From nobody Mon Nov 25 02:26:07 2024 Received: from galois.linutronix.de (Galois.linutronix.de [193.142.43.55]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 88E111A255A; Thu, 31 Oct 2024 15:15:04 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=193.142.43.55 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1730387706; cv=none; b=kQ4WHN8d0SlVHT+rrfYPDw5hpO7CH7PdR2NycLzt7+vEWhh30qAlrIUT2LUpbyAGiPk0kTIQ85fTsAx3blB/plGQLqcgJH3Ga5CuCkNcDMdPADs1EKKkADTxE4FiUwnjK7QsoPdUj1KTX9lOlTW3lVVAVb1XrFbBd1EALALfQSc= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1730387706; c=relaxed/simple; bh=CACZtg7Ahs7t4V6bbE23m+iG9ROJhJ0ED5SHwYyp0Dw=; h=From:To:Cc:Subject:Date:Message-Id:In-Reply-To:References: MIME-Version; b=uUVSXlUCsVGsoOdM8Vsza/2JabhFzARIq+FL+YkQ+hwFZkDxeeIR4YuKyu717gcWnBQjMYMx2rp9QQLecODfv9Aar15B6mvf+EmQkRBNPUeObaM80VUa8VQV3+G//zyWsh5xxl1elVQten2H82JFEGGdkGBibOJArqF+pCmzX00= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=linutronix.de; spf=pass smtp.mailfrom=linutronix.de; dkim=pass (2048-bit key) header.d=linutronix.de header.i=@linutronix.de header.b=D8R3JnkO; dkim=permerror (0-bit key) header.d=linutronix.de header.i=@linutronix.de header.b=vSyDZ/mN; arc=none smtp.client-ip=193.142.43.55 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=linutronix.de Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=linutronix.de Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=linutronix.de header.i=@linutronix.de header.b="D8R3JnkO"; dkim=permerror (0-bit key) header.d=linutronix.de header.i=@linutronix.de header.b="vSyDZ/mN" From: Nam Cao DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linutronix.de; s=2020; t=1730387702; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references; bh=HdVqhgFUx4wGhiyBVzB1j0RExe8nGmkufQErz8orPxA=; b=D8R3JnkO+m2baGKosWMEPCCgHEh93eEj3i5YM9IrL8ArYpE8sw2m3aMJr+wEoCSXY8Sk0o cNAwkYpIWaFLG/Hq2XJiVUcS+2TwzoEBxaJdnGTgTdUNaZDYPxCUahyT1R1Q2ZLKgAtlkC RGS4x58PXmjWRlEO06mYDbfjn42Bl5gCV5yLqmk+XU+l7pzFjdQcD1DB4hvBdhkbxvKYVn VQIs9hdbp/4lysS0E9Lr73R3hrjyUE0TZ1qUF3uy/S4GxCdrvN8y8ONJx8mE8TcNJpaftx o+H+v+lYJ5bnvSf7068cGQ9ReuPpyPFB2jhD2I6tEYa4wi9D8UuYsg7tL5wujQ== DKIM-Signature: v=1; a=ed25519-sha256; c=relaxed/relaxed; d=linutronix.de; s=2020e; t=1730387702; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references; bh=HdVqhgFUx4wGhiyBVzB1j0RExe8nGmkufQErz8orPxA=; b=vSyDZ/mNZsHFwmAZ5X6uDDFZnl5blvdtESX/4yICVSJ/nHMJu3Ss4nFWwbP39h1ewJkXLG oKAz3ELATfAAFmAA== To: Anna-Maria Behnsen , Frederic Weisbecker , Thomas Gleixner , Andreas Hindborg , Alice Ryhl , Miguel Ojeda , Kees Cook , linux-kernel@vger.kernel.org Cc: Jani Nikula , intel-gfx@lists.freedesktop.org, Sean Christopherson , Paolo Bonzini , x86@kernel.org, Jakub Kicinski , Kalle Valo , Jens Axboe , Christian Brauner , Peter Zijlstra , John Stultz , Nam Cao , Oliver Hartkopp , kvm@vger.kernel.org Subject: [RESEND PATCH v2 03/19] KVM: x86/xen: Initialize hrtimer in kvm_xen_init_vcpu() Date: Thu, 31 Oct 2024 16:14:17 +0100 Message-Id: <9c33c7224d97d08f4fa30d3cc8687981c1d3e953.1730386209.git.namcao@linutronix.de> In-Reply-To: References: Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable Content-Type: text/plain; charset="utf-8" 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 Acked-by: Sean Christopherson Cc: Paolo Bonzini Cc: x86@kernel.org Cc: kvm@vger.kernel.org --- arch/x86/kvm/xen.c | 12 ++---------- 1 file changed, 2 insertions(+), 10 deletions(-) diff --git a/arch/x86/kvm/xen.c b/arch/x86/kvm/xen.c index 622fe24da910..a909b817b9c0 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); } =20 -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 =3D xen_timer_callback; -} - static void kvm_xen_update_runstate_guest(struct kvm_vcpu *v, bool atomic) { struct kvm_vcpu_xen *vx =3D &v->arch.xen; @@ -1070,9 +1063,6 @@ int kvm_xen_vcpu_set_attr(struct kvm_vcpu *vcpu, stru= ct kvm_xen_vcpu_attr *data) break; } =20 - 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 =3D data->u.timer.port; @@ -2235,6 +2225,8 @@ void kvm_xen_init_vcpu(struct kvm_vcpu *vcpu) vcpu->arch.xen.poll_evtchn =3D 0; =20 timer_setup(&vcpu->arch.xen.poll_timer, cancel_evtchn_poll, 0); + hrtimer_init(&vcpu->arch.xen.timer, CLOCK_MONOTONIC, HRTIMER_MODE_ABS_HAR= D); + vcpu->arch.xen.timer.function =3D xen_timer_callback; =20 kvm_gpc_init(&vcpu->arch.xen.runstate_cache, vcpu->kvm); kvm_gpc_init(&vcpu->arch.xen.runstate2_cache, vcpu->kvm); --=20 2.39.5