diff options
author | José Pekkarinen <jose.pekkarinen@nokia.com> | 2015-10-19 08:35:30 +0300 |
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committer | José Pekkarinen <jose.pekkarinen@nokia.com> | 2015-10-19 08:35:30 +0300 |
commit | ec0a2ed6d8a5e555edef907895c041e285fdb495 (patch) | |
tree | a4c8d982f8ac820b1b60818df22ad3ccac2036d5 /kernel/arch/powerpc/kvm/book3s_hv_rm_mmu.c | |
parent | 342fa5dfa053559f47caad657132522496dcf1b3 (diff) |
These changes are a raw update to a vanilla kernel 4.1.10, with the
recently announced rt patch patch-4.1.10-rt10.patch. No further changes
needed.
Change-Id: I9a0cf084498133b10771e744b6da4b29dff706ba
Signed-off-by: José Pekkarinen <jose.pekkarinen@nokia.com>
Diffstat (limited to 'kernel/arch/powerpc/kvm/book3s_hv_rm_mmu.c')
-rw-r--r-- | kernel/arch/powerpc/kvm/book3s_hv_rm_mmu.c | 18 |
1 files changed, 12 insertions, 6 deletions
diff --git a/kernel/arch/powerpc/kvm/book3s_hv_rm_mmu.c b/kernel/arch/powerpc/kvm/book3s_hv_rm_mmu.c index b027a8973..c6d601cc9 100644 --- a/kernel/arch/powerpc/kvm/book3s_hv_rm_mmu.c +++ b/kernel/arch/powerpc/kvm/book3s_hv_rm_mmu.c @@ -421,14 +421,20 @@ long kvmppc_do_h_remove(struct kvm *kvm, unsigned long flags, rev = real_vmalloc_addr(&kvm->arch.revmap[pte_index]); v = pte & ~HPTE_V_HVLOCK; if (v & HPTE_V_VALID) { - u64 pte1; - - pte1 = be64_to_cpu(hpte[1]); hpte[0] &= ~cpu_to_be64(HPTE_V_VALID); - rb = compute_tlbie_rb(v, pte1, pte_index); + rb = compute_tlbie_rb(v, be64_to_cpu(hpte[1]), pte_index); do_tlbies(kvm, &rb, 1, global_invalidates(kvm, flags), true); - /* Read PTE low word after tlbie to get final R/C values */ - remove_revmap_chain(kvm, pte_index, rev, v, pte1); + /* + * The reference (R) and change (C) bits in a HPT + * entry can be set by hardware at any time up until + * the HPTE is invalidated and the TLB invalidation + * sequence has completed. This means that when + * removing a HPTE, we need to re-read the HPTE after + * the invalidation sequence has completed in order to + * obtain reliable values of R and C. + */ + remove_revmap_chain(kvm, pte_index, rev, v, + be64_to_cpu(hpte[1])); } r = rev->guest_rpte & ~HPTE_GR_RESERVED; note_hpte_modification(kvm, rev); |