From nobody Tue Feb 10 05:17:07 2026 Received: from mail.loongson.cn (mail.loongson.cn [114.242.206.163]) by smtp.subspace.kernel.org (Postfix) with ESMTP id EFD7D2C3248; Wed, 28 Jan 2026 03:03:40 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=114.242.206.163 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1769569424; cv=none; b=TyAh472OcxPWSi1Fv2o8dBdmY6mEyfHMImYNdiEXN3DZIHcLbZKzqZKOZOvtAasVmTYrbNTJ3+Cb05Ba9TPN5cnbaKNL1DRFXBfiSVP65qBHbR5qOSq94lWSTzBgm4qm7KrCU8fFrRfc++vMhIAvlQmNORy25zermplMIanXVTs= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1769569424; c=relaxed/simple; bh=esmrRAWV32wi8JXlteqNrYuH+IbazgNJ6/6QEtR9FaA=; h=From:To:Cc:Subject:Date:Message-Id:In-Reply-To:References: MIME-Version; b=PXt1xY8/2OLY/lUnOUCthGGTDG1lCSf/Zj+OCNGUD5BtmxEb4WW7vuonzqq9brlOeNEof5XTTO9F2M4EIhgBmQOwapQ0ILeVcaiWO71JaQya1uCKpn3VVFECb1j8AnZ4dNSkRRNL/YMh4HKRJFsVndlJhJERANSXU8ilV0SWnDw= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dmarc=none (p=none dis=none) header.from=loongson.cn; spf=pass smtp.mailfrom=loongson.cn; arc=none smtp.client-ip=114.242.206.163 Authentication-Results: smtp.subspace.kernel.org; dmarc=none (p=none dis=none) header.from=loongson.cn Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=loongson.cn Received: from loongson.cn (unknown [10.2.5.213]) by gateway (Coremail) with SMTP id _____8DxusKDfHlp+2INAA--.43215S3; Wed, 28 Jan 2026 11:03:31 +0800 (CST) Received: from localhost.localdomain (unknown [10.2.5.213]) by front1 (Coremail) with SMTP id qMiowJDxaeB_fHlpfUg2AA--.40601S3; Wed, 28 Jan 2026 11:03:31 +0800 (CST) From: Bibo Mao To: Huacai Chen , WANG Xuerui , Tianrui Zhao Cc: loongarch@lists.linux.dev, linux-kernel@vger.kernel.org, kvm@vger.kernel.org Subject: [PATCH 1/4] LoongArch: KVM: Move feature detection in function kvm_vm_init_features Date: Wed, 28 Jan 2026 11:03:23 +0800 Message-Id: <20260128030326.3377462-2-maobibo@loongson.cn> X-Mailer: git-send-email 2.39.3 In-Reply-To: <20260128030326.3377462-1-maobibo@loongson.cn> References: <20260128030326.3377462-1-maobibo@loongson.cn> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable X-CM-TRANSID: qMiowJDxaeB_fHlpfUg2AA--.40601S3 X-CM-SenderInfo: xpdruxter6z05rqj20fqof0/ X-Coremail-Antispam: 1Uk129KBjDUn29KB7ZKAUJUUUUU529EdanIXcx71UUUUU7KY7 ZEXasCq-sGcSsGvfJ3UbIjqfuFe4nvWSU5nxnvy29KBjDU0xBIdaVrnUUvcSsGvfC2Kfnx nUUI43ZEXa7xR_UUUUUUUUU== Content-Type: text/plain; charset="utf-8" VM feature detection is sparsed in function kvm_vm_init_features() and kvm_vm_feature_has_attr(). Here move all the feature detection in function kvm_vm_init_features(), and there is only feature checking in function kvm_vm_feature_has_attr(). Signed-off-by: Bibo Mao --- arch/loongarch/kvm/vm.c | 36 +++++++++++++++--------------------- 1 file changed, 15 insertions(+), 21 deletions(-) diff --git a/arch/loongarch/kvm/vm.c b/arch/loongarch/kvm/vm.c index 194ccbcdc3b3..ae79c50db9e1 100644 --- a/arch/loongarch/kvm/vm.c +++ b/arch/loongarch/kvm/vm.c @@ -40,6 +40,21 @@ static void kvm_vm_init_features(struct kvm *kvm) kvm->arch.pv_features |=3D BIT(KVM_FEATURE_STEAL_TIME); kvm->arch.kvm_features |=3D BIT(KVM_LOONGARCH_VM_FEAT_PV_STEALTIME); } + + if (cpu_has_lsx) + kvm->arch.kvm_features |=3D BIT(KVM_LOONGARCH_VM_FEAT_LSX); + if (cpu_has_lasx) + kvm->arch.kvm_features |=3D BIT(KVM_LOONGARCH_VM_FEAT_LASX); + if (cpu_has_lbt_x86) + kvm->arch.kvm_features |=3D BIT(KVM_LOONGARCH_VM_FEAT_X86BT); + if (cpu_has_lbt_arm) + kvm->arch.kvm_features |=3D BIT(KVM_LOONGARCH_VM_FEAT_ARMBT); + if (cpu_has_lbt_mips) + kvm->arch.kvm_features |=3D BIT(KVM_LOONGARCH_VM_FEAT_MIPSBT); + if (cpu_has_ptw) + kvm->arch.kvm_features |=3D BIT(KVM_LOONGARCH_VM_FEAT_PTW); + if (cpu_has_msgint) + kvm->arch.kvm_features |=3D BIT(KVM_LOONGARCH_VM_FEAT_MSGINT); } =20 int kvm_arch_init_vm(struct kvm *kvm, unsigned long type) @@ -131,33 +146,12 @@ static int kvm_vm_feature_has_attr(struct kvm *kvm, s= truct kvm_device_attr *attr { switch (attr->attr) { case KVM_LOONGARCH_VM_FEAT_LSX: - if (cpu_has_lsx) - return 0; - return -ENXIO; case KVM_LOONGARCH_VM_FEAT_LASX: - if (cpu_has_lasx) - return 0; - return -ENXIO; case KVM_LOONGARCH_VM_FEAT_X86BT: - if (cpu_has_lbt_x86) - return 0; - return -ENXIO; case KVM_LOONGARCH_VM_FEAT_ARMBT: - if (cpu_has_lbt_arm) - return 0; - return -ENXIO; case KVM_LOONGARCH_VM_FEAT_MIPSBT: - if (cpu_has_lbt_mips) - return 0; - return -ENXIO; case KVM_LOONGARCH_VM_FEAT_PTW: - if (cpu_has_ptw) - return 0; - return -ENXIO; case KVM_LOONGARCH_VM_FEAT_MSGINT: - if (cpu_has_msgint) - return 0; - return -ENXIO; case KVM_LOONGARCH_VM_FEAT_PMU: case KVM_LOONGARCH_VM_FEAT_PV_IPI: case KVM_LOONGARCH_VM_FEAT_PV_STEALTIME: --=20 2.39.3