From nobody Wed May 15 22:58:08 2024 Delivered-To: importer@patchew.org Authentication-Results: mx.zohomail.com; dkim=pass; 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=163.com ARC-Seal: i=1; a=rsa-sha256; t=1689685426; cv=none; d=zohomail.com; s=zohoarc; b=IPyGdDYWT9asMJm1Tgoh9G/kHvHuQYmf7h9szD9zBk2A87977lUNbX3KGi29xovyunkZRrH8Ub8SKt/KzLBuOzcZy434rSPqZovqwaDL58djfB+zr0JhiFAJgdzcrDc2Vg5hN//YxTU5CilUhBKAtiDHNtbnAiPoJu4Gjhg4mAQ= ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=zohomail.com; s=zohoarc; t=1689685426; h=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=4sMGboxBki1joNixHO9o9Dafl0VqbYT7X2KHXVc8DFQ=; b=EX5yCaOBRCrUpnlp63waORf9Ga6qPOhyWg92KTpmxamUTmrUboHDoFxHAXx63ZOw5RnDMRLXss9JFE096Nf6Rk0/asb77Qlcrn5fUPsvDi6P2++6dtOV5sbUF2JmQ2F1Lm0LUQeJ/eJjRexZDgSDnQQ1D+camNyTN88qoVRwgpM= ARC-Authentication-Results: i=1; mx.zohomail.com; dkim=pass; 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=<18622748025@163.com> (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 1689685426960963.0840989071884; Tue, 18 Jul 2023 06:03:46 -0700 (PDT) Received: from localhost ([::1] helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1qLkMW-0006Wq-Rw; Tue, 18 Jul 2023 09:03:32 -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 <18622748025@163.com>) id 1qLkMU-0006WX-Ok for qemu-devel@nongnu.org; Tue, 18 Jul 2023 09:03:30 -0400 Received: from m12.mail.163.com ([220.181.12.214]) by eggs.gnu.org with esmtp (Exim 4.90_1) (envelope-from <18622748025@163.com>) id 1qLkMR-0003D4-OH for qemu-devel@nongnu.org; Tue, 18 Jul 2023 09:03:30 -0400 Received: from localhost.localdomain (unknown [103.3.97.171]) by zwqz-smtp-mta-g2-3 (Coremail) with SMTP id _____wBHCB2YjbZkn+qQAg--.4828S2; Tue, 18 Jul 2023 21:03:20 +0800 (CST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=163.com; s=s110527; h=From:Subject:Date:Message-ID:MIME-Version; bh=4sMGb oxBki1joNixHO9o9Dafl0VqbYT7X2KHXVc8DFQ=; b=Ap1ZitNL4ykicfAOSN8Be sv0MACkSstCYHaka/CQUdndupSigXSU723m1ZV1dBNp62gRakPKCKFc/yxl1t2kr grnQ+zPz3y8ntg2TU9tiKJVFJfczH+iEspT9Qjzl27Aqyw0hKc+3NgDqX/cVNwOn 1H7j9b4ioHFib9heeaoSSA= From: "liguang.zhang" <18622748025@163.com> To: qemu-devel@nongnu.org Cc: pbonzini@redhat.com, alistair23@gmail.com, "liguang.zhang" Subject: [PATCH] target/riscv: Clearing the CSR values at reset and syncing the MPSTATE with the host Date: Tue, 18 Jul 2023 21:02:51 +0800 Message-ID: <20230718130317.12545-1-18622748025@163.com> X-Mailer: git-send-email 2.41.0 In-Reply-To: <20230625025018.26956-1-18622748025@163.com> References: <20230625025018.26956-1-18622748025@163.com> MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable X-CM-TRANSID: _____wBHCB2YjbZkn+qQAg--.4828S2 X-Coremail-Antispam: 1Uf129KBjvJXoWxXw1rWF1ktr4kArW8ZFyfXrb_yoW5Cr4kpF 4kC39xCws7trWxJw1ftFWDJF1ru3yxWrsxA3y7CrWaya15JrW5Xws2g3y2yr95Gry0yFWa kF43uFy3Ca1UKFDanT9S1TB71UUUUb7qnTZGkaVYY2UrUUUUjbIjqfuFe4nvWSU5nxnvy2 9KBjDUYxBIdaVFxhVjvjDU0xZFpf9x07jJJ5rUUUUU= X-Originating-IP: [103.3.97.171] X-CM-SenderInfo: bpryljasxumiisv6il2tof0z/xtbBFQiwWWB9ncRVOgABse 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=220.181.12.214; envelope-from=18622748025@163.com; helo=m12.mail.163.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, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, DKIM_VALID_EF=-0.1, FREEMAIL_ENVFROM_END_DIGIT=0.25, FREEMAIL_FROM=0.001, FROM_LOCAL_DIGITS=0.001, FROM_LOCAL_HEX=0.006, RCVD_IN_DNSWL_NONE=-0.0001, RCVD_IN_MSPIKE_BL=0.001, RCVD_IN_MSPIKE_L4=0.001, SPF_HELO_NONE=0.001, SPF_PASS=-0.001, T_SCC_BODY_TEXT_LINE=-0.01 autolearn=no 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: , Errors-To: qemu-devel-bounces+importer=patchew.org@nongnu.org Sender: qemu-devel-bounces+importer=patchew.org@nongnu.org X-ZohoMail-DKIM: pass (identity @163.com) X-ZM-MESSAGEID: 1689685489544100001 Content-Type: text/plain; charset="utf-8" From: "liguang.zhang" Fix the guest reboot error when using KVM There are two issues when rebooting a guest using KVM 1. When the guest initiates a reboot the host is unable to stop the vcpu 2. When running a SMP guest the qemu monitor system_reset causes a vcpu cra= sh This can be fixed by clearing the CSR values at reset and syncing the MPSTATE with the host. Signed-off-by: liguang.zhang --- target/riscv/kvm.c | 42 ++++++++++++++++++++++++++++++++++++++++ target/riscv/kvm_riscv.h | 1 + 2 files changed, 43 insertions(+) diff --git a/target/riscv/kvm.c b/target/riscv/kvm.c index 9d8a8982f9..ecc8ab8238 100644 --- a/target/riscv/kvm.c +++ b/target/riscv/kvm.c @@ -44,6 +44,8 @@ #include "migration/migration.h" #include "sysemu/runstate.h" =20 +static bool cap_has_mp_state; + static uint64_t kvm_riscv_reg_id(CPURISCVState *env, uint64_t type, uint64_t idx) { @@ -790,6 +792,24 @@ int kvm_arch_get_registers(CPUState *cs) return ret; } =20 +int kvm_riscv_sync_mpstate_to_kvm(RISCVCPU *cpu, int state) +{ + if (cap_has_mp_state) { + struct kvm_mp_state mp_state =3D { + .mp_state =3D state + }; + + int ret =3D kvm_vcpu_ioctl(CPU(cpu), KVM_SET_MP_STATE, &mp_state); + if (ret) { + fprintf(stderr, "%s: failed to sync MP_STATE %d/%s\n", + __func__, ret, strerror(-ret)); + return -1; + } + } + + return 0; +} + int kvm_arch_put_registers(CPUState *cs, int level) { int ret =3D 0; @@ -809,6 +829,18 @@ int kvm_arch_put_registers(CPUState *cs, int level) return ret; } =20 + if (KVM_PUT_RESET_STATE =3D=3D level) { + RISCVCPU *cpu =3D RISCV_CPU(cs); + if (cs->cpu_index =3D=3D 0) { + ret =3D kvm_riscv_sync_mpstate_to_kvm(cpu, KVM_MP_STATE_RUNNAB= LE); + } else { + ret =3D kvm_riscv_sync_mpstate_to_kvm(cpu, KVM_MP_STATE_STOPPE= D); + } + if (ret) { + return ret; + } + } + return ret; } =20 @@ -909,6 +941,7 @@ int kvm_arch_add_msi_route_post(struct kvm_irq_routing_= entry *route, =20 int kvm_arch_init(MachineState *ms, KVMState *s) { + cap_has_mp_state =3D kvm_check_extension(s, KVM_CAP_MP_STATE); return 0; } =20 @@ -987,10 +1020,19 @@ void kvm_riscv_reset_vcpu(RISCVCPU *cpu) if (!kvm_enabled()) { return; } + for (int i=3D0; i<32; i++) + env->gpr[i] =3D 0; env->pc =3D cpu->env.kernel_addr; env->gpr[10] =3D kvm_arch_vcpu_id(CPU(cpu)); /* a0 */ env->gpr[11] =3D cpu->env.fdt_addr; /* a1 */ env->satp =3D 0; + env->mie =3D 0; + env->stvec =3D 0; + env->sscratch =3D 0; + env->sepc =3D 0; + env->scause =3D 0; + env->stval =3D 0; + env->mip =3D 0; } =20 void kvm_riscv_set_irq(RISCVCPU *cpu, int irq, int level) diff --git a/target/riscv/kvm_riscv.h b/target/riscv/kvm_riscv.h index e3ba935808..3ea68c38e3 100644 --- a/target/riscv/kvm_riscv.h +++ b/target/riscv/kvm_riscv.h @@ -22,5 +22,6 @@ void kvm_riscv_init_user_properties(Object *cpu_obj); void kvm_riscv_reset_vcpu(RISCVCPU *cpu); void kvm_riscv_set_irq(RISCVCPU *cpu, int irq, int level); +int kvm_riscv_sync_mpstate_to_kvm(RISCVCPU *cpu, int state); =20 #endif --=20 2.17.1