From: Nam Cao Date: Thu, 31 Oct 2024 15:14:17 +0000 (+0100) Subject: KVM: x86/xen: Initialize hrtimer in kvm_xen_init_vcpu() X-Git-Tag: v6.13-rc1~171^2~18 X-Git-Url: http://git.ipfire.org/?a=commitdiff_plain;h=f6e12766c52dc8e7032fe51d4ef33320b475775e;p=thirdparty%2Fkernel%2Flinux.git KVM: x86/xen: Initialize hrtimer in kvm_xen_init_vcpu() The hrtimer is initialized in the KVM_XEN_VCPU_SET_ATTR ioctl. That caused problem in the past, because the hrtimer can be initialized multiple times, which was fixed by commit af735db31285 ("KVM: x86/xen: Initialize Xen timer only once"). This commit avoids initializing the timer multiple times by checking the field 'function' of struct hrtimer to determine if it has already been initialized. This is not required and in the way to make the function field private. Move the hrtimer initialization into kvm_xen_init_vcpu() so that it will only be initialized once. Signed-off-by: Nam Cao Signed-off-by: Thomas Gleixner Acked-by: Sean Christopherson Link: https://lore.kernel.org/all/9c33c7224d97d08f4fa30d3cc8687981c1d3e953.1730386209.git.namcao@linutronix.de --- diff --git a/arch/x86/kvm/xen.c b/arch/x86/kvm/xen.c index 622fe24da9106..a909b817b9c0d 100644 --- a/arch/x86/kvm/xen.c +++ b/arch/x86/kvm/xen.c @@ -263,13 +263,6 @@ static void kvm_xen_stop_timer(struct kvm_vcpu *vcpu) atomic_set(&vcpu->arch.xen.timer_pending, 0); } -static void kvm_xen_init_timer(struct kvm_vcpu *vcpu) -{ - hrtimer_init(&vcpu->arch.xen.timer, CLOCK_MONOTONIC, - HRTIMER_MODE_ABS_HARD); - vcpu->arch.xen.timer.function = xen_timer_callback; -} - static void kvm_xen_update_runstate_guest(struct kvm_vcpu *v, bool atomic) { struct kvm_vcpu_xen *vx = &v->arch.xen; @@ -1070,9 +1063,6 @@ int kvm_xen_vcpu_set_attr(struct kvm_vcpu *vcpu, struct kvm_xen_vcpu_attr *data) break; } - if (!vcpu->arch.xen.timer.function) - kvm_xen_init_timer(vcpu); - /* Stop the timer (if it's running) before changing the vector */ kvm_xen_stop_timer(vcpu); vcpu->arch.xen.timer_virq = data->u.timer.port; @@ -2235,6 +2225,8 @@ void kvm_xen_init_vcpu(struct kvm_vcpu *vcpu) vcpu->arch.xen.poll_evtchn = 0; timer_setup(&vcpu->arch.xen.poll_timer, cancel_evtchn_poll, 0); + hrtimer_init(&vcpu->arch.xen.timer, CLOCK_MONOTONIC, HRTIMER_MODE_ABS_HARD); + vcpu->arch.xen.timer.function = xen_timer_callback; kvm_gpc_init(&vcpu->arch.xen.runstate_cache, vcpu->kvm); kvm_gpc_init(&vcpu->arch.xen.runstate2_cache, vcpu->kvm);