diff options
Diffstat (limited to 'arch/powerpc/kvm')
| -rw-r--r-- | arch/powerpc/kvm/book3s_hv_rm_mmu.c | 28 |
1 files changed, 24 insertions, 4 deletions
diff --git a/arch/powerpc/kvm/book3s_hv_rm_mmu.c b/arch/powerpc/kvm/book3s_hv_rm_mmu.c index ff2da5ce475c..ed563a5f25c8 100644 --- a/arch/powerpc/kvm/book3s_hv_rm_mmu.c +++ b/arch/powerpc/kvm/book3s_hv_rm_mmu.c @@ -66,6 +66,17 @@ void kvmppc_add_revmap_chain(struct kvm *kvm, struct revmap_entry *rev, } EXPORT_SYMBOL_GPL(kvmppc_add_revmap_chain); +/* + * Note modification of an HPTE; set the HPTE modified bit + * if anyone is interested. + */ +static inline void note_hpte_modification(struct kvm *kvm, + struct revmap_entry *rev) +{ + if (atomic_read(&kvm->arch.hpte_mod_interest)) + rev->guest_rpte |= HPTE_GR_MODIFIED; +} + /* Remove this HPTE from the chain for a real page */ static void remove_revmap_chain(struct kvm *kvm, long pte_index, struct revmap_entry *rev, @@ -138,7 +149,7 @@ long kvmppc_do_h_enter(struct kvm *kvm, unsigned long flags, unsigned long slot_fn, hva; unsigned long *hpte; struct revmap_entry *rev; - unsigned long g_ptel = ptel; + unsigned long g_ptel; struct kvm_memory_slot *memslot; unsigned long *physp, pte_size; unsigned long is_io; @@ -153,6 +164,8 @@ long kvmppc_do_h_enter(struct kvm *kvm, unsigned long flags, return H_PARAMETER; writing = hpte_is_writable(ptel); pteh &= ~(HPTE_V_HVLOCK | HPTE_V_ABSENT | HPTE_V_VALID); + ptel &= ~HPTE_GR_RESERVED; + g_ptel = ptel; /* used later to detect if we might have been invalidated */ mmu_seq = kvm->mmu_notifier_seq; @@ -287,8 +300,10 @@ long kvmppc_do_h_enter(struct kvm *kvm, unsigned long flags, rev = &kvm->arch.revmap[pte_index]; if (realmode) rev = real_vmalloc_addr(rev); - if (rev) + if (rev) { rev->guest_rpte = g_ptel; + note_hpte_modification(kvm, rev); + } /* Link HPTE into reverse-map chain */ if (pteh & HPTE_V_VALID) { @@ -392,7 +407,8 @@ long kvmppc_h_remove(struct kvm_vcpu *vcpu, unsigned long flags, /* Read PTE low word after tlbie to get final R/C values */ remove_revmap_chain(kvm, pte_index, rev, v, hpte[1]); } - r = rev->guest_rpte; + r = rev->guest_rpte & ~HPTE_GR_RESERVED; + note_hpte_modification(kvm, rev); unlock_hpte(hpte, 0); vcpu->arch.gpr[4] = v; @@ -466,6 +482,7 @@ long kvmppc_h_bulk_remove(struct kvm_vcpu *vcpu) args[j] = ((0x80 | flags) << 56) + pte_index; rev = real_vmalloc_addr(&kvm->arch.revmap[pte_index]); + note_hpte_modification(kvm, rev); if (!(hp[0] & HPTE_V_VALID)) { /* insert R and C bits from PTE */ @@ -555,6 +572,7 @@ long kvmppc_h_protect(struct kvm_vcpu *vcpu, unsigned long flags, if (rev) { r = (rev->guest_rpte & ~mask) | bits; rev->guest_rpte = r; + note_hpte_modification(kvm, rev); } r = (hpte[1] & ~mask) | bits; @@ -606,8 +624,10 @@ long kvmppc_h_read(struct kvm_vcpu *vcpu, unsigned long flags, v &= ~HPTE_V_ABSENT; v |= HPTE_V_VALID; } - if (v & HPTE_V_VALID) + if (v & HPTE_V_VALID) { r = rev[i].guest_rpte | (r & (HPTE_R_R | HPTE_R_C)); + r &= ~HPTE_GR_RESERVED; + } vcpu->arch.gpr[4 + i * 2] = v; vcpu->arch.gpr[5 + i * 2] = r; } |