On Tue, Jun 18, 2013 at 03:21:38PM +0200, Alexander Graf wrote:
Am 11.06.2013 um 06:51 schrieb Christoffer Dall christoffer.dall@linaro.org:
Support creating the ARM VGIC device through the KVM_CREATE_DEVICE ioctl, which can then later be leveraged to use the KVM_{GET/SET}_DEVICE_ATTR, which is useful both for setting addresses in a more generic API than the ARM-specific one and is useful for save/restore of VGIC state.
Adds KVM_CAP_DEVICE_CTRL to ARM capabilities.
Signed-off-by: Christoffer Dall christoffer.dall@linaro.org
Documentation/virtual/kvm/devices/arm-vgic.txt | 10 +++++++ arch/arm/include/uapi/asm/kvm.h | 8 ++++++ arch/arm/kvm/arm.c | 1 + include/linux/kvm_host.h | 1 + include/uapi/linux/kvm.h | 1 + virt/kvm/arm/vgic.c | 34 ++++++++++++++++++++++++ virt/kvm/kvm_main.c | 4 +++ 7 files changed, 59 insertions(+) create mode 100644 Documentation/virtual/kvm/devices/arm-vgic.txt
diff --git a/Documentation/virtual/kvm/devices/arm-vgic.txt b/Documentation/virtual/kvm/devices/arm-vgic.txt new file mode 100644 index 0000000..25fd2d9 --- /dev/null +++ b/Documentation/virtual/kvm/devices/arm-vgic.txt @@ -0,0 +1,10 @@ +MPIC interrupt controller
MPIC?
yes, ARM MPIC, haven't heard of it?
+=========================
+Device types supported:
- KVM_DEV_TYPE_ARM_VGIC ARM Generic Interrupt Controller v2.0
+Only one VGIC instance may be instantiated through either this API or the +legacy KVM_CREATE_IRQCHIP api. The created VGIC will act as the VM interrupt +controller, requiring emulated user-space devices to inject interrupts to the +VGIC instead of directly to CPUs. diff --git a/arch/arm/include/uapi/asm/kvm.h b/arch/arm/include/uapi/asm/kvm.h index c1ee007..587f1ae 100644 --- a/arch/arm/include/uapi/asm/kvm.h +++ b/arch/arm/include/uapi/asm/kvm.h @@ -142,6 +142,14 @@ struct kvm_arch_memory_slot { #define KVM_REG_ARM_VFP_FPINST 0x1009 #define KVM_REG_ARM_VFP_FPINST2 0x100A
+/* Device Control API: ARM VGIC */ +#define KVM_DEV_ARM_VGIC_GRP_ADDR 0 +#define KVM_DEV_ARM_VGIC_GRP_DIST_REGS 1 +#define KVM_DEV_ARM_VGIC_GRP_CPU_REGS 2 +#define KVM_DEV_ARM_VGIC_CPUID_SHIFT 32 +#define KVM_DEV_ARM_VGIC_CPUID_MASK (0xffULL << KVM_DEV_ARM_VGIC_CPUID_SHIFT) +#define KVM_DEV_ARM_VGIC_OFFSET_SHIFT 0 +#define KVM_DEV_ARM_VGIC_OFFSET_MASK (0xffffffffULL << KVM_DEV_ARM_VGIC_OFFSET_SHIFT)
Could you please describe the groups in the documentation too?
these defines can go in the other patch
/* KVM_IRQ_LINE irq field index values */ #define KVM_ARM_IRQ_TYPE_SHIFT 24 diff --git a/arch/arm/kvm/arm.c b/arch/arm/kvm/arm.c index 741f66a..b8e3b6e 100644 --- a/arch/arm/kvm/arm.c +++ b/arch/arm/kvm/arm.c @@ -187,6 +187,7 @@ int kvm_dev_ioctl_check_extension(long ext) case KVM_CAP_IRQCHIP: r = vgic_present; break;
- case KVM_CAP_DEVICE_CTRL: case KVM_CAP_USER_MEMORY: case KVM_CAP_SYNC_MMU: case KVM_CAP_DESTROY_MEMORY_REGION_WORKS:
diff --git a/include/linux/kvm_host.h b/include/linux/kvm_host.h index d9a3c30..e2d6556 100644 --- a/include/linux/kvm_host.h +++ b/include/linux/kvm_host.h @@ -1086,6 +1086,7 @@ struct kvm_device *kvm_device_from_filp(struct file *filp);
extern struct kvm_device_ops kvm_mpic_ops; extern struct kvm_device_ops kvm_xics_ops; +extern struct kvm_device_ops kvm_arm_vgic_ops;
#ifdef CONFIG_HAVE_KVM_CPU_RELAX_INTERCEPT
diff --git a/include/uapi/linux/kvm.h b/include/uapi/linux/kvm.h index a5c86fc..4f2a4ab 100644 --- a/include/uapi/linux/kvm.h +++ b/include/uapi/linux/kvm.h @@ -839,6 +839,7 @@ struct kvm_device_attr { #define KVM_DEV_TYPE_FSL_MPIC_20 1 #define KVM_DEV_TYPE_FSL_MPIC_42 2 #define KVM_DEV_TYPE_XICS 3 +#define KVM_DEV_TYPE_ARM_VGIC 4
Should this be versioned? Gicv2 is different from v3, no?
yes, we can call it all XXX_VGIC_V2. It just becomes so verbose, but it's really the right thing to do.
Alex
/*
- ioctls for VM fds
diff --git a/virt/kvm/arm/vgic.c b/virt/kvm/arm/vgic.c index 17c5ac7..b3dcd66 100644 --- a/virt/kvm/arm/vgic.c +++ b/virt/kvm/arm/vgic.c @@ -1497,3 +1497,37 @@ int kvm_vgic_set_addr(struct kvm *kvm, unsigned long type, u64 addr) mutex_unlock(&kvm->lock); return r; }
+static int vgic_set_attr(struct kvm_device *dev, struct kvm_device_attr *attr) +{
- return -ENXIO;
+}
+static int vgic_get_attr(struct kvm_device *dev, struct kvm_device_attr *attr) +{
- return -ENXIO;
+}
+static int vgic_has_attr(struct kvm_device *dev, struct kvm_device_attr *attr) +{
- return -ENXIO;
+}
+static void vgic_destroy(struct kvm_device *dev) +{
- kfree(dev);
+}
+static int vgic_create(struct kvm_device *dev, u32 type) +{
- return kvm_vgic_create(dev->kvm);
+}
+struct kvm_device_ops kvm_arm_vgic_ops = {
- .name = "kvm-arm-vgic",
- .create = vgic_create,
- .destroy = vgic_destroy,
- .set_attr = vgic_set_attr,
- .get_attr = vgic_get_attr,
- .has_attr = vgic_has_attr,
+}; diff --git a/virt/kvm/kvm_main.c b/virt/kvm/kvm_main.c index b547a1c..774e77c 100644 --- a/virt/kvm/kvm_main.c +++ b/virt/kvm/kvm_main.c @@ -2282,6 +2282,10 @@ static int kvm_ioctl_create_device(struct kvm *kvm, ops = &kvm_xics_ops; break; #endif +#ifdef CONFIG_KVM_ARM_VGIC
- case KVM_DEV_TYPE_ARM_VGIC:
ops = &kvm_arm_vgic_ops;+#endif default: return -ENODEV; } -- 1.7.9.5
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