Linux-libre 4.3.2-gnu

6 files changed, 50 insertions, 36 deletions

diff --git a/arch/arm/kvm/Kconfig b/arch/arm/kvm/Kconfig
index bfb915d05..356970f3b 100644
--- a/arch/arm/kvm/Kconfig
+++ b/arch/arm/kvm/Kconfig
@@ -21,6 +21,7 @@ config KVM
 	depends on MMU && OF
 	select PREEMPT_NOTIFIERS
 	select ANON_INODES
+	select ARM_GIC
 	select HAVE_KVM_CPU_RELAX_INTERCEPT
 	select HAVE_KVM_ARCH_TLB_FLUSH_ALL
 	select KVM_MMIO
@@ -45,15 +46,4 @@ config KVM_ARM_HOST
 	---help---
 	  Provides host support for ARM processors.
 
-config KVM_ARM_MAX_VCPUS
-	int "Number maximum supported virtual CPUs per VM"
-	depends on KVM_ARM_HOST
-	default 4
-	help
-	  Static number of max supported virtual CPUs per VM.
-
-	  If you choose a high number, the vcpu structures will be quite
-	  large, so only choose a reasonable number that you expect to
-	  actually use.
-
 endif # VIRTUALIZATION
diff --git a/arch/arm/kvm/arm.c b/arch/arm/kvm/arm.c
index f9c341c5a..78b286994 100644
--- a/arch/arm/kvm/arm.c
+++ b/arch/arm/kvm/arm.c
@@ -125,6 +125,7 @@ int kvm_arch_init_vm(struct kvm *kvm, unsigned long type)
 	if (ret)
 		goto out_free_stage2_pgd;
 
+	kvm_vgic_early_init(kvm);
 	kvm_timer_init(kvm);
 
 	/* Mark the initial VMID generation invalid */
@@ -249,6 +250,7 @@ out:
 
 void kvm_arch_vcpu_postcreate(struct kvm_vcpu *vcpu)
 {
+	kvm_vgic_vcpu_early_init(vcpu);
 }
 
 void kvm_arch_vcpu_free(struct kvm_vcpu *vcpu)
@@ -278,6 +280,8 @@ int kvm_arch_vcpu_init(struct kvm_vcpu *vcpu)
 	/* Set up the timer */
 	kvm_timer_vcpu_init(vcpu);
 
+	kvm_arm_reset_debug_ptr(vcpu);
+
 	return 0;
 }
 
@@ -301,13 +305,6 @@ void kvm_arch_vcpu_put(struct kvm_vcpu *vcpu)
 	kvm_arm_set_running_vcpu(NULL);
 }
 
-int kvm_arch_vcpu_ioctl_set_guest_debug(struct kvm_vcpu *vcpu,
-					struct kvm_guest_debug *dbg)
-{
-	return -EINVAL;
-}
-
-
 int kvm_arch_vcpu_ioctl_get_mpstate(struct kvm_vcpu *vcpu,
 				    struct kvm_mp_state *mp_state)
 {
@@ -528,10 +525,20 @@ int kvm_arch_vcpu_ioctl_run(struct kvm_vcpu *vcpu, struct kvm_run *run)
 		if (vcpu->arch.pause)
 			vcpu_pause(vcpu);
 
-		kvm_vgic_flush_hwstate(vcpu);
+		/*
+		 * Disarming the background timer must be done in a
+		 * preemptible context, as this call may sleep.
+		 */
 		kvm_timer_flush_hwstate(vcpu);
 
+		/*
+		 * Preparing the interrupts to be injected also
+		 * involves poking the GIC, which must be done in a
+		 * non-preemptible context.
+		 */
 		preempt_disable();
+		kvm_vgic_flush_hwstate(vcpu);
+
 		local_irq_disable();
 
 		/*
@@ -544,12 +551,14 @@ int kvm_arch_vcpu_ioctl_run(struct kvm_vcpu *vcpu, struct kvm_run *run)
 
 		if (ret <= 0 || need_new_vmid_gen(vcpu->kvm)) {
 			local_irq_enable();
+			kvm_vgic_sync_hwstate(vcpu);
 			preempt_enable();
 			kvm_timer_sync_hwstate(vcpu);
-			kvm_vgic_sync_hwstate(vcpu);
 			continue;
 		}
 
+		kvm_arm_setup_debug(vcpu);
+
 		/**************************************************************
 		 * Enter the guest
 		 */
@@ -564,6 +573,8 @@ int kvm_arch_vcpu_ioctl_run(struct kvm_vcpu *vcpu, struct kvm_run *run)
 		 * Back from guest
 		 *************************************************************/
 
+		kvm_arm_clear_debug(vcpu);
+
 		/*
 		 * We may have taken a host interrupt in HYP mode (ie
 		 * while executing the guest). This interrupt is still
@@ -586,11 +597,12 @@ int kvm_arch_vcpu_ioctl_run(struct kvm_vcpu *vcpu, struct kvm_run *run)
 		 */
 		kvm_guest_exit();
 		trace_kvm_exit(kvm_vcpu_trap_get_class(vcpu), *vcpu_pc(vcpu));
-		preempt_enable();
 
+		kvm_vgic_sync_hwstate(vcpu);
+
+		preempt_enable();
 
 		kvm_timer_sync_hwstate(vcpu);
-		kvm_vgic_sync_hwstate(vcpu);
 
 		ret = handle_exit(vcpu, run, ret);
 	}
@@ -921,6 +933,8 @@ static void cpu_init_hyp_mode(void *dummy)
 	vector_ptr = (unsigned long)__kvm_hyp_vector;
 
 	__cpu_init_hyp_mode(boot_pgd_ptr, pgd_ptr, hyp_stack_ptr, vector_ptr);
+
+	kvm_arm_init_debug();
 }
 
 static int hyp_init_cpu_notify(struct notifier_block *self,
@@ -1066,7 +1080,7 @@ static int init_hyp_mode(void)
 	 */
 	err = kvm_timer_hyp_init();
 	if (err)
-		goto out_free_mappings;
+		goto out_free_context;
 
 #ifndef CONFIG_HOTPLUG_CPU
 	free_boot_hyp_pgd();
diff --git a/arch/arm/kvm/guest.c b/arch/arm/kvm/guest.c
index d503fbb78..96e935bbc 100644
--- a/arch/arm/kvm/guest.c
+++ b/arch/arm/kvm/guest.c
@@ -290,3 +290,9 @@ int kvm_arch_vcpu_ioctl_translate(struct kvm_vcpu *vcpu,
 {
 	return -EINVAL;
 }
+
+int kvm_arch_vcpu_ioctl_set_guest_debug(struct kvm_vcpu *vcpu,
+					struct kvm_guest_debug *dbg)
+{
+	return -EINVAL;
+}
diff --git a/arch/arm/kvm/interrupts.S b/arch/arm/kvm/interrupts.S
index 568494dbb..900ef6dd8 100644
--- a/arch/arm/kvm/interrupts.S
+++ b/arch/arm/kvm/interrupts.S
@@ -361,10 +361,6 @@ hyp_hvc:
 	@ Check syndrome register
 	mrc	p15, 4, r1, c5, c2, 0	@ HSR
 	lsr	r0, r1, #HSR_EC_SHIFT
-#ifdef CONFIG_VFPv3
-	cmp	r0, #HSR_EC_CP_0_13
-	beq	switch_to_guest_vfp
-#endif
 	cmp	r0, #HSR_EC_HVC
 	bne	guest_trap		@ Not HVC instr.
 
@@ -378,7 +374,10 @@ hyp_hvc:
 	cmp     r2, #0
 	bne	guest_trap		@ Guest called HVC
 
-host_switch_to_hyp:
+	/*
+	 * Getting here means host called HVC, we shift parameters and branch
+	 * to Hyp function.
+	 */
 	pop	{r0, r1, r2}
 
 	/* Check for __hyp_get_vectors */
@@ -409,6 +408,10 @@ guest_trap:
 
 	@ Check if we need the fault information
 	lsr	r1, r1, #HSR_EC_SHIFT
+#ifdef CONFIG_VFPv3
+	cmp	r1, #HSR_EC_CP_0_13
+	beq	switch_to_guest_vfp
+#endif
 	cmp	r1, #HSR_EC_IABT
 	mrceq	p15, 4, r2, c6, c0, 2	@ HIFAR
 	beq	2f
@@ -477,7 +480,6 @@ guest_trap:
  */
 #ifdef CONFIG_VFPv3
 switch_to_guest_vfp:
-	load_vcpu			@ Load VCPU pointer to r0
 	push	{r3-r7}
 
 	@ NEON/VFP used.  Turn on VFP access.
diff --git a/arch/arm/kvm/psci.c b/arch/arm/kvm/psci.c
index 4b94b5131..ad6f6424f 100644
--- a/arch/arm/kvm/psci.c
+++ b/arch/arm/kvm/psci.c
@@ -126,7 +126,7 @@ static unsigned long kvm_psci_vcpu_on(struct kvm_vcpu *source_vcpu)
 
 static unsigned long kvm_psci_vcpu_affinity_info(struct kvm_vcpu *vcpu)
 {
-	int i;
+	int i, matching_cpus = 0;
 	unsigned long mpidr;
 	unsigned long target_affinity;
 	unsigned long target_affinity_mask;
@@ -151,12 +151,16 @@ static unsigned long kvm_psci_vcpu_affinity_info(struct kvm_vcpu *vcpu)
 	 */
 	kvm_for_each_vcpu(i, tmp, kvm) {
 		mpidr = kvm_vcpu_get_mpidr_aff(tmp);
-		if (((mpidr & target_affinity_mask) == target_affinity) &&
-		    !tmp->arch.pause) {
-			return PSCI_0_2_AFFINITY_LEVEL_ON;
+		if ((mpidr & target_affinity_mask) == target_affinity) {
+			matching_cpus++;
+			if (!tmp->arch.pause)
+				return PSCI_0_2_AFFINITY_LEVEL_ON;
 		}
 	}
 
+	if (!matching_cpus)
+		return PSCI_RET_INVALID_PARAMS;
+
 	return PSCI_0_2_AFFINITY_LEVEL_OFF;
 }
 
diff --git a/arch/arm/kvm/reset.c b/arch/arm/kvm/reset.c
index f558c073c..eeb85858d 100644
--- a/arch/arm/kvm/reset.c
+++ b/arch/arm/kvm/reset.c
@@ -77,7 +77,5 @@ int kvm_reset_vcpu(struct kvm_vcpu *vcpu)
 	kvm_reset_coprocs(vcpu);
 
 	/* Reset arch_timer context */
-	kvm_timer_vcpu_reset(vcpu, cpu_vtimer_irq);
-
-	return 0;
+	return kvm_timer_vcpu_reset(vcpu, cpu_vtimer_irq);
 }