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 119B2C636D6 for ; Mon, 20 Feb 2023 06:58:19 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S230345AbjBTG5q (ORCPT ); Mon, 20 Feb 2023 01:57:46 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:35276 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S229669AbjBTG5m (ORCPT ); Mon, 20 Feb 2023 01:57:42 -0500 Received: from loongson.cn (mail.loongson.cn [114.242.206.163]) by lindbergh.monkeyblade.net (Postfix) with ESMTP id 68E26FF35; Sun, 19 Feb 2023 22:57:38 -0800 (PST) Received: from loongson.cn (unknown [10.2.5.185]) by gateway (Coremail) with SMTP id _____8AxUU_hGfNjELQCAA--.65S3; Mon, 20 Feb 2023 14:57:37 +0800 (CST) Received: from localhost.localdomain (unknown [10.2.5.185]) by localhost.localdomain (Coremail) with SMTP id AQAAf8Ax+73fGfNjFvk2AA--.34690S4; Mon, 20 Feb 2023 14:57:36 +0800 (CST) From: Tianrui Zhao To: Paolo Bonzini Cc: Huacai Chen , WANG Xuerui , Greg Kroah-Hartman , loongarch@lists.linux.dev, linux-kernel@vger.kernel.org, kvm@vger.kernel.org, Jens Axboe , Mark Brown , Alex Deucher , Oliver Upton , maobibo@loongson.cn Subject: [PATCH v2 02/29] LoongArch: KVM: Implement kvm module related interface Date: Mon, 20 Feb 2023 14:57:08 +0800 Message-Id: <20230220065735.1282809-3-zhaotianrui@loongson.cn> X-Mailer: git-send-email 2.31.1 In-Reply-To: <20230220065735.1282809-1-zhaotianrui@loongson.cn> References: <20230220065735.1282809-1-zhaotianrui@loongson.cn> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-CM-TRANSID: AQAAf8Ax+73fGfNjFvk2AA--.34690S4 X-CM-SenderInfo: p2kd03xldq233l6o00pqjv00gofq/ X-Coremail-Antispam: 1Uk129KBjvJXoWxXFWfWFW7Wry8Ary5WF1Dtrb_yoW5GFykpa 47urn5Jr48Jwn7X3ZIy3Wqvry5WrWkKF1I9a42va4Yy3srtr1q9w4kJr9FvFyxZ3ykJF4F vas5XFsxWF1DX3DanT9S1TB71UUUUjJqnTZGkaVYY2UrUUUUj1kv1TuYvTs0mT0YCTnIWj qI5I8CrVACY4xI64kE6c02F40Ex7xfYxn0WfASr-VFAUDa7-sFnT9fnUUIcSsGvfJTRUUU bckFc2x0x2IEx4CE42xK8VAvwI8IcIk0rVWrJVCq3wA2ocxC64kIII0Yj41l84x0c7CEw4 AK67xGY2AK021l84ACjcxK6xIIjxv20xvE14v26ryj6F1UM28EF7xvwVC0I7IYx2IY6xkF 7I0E14v26r4j6F4UM28EF7xvwVC2z280aVAFwI0_Gr1j6F4UJwA2z4x0Y4vEx4A2jsIEc7 CjxVAFwI0_Gr1j6F4UJwAaw2AFwI0_JF0_Jw1le2I262IYc4CY6c8Ij28IcVAaY2xG8wAq jxCEc2xF0cIa020Ex4CE44I27wAqx4xG64xvF2IEw4CE5I8CrVC2j2WlYx0E74AGY7Cv6c x26rWlOx8S6xCaFVCjc4AY6r1j6r4UM4x0Y48IcxkI7VAKI48JMxkF7I0En4kS14v26r12 6r1DMxAIw28IcxkI7VAKI48JMxAIw28IcVCjz48v1sIEY20_WwCFx2IqxVCFs4IE7xkEbV WUJVW8JwCFI7km07C267AKxVWUAVWUtwC20s026c02F40E14v26r1j6r18MI8I3I0E7480 Y4vE14v26r106r1rMI8E67AF67kF1VAFwI0_Jw0_GFylIxkGc2Ij64vIr41lIxAIcVC0I7 IYx2IY67AKxVW8JVW5JwCI42IY6xIIjxv20xvEc7CjxVAFwI0_Gr0_Cr1lIxAIcVCF04k2 6cxKx2IYs7xG6r1j6r1xMIIF0xvEx4A2jsIE14v26r4j6F4UMIIF0xvEx4A2jsIEc7CjxV AFwI0_Gr0_Gr1UYxBIdaVFxhVjvjDU0xZFpf9x0zR9iSdUUUUU= Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Implement loongarch kvm module init, module exit interface, using kvm context to save the vpid info and vcpu world switch interface pointer. Signed-off-by: Tianrui Zhao --- arch/loongarch/kvm/main.c | 81 +++++++++++++++++++++++++++++++++++++++ 1 file changed, 81 insertions(+) create mode 100644 arch/loongarch/kvm/main.c diff --git a/arch/loongarch/kvm/main.c b/arch/loongarch/kvm/main.c new file mode 100644 index 000000000..d7969d02a --- /dev/null +++ b/arch/loongarch/kvm/main.c @@ -0,0 +1,81 @@ +// SPDX-License-Identifier: GPL-2.0 +/* + * Copyright (C) 2020-2023 Loongson Technology Corporation Limited + */ + +#include +#include +#include +#include +#include + +static struct kvm_context __percpu *vmcs; + +int kvm_arch_init(void *opaque) +{ + struct kvm_context *context; + unsigned long vpid_mask; + int cpu, order; + void *addr; + + vmcs = alloc_percpu(struct kvm_context); + if (!vmcs) { + pr_err("kvm: failed to allocate percpu kvm_context\n"); + return -ENOMEM; + } + + order = get_order(kvm_vector_size + kvm_enter_guest_size); + addr = (void *)__get_free_pages(GFP_KERNEL, order); + if (!addr) { + free_percpu(vmcs); + return -ENOMEM; + } + + memcpy(addr, kvm_vector_entry, kvm_vector_size); + memcpy(addr + kvm_vector_size, kvm_enter_guest, kvm_enter_guest_size); + flush_icache_range((unsigned long)addr, (unsigned long)addr + + kvm_vector_size + kvm_enter_guest_size); + + vpid_mask = read_csr_gstat(); + vpid_mask = (vpid_mask & CSR_GSTAT_GIDBIT) >> CSR_GSTAT_GIDBIT_SHIFT; + if (vpid_mask) + vpid_mask = GENMASK(vpid_mask - 1, 0); + + for_each_possible_cpu(cpu) { + context = per_cpu_ptr(vmcs, cpu); + context->vpid_mask = vpid_mask; + context->vpid_cache = context->vpid_mask + 1; + context->last_vcpu = NULL; + context->kvm_eentry = addr; + context->kvm_enter_guest = addr + kvm_vector_size; + context->page_order = order; + } + + _kvm_init_fault(); + + return 0; +} + +void kvm_arch_exit(void) +{ + struct kvm_context *context = per_cpu_ptr(vmcs, 0); + + free_pages((unsigned long)context->kvm_eentry, context->page_order); + free_percpu(vmcs); +} + +static int kvm_loongarch_init(void) +{ + if (!cpu_has_lvz) + return 0; + + return kvm_init(NULL, sizeof(struct kvm_vcpu), 0, THIS_MODULE); +} + +static void kvm_loongarch_exit(void) +{ + kvm_exit(); +} + +module_init(kvm_loongarch_init); +module_exit(kvm_loongarch_exit); -- 2.31.1