From nobody Mon Nov 25 04:35:24 2024 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=1718322467; cv=none; d=zohomail.com; s=zohoarc; b=P4PkplZj3EsZFEQ+NIQM0nq8Sf+z3kJR3mNFn0FLllGjtssBQP57pMH2Gac8FlUC68RiKpwjbXRGBRu2epTILbZea5FTBLiKTT+OU1XeZzT1TOLHVPvrfNhFcBlikhHPXdVU+wS27JYUo8JkgLc856h0BZMxXWedNU9h0xGBpHg= ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=zohomail.com; s=zohoarc; t=1718322467; h=Content-Type:Content-Transfer-Encoding:Cc:Cc:Date:Date:From:From:In-Reply-To:List-Subscribe:List-Post:List-Id:List-Archive:List-Help:List-Unsubscribe:MIME-Version:Message-ID:Reply-To:Reply-To:References:Sender:Subject:Subject:To:To:Message-Id; bh=iwEEX2SADeXqAFnprFupM3er8ptrR9grKukQeyzG7Ds=; b=g+ul8FMiOVS1qh4wKzAEqhsfDXDcrP63ZTc40y9qOXjxlwVpik8/Iotq+PFQBpsmpb36TXcxXPoulALy9fF6QyxAcdvhm4pOsDhlkvKnLcLOfad0wbpmHPsvX5Mci1bGnz3rIJltTDLap6IY3nhu6oRiOh8jq5J4Z2vezthRq7c= 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 1718322467650326.3851790340276; Thu, 13 Jun 2024 16:47:47 -0700 (PDT) Received: from localhost ([::1] helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1sHuAC-0006qG-Cg; Thu, 13 Jun 2024 19:47:28 -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 1sHuAA-0006kk-7s; Thu, 13 Jun 2024 19:47:26 -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 1sHuA8-0004nN-Cw; Thu, 13 Jun 2024 19:47:25 -0400 Received: from mail.maildlp.com (unknown [172.18.186.231]) by frasgout.his.huawei.com (SkyGuard) with ESMTP id 4W0f8t5WZ0z6H8xV; Fri, 14 Jun 2024 07:42:38 +0800 (CST) Received: from lhrpeml500001.china.huawei.com (unknown [7.191.163.213]) by mail.maildlp.com (Postfix) with ESMTPS id 1A470140AE5; Fri, 14 Jun 2024 07:47:21 +0800 (CST) Received: from 00293818-MRGF.china.huawei.com (10.195.245.24) by lhrpeml500001.china.huawei.com (7.191.163.213) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.1.2507.39; Fri, 14 Jun 2024 00:46:58 +0100 To: , , CC: , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , Subject: [PATCH RFC V3 25/29] target/arm/kvm: Write CPU state back to KVM on reset Date: Fri, 14 Jun 2024 00:36:35 +0100 Message-ID: <20240613233639.202896-26-salil.mehta@huawei.com> X-Mailer: git-send-email 2.34.1 In-Reply-To: <20240613233639.202896-1-salil.mehta@huawei.com> References: <20240613233639.202896-1-salil.mehta@huawei.com> MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable X-Originating-IP: [10.195.245.24] X-ClientProxiedBy: dggems703-chm.china.huawei.com (10.3.19.180) To lhrpeml500001.china.huawei.com (7.191.163.213) 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: -41 X-Spam_score: -4.2 X-Spam_bar: ---- X-Spam_report: (-4.2 / 5.0 requ) BAYES_00=-1.9, RCVD_IN_DNSWL_MED=-2.3, RCVD_IN_MSPIKE_H3=0.001, RCVD_IN_MSPIKE_WL=0.001, SPF_HELO_NONE=0.001, SPF_PASS=-0.001, T_SCC_BODY_TEXT_LINE=-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: 1718322468725100001 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 --- target/arm/kvm.c | 7 +++++++ 1 file changed, 7 insertions(+) diff --git a/target/arm/kvm.c b/target/arm/kvm.c index 1121771c4a..7acd83ce64 100644 --- a/target/arm/kvm.c +++ b/target/arm/kvm.c @@ -980,6 +980,7 @@ 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. @@ -1001,6 +1002,12 @@ 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 void kvm_arm_create_host_vcpu(ARMCPU *cpu) --=20 2.34.1