From nobody Mon Feb 9 19:54:15 2026 Delivered-To: importer@patchew.org Authentication-Results: mx.zohomail.com; spf=pass (zohomail.com: domain of gnu.org designates 209.51.188.17 as permitted sender) smtp.mailfrom=qemu-devel-bounces+importer=patchew.org@nongnu.org; dmarc=pass(p=none dis=none) header.from=nongnu.org ARC-Seal: i=1; a=rsa-sha256; t=1695991732; cv=none; d=zohomail.com; s=zohoarc; b=VcnS9sFl6dWmBhpr98wkR9P7Hpax7IJR23OKv19ruXRcvo9HANXWUKs+BdZ1Fle1SHRjWD62G+NcMai2CZgDhzEV0cN3LC62EtU82HYEwpAfbCWjxB0gibxOnpZWBaZ3KyIQOS0lWmIcO94LCWX6g+MCKKnECGcGrttQuD1DMpg= ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=zohomail.com; s=zohoarc; t=1695991732; h=Content-Type:Cc:Date:From:In-Reply-To:List-Subscribe:List-Post:List-Id:List-Archive:List-Help:List-Unsubscribe:MIME-Version:Message-ID:Reply-To:References:Sender:Subject:To; bh=qBZ+VJ4nD5t8FtSMNqtXM9UlIS+kq7AqXPDwpJl0Tk8=; b=L5/dEW7CSmDJ1AdsI8tUBqQX7Nao7cfw2Mawy1Wrwf9BTDEDoowW/eBJ1EbwwNze/z/xW9/4BAvKvfwQ62ej8cIG+J4dFT26Y1Vudh05iBaZxe/mGu+dnWN/9qumONO0Zt/89l9sHASYC6BkqDIP4QecPQQb1XSn1iPjdCNP9tE= ARC-Authentication-Results: i=1; mx.zohomail.com; spf=pass (zohomail.com: domain of gnu.org designates 209.51.188.17 as permitted sender) smtp.mailfrom=qemu-devel-bounces+importer=patchew.org@nongnu.org; dmarc=pass header.from= (p=none dis=none) Return-Path: Received: from lists.gnu.org (lists.gnu.org [209.51.188.17]) by mx.zohomail.com with SMTPS id 1695991732397136.0176298187822; Fri, 29 Sep 2023 05:48:52 -0700 (PDT) Received: from localhost ([::1] helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1qmCvB-0003JI-Im; Fri, 29 Sep 2023 08:48:41 -0400 Received: from eggs.gnu.org ([2001:470:142:3::10]) by lists.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1qmCuF-000305-O3; Fri, 29 Sep 2023 08:47:48 -0400 Received: from frasgout.his.huawei.com ([185.176.79.56]) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1qmCtz-0007Ku-E7; Fri, 29 Sep 2023 08:47:43 -0400 Received: from lhrpeml500001.china.huawei.com (unknown [172.18.147.201]) by frasgout.his.huawei.com (SkyGuard) with ESMTP id 4RxqpJ1yBxz67yyF; Fri, 29 Sep 2023 20:46:00 +0800 (CST) Received: from A190218597.china.huawei.com (10.48.156.153) by lhrpeml500001.china.huawei.com (7.191.163.213) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256) id 15.1.2507.31; Fri, 29 Sep 2023 13:47:05 +0100 To: , CC: , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , Subject: [PATCH 9/9] target/arm/kvm: Write CPU state back to KVM on reset Date: Fri, 29 Sep 2023 13:43:04 +0100 Message-ID: <20230929124304.13672-10-salil.mehta@huawei.com> X-Mailer: git-send-email 2.8.3 In-Reply-To: <20230929124304.13672-1-salil.mehta@huawei.com> References: <20230929124304.13672-1-salil.mehta@huawei.com> MIME-Version: 1.0 X-Originating-IP: [10.48.156.153] X-ClientProxiedBy: dggems701-chm.china.huawei.com (10.3.19.178) To lhrpeml500001.china.huawei.com (7.191.163.213) X-CFilter-Loop: Reflected Received-SPF: pass (zohomail.com: domain of gnu.org designates 209.51.188.17 as permitted sender) client-ip=209.51.188.17; envelope-from=qemu-devel-bounces+importer=patchew.org@nongnu.org; helo=lists.gnu.org; Received-SPF: pass client-ip=185.176.79.56; envelope-from=salil.mehta@huawei.com; helo=frasgout.his.huawei.com X-Spam_score_int: -18 X-Spam_score: -1.9 X-Spam_bar: - X-Spam_report: (-1.9 / 5.0 requ) BAYES_00=-1.9, SPF_HELO_NONE=0.001, T_SPF_TEMPERROR=0.01 autolearn=ham autolearn_force=no X-Spam_action: no action X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Reply-to: Salil Mehta From: Salil Mehta via Errors-To: qemu-devel-bounces+importer=patchew.org@nongnu.org Sender: qemu-devel-bounces+importer=patchew.org@nongnu.org X-ZM-MESSAGEID: 1695991732760100001 Content-Transfer-Encoding: quoted-printable Content-Type: text/plain; charset="utf-8" From: Jean-Philippe Brucker When a KVM vCPU is reset following a PSCI CPU_ON call, its power state is not synchronized with KVM at the moment. Because the vCPU is not marked dirty, we miss the call to kvm_arch_put_registers() that writes to KVM's MP_STATE. Force mp_state synchronization. Signed-off-by: Jean-Philippe Brucker Signed-off-by: Salil Mehta Reviewed-by: Alex Benn=C3=A9e --- target/arm/kvm.c | 8 +++++++- 1 file changed, 7 insertions(+), 1 deletion(-) diff --git a/target/arm/kvm.c b/target/arm/kvm.c index b66b936a95..8cb70b9e7c 100644 --- a/target/arm/kvm.c +++ b/target/arm/kvm.c @@ -642,11 +642,12 @@ void kvm_arm_cpu_post_load(ARMCPU *cpu) void kvm_arm_reset_vcpu(ARMCPU *cpu) { int ret; + CPUState *cs =3D CPU(cpu); =20 /* Re-init VCPU so that all registers are set to * their respective reset values. */ - ret =3D kvm_arm_vcpu_init(CPU(cpu)); + ret =3D kvm_arm_vcpu_init(cs); if (ret < 0) { fprintf(stderr, "kvm_arm_vcpu_init failed: %s\n", strerror(-ret)); abort(); @@ -663,6 +664,11 @@ void kvm_arm_reset_vcpu(ARMCPU *cpu) * for the same reason we do so in kvm_arch_get_registers(). */ write_list_to_cpustate(cpu); + /* + * Ensure we call kvm_arch_put_registers(). The vCPU isn't marked dirt= y if + * it was parked in KVM and is now booting from a PSCI CPU_ON call. + */ + cs->vcpu_dirty =3D true; } =20 /* --=20 2.34.1