summaryrefslogtreecommitdiffstats
diff options
context:
space:
mode:
authorAnup Patel <anup.patel@linaro.org>2013-09-30 14:20:07 +0530
committerChristoffer Dall <christoffer.dall@linaro.org>2013-10-02 11:29:48 -0700
commit42c4e0c77ac91505ab94284b14025e3a0865c0a5 (patch)
tree1d5002e27ad0fd99a54f2cd3084724ffa37c2e44
parent473bdc0e6565ebb22455657a40daa21b6b4ee16b (diff)
downloadop-kernel-dev-42c4e0c77ac91505ab94284b14025e3a0865c0a5.zip
op-kernel-dev-42c4e0c77ac91505ab94284b14025e3a0865c0a5.tar.gz
ARM/ARM64: KVM: Implement KVM_ARM_PREFERRED_TARGET ioctl
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>
-rw-r--r--arch/arm/kvm/arm.c13
-rw-r--r--include/uapi/linux/kvm.h1
2 files changed, 14 insertions, 0 deletions
diff --git a/arch/arm/kvm/arm.c b/arch/arm/kvm/arm.c
index 9c697db..cc5adb9 100644
--- a/arch/arm/kvm/arm.c
+++ b/arch/arm/kvm/arm.c
@@ -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;
}
diff --git a/include/uapi/linux/kvm.h b/include/uapi/linux/kvm.h
index 99c2533..e32e776 100644
--- a/include/uapi/linux/kvm.h
+++ b/include/uapi/linux/kvm.h
@@ -1012,6 +1012,7 @@ struct kvm_s390_ucas_mapping {
/* VM is being stopped by host */
#define KVM_KVMCLOCK_CTRL _IO(KVMIO, 0xad)
#define KVM_ARM_VCPU_INIT _IOW(KVMIO, 0xae, struct kvm_vcpu_init)
+#define KVM_ARM_PREFERRED_TARGET _IOR(KVMIO, 0xaf, struct kvm_vcpu_init)
#define KVM_GET_REG_LIST _IOWR(KVMIO, 0xb0, struct kvm_reg_list)
#define KVM_DEV_ASSIGN_ENABLE_IOMMU (1 << 0)
OpenPOWER on IntegriCloud