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authorSean Christopherson <sean.j.christopherson@intel.com>2019-12-18 13:55:30 -0800
committerPaolo Bonzini <pbonzini@redhat.com>2020-01-27 19:59:34 +0100
commit8bd826d629d6ff4a4e647079db15d64d06346004 (patch)
tree106f9f3c7c2bba2d455a6791c6af98e823f860ef /virt
parent9941d224fb7c765bc20f3cb6c747786adc5cd002 (diff)
downloadlinux-8bd826d629d6ff4a4e647079db15d64d06346004.tar.bz2
KVM: Move vcpu->run page allocation out of kvm_vcpu_init()
Open code the allocation and freeing of the vcpu->run page in kvm_vm_ioctl_create_vcpu() and kvm_vcpu_destroy() respectively. Doing so allows kvm_vcpu_init() to be a pure init function and eliminates kvm_vcpu_uninit() entirely. Signed-off-by: Sean Christopherson <sean.j.christopherson@intel.com> Reviewed-by: Cornelia Huck <cohuck@redhat.com> Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Diffstat (limited to 'virt')
-rw-r--r--virt/kvm/kvm_main.c34
1 files changed, 13 insertions, 21 deletions
diff --git a/virt/kvm/kvm_main.c b/virt/kvm/kvm_main.c
index 483b6b8e70a1..d21cf86176f0 100644
--- a/virt/kvm/kvm_main.c
+++ b/virt/kvm/kvm_main.c
@@ -321,10 +321,8 @@ void kvm_reload_remote_mmus(struct kvm *kvm)
kvm_make_all_cpus_request(kvm, KVM_REQ_MMU_RELOAD);
}
-static int kvm_vcpu_init(struct kvm_vcpu *vcpu, struct kvm *kvm, unsigned id)
+static void kvm_vcpu_init(struct kvm_vcpu *vcpu, struct kvm *kvm, unsigned id)
{
- struct page *page;
-
mutex_init(&vcpu->mutex);
vcpu->cpu = -1;
vcpu->kvm = kvm;
@@ -336,23 +334,11 @@ static int kvm_vcpu_init(struct kvm_vcpu *vcpu, struct kvm *kvm, unsigned id)
vcpu->pre_pcpu = -1;
INIT_LIST_HEAD(&vcpu->blocked_vcpu_list);
- page = alloc_page(GFP_KERNEL | __GFP_ZERO);
- if (!page)
- return -ENOMEM;
- vcpu->run = page_address(page);
-
kvm_vcpu_set_in_spin_loop(vcpu, false);
kvm_vcpu_set_dy_eligible(vcpu, false);
vcpu->preempted = false;
vcpu->ready = false;
preempt_notifier_init(&vcpu->preempt_notifier, &kvm_preempt_ops);
-
- return 0;
-}
-
-static void kvm_vcpu_uninit(struct kvm_vcpu *vcpu)
-{
- free_page((unsigned long)vcpu->run);
}
void kvm_vcpu_destroy(struct kvm_vcpu *vcpu)
@@ -366,7 +352,7 @@ void kvm_vcpu_destroy(struct kvm_vcpu *vcpu)
*/
put_pid(rcu_dereference_protected(vcpu->pid, 1));
- kvm_vcpu_uninit(vcpu);
+ free_page((unsigned long)vcpu->run);
kmem_cache_free(kvm_vcpu_cache, vcpu);
}
EXPORT_SYMBOL_GPL(kvm_vcpu_destroy);
@@ -2711,6 +2697,7 @@ static int kvm_vm_ioctl_create_vcpu(struct kvm *kvm, u32 id)
{
int r;
struct kvm_vcpu *vcpu;
+ struct page *page;
if (id >= KVM_MAX_VCPU_ID)
return -EINVAL;
@@ -2734,13 +2721,18 @@ static int kvm_vm_ioctl_create_vcpu(struct kvm *kvm, u32 id)
goto vcpu_decrement;
}
- r = kvm_vcpu_init(vcpu, kvm, id);
- if (r)
+ page = alloc_page(GFP_KERNEL | __GFP_ZERO);
+ if (!page) {
+ r = -ENOMEM;
goto vcpu_free;
+ }
+ vcpu->run = page_address(page);
+
+ kvm_vcpu_init(vcpu, kvm, id);
r = kvm_arch_vcpu_create(vcpu);
if (r)
- goto vcpu_uninit;
+ goto vcpu_free_run_page;
kvm_create_vcpu_debugfs(vcpu);
@@ -2778,8 +2770,8 @@ unlock_vcpu_destroy:
mutex_unlock(&kvm->lock);
debugfs_remove_recursive(vcpu->debugfs_dentry);
kvm_arch_vcpu_destroy(vcpu);
-vcpu_uninit:
- kvm_vcpu_uninit(vcpu);
+vcpu_free_run_page:
+ free_page((unsigned long)vcpu->run);
vcpu_free:
kmem_cache_free(kvm_vcpu_cache, vcpu);
vcpu_decrement: