Commit 48483760 authored by Aneesh Kumar K.V's avatar Aneesh Kumar K.V Committed by Michael Ellerman

powerpc/mm: Add radix support for hugetlb

Signed-off-by: default avatarAneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com>
Signed-off-by: default avatarMichael Ellerman <mpe@ellerman.id.au>
parent 2f5f0dfd
#ifndef _ASM_POWERPC_BOOK3S_64_HUGETLB_RADIX_H
#define _ASM_POWERPC_BOOK3S_64_HUGETLB_RADIX_H
/*
* For radix we want generic code to handle hugetlb. But then if we want
* both hash and radix to be enabled together we need to workaround the
* limitations.
*/
void radix__flush_hugetlb_page(struct vm_area_struct *vma, unsigned long vmaddr);
void radix__local_flush_hugetlb_page(struct vm_area_struct *vma, unsigned long vmaddr);
extern unsigned long
radix__hugetlb_get_unmapped_area(struct file *file, unsigned long addr,
unsigned long len, unsigned long pgoff,
unsigned long flags);
#endif
......@@ -8,6 +8,8 @@
extern struct kmem_cache *hugepte_cache;
#ifdef CONFIG_PPC_BOOK3S_64
#include <asm/book3s/64/hugetlb-radix.h>
/*
* This should work for other subarchs too. But right now we use the
* new format only for 64bit book3s
......@@ -31,7 +33,19 @@ static inline unsigned int hugepd_shift(hugepd_t hpd)
{
return mmu_psize_to_shift(hugepd_mmu_psize(hpd));
}
static inline void flush_hugetlb_page(struct vm_area_struct *vma,
unsigned long vmaddr)
{
if (radix_enabled())
return radix__flush_hugetlb_page(vma, vmaddr);
}
static inline void __local_flush_hugetlb_page(struct vm_area_struct *vma,
unsigned long vmaddr)
{
if (radix_enabled())
return radix__local_flush_hugetlb_page(vma, vmaddr);
}
#else
static inline pte_t *hugepd_page(hugepd_t hpd)
......
......@@ -34,6 +34,7 @@ obj-$(CONFIG_PPC_MM_SLICES) += slice.o
obj-y += hugetlbpage.o
ifeq ($(CONFIG_HUGETLB_PAGE),y)
obj-$(CONFIG_PPC_STD_MMU_64) += hugetlbpage-hash64.o
obj-$(CONFIG_PPC_RADIX_MMU) += hugetlbpage-radix.o
obj-$(CONFIG_PPC_BOOK3E_MMU) += hugetlbpage-book3e.o
endif
obj-$(CONFIG_TRANSPARENT_HUGEPAGE) += hugepage-hash64.o
......
#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>
void radix__flush_hugetlb_page(struct vm_area_struct *vma, unsigned long vmaddr)
{
unsigned long ap, shift;
struct hstate *hstate = hstate_file(vma->vm_file);
shift = huge_page_shift(hstate);
if (shift == mmu_psize_defs[MMU_PAGE_2M].shift)
ap = mmu_get_ap(MMU_PAGE_2M);
else if (shift == mmu_psize_defs[MMU_PAGE_1G].shift)
ap = mmu_get_ap(MMU_PAGE_1G);
else {
WARN(1, "Wrong huge page shift\n");
return ;
}
radix___flush_tlb_page(vma->vm_mm, vmaddr, ap, 0);
}
void radix__local_flush_hugetlb_page(struct vm_area_struct *vma, unsigned long vmaddr)
{
unsigned long ap, shift;
struct hstate *hstate = hstate_file(vma->vm_file);
shift = huge_page_shift(hstate);
if (shift == mmu_psize_defs[MMU_PAGE_2M].shift)
ap = mmu_get_ap(MMU_PAGE_2M);
else if (shift == mmu_psize_defs[MMU_PAGE_1G].shift)
ap = mmu_get_ap(MMU_PAGE_1G);
else {
WARN(1, "Wrong huge page shift\n");
return ;
}
radix___local_flush_tlb_page(vma->vm_mm, vmaddr, ap, 0);
}
/*
* 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 (len & ~huge_page_mask(h))
return -EINVAL;
if (len > 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 (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;
return vm_unmapped_area(&info);
}
......@@ -711,6 +711,9 @@ unsigned long hugetlb_get_unmapped_area(struct file *file, unsigned long addr,
struct hstate *hstate = hstate_file(file);
int mmu_psize = shift_to_mmu_psize(huge_page_shift(hstate));
if (radix_enabled())
return radix__hugetlb_get_unmapped_area(file, addr, len,
pgoff, flags);
return slice_get_unmapped_area(addr, len, flags, mmu_psize, 1);
}
#endif
......@@ -823,7 +826,7 @@ static int __init hugetlbpage_init(void)
{
int psize;
if (!mmu_has_feature(MMU_FTR_16M_PAGE))
if (!radix_enabled() && !mmu_has_feature(MMU_FTR_16M_PAGE))
return -ENODEV;
for (psize = 0; psize < MMU_PAGE_COUNT; ++psize) {
......@@ -863,6 +866,9 @@ static int __init hugetlbpage_init(void)
HPAGE_SHIFT = mmu_psize_defs[MMU_PAGE_16M].shift;
else if (mmu_psize_defs[MMU_PAGE_1M].shift)
HPAGE_SHIFT = mmu_psize_defs[MMU_PAGE_1M].shift;
else if (mmu_psize_defs[MMU_PAGE_2M].shift)
HPAGE_SHIFT = mmu_psize_defs[MMU_PAGE_2M].shift;
return 0;
}
......
......@@ -141,6 +141,11 @@ void radix___local_flush_tlb_page(struct mm_struct *mm, unsigned long vmaddr,
void radix__local_flush_tlb_page(struct vm_area_struct *vma, unsigned long vmaddr)
{
#ifdef CONFIG_HUGETLB_PAGE
/* need the return fix for nohash.c */
if (vma && is_vm_hugetlb_page(vma))
return __local_flush_hugetlb_page(vma, vmaddr);
#endif
radix___local_flush_tlb_page(vma ? vma->vm_mm : NULL, vmaddr,
mmu_get_ap(mmu_virtual_psize), 0);
}
......@@ -202,6 +207,10 @@ void radix___flush_tlb_page(struct mm_struct *mm, unsigned long vmaddr,
void radix__flush_tlb_page(struct vm_area_struct *vma, unsigned long vmaddr)
{
#ifdef CONFIG_HUGETLB_PAGE
if (vma && is_vm_hugetlb_page(vma))
return flush_hugetlb_page(vma, vmaddr);
#endif
radix___flush_tlb_page(vma ? vma->vm_mm : NULL, vmaddr,
mmu_get_ap(mmu_virtual_psize), 0);
}
......
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