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ARM/ARM64: KVM: Implement KVM_ARM_PREFERRED_TARGET ioctl

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For implementing CPU=host, we need a mechanism for querying
preferred VCPU target type on underlying Host.

This patch implements KVM_ARM_PREFERRED_TARGET vm ioctl which
returns struct kvm_vcpu_init instance containing information
about preferred VCPU target type and target specific features
available for it.

Signed-off-by: Anup Patel <anup.patel@linaro.org>
Signed-off-by: Pranavkumar Sawargaonkar <pranavkumar@linaro.org>
Signed-off-by: Christoffer Dall <christoffer.dall@linaro.org>
This commit is contained in:
Anup Patel
2013-09-30 14:20:07 +05:30
committed by Christoffer Dall
parent 473bdc0e65
commit 42c4e0c77a
2 changed files with 14 additions and 0 deletions
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13
arch/arm/kvm/arm.c
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@@ -797,6 +797,19 @@ long kvm_arch_vm_ioctl(struct file *filp,
return -EFAULT;
return kvm_vm_ioctl_set_device_addr(kvm, &dev_addr);
}
case KVM_ARM_PREFERRED_TARGET: {
int err;
struct kvm_vcpu_init init;
err = kvm_vcpu_preferred_target(&init);
if (err)
return err;
if (copy_to_user(argp, &init, sizeof(init)))
return -EFAULT;
return 0;
}
default:
return -EINVAL;
}