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authorAnup Patel <anup.patel@linaro.org>2013-09-30 10:50:07 +0200
committerChristoffer Dall <christoffer.dall@linaro.org>2013-10-02 20:29:48 +0200
commit42c4e0c77ac91505ab94284b14025e3a0865c0a5 (patch)
tree1d5002e27ad0fd99a54f2cd3084724ffa37c2e44 /arch
parentARM64: KVM: Implement kvm_vcpu_preferred_target() function (diff)
downloadlinux-42c4e0c77ac91505ab94284b14025e3a0865c0a5.tar.xz
linux-42c4e0c77ac91505ab94284b14025e3a0865c0a5.zip
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>
Diffstat (limited to 'arch')
-rw-r--r--arch/arm/kvm/arm.c13
1 files changed, 13 insertions, 0 deletions
diff --git a/arch/arm/kvm/arm.c b/arch/arm/kvm/arm.c
index 9c697db2787e..cc5adb9349ef 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;
}