From nobody Fri Apr 4 04:38:56 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 1740484935939203.60381261359282; Tue, 25 Feb 2025 04:02:15 -0800 (PST) Received: from localhost ([::1] helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1tmtcv-0003pp-JF; Tue, 25 Feb 2025 07:01:29 -0500 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 1tmtcO-0003je-Lg for qemu-devel@nongnu.org; Tue, 25 Feb 2025 07:01:02 -0500 Received: from mail.loongson.cn ([114.242.206.163]) by eggs.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1tmtcJ-0006W1-3P for qemu-devel@nongnu.org; Tue, 25 Feb 2025 07:00:55 -0500 Received: from loongson.cn (unknown [10.2.5.213]) by gateway (Coremail) with SMTP id _____8AxTWvvsL1nOBaCAA--.26395S3; Tue, 25 Feb 2025 20:00:47 +0800 (CST) Received: from localhost.localdomain (unknown [10.2.5.213]) by front1 (Coremail) with SMTP id qMiowMBxLsfpsL1n2uMnAA--.19507S10; Tue, 25 Feb 2025 20:00:47 +0800 (CST) From: Bibo Mao To: Stefan Hajnoczi Cc: qemu-devel@nongnu.org, Song Gao Subject: [PULL 08/11] target/loongarch: Enable paravirt ipi feature Date: Tue, 25 Feb 2025 20:00:38 +0800 Message-Id: <20250225120041.1652869-9-maobibo@loongson.cn> X-Mailer: git-send-email 2.39.3 In-Reply-To: <20250225120041.1652869-1-maobibo@loongson.cn> References: <20250225120041.1652869-1-maobibo@loongson.cn> MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable X-CM-TRANSID: qMiowMBxLsfpsL1n2uMnAA--.19507S10 X-CM-SenderInfo: xpdruxter6z05rqj20fqof0/ 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=maobibo@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_CERTIFIED_BLOCKED=0.001, RCVD_IN_VALIDITY_RPBL_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: 1740484937472019000 Content-Type: text/plain; charset="utf-8" The similiar with cpucfg register, paravirt ipi feature is set in function kvm_arch_put_registers(). Instead the paravirt feature can be enabled only once, it cannot be changed dynamically. Signed-off-by: Bibo Mao Reviewed-by: Bibo Mao --- target/loongarch/kvm/kvm.c | 36 ++++++++++++++++++++++++++++++++++++ 1 file changed, 36 insertions(+) diff --git a/target/loongarch/kvm/kvm.c b/target/loongarch/kvm/kvm.c index 3117441f53..ed0706e8e0 100644 --- a/target/loongarch/kvm/kvm.c +++ b/target/loongarch/kvm/kvm.c @@ -83,6 +83,33 @@ static int kvm_set_stealtime(CPUState *cs) return 0; } =20 +static int kvm_set_pv_features(CPUState *cs) +{ + CPULoongArchState *env =3D cpu_env(cs); + int err; + uint64_t val; + struct kvm_device_attr attr =3D { + .group =3D KVM_LOONGARCH_VCPU_CPUCFG, + .attr =3D CPUCFG_KVM_FEATURE, + .addr =3D (uint64_t)&val, + }; + + err =3D kvm_vcpu_ioctl(cs, KVM_HAS_DEVICE_ATTR, attr); + if (err) { + return 0; + } + + val =3D env->pv_features; + err =3D kvm_vcpu_ioctl(cs, KVM_SET_DEVICE_ATTR, attr); + if (err) { + error_report("Fail to set pv feature "TARGET_FMT_lx " with error %= s", + val, strerror(errno)); + return err; + } + + return 0; +} + static int kvm_loongarch_get_regs_core(CPUState *cs) { int ret =3D 0; @@ -738,6 +765,7 @@ int kvm_arch_get_registers(CPUState *cs, Error **errp) int kvm_arch_put_registers(CPUState *cs, int level, Error **errp) { int ret; + static int once; =20 ret =3D kvm_loongarch_put_regs_core(cs); if (ret) { @@ -764,6 +792,14 @@ int kvm_arch_put_registers(CPUState *cs, int level, Er= ror **errp) return ret; } =20 + if (!once) { + ret =3D kvm_set_pv_features(cs); + if (ret) { + return ret; + } + once =3D 1; + } + if (level >=3D KVM_PUT_FULL_STATE) { /* * only KVM_PUT_FULL_STATE is required, kvm kernel will clear --=20 2.43.5