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powerpc/mm/thp: Remove code duplication 

Rename invalidate_old_hpte to flush_hash_hugepage and use that in
other places.

Signed-off-by: Aneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
This commit is contained in:
Aneesh Kumar K.V 2014-11-02 21:15:27 +05:30 committed by Benjamin Herrenschmidt
parent c4f3eb5fc5
commit f1581bf14b
4 changed files with 65 additions and 108 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

3
arch/powerpc/include/asm/tlbflush.h
View File

@ -127,7 +127,8 @@ static inline void arch_leave_lazy_mmu_mode(void)
extern void flush_hash_page(unsigned long vpn, real_pte_t pte, int psize,
int ssize, int local);
extern void flush_hash_range(unsigned long number, int local);
extern void flush_hash_hugepage(unsigned long vsid, unsigned long addr,
pmd_t *pmdp, unsigned int psize, int ssize);
static inline void local_flush_tlb_mm(struct mm_struct *mm)
{

52
arch/powerpc/mm/hash_utils_64.c
View File

@ -1315,6 +1315,58 @@ void flush_hash_page(unsigned long vpn, real_pte_t pte, int psize, int ssize,
#endif
}
#ifdef CONFIG_TRANSPARENT_HUGEPAGE
void flush_hash_hugepage(unsigned long vsid, unsigned long addr,
pmd_t *pmdp, unsigned int psize, int ssize)
{
int i, max_hpte_count, valid;
unsigned long s_addr;
unsigned char *hpte_slot_array;
unsigned long hidx, shift, vpn, hash, slot;
s_addr = addr & HPAGE_PMD_MASK;
hpte_slot_array = get_hpte_slot_array(pmdp);
/*
* IF we try to do a HUGE PTE update after a withdraw is done.
* we will find the below NULL. This happens when we do
* split_huge_page_pmd
*/
if (!hpte_slot_array)
return;
if (ppc_md.hugepage_invalidate)
return ppc_md.hugepage_invalidate(vsid, s_addr, hpte_slot_array,
psize, ssize);
/*
* No bluk hpte removal support, invalidate each entry
*/
shift = mmu_psize_defs[psize].shift;
max_hpte_count = HPAGE_PMD_SIZE >> shift;
for (i = 0; i < max_hpte_count; i++) {
/*
* 8 bits per each hpte entries
* 000| [ secondary group (one bit) | hidx (3 bits) | valid bit]
*/
valid = hpte_valid(hpte_slot_array, i);
if (!valid)
continue;
hidx = hpte_hash_index(hpte_slot_array, i);
/* get the vpn */
addr = s_addr + (i * (1ul << shift));
vpn = hpt_vpn(addr, vsid, ssize);
hash = hpt_hash(vpn, shift, ssize);
if (hidx & _PTEIDX_SECONDARY)
hash = ~hash;
slot = (hash & htab_hash_mask) * HPTES_PER_GROUP;
slot += hidx & _PTEIDX_GROUP_IX;
ppc_md.hpte_invalidate(slot, vpn, psize,
MMU_PAGE_16M, ssize, 0);
}
}
#endif /* CONFIG_TRANSPARENT_HUGEPAGE */
void flush_hash_range(unsigned long number, int local)
{
if (ppc_md.flush_hash_range)

54
arch/powerpc/mm/hugepage-hash64.c
View File

@ -18,57 +18,6 @@
#include <linux/mm.h>
#include <asm/machdep.h>
static void invalidate_old_hpte(unsigned long vsid, unsigned long addr,
pmd_t *pmdp, unsigned int psize, int ssize)
{
int i, max_hpte_count, valid;
unsigned long s_addr;
unsigned char *hpte_slot_array;
unsigned long hidx, shift, vpn, hash, slot;
s_addr = addr & HPAGE_PMD_MASK;
hpte_slot_array = get_hpte_slot_array(pmdp);
/*
* IF we try to do a HUGE PTE update after a withdraw is done.
* we will find the below NULL. This happens when we do
* split_huge_page_pmd
*/
if (!hpte_slot_array)
return;
if (ppc_md.hugepage_invalidate)
return ppc_md.hugepage_invalidate(vsid, s_addr, hpte_slot_array,
psize, ssize);
/*
* No bluk hpte removal support, invalidate each entry
*/
shift = mmu_psize_defs[psize].shift;
max_hpte_count = HPAGE_PMD_SIZE >> shift;
for (i = 0; i < max_hpte_count; i++) {
/*
* 8 bits per each hpte entries
* 000| [ secondary group (one bit) | hidx (3 bits) | valid bit]
*/
valid = hpte_valid(hpte_slot_array, i);
if (!valid)
continue;
hidx = hpte_hash_index(hpte_slot_array, i);
/* get the vpn */
addr = s_addr + (i * (1ul << shift));
vpn = hpt_vpn(addr, vsid, ssize);
hash = hpt_hash(vpn, shift, ssize);
if (hidx & _PTEIDX_SECONDARY)
hash = ~hash;
slot = (hash & htab_hash_mask) * HPTES_PER_GROUP;
slot += hidx & _PTEIDX_GROUP_IX;
ppc_md.hpte_invalidate(slot, vpn, psize,
MMU_PAGE_16M, ssize, 0);
}
}
int __hash_page_thp(unsigned long ea, unsigned long access, unsigned long vsid,
pmd_t *pmdp, unsigned long trap, int local, int ssize,
unsigned int psize)
@ -145,7 +94,8 @@ int __hash_page_thp(unsigned long ea, unsigned long access, unsigned long vsid,
* hash page table entries.
*/
if ((old_pmd & _PAGE_HASHPTE) && !(old_pmd & _PAGE_COMBO))
invalidate_old_hpte(vsid, ea, pmdp, MMU_PAGE_64K, ssize);
flush_hash_hugepage(vsid, ea, pmdp, MMU_PAGE_64K,
ssize);
}
valid = hpte_valid(hpte_slot_array, index);

64
arch/powerpc/mm/pgtable_64.c
View File

@ -739,29 +739,13 @@ void pmdp_invalidate(struct vm_area_struct *vma, unsigned long address,
void hpte_do_hugepage_flush(struct mm_struct *mm, unsigned long addr,
pmd_t *pmdp, unsigned long old_pmd)
{
int ssize, i;
unsigned long s_addr;
int max_hpte_count;
unsigned int psize, valid;
unsigned char *hpte_slot_array;
unsigned long hidx, vpn, vsid, hash, shift, slot;
/*
* Flush all the hptes mapping this hugepage
*/
s_addr = addr & HPAGE_PMD_MASK;
hpte_slot_array = get_hpte_slot_array(pmdp);
/*
* IF we try to do a HUGE PTE update after a withdraw is done.
* we will find the below NULL. This happens when we do
* split_huge_page_pmd
*/
if (!hpte_slot_array)
return;
int ssize;
unsigned int psize;
unsigned long vsid;
/* get the base page size,vsid and segment size */
#ifdef CONFIG_DEBUG_VM
psize = get_slice_psize(mm, s_addr);
psize = get_slice_psize(mm, addr);
BUG_ON(psize == MMU_PAGE_16M);
#endif
if (old_pmd & _PAGE_COMBO)
@ -769,46 +753,16 @@ void hpte_do_hugepage_flush(struct mm_struct *mm, unsigned long addr,
else
psize = MMU_PAGE_64K;
if (!is_kernel_addr(s_addr)) {
ssize = user_segment_size(s_addr);
vsid = get_vsid(mm->context.id, s_addr, ssize);
if (!is_kernel_addr(addr)) {
ssize = user_segment_size(addr);
vsid = get_vsid(mm->context.id, addr, ssize);
WARN_ON(vsid == 0);
} else {
vsid = get_kernel_vsid(s_addr, mmu_kernel_ssize);
vsid = get_kernel_vsid(addr, mmu_kernel_ssize);
ssize = mmu_kernel_ssize;
}
if (ppc_md.hugepage_invalidate)
return ppc_md.hugepage_invalidate(vsid, s_addr,
hpte_slot_array,
psize, ssize);
/*
* No bluk hpte removal support, invalidate each entry
*/
shift = mmu_psize_defs[psize].shift;
max_hpte_count = HPAGE_PMD_SIZE >> shift;
for (i = 0; i < max_hpte_count; i++) {
/*
* 8 bits per each hpte entries
* 000| [ secondary group (one bit) | hidx (3 bits) | valid bit]
*/
valid = hpte_valid(hpte_slot_array, i);
if (!valid)
continue;
hidx = hpte_hash_index(hpte_slot_array, i);
/* get the vpn */
addr = s_addr + (i * (1ul << shift));
vpn = hpt_vpn(addr, vsid, ssize);
hash = hpt_hash(vpn, shift, ssize);
if (hidx & _PTEIDX_SECONDARY)
hash = ~hash;
slot = (hash & htab_hash_mask) * HPTES_PER_GROUP;
slot += hidx & _PTEIDX_GROUP_IX;
ppc_md.hpte_invalidate(slot, vpn, psize,
MMU_PAGE_16M, ssize, 0);
}
return flush_hash_hugepage(vsid, addr, pmdp, psize, ssize);
}
static pmd_t pmd_set_protbits(pmd_t pmd, pgprot_t pgprot)