From nobody Fri Dec 19 14:10:42 2025 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 77F2BC83F10 for ; Thu, 31 Aug 2023 08:30:41 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S245576AbjHaIam (ORCPT ); Thu, 31 Aug 2023 04:30:42 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:53732 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S243338AbjHaIaf (ORCPT ); Thu, 31 Aug 2023 04:30:35 -0400 Received: from mail.loongson.cn (mail.loongson.cn [114.242.206.163]) by lindbergh.monkeyblade.net (Postfix) with ESMTP id 5FAF3CE7; Thu, 31 Aug 2023 01:30:31 -0700 (PDT) Received: from loongson.cn (unknown [10.2.5.185]) by gateway (Coremail) with SMTP id _____8BxbOqkT_BkB14dAA--.32670S3; Thu, 31 Aug 2023 16:30:28 +0800 (CST) Received: from localhost.localdomain (unknown [10.2.5.185]) by localhost.localdomain (Coremail) with SMTP id AQAAf8Ax3c6gT_BkOPVnAA--.55892S6; Thu, 31 Aug 2023 16:30:27 +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 Subject: [PATCH v20 04/30] LoongArch: KVM: Implement VM related functions Date: Thu, 31 Aug 2023 16:29:54 +0800 Message-Id: <20230831083020.2187109-5-zhaotianrui@loongson.cn> X-Mailer: git-send-email 2.39.1 In-Reply-To: <20230831083020.2187109-1-zhaotianrui@loongson.cn> References: <20230831083020.2187109-1-zhaotianrui@loongson.cn> MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable X-CM-TRANSID: AQAAf8Ax3c6gT_BkOPVnAA--.55892S6 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 0000000000..bde78f0633 --- /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.pgd =3D kvm_pgd_alloc(); + if (!kvm->arch.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 2.27.0