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author | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2015-06-08 10:19:40 -0700 |
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committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2015-06-08 10:19:40 -0700 |
commit | 987aec39a74373c55c3bedd5c3c83896d78fd0a2 (patch) | |
tree | 66aba6d4f166f269be95fe4d267d57efe533aefd /arch/powerpc | |
parent | 303cda0ea7c1c33701812ccb80d37083a4093c7c (diff) | |
parent | d4a4f75cd8f29cd9464a5a32e9224a91571d6649 (diff) | |
download | op-kernel-dev-987aec39a74373c55c3bedd5c3c83896d78fd0a2.zip op-kernel-dev-987aec39a74373c55c3bedd5c3c83896d78fd0a2.tar.gz |
Merge 4.1-rc7 into driver-core-next
We want the fixes in this branch as well for testing and merge
resolution.
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'arch/powerpc')
-rw-r--r-- | arch/powerpc/kernel/mce.c | 4 | ||||
-rw-r--r-- | arch/powerpc/kernel/vmlinux.lds.S | 1 | ||||
-rw-r--r-- | arch/powerpc/kvm/book3s_hv.c | 5 | ||||
-rw-r--r-- | arch/powerpc/mm/hugetlbpage.c | 25 | ||||
-rw-r--r-- | arch/powerpc/mm/pgtable_64.c | 11 |
5 files changed, 33 insertions, 13 deletions
diff --git a/arch/powerpc/kernel/mce.c b/arch/powerpc/kernel/mce.c index 15c99b6..b2eb468 100644 --- a/arch/powerpc/kernel/mce.c +++ b/arch/powerpc/kernel/mce.c @@ -73,7 +73,7 @@ void save_mce_event(struct pt_regs *regs, long handled, uint64_t nip, uint64_t addr) { uint64_t srr1; - int index = __this_cpu_inc_return(mce_nest_count); + int index = __this_cpu_inc_return(mce_nest_count) - 1; struct machine_check_event *mce = this_cpu_ptr(&mce_event[index]); /* @@ -184,7 +184,7 @@ void machine_check_queue_event(void) if (!get_mce_event(&evt, MCE_EVENT_RELEASE)) return; - index = __this_cpu_inc_return(mce_queue_count); + index = __this_cpu_inc_return(mce_queue_count) - 1; /* If queue is full, just return for now. */ if (index >= MAX_MC_EVT) { __this_cpu_dec(mce_queue_count); diff --git a/arch/powerpc/kernel/vmlinux.lds.S b/arch/powerpc/kernel/vmlinux.lds.S index f096e72..1db6851 100644 --- a/arch/powerpc/kernel/vmlinux.lds.S +++ b/arch/powerpc/kernel/vmlinux.lds.S @@ -213,6 +213,7 @@ SECTIONS *(.opd) } + . = ALIGN(256); .got : AT(ADDR(.got) - LOAD_OFFSET) { __toc_start = .; #ifndef CONFIG_RELOCATABLE diff --git a/arch/powerpc/kvm/book3s_hv.c b/arch/powerpc/kvm/book3s_hv.c index 48d3c5d..df81caa 100644 --- a/arch/powerpc/kvm/book3s_hv.c +++ b/arch/powerpc/kvm/book3s_hv.c @@ -1952,7 +1952,7 @@ static void post_guest_process(struct kvmppc_vcore *vc) */ static noinline void kvmppc_run_core(struct kvmppc_vcore *vc) { - struct kvm_vcpu *vcpu; + struct kvm_vcpu *vcpu, *vnext; int i; int srcu_idx; @@ -1982,7 +1982,8 @@ static noinline void kvmppc_run_core(struct kvmppc_vcore *vc) */ if ((threads_per_core > 1) && ((vc->num_threads > threads_per_subcore) || !on_primary_thread())) { - list_for_each_entry(vcpu, &vc->runnable_threads, arch.run_list) { + list_for_each_entry_safe(vcpu, vnext, &vc->runnable_threads, + arch.run_list) { vcpu->arch.ret = -EBUSY; kvmppc_remove_runnable(vc, vcpu); wake_up(&vcpu->arch.cpu_run); diff --git a/arch/powerpc/mm/hugetlbpage.c b/arch/powerpc/mm/hugetlbpage.c index d230158..6fd3fde 100644 --- a/arch/powerpc/mm/hugetlbpage.c +++ b/arch/powerpc/mm/hugetlbpage.c @@ -689,27 +689,34 @@ void hugetlb_free_pgd_range(struct mmu_gather *tlb, struct page * follow_huge_addr(struct mm_struct *mm, unsigned long address, int write) { - pte_t *ptep; - struct page *page; + pte_t *ptep, pte; unsigned shift; unsigned long mask, flags; + struct page *page = ERR_PTR(-EINVAL); + + local_irq_save(flags); + ptep = find_linux_pte_or_hugepte(mm->pgd, address, &shift); + if (!ptep) + goto no_page; + pte = READ_ONCE(*ptep); /* + * Verify it is a huge page else bail. * Transparent hugepages are handled by generic code. We can skip them * here. */ - local_irq_save(flags); - ptep = find_linux_pte_or_hugepte(mm->pgd, address, &shift); + if (!shift || pmd_trans_huge(__pmd(pte_val(pte)))) + goto no_page; - /* Verify it is a huge page else bail. */ - if (!ptep || !shift || pmd_trans_huge(*(pmd_t *)ptep)) { - local_irq_restore(flags); - return ERR_PTR(-EINVAL); + if (!pte_present(pte)) { + page = NULL; + goto no_page; } mask = (1UL << shift) - 1; - page = pte_page(*ptep); + page = pte_page(pte); if (page) page += (address & mask) / PAGE_SIZE; +no_page: local_irq_restore(flags); return page; } diff --git a/arch/powerpc/mm/pgtable_64.c b/arch/powerpc/mm/pgtable_64.c index 59daa5e..6bfadf1 100644 --- a/arch/powerpc/mm/pgtable_64.c +++ b/arch/powerpc/mm/pgtable_64.c @@ -839,6 +839,17 @@ pmd_t pmdp_get_and_clear(struct mm_struct *mm, * hash fault look at them. */ memset(pgtable, 0, PTE_FRAG_SIZE); + /* + * Serialize against find_linux_pte_or_hugepte which does lock-less + * lookup in page tables with local interrupts disabled. For huge pages + * it casts pmd_t to pte_t. Since format of pte_t is different from + * pmd_t we want to prevent transit from pmd pointing to page table + * to pmd pointing to huge page (and back) while interrupts are disabled. + * We clear pmd to possibly replace it with page table pointer in + * different code paths. So make sure we wait for the parallel + * find_linux_pte_or_hugepage to finish. + */ + kick_all_cpus_sync(); return old_pmd; } |