From nobody Tue Feb 10 04:13:45 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 ARC-Seal: i=1; a=rsa-sha256; t=1606999893; cv=none; d=zohomail.com; s=zohoarc; b=aI4eWsVy7EFBnyM7oesbI5LWBnKcwMuCHZHIZRl2eefFt+0j3k4g7xu/V6k0pXejkqbrVH4nfUACwcAnL9jOZtXu0U5VCfreGP/yamgOYjnd+WB5Q8OIOC79bPp9rE5tHOkdAzBc8Jn0GU5AfqmVKy5EeBBeOSwWwCD79S4YD/w= ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=zohomail.com; s=zohoarc; t=1606999893; 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=iPR/FmF2h8l68rnZhMwcO9U5OctIs4HjHcuhPfhWyXU=; b=Fn8KmRY4Ean4cpGqmqfoNyJxyosPoqaYWfeS+P0obYx12mRZtOx7Qpdx7evJmqM/h4FKHgZIgQJHx1RCAOCh+O70fmHNMwP1Hg9YhbmPKA/VNSfVe1lumcJ0TgJCzmKxd5Own1R9JUcZMIk4UhW4r+t/imsmgXWJgiEox+FbL6w= 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 Return-Path: Received: from lists.gnu.org (lists.gnu.org [209.51.188.17]) by mx.zohomail.com with SMTPS id 1606999893711196.04407560990478; Thu, 3 Dec 2020 04:51:33 -0800 (PST) Received: from localhost ([::1]:57812 helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1kko56-0001eP-Ec for importer@patchew.org; Thu, 03 Dec 2020 07:51:32 -0500 Received: from eggs.gnu.org ([2001:470:142:3::10]:45188) by lists.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1kko1T-0004KX-SM; Thu, 03 Dec 2020 07:47:47 -0500 Received: from szxga04-in.huawei.com ([45.249.212.190]:2819) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1kko1R-0006v3-Sn; Thu, 03 Dec 2020 07:47:47 -0500 Received: from DGGEMS403-HUB.china.huawei.com (unknown [172.30.72.58]) by szxga04-in.huawei.com (SkyGuard) with ESMTP id 4CmwZz2FKlzkksn; Thu, 3 Dec 2020 20:47:07 +0800 (CST) Received: from huawei.com (10.174.186.236) by DGGEMS403-HUB.china.huawei.com (10.3.19.203) with Microsoft SMTP Server id 14.3.487.0; Thu, 3 Dec 2020 20:47:36 +0800 From: Yifei Jiang To: , Subject: [PATCH RFC v4 11/15] target/riscv: Implement virtual time adjusting with vm state changing Date: Thu, 3 Dec 2020 20:46:59 +0800 Message-ID: <20201203124703.168-12-jiangyifei@huawei.com> X-Mailer: git-send-email 2.26.2.windows.1 In-Reply-To: <20201203124703.168-1-jiangyifei@huawei.com> References: <20201203124703.168-1-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=45.249.212.190; envelope-from=jiangyifei@huawei.com; helo=szxga04-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=0.001, RCVD_IN_MSPIKE_WL=0.001, 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: victor.zhangxiaofeng@huawei.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, dengkai1@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 79228eb726..1e16d24544 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(__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(KVM_REG_RISCV_CONFIG, KVM_REG_RISCV_CONFIG_REG= (isa)); ret =3D kvm_get_one_reg(cs, id, &isa); if (ret) { --=20 2.19.1