summaryrefslogtreecommitdiffstats
path: root/arch/arm64
diff options
context:
space:
mode:
authorAnup Patel <anup.patel@linaro.org>2013-09-30 14:20:06 +0530
committerChristoffer Dall <christoffer.dall@linaro.org>2013-10-02 11:29:40 -0700
commit473bdc0e6565ebb22455657a40daa21b6b4ee16b (patch)
tree06284390516ff0ea5eb3296bc6bf0bf88e734940 /arch/arm64
parent4a6fee805d5e278e4733bf933cb5b184b7a8be1f (diff)
downloadblackbird-op-linux-473bdc0e6565ebb22455657a40daa21b6b4ee16b.tar.gz
blackbird-op-linux-473bdc0e6565ebb22455657a40daa21b6b4ee16b.zip
ARM64: KVM: Implement kvm_vcpu_preferred_target() function
This patch implements kvm_vcpu_preferred_target() function for KVM ARM64 which will help us implement KVM_ARM_PREFERRED_TARGET ioctl for user space. 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/arm64')
-rw-r--r--arch/arm64/include/asm/kvm_host.h1
-rw-r--r--arch/arm64/kvm/guest.c20
2 files changed, 21 insertions, 0 deletions
diff --git a/arch/arm64/include/asm/kvm_host.h b/arch/arm64/include/asm/kvm_host.h
index 0859a4ddd1e7..4cc8c7078f39 100644
--- a/arch/arm64/include/asm/kvm_host.h
+++ b/arch/arm64/include/asm/kvm_host.h
@@ -151,6 +151,7 @@ struct kvm_vcpu_stat {
struct kvm_vcpu_init;
int kvm_vcpu_set_target(struct kvm_vcpu *vcpu,
const struct kvm_vcpu_init *init);
+int kvm_vcpu_preferred_target(struct kvm_vcpu_init *init);
unsigned long kvm_arm_num_regs(struct kvm_vcpu *vcpu);
int kvm_arm_copy_reg_indices(struct kvm_vcpu *vcpu, u64 __user *indices);
struct kvm_one_reg;
diff --git a/arch/arm64/kvm/guest.c b/arch/arm64/kvm/guest.c
index 2c3ff67a8ecb..3f0731e53274 100644
--- a/arch/arm64/kvm/guest.c
+++ b/arch/arm64/kvm/guest.c
@@ -248,6 +248,26 @@ int kvm_vcpu_set_target(struct kvm_vcpu *vcpu,
return kvm_reset_vcpu(vcpu);
}
+int kvm_vcpu_preferred_target(struct kvm_vcpu_init *init)
+{
+ int target = kvm_target_cpu();
+
+ if (target < 0)
+ return -ENODEV;
+
+ memset(init, 0, sizeof(*init));
+
+ /*
+ * For now, we don't return any features.
+ * In future, we might use features to return target
+ * specific features available for the preferred
+ * target type.
+ */
+ init->target = (__u32)target;
+
+ return 0;
+}
+
int kvm_arch_vcpu_ioctl_get_fpu(struct kvm_vcpu *vcpu, struct kvm_fpu *fpu)
{
return -EINVAL;
OpenPOWER on IntegriCloud