diff options
Diffstat (limited to 'arch/powerpc/mm/book3s64/radix_tlb.c')
| -rw-r--r-- | arch/powerpc/mm/book3s64/radix_tlb.c | 44 |
1 files changed, 27 insertions, 17 deletions
diff --git a/arch/powerpc/mm/book3s64/radix_tlb.c b/arch/powerpc/mm/book3s64/radix_tlb.c index ae12fb5559cb..aefc100d79a7 100644 --- a/arch/powerpc/mm/book3s64/radix_tlb.c +++ b/arch/powerpc/mm/book3s64/radix_tlb.c @@ -1111,14 +1111,13 @@ static unsigned long tlb_local_single_page_flush_ceiling __read_mostly = POWER9_ static inline void __radix__flush_tlb_range(struct mm_struct *mm, unsigned long start, unsigned long end) - { unsigned long pid; unsigned int page_shift = mmu_psize_defs[mmu_virtual_psize].shift; unsigned long page_size = 1UL << page_shift; unsigned long nr_pages = (end - start) >> page_shift; bool fullmm = (end == TLB_FLUSH_ALL); - bool flush_pid; + bool flush_pid, flush_pwc = false; enum tlb_flush_type type; pid = mm->context.id; @@ -1137,8 +1136,16 @@ static inline void __radix__flush_tlb_range(struct mm_struct *mm, flush_pid = nr_pages > tlb_single_page_flush_ceiling; else flush_pid = nr_pages > tlb_local_single_page_flush_ceiling; + /* + * full pid flush already does the PWC flush. if it is not full pid + * flush check the range is more than PMD and force a pwc flush + * mremap() depends on this behaviour. + */ + if (!flush_pid && (end - start) >= PMD_SIZE) + flush_pwc = true; if (!mmu_has_feature(MMU_FTR_GTSE) && type == FLUSH_TYPE_GLOBAL) { + unsigned long type = H_RPTI_TYPE_TLB; unsigned long tgt = H_RPTI_TARGET_CMMU; unsigned long pg_sizes = psize_to_rpti_pgsize(mmu_virtual_psize); @@ -1146,19 +1153,20 @@ static inline void __radix__flush_tlb_range(struct mm_struct *mm, pg_sizes |= psize_to_rpti_pgsize(MMU_PAGE_2M); if (atomic_read(&mm->context.copros) > 0) tgt |= H_RPTI_TARGET_NMMU; - pseries_rpt_invalidate(pid, tgt, H_RPTI_TYPE_TLB, pg_sizes, - start, end); + if (flush_pwc) + type |= H_RPTI_TYPE_PWC; + pseries_rpt_invalidate(pid, tgt, type, pg_sizes, start, end); } else if (flush_pid) { + /* + * We are now flushing a range larger than PMD size force a RIC_FLUSH_ALL + */ if (type == FLUSH_TYPE_LOCAL) { - _tlbiel_pid(pid, RIC_FLUSH_TLB); + _tlbiel_pid(pid, RIC_FLUSH_ALL); } else { if (cputlb_use_tlbie()) { - if (mm_needs_flush_escalation(mm)) - _tlbie_pid(pid, RIC_FLUSH_ALL); - else - _tlbie_pid(pid, RIC_FLUSH_TLB); + _tlbie_pid(pid, RIC_FLUSH_ALL); } else { - _tlbiel_pid_multicast(mm, pid, RIC_FLUSH_TLB); + _tlbiel_pid_multicast(mm, pid, RIC_FLUSH_ALL); } } } else { @@ -1174,6 +1182,9 @@ static inline void __radix__flush_tlb_range(struct mm_struct *mm, if (type == FLUSH_TYPE_LOCAL) { asm volatile("ptesync": : :"memory"); + if (flush_pwc) + /* For PWC, only one flush is needed */ + __tlbiel_pid(pid, 0, RIC_FLUSH_PWC); __tlbiel_va_range(start, end, pid, page_size, mmu_virtual_psize); if (hflush) __tlbiel_va_range(hstart, hend, pid, @@ -1181,6 +1192,8 @@ static inline void __radix__flush_tlb_range(struct mm_struct *mm, ppc_after_tlbiel_barrier(); } else if (cputlb_use_tlbie()) { asm volatile("ptesync": : :"memory"); + if (flush_pwc) + __tlbie_pid(pid, RIC_FLUSH_PWC); __tlbie_va_range(start, end, pid, page_size, mmu_virtual_psize); if (hflush) __tlbie_va_range(hstart, hend, pid, @@ -1188,10 +1201,10 @@ static inline void __radix__flush_tlb_range(struct mm_struct *mm, asm volatile("eieio; tlbsync; ptesync": : :"memory"); } else { _tlbiel_va_range_multicast(mm, - start, end, pid, page_size, mmu_virtual_psize, false); + start, end, pid, page_size, mmu_virtual_psize, flush_pwc); if (hflush) _tlbiel_va_range_multicast(mm, - hstart, hend, pid, PMD_SIZE, MMU_PAGE_2M, false); + hstart, hend, pid, PMD_SIZE, MMU_PAGE_2M, flush_pwc); } } out: @@ -1265,9 +1278,6 @@ void radix__flush_all_lpid_guest(unsigned int lpid) _tlbie_lpid_guest(lpid, RIC_FLUSH_ALL); } -static void radix__flush_tlb_pwc_range_psize(struct mm_struct *mm, unsigned long start, - unsigned long end, int psize); - void radix__tlb_flush(struct mmu_gather *tlb) { int psize = 0; @@ -1374,8 +1384,8 @@ void radix__flush_tlb_range_psize(struct mm_struct *mm, unsigned long start, return __radix__flush_tlb_range_psize(mm, start, end, psize, false); } -static void radix__flush_tlb_pwc_range_psize(struct mm_struct *mm, unsigned long start, - unsigned long end, int psize) +void radix__flush_tlb_pwc_range_psize(struct mm_struct *mm, unsigned long start, + unsigned long end, int psize) { __radix__flush_tlb_range_psize(mm, start, end, psize, true); } |