mirror of
https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
synced 2024-08-27 03:10:12 +00:00
be77e999e3
We don't init addr_limit correctly for 32 bit applications. So default to using mm->task_size for boundary condition checking. We use addr_limit to only control free space search. This makes sure that we do the right thing with 32 bit applications. We should consolidate the usage of TASK_SIZE/mm->task_size and mm->context.addr_limit later. This partially reverts commitfbfef9027c(powerpc/mm: Switch some TASK_SIZE checks to use mm_context addr_limit). Fixes:fbfef9027c("powerpc/mm: Switch some TASK_SIZE checks to use mm_context addr_limit") Signed-off-by: Aneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com> Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
89 lines
2.3 KiB
C
89 lines
2.3 KiB
C
#include <linux/mm.h>
|
|
#include <linux/hugetlb.h>
|
|
#include <asm/pgtable.h>
|
|
#include <asm/pgalloc.h>
|
|
#include <asm/cacheflush.h>
|
|
#include <asm/machdep.h>
|
|
#include <asm/mman.h>
|
|
#include <asm/tlb.h>
|
|
|
|
void radix__flush_hugetlb_page(struct vm_area_struct *vma, unsigned long vmaddr)
|
|
{
|
|
int psize;
|
|
struct hstate *hstate = hstate_file(vma->vm_file);
|
|
|
|
psize = hstate_get_psize(hstate);
|
|
radix__flush_tlb_page_psize(vma->vm_mm, vmaddr, psize);
|
|
}
|
|
|
|
void radix__local_flush_hugetlb_page(struct vm_area_struct *vma, unsigned long vmaddr)
|
|
{
|
|
int psize;
|
|
struct hstate *hstate = hstate_file(vma->vm_file);
|
|
|
|
psize = hstate_get_psize(hstate);
|
|
radix__local_flush_tlb_page_psize(vma->vm_mm, vmaddr, psize);
|
|
}
|
|
|
|
void radix__flush_hugetlb_tlb_range(struct vm_area_struct *vma, unsigned long start,
|
|
unsigned long end)
|
|
{
|
|
int psize;
|
|
struct hstate *hstate = hstate_file(vma->vm_file);
|
|
|
|
psize = hstate_get_psize(hstate);
|
|
radix__flush_tlb_range_psize(vma->vm_mm, start, end, psize);
|
|
}
|
|
|
|
/*
|
|
* A vairant of hugetlb_get_unmapped_area doing topdown search
|
|
* FIXME!! should we do as x86 does or non hugetlb area does ?
|
|
* ie, use topdown or not based on mmap_is_legacy check ?
|
|
*/
|
|
unsigned long
|
|
radix__hugetlb_get_unmapped_area(struct file *file, unsigned long addr,
|
|
unsigned long len, unsigned long pgoff,
|
|
unsigned long flags)
|
|
{
|
|
struct mm_struct *mm = current->mm;
|
|
struct vm_area_struct *vma;
|
|
struct hstate *h = hstate_file(file);
|
|
struct vm_unmapped_area_info info;
|
|
|
|
if (unlikely(addr > mm->context.addr_limit && addr < TASK_SIZE))
|
|
mm->context.addr_limit = TASK_SIZE;
|
|
|
|
if (len & ~huge_page_mask(h))
|
|
return -EINVAL;
|
|
if (len > mm->task_size)
|
|
return -ENOMEM;
|
|
|
|
if (flags & MAP_FIXED) {
|
|
if (prepare_hugepage_range(file, addr, len))
|
|
return -EINVAL;
|
|
return addr;
|
|
}
|
|
|
|
if (addr) {
|
|
addr = ALIGN(addr, huge_page_size(h));
|
|
vma = find_vma(mm, addr);
|
|
if (mm->task_size - len >= addr &&
|
|
(!vma || addr + len <= vma->vm_start))
|
|
return addr;
|
|
}
|
|
/*
|
|
* We are always doing an topdown search here. Slice code
|
|
* does that too.
|
|
*/
|
|
info.flags = VM_UNMAPPED_AREA_TOPDOWN;
|
|
info.length = len;
|
|
info.low_limit = PAGE_SIZE;
|
|
info.high_limit = current->mm->mmap_base;
|
|
info.align_mask = PAGE_MASK & ~huge_page_mask(h);
|
|
info.align_offset = 0;
|
|
|
|
if (addr > DEFAULT_MAP_WINDOW)
|
|
info.high_limit += mm->context.addr_limit - DEFAULT_MAP_WINDOW;
|
|
|
|
return vm_unmapped_area(&info);
|
|
}
|