Merge branch 'topic/ppc-kvm' into next

Merge our KVM topic branch.

1 files changed, 59 insertions, 14 deletions

diff --git a/arch/powerpc/kvm/book3s_hv.c b/arch/powerpc/kvm/book3s_hv.c
index 5ea107d830a6..e08fb3124dca 100644
--- a/arch/powerpc/kvm/book3s_hv.c
+++ b/arch/powerpc/kvm/book3s_hv.c
@@ -1327,6 +1327,12 @@ static int kvmppc_hcall_impl_hv(unsigned long cmd)
 	case H_CONFER:
 	case H_REGISTER_VPA:
 	case H_SET_MODE:
+#ifdef CONFIG_SPAPR_TCE_IOMMU
+	case H_GET_TCE:
+	case H_PUT_TCE:
+	case H_PUT_TCE_INDIRECT:
+	case H_STUFF_TCE:
+#endif
 	case H_LOGICAL_CI_LOAD:
 	case H_LOGICAL_CI_STORE:
 #ifdef CONFIG_KVM_XICS
@@ -2835,7 +2841,7 @@ static int kvmppc_core_vcpu_create_hv(struct kvm_vcpu *vcpu)
 	 * to trap and then we emulate them.
 	 */
 	vcpu->arch.hfscr = HFSCR_TAR | HFSCR_EBB | HFSCR_PM | HFSCR_BHRB |
-		HFSCR_DSCR | HFSCR_VECVSX | HFSCR_FP | HFSCR_PREFIX;
+		HFSCR_DSCR | HFSCR_VECVSX | HFSCR_FP;
 	if (cpu_has_feature(CPU_FTR_HVMODE)) {
 		vcpu->arch.hfscr &= mfspr(SPRN_HFSCR);
 #ifdef CONFIG_PPC_TRANSACTIONAL_MEM
@@ -3968,6 +3974,7 @@ static int kvmhv_vcpu_entry_p9_nested(struct kvm_vcpu *vcpu, u64 time_limit, uns
 
 	kvmhv_save_hv_regs(vcpu, &hvregs);
 	hvregs.lpcr = lpcr;
+	hvregs.amor = ~0;
 	vcpu->arch.regs.msr = vcpu->arch.shregs.msr;
 	hvregs.version = HV_GUEST_STATE_VERSION;
 	if (vcpu->arch.nested) {
@@ -4030,6 +4037,8 @@ static int kvmhv_vcpu_entry_p9_nested(struct kvm_vcpu *vcpu, u64 time_limit, uns
 static int kvmhv_p9_guest_entry(struct kvm_vcpu *vcpu, u64 time_limit,
 			 unsigned long lpcr, u64 *tb)
 {
+	struct kvm *kvm = vcpu->kvm;
+	struct kvm_nested_guest *nested = vcpu->arch.nested;
 	u64 next_timer;
 	int trap;
 
@@ -4049,34 +4058,61 @@ static int kvmhv_p9_guest_entry(struct kvm_vcpu *vcpu, u64 time_limit,
 		trap = kvmhv_vcpu_entry_p9_nested(vcpu, time_limit, lpcr, tb);
 
 		/* H_CEDE has to be handled now, not later */
-		if (trap == BOOK3S_INTERRUPT_SYSCALL && !vcpu->arch.nested &&
+		if (trap == BOOK3S_INTERRUPT_SYSCALL && !nested &&
 		    kvmppc_get_gpr(vcpu, 3) == H_CEDE) {
 			kvmppc_cede(vcpu);
 			kvmppc_set_gpr(vcpu, 3, 0);
 			trap = 0;
 		}
 
-	} else {
-		struct kvm *kvm = vcpu->kvm;
+	} else if (nested) {
+		__this_cpu_write(cpu_in_guest, kvm);
+		trap = kvmhv_vcpu_entry_p9(vcpu, time_limit, lpcr, tb);
+		__this_cpu_write(cpu_in_guest, NULL);
 
+	} else {
 		kvmppc_xive_push_vcpu(vcpu);
 
 		__this_cpu_write(cpu_in_guest, kvm);
 		trap = kvmhv_vcpu_entry_p9(vcpu, time_limit, lpcr, tb);
 		__this_cpu_write(cpu_in_guest, NULL);
 
-		if (trap == BOOK3S_INTERRUPT_SYSCALL && !vcpu->arch.nested &&
+		if (trap == BOOK3S_INTERRUPT_SYSCALL &&
 		    !(vcpu->arch.shregs.msr & MSR_PR)) {
 			unsigned long req = kvmppc_get_gpr(vcpu, 3);
 
-			/* H_CEDE has to be handled now, not later */
+			/*
+			 * XIVE rearm and XICS hcalls must be handled
+			 * before xive context is pulled (is this
+			 * true?)
+			 */
 			if (req == H_CEDE) {
+				/* H_CEDE has to be handled now */
 				kvmppc_cede(vcpu);
-				kvmppc_xive_rearm_escalation(vcpu); /* may un-cede */
+				if (!kvmppc_xive_rearm_escalation(vcpu)) {
+					/*
+					 * Pending escalation so abort
+					 * the cede.
+					 */
+					vcpu->arch.ceded = 0;
+				}
 				kvmppc_set_gpr(vcpu, 3, 0);
 				trap = 0;
 
-			/* XICS hcalls must be handled before xive is pulled */
+			} else if (req == H_ENTER_NESTED) {
+				/*
+				 * L2 should not run with the L1
+				 * context so rearm and pull it.
+				 */
+				if (!kvmppc_xive_rearm_escalation(vcpu)) {
+					/*
+					 * Pending escalation so abort
+					 * H_ENTER_NESTED.
+					 */
+					kvmppc_set_gpr(vcpu, 3, 0);
+					trap = 0;
+				}
+
 			} else if (hcall_is_xics(req)) {
 				int ret;
 
@@ -4234,13 +4270,13 @@ static void kvmppc_vcore_blocked(struct kvmppc_vcore *vc)
 	start_wait = ktime_get();
 
 	vc->vcore_state = VCORE_SLEEPING;
-	trace_kvmppc_vcore_blocked(vc, 0);
+	trace_kvmppc_vcore_blocked(vc->runner, 0);
 	spin_unlock(&vc->lock);
 	schedule();
 	finish_rcuwait(&vc->wait);
 	spin_lock(&vc->lock);
 	vc->vcore_state = VCORE_INACTIVE;
-	trace_kvmppc_vcore_blocked(vc, 1);
+	trace_kvmppc_vcore_blocked(vc->runner, 1);
 	++vc->runner->stat.halt_successful_wait;
 
 	cur = ktime_get();
@@ -4520,9 +4556,14 @@ int kvmhv_run_single_vcpu(struct kvm_vcpu *vcpu, u64 time_limit,
 
 	if (!nested) {
 		kvmppc_core_prepare_to_enter(vcpu);
-		if (test_bit(BOOK3S_IRQPRIO_EXTERNAL,
-			     &vcpu->arch.pending_exceptions))
+		if (vcpu->arch.shregs.msr & MSR_EE) {
+			if (xive_interrupt_pending(vcpu))
+				kvmppc_inject_interrupt_hv(vcpu,
+						BOOK3S_INTERRUPT_EXTERNAL, 0);
+		} else if (test_bit(BOOK3S_IRQPRIO_EXTERNAL,
+			     &vcpu->arch.pending_exceptions)) {
 			lpcr |= LPCR_MER;
+		}
 	} else if (vcpu->arch.pending_exceptions ||
 		   vcpu->arch.doorbell_request ||
 		   xive_interrupt_pending(vcpu)) {
@@ -4620,9 +4661,9 @@ int kvmhv_run_single_vcpu(struct kvm_vcpu *vcpu, u64 time_limit,
 			if (kvmppc_vcpu_check_block(vcpu))
 				break;
 
-			trace_kvmppc_vcore_blocked(vc, 0);
+			trace_kvmppc_vcore_blocked(vcpu, 0);
 			schedule();
-			trace_kvmppc_vcore_blocked(vc, 1);
+			trace_kvmppc_vcore_blocked(vcpu, 1);
 		}
 		finish_rcuwait(wait);
 	}
@@ -5284,6 +5325,10 @@ static int kvmppc_core_init_vm_hv(struct kvm *kvm)
 		kvm->arch.host_lpcr = lpcr = mfspr(SPRN_LPCR);
 		lpcr &= LPCR_PECE | LPCR_LPES;
 	} else {
+		/*
+		 * The L2 LPES mode will be set by the L0 according to whether
+		 * or not it needs to take external interrupts in HV mode.
+		 */
 		lpcr = 0;
 	}
 	lpcr |= (4UL << LPCR_DPFD_SH) | LPCR_HDICE |