When we are updating pte, we just need to flush the tlb mapping for
that pte. Right now we do a full mm flush because we don't track page
size. Update the interface to track the page size and use that to
do the right tlb flush.
Signed-off-by: Aneesh Kumar K.V <aneesh.ku...@linux.vnet.ibm.com>
---
arch/powerpc/include/asm/book3s/64/pgtable.h | 16 ++++++++++------
arch/powerpc/include/asm/book3s/64/radix.h | 19 ++++++++-----------
arch/powerpc/mm/pgtable-radix.c | 2 +-
3 files changed, 19 insertions(+), 18 deletions(-)
diff --git a/arch/powerpc/include/asm/book3s/64/pgtable.h
b/arch/powerpc/include/asm/book3s/64/pgtable.h
index ef2eef1ba99a..09869ad37aba 100644
--- a/arch/powerpc/include/asm/book3s/64/pgtable.h
+++ b/arch/powerpc/include/asm/book3s/64/pgtable.h
@@ -301,12 +301,16 @@ extern unsigned long pci_io_base;
static inline unsigned long pte_update(struct mm_struct *mm, unsigned long
addr,
pte_t *ptep, unsigned long clr,
- unsigned long set, int huge)
+ unsigned long set,
+ unsigned long pg_sz)
{
+ bool huge = (pg_sz != PAGE_SIZE);
+
if (radix_enabled())
- return radix__pte_update(mm, addr, ptep, clr, set, huge);
+ return radix__pte_update(mm, addr, ptep, clr, set, pg_sz);
return hash__pte_update(mm, addr, ptep, clr, set, huge);
}
+
/*
* For hash even if we have _PAGE_ACCESSED = 0, we do a pte_update.
* We currently remove entries from the hashtable regardless of whether
@@ -324,7 +328,7 @@ static inline int __ptep_test_and_clear_young(struct
mm_struct *mm,
if ((pte_raw(*ptep) & cpu_to_be64(_PAGE_ACCESSED | H_PAGE_HASHPTE)) ==
0)
return 0;
- old = pte_update(mm, addr, ptep, _PAGE_ACCESSED, 0, 0);
+ old = pte_update(mm, addr, ptep, _PAGE_ACCESSED, 0, PAGE_SIZE);
return (old & _PAGE_ACCESSED) != 0;
}
@@ -343,21 +347,21 @@ static inline void ptep_set_wrprotect(struct mm_struct
*mm, unsigned long addr,
if ((pte_raw(*ptep) & cpu_to_be64(_PAGE_WRITE)) == 0)
return;
- pte_update(mm, addr, ptep, _PAGE_WRITE, 0, 0);
+ pte_update(mm, addr, ptep, _PAGE_WRITE, 0, PAGE_SIZE);
}
#define __HAVE_ARCH_PTEP_GET_AND_CLEAR
static inline pte_t ptep_get_and_clear(struct mm_struct *mm,
unsigned long addr, pte_t *ptep)
{
- unsigned long old = pte_update(mm, addr, ptep, ~0UL, 0, 0);
+ unsigned long old = pte_update(mm, addr, ptep, ~0UL, 0, PAGE_SIZE);
return __pte(old);
}
static inline void pte_clear(struct mm_struct *mm, unsigned long addr,
pte_t * ptep)
{
- pte_update(mm, addr, ptep, ~0UL, 0, 0);
+ pte_update(mm, addr, ptep, ~0UL, 0, PAGE_SIZE);
}
static inline int pte_write(pte_t pte)
diff --git a/arch/powerpc/include/asm/book3s/64/radix.h
b/arch/powerpc/include/asm/book3s/64/radix.h
index 279b2f68e00f..aec6e8ee6e27 100644
--- a/arch/powerpc/include/asm/book3s/64/radix.h
+++ b/arch/powerpc/include/asm/book3s/64/radix.h
@@ -129,15 +129,16 @@ static inline unsigned long __radix_pte_update(pte_t
*ptep, unsigned long clr,
static inline unsigned long radix__pte_update(struct mm_struct *mm,
- unsigned long addr,
- pte_t *ptep, unsigned long clr,
- unsigned long set,
- int huge)
+ unsigned long addr,
+ pte_t *ptep, unsigned long clr,
+ unsigned long set,
+ unsigned long pg_sz)
{
unsigned long old_pte;
if (cpu_has_feature(CPU_FTR_POWER9_DD1)) {
+ int psize;
unsigned long new_pte;
old_pte = __radix_pte_update(ptep, ~0, 0);
@@ -146,18 +147,14 @@ static inline unsigned long radix__pte_update(struct
mm_struct *mm,
* new value of pte
*/
new_pte = (old_pte | set) & ~clr;
-
- /*
- * For now let's do heavy pid flush
- * radix__flush_tlb_page_psize(mm, addr, mmu_virtual_psize);
- */
- radix__flush_tlb_mm(mm);
+ psize = radix_get_mmu_psize(pg_sz);
+ radix__flush_tlb_page_psize(mm, addr, psize);
__radix_pte_update(ptep, 0, new_pte);
} else
old_pte = __radix_pte_update(ptep, clr, set);
asm volatile("ptesync" : : : "memory");
- if (!huge)
+ if (pg_sz == PAGE_SIZE)
assert_pte_locked(mm, addr);
return old_pte;
diff --git a/arch/powerpc/mm/pgtable-radix.c b/arch/powerpc/mm/pgtable-radix.c
index 6b1ffc449158..735be6821e90 100644
--- a/arch/powerpc/mm/pgtable-radix.c
+++ b/arch/powerpc/mm/pgtable-radix.c
@@ -482,7 +482,7 @@ unsigned long radix__pmd_hugepage_update(struct mm_struct
*mm, unsigned long add
assert_spin_locked(&mm->page_table_lock);
#endif
- old = radix__pte_update(mm, addr, (pte_t *)pmdp, clr, set, 1);
+ old = radix__pte_update(mm, addr, (pte_t *)pmdp, clr, set,
HPAGE_PMD_SIZE);
trace_hugepage_update(addr, old, clr, set);
return old;
--
2.10.2
