From 4a6fee805d5e278e4733bf933cb5b184b7a8be1f Mon Sep 17 00:00:00 2001 From: Anup Patel Date: Mon, 30 Sep 2013 14:20:05 +0530 Subject: [PATCH] ARM: KVM: Implement kvm_vcpu_preferred_target() function This patch implements kvm_vcpu_preferred_target() function for KVM ARM which will help us implement KVM_ARM_PREFERRED_TARGET ioctl for user space. Signed-off-by: Anup Patel Signed-off-by: Pranavkumar Sawargaonkar Signed-off-by: Christoffer Dall --- arch/arm/include/asm/kvm_host.h | 1 + arch/arm/kvm/guest.c | 20 ++++++++++++++++++++ 2 files changed, 21 insertions(+) diff --git a/arch/arm/include/asm/kvm_host.h b/arch/arm/include/asm/kvm_host.h index 7d22517d8071..76f3c1978442 100644 --- a/arch/arm/include/asm/kvm_host.h +++ b/arch/arm/include/asm/kvm_host.h @@ -154,6 +154,7 @@ 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/arm/kvm/guest.c b/arch/arm/kvm/guest.c index 152d03612181..ec98209fda71 100644 --- a/arch/arm/kvm/guest.c +++ b/arch/arm/kvm/guest.c @@ -222,6 +222,26 @@ 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; -- 2.20.1