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[2403:580b:97e8:0:321:6fb2:58f1:a1b1]) by smtp.gmail.com with ESMTPSA id ja20-20020a170902efd400b001c1f4edfb9csm726348plb.173.2023.10.11.21.12.14 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Wed, 11 Oct 2023 21:12:16 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20230601; t=1697083937; x=1697688737; darn=nongnu.org; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:from:to:cc:subject:date :message-id:reply-to; bh=Uaz6kE7HcEYlJYnxILnPAa7QFnCLIbyAtvlPqF2wjd8=; b=KNPq2Pm1d9X0ZqP3hhPIJdEh/tBm6uI+WiyYBh7ODEErKEznDJGyjLSClOcnKDjzzj /JnQKu2Stqtyuv6M82gH8VujIEfjOwdie0WYdcHf99hmvoRpFIML9eGVLuHEd7PrgcAO i1Keodp77a05nmSYu1eGyH7aZHmygRDTvQSYGzIXWHoguOBY2TPvhET7s/pMpR/wTkl6 /qWMWW/IthGwLEIUjlJo1iPvZ9Is/dxA3P6yxHzr3qW4hmLM/2CMPahvAA9M9LCBo83G LwpgOHQ31UnvZzO8uwuqLzptattKgwTZ4TFVHSL4mRmBnXah1ok9529cPWXkKOlOCnEY 49dw== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1697083937; x=1697688737; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:x-gm-message-state:from:to:cc :subject:date:message-id:reply-to; bh=Uaz6kE7HcEYlJYnxILnPAa7QFnCLIbyAtvlPqF2wjd8=; b=IvbEro+iqiG/2qc3iczjUECbxCcD2qvv4zksqim0E5DfjcY9p0L7TalR+VvUw4A6Xe YS2Mebz2UPWBz0e3g+9f/Q7x5zw3DIqV0VjL+RFJG0DJfu25Z/Tiaxiu0oD3Q/WcHWHF 78UFAOxDekp4PG3MnCiCuQ/cBhWzWPDZIwaZvIWOfqNVFb+SN304SAlpBvTFfACwPF7+ y9YyeRP0p9H3/YXwSr4+clXbHigxzzA0iDGVAPCJo/YYFXvei9aJz4scrRiZAkGMrAyM fqNlLwqkKkZOqyDf5tDG4wnbfXWx7yVtOkXoyW+9uOmLlidjn1jaLKXmoxupltxfDqK3 G4KQ== X-Gm-Message-State: AOJu0Yywm9wJOPhjt7CzWK72C7PYvKx6JTxxvrT7Qu2N02gnIYCyLW18 CZQzYwuVNANIZsNjT17zHqc9YrixlsLkmQ== X-Google-Smtp-Source: AGHT+IGYjMxTSe3zNWGzYhUPCYasW/XvJBqaB5pmp+1t6U4w+mp8nr+azkw1I8ORrJTjCzai445vrg== X-Received: by 2002:a17:902:c40c:b0:1c8:90bf:4234 with SMTP id k12-20020a170902c40c00b001c890bf4234mr21832825plk.61.1697083937326; Wed, 11 Oct 2023 21:12:17 -0700 (PDT) From: Alistair Francis X-Google-Original-From: Alistair Francis To: qemu-devel@nongnu.org Cc: alistair23@gmail.com, "liguang.zhang" , Alistair Francis Subject: [PULL 21/54] target/riscv: Clear CSR values at reset and sync MPSTATE with host Date: Thu, 12 Oct 2023 14:10:18 +1000 Message-ID: <20231012041051.2572507-22-alistair.francis@wdc.com> X-Mailer: git-send-email 2.41.0 In-Reply-To: <20231012041051.2572507-1-alistair.francis@wdc.com> References: <20231012041051.2572507-1-alistair.francis@wdc.com> MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable 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=2607:f8b0:4864:20::634; envelope-from=alistair23@gmail.com; helo=mail-pl1-x634.google.com X-Spam_score_int: -17 X-Spam_score: -1.8 X-Spam_bar: - X-Spam_report: (-1.8 / 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, RCVD_IN_DNSWL_NONE=-0.0001, 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: 2.1.29 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 @gmail.com) X-ZM-MESSAGEID: 1697083976381100003 Content-Type: text/plain; charset="utf-8" From: "liguang.zhang" This patch fixes guest reboot errors 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 Reviewed-by: Alistair Francis Message-ID: <20230913091332.17355-1-18622748025@163.com> [ Changes by AF - Fixup commit message - Fixup patch style ] Signed-off-by: Alistair Francis --- target/riscv/kvm_riscv.h | 1 + target/riscv/kvm.c | 44 ++++++++++++++++++++++++++++++++++++++++ 2 files changed, 45 insertions(+) diff --git a/target/riscv/kvm_riscv.h b/target/riscv/kvm_riscv.h index 69e807fbfb..44b850a046 100644 --- a/target/riscv/kvm_riscv.h +++ b/target/riscv/kvm_riscv.h @@ -30,5 +30,6 @@ void kvm_riscv_aia_create(MachineState *machine, uint64_t= group_shift, uint64_t aplic_base, uint64_t imsic_base, uint64_t guest_num); void riscv_kvm_aplic_request(void *opaque, int irq, int level); +int kvm_riscv_sync_mpstate_to_kvm(RISCVCPU *cpu, int state); =20 #endif diff --git a/target/riscv/kvm.c b/target/riscv/kvm.c index 14763ec0cd..1e4e4456b3 100644 --- a/target/riscv/kvm.c +++ b/target/riscv/kvm.c @@ -51,6 +51,8 @@ void riscv_kvm_aplic_request(void *opaque, int irq, int l= evel) kvm_set_irq(kvm_state, irq, !!level); } =20 +static bool cap_has_mp_state; + static uint64_t kvm_riscv_reg_id(CPURISCVState *env, uint64_t type, uint64_t idx) { @@ -795,6 +797,24 @@ 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; @@ -814,6 +834,18 @@ 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 @@ -926,6 +958,7 @@ int kvm_arch_get_default_type(MachineState *ms) =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 @@ -1008,14 +1041,25 @@ int kvm_arch_handle_exit(CPUState *cs, struct kvm_r= un *run) void kvm_riscv_reset_vcpu(RISCVCPU *cpu) { CPURISCVState *env =3D &cpu->env; + int i; =20 if (!kvm_enabled()) { return; } + for (i =3D 0; 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) --=20 2.41.0