In order to control the GICv4 view of virtual CPUs, we rely
on an irqdomain allocated for that purpose. Let's add a couple
of helpers to that effect.
At the same time, the vgic data structures gain new fields to
track all this... erm... wonderful stuff.
Signed-off-by: Marc Zyngier <marc.zyngier@xxxxxxx>
---
arch/arm/kvm/Makefile | 1 +
arch/arm64/kvm/Makefile | 1 +
include/kvm/arm_vgic.h | 11 +++++++++
virt/kvm/arm/vgic/vgic-v4.c | 59 +++++++++++++++++++++++++++++++++++++++++++++
virt/kvm/arm/vgic/vgic.h | 3 +++
5 files changed, 75 insertions(+)
create mode 100644 virt/kvm/arm/vgic/vgic-v4.c
diff --git a/arch/arm/kvm/Makefile b/arch/arm/kvm/Makefile
index d9beee652d36..0a1dd2cdb928 100644
--- a/arch/arm/kvm/Makefile
+++ b/arch/arm/kvm/Makefile
@@ -31,6 +31,7 @@ obj-y += $(KVM)/arm/vgic/vgic-init.o
obj-y += $(KVM)/arm/vgic/vgic-irqfd.o
obj-y += $(KVM)/arm/vgic/vgic-v2.o
obj-y += $(KVM)/arm/vgic/vgic-v3.o
+obj-y += $(KVM)/arm/vgic/vgic-v4.o
obj-y += $(KVM)/arm/vgic/vgic-mmio.o
obj-y += $(KVM)/arm/vgic/vgic-mmio-v2.o
obj-y += $(KVM)/arm/vgic/vgic-mmio-v3.o
diff --git a/arch/arm64/kvm/Makefile b/arch/arm64/kvm/Makefile
index 5d9810086c25..c30fd388ef80 100644
--- a/arch/arm64/kvm/Makefile
+++ b/arch/arm64/kvm/Makefile
@@ -26,6 +26,7 @@ kvm-$(CONFIG_KVM_ARM_HOST) += $(KVM)/arm/vgic/vgic-init.o
kvm-$(CONFIG_KVM_ARM_HOST) += $(KVM)/arm/vgic/vgic-irqfd.o
kvm-$(CONFIG_KVM_ARM_HOST) += $(KVM)/arm/vgic/vgic-v2.o
kvm-$(CONFIG_KVM_ARM_HOST) += $(KVM)/arm/vgic/vgic-v3.o
+kvm-$(CONFIG_KVM_ARM_HOST) += $(KVM)/arm/vgic/vgic-v4.o
kvm-$(CONFIG_KVM_ARM_HOST) += $(KVM)/arm/vgic/vgic-mmio.o
kvm-$(CONFIG_KVM_ARM_HOST) += $(KVM)/arm/vgic/vgic-mmio-v2.o
kvm-$(CONFIG_KVM_ARM_HOST) += $(KVM)/arm/vgic/vgic-mmio-v3.o
diff --git a/include/kvm/arm_vgic.h b/include/kvm/arm_vgic.h
index ee8587c8c715..359eeffe9857 100644
--- a/include/kvm/arm_vgic.h
+++ b/include/kvm/arm_vgic.h
@@ -26,6 +26,8 @@
#include <linux/list.h>
#include <linux/jump_label.h>
+#include <linux/irqchip/arm-gic-v4.h>
+
#define VGIC_V3_MAX_CPUS 255
#define VGIC_V2_MAX_CPUS 8
#define VGIC_NR_IRQS_LEGACY 256
@@ -73,6 +75,9 @@ struct vgic_global {
/* Only needed for the legacy KVM_CREATE_IRQCHIP */
bool can_emulate_gicv2;
+ /* Does have GICv4? */
+ bool has_gicv4;
+
/* GIC system register CPU interface */
struct static_key_false gicv3_cpuif;
@@ -233,6 +238,9 @@ struct vgic_dist {
/* used by vgic-debug */
struct vgic_state_iter *iter;
+
+ /* GICv4 ITS per-VM stuff */
+ struct its_vm its_vm;
};
struct vgic_v2_cpu_if {
@@ -251,6 +259,9 @@ struct vgic_v3_cpu_if {
u32 vgic_ap0r[4];
u32 vgic_ap1r[4];
u64 vgic_lr[VGIC_V3_MAX_LRS];
+
+ /* GICv4 vPE info */
+ struct its_vpe its_vpe;
};
struct vgic_cpu {
diff --git a/virt/kvm/arm/vgic/vgic-v4.c b/virt/kvm/arm/vgic/vgic-v4.c
new file mode 100644
index 000000000000..81f607f2f83b
--- /dev/null
+++ b/virt/kvm/arm/vgic/vgic-v4.c
@@ -0,0 +1,59 @@
+/*
+ * Copyright (C) 2017 ARM Ltd.
+ * Author: Marc Zyngier <marc.zyngier@xxxxxxx>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program. If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#include <linux/interrupt.h>
+#include <linux/irqdomain.h>
+#include <linux/kvm_host.h>
+
+#include "vgic.h"
+
+int vgic_v4_init(struct kvm *kvm)
+{
+ struct vgic_dist *dist = &kvm->arch.vgic;
+ struct kvm_vcpu *vcpu;
+ int i, nr_vcpus, ret;
+
+ nr_vcpus = atomic_read(&kvm->online_vcpus);
+
+ dist->its_vm.vpes = kzalloc(sizeof(*dist->its_vm.vpes) * nr_vcpus,
+ GFP_KERNEL);
+ if (!dist->its_vm.vpes)
+ return -ENOMEM;
+
+ dist->its_vm.nr_vpes = nr_vcpus;
+
+ kvm_for_each_vcpu(i, vcpu, kvm)
+ dist->its_vm.vpes[i] = &vcpu->arch.vgic_cpu.vgic_v3.its_vpe;
+
+ ret = its_alloc_vcpu_irqs(&dist->its_vm);
+ if (ret < 0) {
+ kvm_err("VPE IRQ allocation failure\n");
+ dist->its_vm.nr_vpes = 0;
+ kfree(dist->its_vm.vpes);
+ return ret;
+ }
+
+ return ret;
+}
+
+void vgic_v4_teardown(struct kvm *kvm)
+{
+ struct its_vm *its_vm = &kvm->arch.vgic.its_vm;
+
+ its_free_vcpu_irqs(its_vm);
+ kfree(its_vm->vpes);
+}
diff --git a/virt/kvm/arm/vgic/vgic.h b/virt/kvm/arm/vgic/vgic.h
index 3002b72d938b..4dc47edce672 100644
--- a/virt/kvm/arm/vgic/vgic.h
+++ b/virt/kvm/arm/vgic/vgic.h
@@ -229,4 +229,7 @@ int vgic_its_resolve_lpi(struct kvm *kvm, struct vgic_its *its,
u32 devid, u32 eventid, struct vgic_irq **irq);
struct vgic_its *vgic_msi_to_its(struct kvm *kvm, struct kvm_msi *msi);
+int vgic_v4_init(struct kvm *kvm);
+void vgic_v4_teardown(struct kvm *kvm);
+
#endif
--
2.11.0
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