From nobody Fri Nov 14 18:26:44 2025 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 Return-Path: Received: from lists.gnu.org (lists.gnu.org [209.51.188.17]) by mx.zohomail.com with SMTPS id 1760514743363286.61546983430037; Wed, 15 Oct 2025 00:52:23 -0700 (PDT) Received: from localhost ([::1] helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1v8wIY-0004RA-LU; Wed, 15 Oct 2025 03:51:50 -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 1v8wIV-0004QW-DY for qemu-devel@nongnu.org; Wed, 15 Oct 2025 03:51:47 -0400 Received: from mail.loongson.cn ([114.242.206.163]) by eggs.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1v8wIP-00056B-C1 for qemu-devel@nongnu.org; Wed, 15 Oct 2025 03:51:47 -0400 Received: from loongson.cn (unknown [10.2.5.185]) by gateway (Coremail) with SMTP id _____8CxK9KGUu9oH1UWAA--.46304S3; Wed, 15 Oct 2025 15:51:34 +0800 (CST) Received: from localhost.localdomain (unknown [10.2.5.185]) by front1 (Coremail) with SMTP id qMiowJBxpeSFUu9oUBrlAA--.45820S2; Wed, 15 Oct 2025 15:51:33 +0800 (CST) From: Song Gao To: maobibo@loongson.cn Cc: qemu-devel@nongnu.org, philmd@linaro.org, jiaxun.yang@flygoat.com Subject: [RFC PATCH] target/loongarch: Add kvm support dintc Date: Wed, 15 Oct 2025 15:27:45 +0800 Message-Id: <20251015072745.3921106-1-gaosong@loongson.cn> X-Mailer: git-send-email 2.39.1 MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable X-CM-TRANSID: qMiowJBxpeSFUu9oUBrlAA--.45820S2 X-CM-SenderInfo: 5jdr20tqj6z05rqj20fqof0/ X-Coremail-Antispam: 1Uk129KBjDUn29KB7ZKAUJUUUUU529EdanIXcx71UUUUU7KY7 ZEXasCq-sGcSsGvfJ3UbIjqfuFe4nvWSU5nxnvy29KBjDU0xBIdaVrnUUvcSsGvfC2Kfnx nUUI43ZEXa7xR_UUUUUUUUU== 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=114.242.206.163; envelope-from=gaosong@loongson.cn; helo=mail.loongson.cn 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, RCVD_IN_VALIDITY_RPBL_BLOCKED=0.001, RCVD_IN_VALIDITY_SAFE_BLOCKED=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: 2.1.29 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-ZM-MESSAGEID: 1760514752806158500 Content-Type: text/plain; charset="utf-8" This patch adds set/get msgint CSRs and check msgint feature. Signed-off-by: Song Gao --- RFC: this patch need update linux-headers and=20 the linux kernel kvm support avec(not merged). linux-headers/asm-loongarch/kvm.h | 1 + target/loongarch/cpu.h | 1 + target/loongarch/kvm/kvm.c | 59 ++++++++++++++++++++++++++++++- 3 files changed, 60 insertions(+), 1 deletion(-) diff --git a/linux-headers/asm-loongarch/kvm.h b/linux-headers/asm-loongarc= h/kvm.h index 5f354f5c68..20e69561bf 100644 --- a/linux-headers/asm-loongarch/kvm.h +++ b/linux-headers/asm-loongarch/kvm.h @@ -103,6 +103,7 @@ struct kvm_fpu { #define KVM_LOONGARCH_VM_FEAT_PMU 5 #define KVM_LOONGARCH_VM_FEAT_PV_IPI 6 #define KVM_LOONGARCH_VM_FEAT_PV_STEALTIME 7 +#define KVM_LOONGARCH_VM_FEAT_MSGINT 8 =20 /* Device Control API on vcpu fd */ #define KVM_LOONGARCH_VCPU_CPUCFG 0 diff --git a/target/loongarch/cpu.h b/target/loongarch/cpu.h index b8e3b46c3a..e714b4252e 100644 --- a/target/loongarch/cpu.h +++ b/target/loongarch/cpu.h @@ -278,6 +278,7 @@ enum loongarch_features { LOONGARCH_FEATURE_PMU, LOONGARCH_FEATURE_PV_IPI, LOONGARCH_FEATURE_STEALTIME, + LOONGARCH_FEATURE_MSGINT, }; =20 typedef struct LoongArchBT { diff --git a/target/loongarch/kvm/kvm.c b/target/loongarch/kvm/kvm.c index 4e4f4e79f6..7c48787d97 100644 --- a/target/loongarch/kvm/kvm.c +++ b/target/loongarch/kvm/kvm.c @@ -316,6 +316,18 @@ static int kvm_loongarch_get_csr(CPUState *cs) ret |=3D kvm_get_one_reg(cs, KVM_IOC_CSRID(LOONGARCH_CSR_DMW(3)), &env->CSR_DMW[3]); =20 + ret |=3D kvm_get_one_reg(cs, KVM_IOC_CSRID(LOONGARCH_CSR_MSGIS(0)), + &env->CSR_MSGIS[0]); + + ret |=3D kvm_get_one_reg(cs, KVM_IOC_CSRID(LOONGARCH_CSR_MSGIS(1)), + &env->CSR_MSGIS[1]); + + ret |=3D kvm_get_one_reg(cs, KVM_IOC_CSRID(LOONGARCH_CSR_MSGIS(2)), + &env->CSR_MSGIS[2]); + + ret |=3D kvm_get_one_reg(cs, KVM_IOC_CSRID(LOONGARCH_CSR_MSGIS(3)), + &env->CSR_MSGIS[3]); + ret |=3D kvm_get_one_reg(cs, KVM_IOC_CSRID(LOONGARCH_CSR_TVAL), &env->CSR_TVAL); =20 @@ -488,6 +500,19 @@ static int kvm_loongarch_put_csr(CPUState *cs, KvmPutS= tate level) =20 ret |=3D kvm_set_one_reg(cs, KVM_IOC_CSRID(LOONGARCH_CSR_DMW(3)), &env->CSR_DMW[3]); + + ret |=3D kvm_set_one_reg(cs, KVM_IOC_CSRID(LOONGARCH_CSR_MSGIS(0)), + &env->CSR_MSGIS[0]); + + ret |=3D kvm_set_one_reg(cs, KVM_IOC_CSRID(LOONGARCH_CSR_MSGIS(1)), + &env->CSR_MSGIS[1]); + + ret |=3D kvm_set_one_reg(cs, KVM_IOC_CSRID(LOONGARCH_CSR_MSGIS(2)), + &env->CSR_MSGIS[2]); + + ret |=3D kvm_set_one_reg(cs, KVM_IOC_CSRID(LOONGARCH_CSR_MSGIS(3)), + &env->CSR_MSGIS[3]); + /* * timer cfg must be put at last since it is used to enable * guest timer @@ -930,7 +955,11 @@ static bool kvm_feature_supported(CPUState *cs, enum l= oongarch_features feature) attr.attr =3D KVM_LOONGARCH_VM_FEAT_PV_STEALTIME; ret =3D kvm_vm_ioctl(kvm_state, KVM_HAS_DEVICE_ATTR, &attr); return (ret =3D=3D 0); - + case LOONGARCH_FEATURE_MSGINT: + attr.group =3D KVM_LOONGARCH_VM_FEAT_CTRL; + attr.attr =3D KVM_LOONGARCH_VM_FEAT_MSGINT; + ret =3D kvm_vm_ioctl(kvm_state, KVM_HAS_DEVICE_ATTR, &attr); + return (ret =3D=3D 0); default: return false; } @@ -1074,6 +1103,28 @@ static int kvm_cpu_check_pv_features(CPUState *cs, E= rror **errp) return 0; } =20 +static int kvm_cpu_check_msgint(CPUState *cs, Error **errp) +{ + CPULoongArchState *env =3D cpu_env(cs); + LoongArchCPU *cpu =3D LOONGARCH_CPU(cs); + bool kvm_supported; + + kvm_supported =3D kvm_feature_supported(cs, LOONGARCH_FEATURE_MSGINT); + env->cpucfg[1] =3D FIELD_DP32(env->cpucfg[1], CPUCFG1, MSG_INT, 0); + if (cpu->msgint =3D=3D ON_OFF_AUTO_ON) { + if (kvm_supported) { + env->cpucfg[1] =3D FIELD_DP32(env->cpucfg[1], CPUCFG1, MSG_INT= , 1); + } else { + error_setg(errp, "'msgint' feature not supported by KVM on thi= s host"); + return -ENOTSUP; + } + } else if ((cpu->msgint =3D=3D ON_OFF_AUTO_AUTO) && kvm_supported) { + env->cpucfg[1] =3D FIELD_DP32(env->cpucfg[1], CPUCFG1, MSG_INT, 1); + } + + return 0; +} + int kvm_arch_pre_create_vcpu(CPUState *cpu, Error **errp) { return 0; @@ -1123,6 +1174,12 @@ int kvm_arch_init_vcpu(CPUState *cs) return ret; } =20 + ret =3D kvm_cpu_check_msgint(cs, &local_err); + if (ret < 0) { + error_report_err(local_err); + return ret; + } + return 0; } =20 base-commit: 3bf5c57a11827d9fa706524d57ee3e5af68a429e --=20 2.41.0