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KVM: ARM: Introduce KVM_ARM_SET_DEVICE_ADDR ioctl

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On ARM some bits are specific to the model being emulated for the guest and
user space needs a way to tell the kernel about those bits.  An example is mmio
device base addresses, where KVM must know the base address for a given device
to properly emulate mmio accesses within a certain address range or directly
map a device with virtualiation extensions into the guest address space.

We make this API ARM-specific as we haven't yet reached a consensus for a
generic API for all KVM architectures that will allow us to do something like
this.

Reviewed-by: Will Deacon <will.deacon@arm.com>
Signed-off-by: Christoffer Dall <c.dall@virtualopensystems.com>
Signed-off-by: Marc Zyngier <marc.zyngier@arm.com>
This commit is contained in:
Christoffer Dall
2013-01-23 13:18:04 -05:00
committed by Marc Zyngier
parent a96ab03917
commit 3401d54696
4 changed files with 80 additions and 1 deletions
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13
arch/arm/include/uapi/asm/kvm.h
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@@ -65,6 +65,19 @@ struct kvm_regs {
#define KVM_ARM_TARGET_CORTEX_A15 0
#define KVM_ARM_NUM_TARGETS 1
/* KVM_ARM_SET_DEVICE_ADDR ioctl id encoding */
#define KVM_ARM_DEVICE_TYPE_SHIFT 0
#define KVM_ARM_DEVICE_TYPE_MASK (0xffff << KVM_ARM_DEVICE_TYPE_SHIFT)
#define KVM_ARM_DEVICE_ID_SHIFT 16
#define KVM_ARM_DEVICE_ID_MASK (0xffff << KVM_ARM_DEVICE_ID_SHIFT)
/* Supported device IDs */
#define KVM_ARM_DEVICE_VGIC_V2 0
/* Supported VGIC address types */
#define KVM_VGIC_V2_ADDR_TYPE_DIST 0
#define KVM_VGIC_V2_ADDR_TYPE_CPU 1
#define KVM_ARM_VCPU_POWER_OFF 0 /* CPU is started in OFF state */
struct kvm_vcpu_init {