Merge tag 'signed-for-4.0' of git://github.com/agraf/linux-2.6

Patch queue for 4.0 - 2015-03-25

A few bug fixes for Book3S HV KVM:

  - Fix spinlock ordering
  - Fix idle guests on LE hosts
  - Fix instruction emulation

2 files changed, 5 insertions, 4 deletions

diff --git a/arch/powerpc/kvm/book3s_hv.c b/arch/powerpc/kvm/book3s_hv.c
index de4018a1bc4b..de747563d29d 100644
--- a/arch/powerpc/kvm/book3s_hv.c
+++ b/arch/powerpc/kvm/book3s_hv.c
@@ -636,7 +636,7 @@ static int kvmppc_get_yield_count(struct kvm_vcpu *vcpu)
         spin_lock(&vcpu->arch.vpa_update_lock);
         lppaca = (struct lppaca *)vcpu->arch.vpa.pinned_addr;
         if (lppaca)
-                yield_count = lppaca->yield_count;
+                yield_count = be32_to_cpu(lppaca->yield_count);
         spin_unlock(&vcpu->arch.vpa_update_lock);
         return yield_count;
 }
@@ -942,20 +942,20 @@ static int kvm_arch_vcpu_ioctl_set_sregs_hv(struct kvm_vcpu *vcpu,
 static void kvmppc_set_lpcr(struct kvm_vcpu *vcpu, u64 new_lpcr,
                 bool preserve_top32)
 {
+        struct kvm *kvm = vcpu->kvm;
         struct kvmppc_vcore *vc = vcpu->arch.vcore;
         u64 mask;
 
+        mutex_lock(&kvm->lock);
         spin_lock(&vc->lock);
         /*
          * If ILE (interrupt little-endian) has changed, update the
          * MSR_LE bit in the intr_msr for each vcpu in this vcore.
          */
         if ((new_lpcr & LPCR_ILE) != (vc->lpcr & LPCR_ILE)) {
-                struct kvm *kvm = vcpu->kvm;
                 struct kvm_vcpu *vcpu;
                 int i;
 
-                mutex_lock(&kvm->lock);
                 kvm_for_each_vcpu(i, vcpu, kvm) {
                         if (vcpu->arch.vcore != vc)
                                 continue;
@@ -964,7 +964,6 @@ static void kvmppc_set_lpcr(struct kvm_vcpu *vcpu, u64 new_lpcr,
                         else
                                 vcpu->arch.intr_msr &= ~MSR_LE;
                 }
-                mutex_unlock(&kvm->lock);
         }
 
         /*
@@ -981,6 +980,7 @@ static void kvmppc_set_lpcr(struct kvm_vcpu *vcpu, u64 new_lpcr,
                 mask &= 0xFFFFFFFF;
         vc->lpcr = (vc->lpcr & ~mask) | (new_lpcr & mask);
         spin_unlock(&vc->lock);
+        mutex_unlock(&kvm->lock);
 }
 
 static int kvmppc_get_one_reg_hv(struct kvm_vcpu *vcpu, u64 id,
diff --git a/arch/powerpc/kvm/book3s_hv_rmhandlers.S b/arch/powerpc/kvm/book3s_hv_rmhandlers.S
index bb94e6f20c81..6cbf1630cb70 100644
--- a/arch/powerpc/kvm/book3s_hv_rmhandlers.S
+++ b/arch/powerpc/kvm/book3s_hv_rmhandlers.S
@@ -1005,6 +1005,7 @@ END_FTR_SECTION_IFSET(CPU_FTR_HAS_PPR)
         /* Save HEIR (HV emulation assist reg) in emul_inst
            if this is an HEI (HV emulation interrupt, e40) */
         li      r3,KVM_INST_FETCH_FAILED
+        stw     r3,VCPU_LAST_INST(r9)
         cmpwi   r12,BOOK3S_INTERRUPT_H_EMUL_ASSIST
         bne     11f
         mfspr   r3,SPRN_HEIR