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| author | Heiko Carstens <heiko.carstens@de.ibm.com> | 2014-09-23 21:29:20 +0200 |
|---|---|---|
| committer | Martin Schwidefsky <schwidefsky@de.ibm.com> | 2014-09-30 10:19:29 +0200 |
| commit | cfb0b24143b4f587ff3e3bd829f9f471285d097b (patch) | |
| tree | 217a325aaba02fa8b6a0c91d8dd2abe7b96fcb66 /arch/s390/include | |
| parent | 242a112af62ea73ce507cbe76c2c944c23b6a1e3 (diff) | |
| download | linux-cfb0b24143b4f587ff3e3bd829f9f471285d097b.tar.bz2 | |
s390/mm: make use of ipte range facility
Invalidate several pte entries at once if the ipte range facility
is available. Currently this works only for DEBUG_PAGE_ALLOC where
several up to 2 ^ MAX_ORDER may be invalidated at once.
Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
Diffstat (limited to 'arch/s390/include')
| -rw-r--r-- | arch/s390/include/asm/pgtable.h | 16 |
1 files changed, 16 insertions, 0 deletions
diff --git a/arch/s390/include/asm/pgtable.h b/arch/s390/include/asm/pgtable.h index 7c4af56f2b73..2de229c1b467 100644 --- a/arch/s390/include/asm/pgtable.h +++ b/arch/s390/include/asm/pgtable.h @@ -1053,6 +1053,22 @@ static inline void __ptep_ipte_local(unsigned long address, pte_t *ptep) : "=m" (*ptep) : "m" (*ptep), "a" (pto), "a" (address)); } +static inline void __ptep_ipte_range(unsigned long address, int nr, pte_t *ptep) +{ + unsigned long pto = (unsigned long) ptep; + +#ifndef CONFIG_64BIT + /* pto in ESA mode must point to the start of the segment table */ + pto &= 0x7ffffc00; +#endif + /* Invalidate a range of ptes + global TLB flush of the ptes */ + do { + asm volatile( + " .insn rrf,0xb2210000,%2,%0,%1,0" + : "+a" (address), "+a" (nr) : "a" (pto) : "memory"); + } while (nr != 255); +} + static inline void ptep_flush_direct(struct mm_struct *mm, unsigned long address, pte_t *ptep) { |