From nobody Tue Feb 10 07:41:27 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=fail(p=none dis=none) header.from=huawei.com ARC-Seal: i=1; a=rsa-sha256; t=1618210906; cv=none; d=zohomail.com; s=zohoarc; b=P+hn/n2mFvHrMf0G/GBN+1If4BiJ54q6EfzVLwZSihWPz9ytopByfBGNlo9RWMYrdTY7wF8twDyieaeTWJTpC8HUUucVVMxo8DHJU8CpXZEb8zFXDnbbMw6qe5INdxFDgLNGF1zv3fregp+wwnMu62djTWslMhwWCuS8flV9r+c= ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=zohomail.com; s=zohoarc; t=1618210906; h=Content-Type:Content-Transfer-Encoding:Cc:Date:From:In-Reply-To:List-Subscribe:List-Post:List-Id:List-Archive:List-Help:List-Unsubscribe:MIME-Version:Message-ID:References:Sender:Subject:To; bh=+B3k6PWs0P27GDI3UDYVN5vdJYmxWoK+P9Z/XDERr/A=; b=JfUw38YgX313kbzOYt4wz2HndC42F7d4+jWBVvAm6cv5IIXZnOFGQuHevD8CKDoNLEwF1r7jFTTRj+T/XQ0hNJOJPiLczy1RQyp1IhLDaBkRnGp/GfmZna8lGZHLX4DXI3ghjmbOTDuJthN+GEIe85R1y1gRmiA6riuHMbm1T/0= 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=fail header.from= (p=none dis=none) header.from= Return-Path: Received: from lists.gnu.org (lists.gnu.org [209.51.188.17]) by mx.zohomail.com with SMTPS id 1618210906161341.10929726919574; Mon, 12 Apr 2021 00:01:46 -0700 (PDT) Received: from localhost ([::1]:40866 helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1lVqZs-0000hj-Rf for importer@patchew.org; Mon, 12 Apr 2021 03:01:44 -0400 Received: from eggs.gnu.org ([2001:470:142:3::10]:40708) by lists.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1lVqSF-00084l-0z; Mon, 12 Apr 2021 02:53:51 -0400 Received: from szxga07-in.huawei.com ([45.249.212.35]:4616) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1lVqSD-0004d6-2I; Mon, 12 Apr 2021 02:53:50 -0400 Received: from DGGEMS412-HUB.china.huawei.com (unknown [172.30.72.59]) by szxga07-in.huawei.com (SkyGuard) with ESMTP id 4FJfXf6tj2z9yVS; Mon, 12 Apr 2021 14:51:30 +0800 (CST) Received: from huawei.com (10.174.186.236) by DGGEMS412-HUB.china.huawei.com (10.3.19.212) with Microsoft SMTP Server id 14.3.498.0; Mon, 12 Apr 2021 14:53:39 +0800 From: Yifei Jiang To: , Subject: [PATCH RFC v5 11/12] target/riscv: Implement virtual time adjusting with vm state changing Date: Mon, 12 Apr 2021 14:52:45 +0800 Message-ID: <20210412065246.1853-12-jiangyifei@huawei.com> X-Mailer: git-send-email 2.26.2.windows.1 In-Reply-To: <20210412065246.1853-1-jiangyifei@huawei.com> References: <20210412065246.1853-1-jiangyifei@huawei.com> MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable X-Originating-IP: [10.174.186.236] 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=45.249.212.35; envelope-from=jiangyifei@huawei.com; helo=szxga07-in.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_H4=-0.01, RCVD_IN_MSPIKE_WL=-0.01, SPF_HELO_NONE=0.001, SPF_PASS=-0.001 autolearn=ham autolearn_force=no X-Spam_action: no action X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.23 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: bin.meng@windriver.com, sagark@eecs.berkeley.edu, kvm@vger.kernel.org, libvir-list@redhat.com, kbastian@mail.uni-paderborn.de, anup.patel@wdc.com, yinyipeng1@huawei.com, Alistair.Francis@wdc.com, Yifei Jiang , kvm-riscv@lists.infradead.org, palmer@dabbelt.com, fanliang@huawei.com, wu.wubin@huawei.com, zhang.zhanghailiang@huawei.com Errors-To: qemu-devel-bounces+importer=patchew.org@nongnu.org Sender: "Qemu-devel" Content-Type: text/plain; charset="utf-8" We hope that virtual time adjusts with vm state changing. When a vm is stopped, guest virtual time should stop counting and kvm_timer should be stopped. When the vm is resumed, guest virtual time should continue to count and kvm_timer should be restored. Signed-off-by: Yifei Jiang Signed-off-by: Yipeng Yin --- target/riscv/kvm.c | 14 ++++++++++++++ 1 file changed, 14 insertions(+) diff --git a/target/riscv/kvm.c b/target/riscv/kvm.c index ec693795ce..50328c537e 100644 --- a/target/riscv/kvm.c +++ b/target/riscv/kvm.c @@ -40,6 +40,7 @@ #include "kvm_riscv.h" #include "sbi_ecall_interface.h" #include "chardev/char-fe.h" +#include "sysemu/runstate.h" =20 static __u64 kvm_riscv_reg_id(CPURISCVState *env, __u64 type, __u64 idx) { @@ -448,6 +449,17 @@ unsigned long kvm_arch_vcpu_id(CPUState *cpu) return cpu->cpu_index; } =20 +static void kvm_riscv_vm_state_change(void *opaque, int running, RunState = state) +{ + CPUState *cs =3D opaque; + + if (running) { + kvm_riscv_put_regs_timer(cs); + } else { + kvm_riscv_get_regs_timer(cs); + } +} + void kvm_arch_init_irq_routing(KVMState *s) { } @@ -460,6 +472,8 @@ int kvm_arch_init_vcpu(CPUState *cs) CPURISCVState *env =3D &cpu->env; __u64 id; =20 + qemu_add_vm_change_state_handler(kvm_riscv_vm_state_change, cs); + id =3D kvm_riscv_reg_id(env, KVM_REG_RISCV_CONFIG, KVM_REG_RISCV_CONFI= G_REG(isa)); ret =3D kvm_get_one_reg(cs, id, &isa); if (ret) { --=20 2.19.1