[PATCH 40/45] KVM: ARM: Move all vcpu init code into kvm_arch_vcpu_create()

Sean Christopherson
2019-10-22T01:59:20Z

Fold init() into create() now that the two are called back-to-back by
common KVM code (kvm_vcpu_init() calls kvm_arch_vcpu_init() as its last
action, and kvm_vm_ioctl_create_vcpu() calls kvm_arch_vcpu_create()
immediately thereafter). This paves the way for removing
kvm_arch_vcpu_{un}init() entirely.

Note, there is no associated unwinding in kvm_arch_vcpu_uninit() that
needs to be relocated (to kvm_arch_vcpu_destroy()).

No functional change intended.

Signed-off-by: Sean Christopherson <sean.j.christopherson@intel.com>
---
virt/kvm/arm/arm.c | 30 ++++++++++++++++++------------
1 file changed, 18 insertions(+), 12 deletions(-)

diff --git a/virt/kvm/arm/arm.c b/virt/kvm/arm/arm.c
index 1ab151d43fd7..aac4e5a1a521 100644
--- a/virt/kvm/arm/arm.c
+++ b/virt/kvm/arm/arm.c
@@ -266,6 +266,23 @@ int kvm_arch_vcpu_precreate(struct kvm *kvm, unsigned int id)

int kvm_arch_vcpu_create(struct kvm_vcpu *vcpu)
{
+ int err;
+
+ /* Force users to call KVM_ARM_VCPU_INIT */
+ vcpu->arch.target = -1;
+ bitmap_zero(vcpu->arch.features, KVM_VCPU_MAX_FEATURES);
+
+ /* Set up the timer */
+ kvm_timer_vcpu_init(vcpu);
+
+ kvm_pmu_vcpu_init(vcpu);
+
+ kvm_arm_reset_debug_ptr(vcpu);
+
+ err = kvm_vgic_vcpu_init(vcpu);
+ if (err)
+ return err;
+
return create_hyp_mappings(vcpu, vcpu + 1, PAGE_HYP);
}

@@ -311,18 +328,7 @@ void kvm_arch_vcpu_unblocking(struct kvm_vcpu *vcpu)

int kvm_arch_vcpu_init(struct kvm_vcpu *vcpu)
{
- /* Force users to call KVM_ARM_VCPU_INIT */
- vcpu->arch.target = -1;
- bitmap_zero(vcpu->arch.features, KVM_VCPU_MAX_FEATURES);
-
- /* Set up the timer */
- kvm_timer_vcpu_init(vcpu);
-
- kvm_pmu_vcpu_init(vcpu);
-
- kvm_arm_reset_debug_ptr(vcpu);
-
- return kvm_vgic_vcpu_init(vcpu);
+ return 0;
}

void kvm_arch_vcpu_load(struct kvm_vcpu *vcpu, int cpu)
--
2.22.0