Merge branch 'perf/core' into perf/uprobes

Merge in latest upstream (and the latest perf development tree),
to prepare for tooling changes, and also to pick up v3.4 MM
changes that the uprobes code needs to take care of.

Signed-off-by: Ingo Molnar <mingo@kernel.org>

1 files changed, 106 insertions, 44 deletions

diff --git a/arch/powerpc/kvm/booke.c b/arch/powerpc/kvm/booke.c
index bb6c988f010..ee9e1ee9c85 100644
--- a/arch/powerpc/kvm/booke.c
+++ b/arch/powerpc/kvm/booke.c
@@ -124,12 +124,6 @@ void kvmppc_set_msr(struct kvm_vcpu *vcpu, u32 new_msr)
 	vcpu->arch.shared->msr = new_msr;
 
 	kvmppc_mmu_msr_notify(vcpu, old_msr);
-
-	if (vcpu->arch.shared->msr & MSR_WE) {
-		kvm_vcpu_block(vcpu);
-		kvmppc_set_exit_type(vcpu, EMULATED_MTMSRWE_EXITS);
-	};
-
 	kvmppc_vcpu_sync_spe(vcpu);
 }
 
@@ -258,9 +252,11 @@ static int kvmppc_booke_irqprio_deliver(struct kvm_vcpu *vcpu,
 		allowed = vcpu->arch.shared->msr & MSR_ME;
 		msr_mask = 0;
 		break;
-	case BOOKE_IRQPRIO_EXTERNAL:
 	case BOOKE_IRQPRIO_DECREMENTER:
 	case BOOKE_IRQPRIO_FIT:
+		keep_irq = true;
+		/* fall through */
+	case BOOKE_IRQPRIO_EXTERNAL:
 		allowed = vcpu->arch.shared->msr & MSR_EE;
 		allowed = allowed && !crit;
 		msr_mask = MSR_CE|MSR_ME|MSR_DE;
@@ -276,7 +272,7 @@ static int kvmppc_booke_irqprio_deliver(struct kvm_vcpu *vcpu,
 		vcpu->arch.shared->srr1 = vcpu->arch.shared->msr;
 		vcpu->arch.pc = vcpu->arch.ivpr | vcpu->arch.ivor[priority];
 		if (update_esr == true)
-			vcpu->arch.esr = vcpu->arch.queued_esr;
+			vcpu->arch.shared->esr = vcpu->arch.queued_esr;
 		if (update_dear == true)
 			vcpu->arch.shared->dar = vcpu->arch.queued_dear;
 		kvmppc_set_msr(vcpu, vcpu->arch.shared->msr & msr_mask);
@@ -288,13 +284,26 @@ static int kvmppc_booke_irqprio_deliver(struct kvm_vcpu *vcpu,
 	return allowed;
 }
 
-/* Check pending exceptions and deliver one, if possible. */
-void kvmppc_core_deliver_interrupts(struct kvm_vcpu *vcpu)
+static void update_timer_ints(struct kvm_vcpu *vcpu)
+{
+	if ((vcpu->arch.tcr & TCR_DIE) && (vcpu->arch.tsr & TSR_DIS))
+		kvmppc_core_queue_dec(vcpu);
+	else
+		kvmppc_core_dequeue_dec(vcpu);
+}
+
+static void kvmppc_core_check_exceptions(struct kvm_vcpu *vcpu)
 {
 	unsigned long *pending = &vcpu->arch.pending_exceptions;
-	unsigned long old_pending = vcpu->arch.pending_exceptions;
 	unsigned int priority;
 
+	if (vcpu->requests) {
+		if (kvm_check_request(KVM_REQ_PENDING_TIMER, vcpu)) {
+			smp_mb();
+			update_timer_ints(vcpu);
+		}
+	}
+
 	priority = __ffs(*pending);
 	while (priority <= BOOKE_IRQPRIO_MAX) {
 		if (kvmppc_booke_irqprio_deliver(vcpu, priority))
@@ -306,10 +315,24 @@ void kvmppc_core_deliver_interrupts(struct kvm_vcpu *vcpu)
 	}
 
 	/* Tell the guest about our interrupt status */
-	if (*pending)
-		vcpu->arch.shared->int_pending = 1;
-	else if (old_pending)
-		vcpu->arch.shared->int_pending = 0;
+	vcpu->arch.shared->int_pending = !!*pending;
+}
+
+/* Check pending exceptions and deliver one, if possible. */
+void kvmppc_core_prepare_to_enter(struct kvm_vcpu *vcpu)
+{
+	WARN_ON_ONCE(!irqs_disabled());
+
+	kvmppc_core_check_exceptions(vcpu);
+
+	if (vcpu->arch.shared->msr & MSR_WE) {
+		local_irq_enable();
+		kvm_vcpu_block(vcpu);
+		local_irq_disable();
+
+		kvmppc_set_exit_type(vcpu, EMULATED_MTMSRWE_EXITS);
+		kvmppc_core_check_exceptions(vcpu);
+	};
 }
 
 int kvmppc_vcpu_run(struct kvm_run *kvm_run, struct kvm_vcpu *vcpu)
@@ -322,11 +345,21 @@ int kvmppc_vcpu_run(struct kvm_run *kvm_run, struct kvm_vcpu *vcpu)
 	}
 
 	local_irq_disable();
+
+	kvmppc_core_prepare_to_enter(vcpu);
+
+	if (signal_pending(current)) {
+		kvm_run->exit_reason = KVM_EXIT_INTR;
+		ret = -EINTR;
+		goto out;
+	}
+
 	kvm_guest_enter();
 	ret = __kvmppc_vcpu_run(kvm_run, vcpu);
 	kvm_guest_exit();
-	local_irq_enable();
 
+out:
+	local_irq_enable();
 	return ret;
 }
 
@@ -603,7 +636,7 @@ int kvmppc_handle_exit(struct kvm_run *run, struct kvm_vcpu *vcpu,
 
 	local_irq_disable();
 
-	kvmppc_core_deliver_interrupts(vcpu);
+	kvmppc_core_prepare_to_enter(vcpu);
 
 	if (!(r & RESUME_HOST)) {
 		/* To avoid clobbering exit_reason, only check for signals if
@@ -628,6 +661,7 @@ int kvm_arch_vcpu_setup(struct kvm_vcpu *vcpu)
 	vcpu->arch.pc = 0;
 	vcpu->arch.shared->msr = 0;
 	vcpu->arch.shadow_msr = MSR_USER | MSR_DE | MSR_IS | MSR_DS;
+	vcpu->arch.shared->pir = vcpu->vcpu_id;
 	kvmppc_set_gpr(vcpu, 1, (16<<20) - 8); /* -8 for the callee-save LR slot */
 
 	vcpu->arch.shadow_pid = 1;
@@ -662,10 +696,10 @@ int kvm_arch_vcpu_ioctl_get_regs(struct kvm_vcpu *vcpu, struct kvm_regs *regs)
 	regs->sprg1 = vcpu->arch.shared->sprg1;
 	regs->sprg2 = vcpu->arch.shared->sprg2;
 	regs->sprg3 = vcpu->arch.shared->sprg3;
-	regs->sprg4 = vcpu->arch.sprg4;
-	regs->sprg5 = vcpu->arch.sprg5;
-	regs->sprg6 = vcpu->arch.sprg6;
-	regs->sprg7 = vcpu->arch.sprg7;
+	regs->sprg4 = vcpu->arch.shared->sprg4;
+	regs->sprg5 = vcpu->arch.shared->sprg5;
+	regs->sprg6 = vcpu->arch.shared->sprg6;
+	regs->sprg7 = vcpu->arch.shared->sprg7;
 
 	for (i = 0; i < ARRAY_SIZE(regs->gpr); i++)
 		regs->gpr[i] = kvmppc_get_gpr(vcpu, i);
@@ -690,10 +724,10 @@ int kvm_arch_vcpu_ioctl_set_regs(struct kvm_vcpu *vcpu, struct kvm_regs *regs)
 	vcpu->arch.shared->sprg1 = regs->sprg1;
 	vcpu->arch.shared->sprg2 = regs->sprg2;
 	vcpu->arch.shared->sprg3 = regs->sprg3;
-	vcpu->arch.sprg4 = regs->sprg4;
-	vcpu->arch.sprg5 = regs->sprg5;
-	vcpu->arch.sprg6 = regs->sprg6;
-	vcpu->arch.sprg7 = regs->sprg7;
+	vcpu->arch.shared->sprg4 = regs->sprg4;
+	vcpu->arch.shared->sprg5 = regs->sprg5;
+	vcpu->arch.shared->sprg6 = regs->sprg6;
+	vcpu->arch.shared->sprg7 = regs->sprg7;
 
 	for (i = 0; i < ARRAY_SIZE(regs->gpr); i++)
 		kvmppc_set_gpr(vcpu, i, regs->gpr[i]);
@@ -711,7 +745,7 @@ static void get_sregs_base(struct kvm_vcpu *vcpu,
 	sregs->u.e.csrr0 = vcpu->arch.csrr0;
 	sregs->u.e.csrr1 = vcpu->arch.csrr1;
 	sregs->u.e.mcsr = vcpu->arch.mcsr;
-	sregs->u.e.esr = vcpu->arch.esr;
+	sregs->u.e.esr = vcpu->arch.shared->esr;
 	sregs->u.e.dear = vcpu->arch.shared->dar;
 	sregs->u.e.tsr = vcpu->arch.tsr;
 	sregs->u.e.tcr = vcpu->arch.tcr;
@@ -729,28 +763,19 @@ static int set_sregs_base(struct kvm_vcpu *vcpu,
 	vcpu->arch.csrr0 = sregs->u.e.csrr0;
 	vcpu->arch.csrr1 = sregs->u.e.csrr1;
 	vcpu->arch.mcsr = sregs->u.e.mcsr;
-	vcpu->arch.esr = sregs->u.e.esr;
+	vcpu->arch.shared->esr = sregs->u.e.esr;
 	vcpu->arch.shared->dar = sregs->u.e.dear;
 	vcpu->arch.vrsave = sregs->u.e.vrsave;
-	vcpu->arch.tcr = sregs->u.e.tcr;
+	kvmppc_set_tcr(vcpu, sregs->u.e.tcr);
 
-	if (sregs->u.e.update_special & KVM_SREGS_E_UPDATE_DEC)
+	if (sregs->u.e.update_special & KVM_SREGS_E_UPDATE_DEC) {
 		vcpu->arch.dec = sregs->u.e.dec;
-
-	kvmppc_emulate_dec(vcpu);
+		kvmppc_emulate_dec(vcpu);
+	}
 
 	if (sregs->u.e.update_special & KVM_SREGS_E_UPDATE_TSR) {
-		/*
-		 * FIXME: existing KVM timer handling is incomplete.
-		 * TSR cannot be read by the guest, and its value in
-		 * vcpu->arch is always zero.  For now, just handle
-		 * the case where the caller is trying to inject a
-		 * decrementer interrupt.
-		 */
-
-		if ((sregs->u.e.tsr & TSR_DIS) &&
-		    (vcpu->arch.tcr & TCR_DIE))
-			kvmppc_core_queue_dec(vcpu);
+		vcpu->arch.tsr = sregs->u.e.tsr;
+		update_timer_ints(vcpu);
 	}
 
 	return 0;
@@ -761,7 +786,7 @@ static void get_sregs_arch206(struct kvm_vcpu *vcpu,
 {
 	sregs->u.e.features |= KVM_SREGS_E_ARCH206;
 
-	sregs->u.e.pir = 0;
+	sregs->u.e.pir = vcpu->vcpu_id;
 	sregs->u.e.mcsrr0 = vcpu->arch.mcsrr0;
 	sregs->u.e.mcsrr1 = vcpu->arch.mcsrr1;
 	sregs->u.e.decar = vcpu->arch.decar;
@@ -774,7 +799,7 @@ static int set_sregs_arch206(struct kvm_vcpu *vcpu,
 	if (!(sregs->u.e.features & KVM_SREGS_E_ARCH206))
 		return 0;
 
-	if (sregs->u.e.pir != 0)
+	if (sregs->u.e.pir != vcpu->vcpu_id)
 		return -EINVAL;
 
 	vcpu->arch.mcsrr0 = sregs->u.e.mcsrr0;
@@ -862,6 +887,16 @@ int kvm_arch_vcpu_ioctl_set_sregs(struct kvm_vcpu *vcpu,
 	return kvmppc_core_set_sregs(vcpu, sregs);
 }
 
+int kvm_vcpu_ioctl_get_one_reg(struct kvm_vcpu *vcpu, struct kvm_one_reg *reg)
+{
+	return -EINVAL;
+}
+
+int kvm_vcpu_ioctl_set_one_reg(struct kvm_vcpu *vcpu, struct kvm_one_reg *reg)
+{
+	return -EINVAL;
+}
+
 int kvm_arch_vcpu_ioctl_get_fpu(struct kvm_vcpu *vcpu, struct kvm_fpu *fpu)
 {
 	return -ENOTSUPP;
@@ -906,6 +941,33 @@ void kvmppc_core_destroy_vm(struct kvm *kvm)
 {
 }
 
+void kvmppc_set_tcr(struct kvm_vcpu *vcpu, u32 new_tcr)
+{
+	vcpu->arch.tcr = new_tcr;
+	update_timer_ints(vcpu);
+}
+
+void kvmppc_set_tsr_bits(struct kvm_vcpu *vcpu, u32 tsr_bits)
+{
+	set_bits(tsr_bits, &vcpu->arch.tsr);
+	smp_wmb();
+	kvm_make_request(KVM_REQ_PENDING_TIMER, vcpu);
+	kvm_vcpu_kick(vcpu);
+}
+
+void kvmppc_clr_tsr_bits(struct kvm_vcpu *vcpu, u32 tsr_bits)
+{
+	clear_bits(tsr_bits, &vcpu->arch.tsr);
+	update_timer_ints(vcpu);
+}
+
+void kvmppc_decrementer_func(unsigned long data)
+{
+	struct kvm_vcpu *vcpu = (struct kvm_vcpu *)data;
+
+	kvmppc_set_tsr_bits(vcpu, TSR_DIS);
+}
+
 int __init kvmppc_booke_init(void)
 {
 	unsigned long ivor[16];