From nobody Tue Feb 10 19:49:00 2026 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id E64F4EB64DC for ; Thu, 29 Jun 2023 07:58:26 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S232339AbjF2H6U (ORCPT ); Thu, 29 Jun 2023 03:58:20 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:34964 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S232593AbjF2H4P (ORCPT ); Thu, 29 Jun 2023 03:56:15 -0400 Received: from mail.loongson.cn (mail.loongson.cn [114.242.206.163]) by lindbergh.monkeyblade.net (Postfix) with ESMTP id A110230F8; Thu, 29 Jun 2023 00:55:46 -0700 (PDT) Received: from loongson.cn (unknown [10.2.5.185]) by gateway (Coremail) with SMTP id _____8Cx5cT_OJ1kysQDAA--.6213S3; Thu, 29 Jun 2023 15:55:43 +0800 (CST) Received: from localhost.localdomain (unknown [10.2.5.185]) by localhost.localdomain (Coremail) with SMTP id AQAAf8AxzyP6OJ1kYGYQAA--.18424S6; Thu, 29 Jun 2023 15:55:42 +0800 (CST) From: Tianrui Zhao To: linux-kernel@vger.kernel.org, kvm@vger.kernel.org Cc: Paolo Bonzini , Huacai Chen , WANG Xuerui , Greg Kroah-Hartman , loongarch@lists.linux.dev, Jens Axboe , Mark Brown , Alex Deucher , Oliver Upton , maobibo@loongson.cn, Xi Ruoyao , zhaotianrui@loongson.cn, tangyouling@loongson.cn, hejinyang@loongson.cn Subject: [PATCH v16 04/30] LoongArch: KVM: Implement VM related functions Date: Thu, 29 Jun 2023 15:55:12 +0800 Message-Id: <20230629075538.4063701-5-zhaotianrui@loongson.cn> X-Mailer: git-send-email 2.39.1 In-Reply-To: <20230629075538.4063701-1-zhaotianrui@loongson.cn> References: <20230629075538.4063701-1-zhaotianrui@loongson.cn> MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable X-CM-TRANSID: AQAAf8AxzyP6OJ1kYGYQAA--.18424S6 X-CM-SenderInfo: p2kd03xldq233l6o00pqjv00gofq/ X-Coremail-Antispam: 1Uk129KBjDUn29KB7ZKAUJUUUUU529EdanIXcx71UUUUU7KY7 ZEXasCq-sGcSsGvfJ3UbIjqfuFe4nvWSU5nxnvy29KBjDU0xBIdaVrnUUvcSsGvfC2Kfnx nUUI43ZEXa7xR_UUUUUUUUU== Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Type: text/plain; charset="utf-8" Implement LoongArch VM operations: Init and destroy vm interface, allocating memory page to save the vm pgd when init vm. Implement vm check extension, such as getting vcpu number info, memory slots info, and fpu info. And implement vm status description. Reviewed-by: Bibo Mao Signed-off-by: Tianrui Zhao --- arch/loongarch/kvm/vm.c | 76 +++++++++++++++++++++++++++++++++++++++++ 1 file changed, 76 insertions(+) create mode 100644 arch/loongarch/kvm/vm.c diff --git a/arch/loongarch/kvm/vm.c b/arch/loongarch/kvm/vm.c new file mode 100644 index 000000000000..84554988b4fd --- /dev/null +++ b/arch/loongarch/kvm/vm.c @@ -0,0 +1,76 @@ +// SPDX-License-Identifier: GPL-2.0 +/* + * Copyright (C) 2020-2023 Loongson Technology Corporation Limited + */ + +#include + +const struct _kvm_stats_desc kvm_vm_stats_desc[] =3D { + KVM_GENERIC_VM_STATS(), +}; + +const struct kvm_stats_header kvm_vm_stats_header =3D { + .name_size =3D KVM_STATS_NAME_SIZE, + .num_desc =3D ARRAY_SIZE(kvm_vm_stats_desc), + .id_offset =3D sizeof(struct kvm_stats_header), + .desc_offset =3D sizeof(struct kvm_stats_header) + KVM_STATS_NAME_SIZE, + .data_offset =3D sizeof(struct kvm_stats_header) + KVM_STATS_NAME_SIZE + + sizeof(kvm_vm_stats_desc), +}; + +int kvm_arch_init_vm(struct kvm *kvm, unsigned long type) +{ + /* Allocate page table to map GPA -> RPA */ + kvm->arch.gpa_mm.pgd =3D kvm_pgd_alloc(); + if (!kvm->arch.gpa_mm.pgd) + return -ENOMEM; + + kvm_init_vmcs(kvm); + kvm->arch.gpa_size =3D BIT(cpu_vabits - 1); + return 0; +} + +void kvm_arch_destroy_vm(struct kvm *kvm) +{ + kvm_destroy_vcpus(kvm); + _kvm_destroy_mm(kvm); +} + +int kvm_vm_ioctl_check_extension(struct kvm *kvm, long ext) +{ + int r; + + switch (ext) { + case KVM_CAP_ONE_REG: + case KVM_CAP_ENABLE_CAP: + case KVM_CAP_READONLY_MEM: + case KVM_CAP_SYNC_MMU: + case KVM_CAP_IMMEDIATE_EXIT: + case KVM_CAP_IOEVENTFD: + case KVM_CAP_MP_STATE: + r =3D 1; + break; + case KVM_CAP_NR_VCPUS: + r =3D num_online_cpus(); + break; + case KVM_CAP_MAX_VCPUS: + r =3D KVM_MAX_VCPUS; + break; + case KVM_CAP_MAX_VCPU_ID: + r =3D KVM_MAX_VCPU_IDS; + break; + case KVM_CAP_NR_MEMSLOTS: + r =3D KVM_USER_MEM_SLOTS; + break; + default: + r =3D 0; + break; + } + + return r; +} + +int kvm_arch_vm_ioctl(struct file *filp, unsigned int ioctl, unsigned long= arg) +{ + return -ENOIOCTLCMD; +} --=20 2.39.1