/
int __weak page_is_ram(unsigned long pfn)
{
return walk_system_ram_range(pfn, 1, NULL, __is_ram) == 1;
}
/*
* Find empty slot in the resource tree given range and alignment.
*/
......
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