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[2620:137:e000::1:20]) by mx.google.com with ESMTP id x5-20020a654145000000b005138c1f1fccsi11049978pgp.31.2023.04.17.02.50.03; Mon, 17 Apr 2023 02:50:18 -0700 (PDT) Received-SPF: pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 2620:137:e000::1:20 as permitted sender) client-ip=2620:137:e000::1:20; Authentication-Results: mx.google.com; spf=pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 2620:137:e000::1:20 as permitted sender) smtp.mailfrom=linux-kernel-owner@vger.kernel.org Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S230440AbjDQJsB (ORCPT + 99 others); Mon, 17 Apr 2023 05:48:01 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:48552 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S230135AbjDQJr4 (ORCPT ); Mon, 17 Apr 2023 05:47:56 -0400 Received: from loongson.cn (mail.loongson.cn [114.242.206.163]) by lindbergh.monkeyblade.net (Postfix) with ESMTP id CE3716A78; Mon, 17 Apr 2023 02:47:17 -0700 (PDT) Received: from loongson.cn (unknown [10.2.5.185]) by gateway (Coremail) with SMTP id _____8CxjdqMFT1k_OIdAA--.35034S3; Mon, 17 Apr 2023 17:46:52 +0800 (CST) Received: from localhost.localdomain (unknown [10.2.5.185]) by localhost.localdomain (Coremail) with SMTP id AQAAf8CxtryKFT1kyagqAA--.47974S5; Mon, 17 Apr 2023 17:46:51 +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, Xi Ruoyao , zhaotianrui@loongson.cn Subject: [PATCH v7 03/30] LoongArch: KVM: Implement kvm hardware enable, disable interface Date: Mon, 17 Apr 2023 17:46:22 +0800 Message-Id: <20230417094649.874671-4-zhaotianrui@loongson.cn> X-Mailer: git-send-email 2.31.1 In-Reply-To: <20230417094649.874671-1-zhaotianrui@loongson.cn> References: <20230417094649.874671-1-zhaotianrui@loongson.cn> MIME-Version: 1.0 X-CM-TRANSID: AQAAf8CxtryKFT1kyagqAA--.47974S5 X-CM-SenderInfo: p2kd03xldq233l6o00pqjv00gofq/ X-Coremail-Antispam: 1Uk129KBjvJXoW7Ar4DJrWxKFW5ur4DKry5XFb_yoW8tF4fpr WUCFW5Ary5tr1Sgas3J3Zxtr13GrWvgayxXa12ya45Jw4j9F4rXF95Kr9rJFyUX3y8ZF1S v39YyFyF9F1DArUanT9S1TB71UUUUj7qnTZGkaVYY2UrUUUUj1kv1TuYvTs0mT0YCTnIWj qI5I8CrVACY4xI64kE6c02F40Ex7xfYxn0WfASr-VFAUDa7-sFnT9fnUUIcSsGvfJTRUUU bckFc2x0x2IEx4CE42xK8VAvwI8IcIk0rVWrJVCq3wA2ocxC64kIII0Yj41l84x0c7CEw4 AK67xGY2AK021l84ACjcxK6xIIjxv20xvE14v26F1j6w1UM28EF7xvwVC0I7IYx2IY6xkF 7I0E14v26F4j6r4UJwA2z4x0Y4vEx4A2jsIE14v26r4UJVWxJr1l84ACjcxK6I8E87Iv6x kF7I0E14v26F4UJVW0owAaw2AFwI0_JF0_Jw1le2I262IYc4CY6c8Ij28IcVAaY2xG8wAq jxCEc2xF0cIa020Ex4CE44I27wAqx4xG64xvF2IEw4CE5I8CrVC2j2WlYx0E74AGY7Cv6c x26rWlOx8S6xCaFVCjc4AY6r1j6r4UM4x0Y48IcxkI7VAKI48JMxkF7I0En4kS14v26r12 6r1DMxAIw28IcxkI7VAKI48JMxAIw28IcVCjz48v1sIEY20_WwCFx2IqxVCFs4IE7xkEbV WUJVW8JwCFI7km07C267AKxVWUAVWUtwC20s026c02F40E14v26r1j6r18MI8I3I0E7480 Y4vE14v26r106r1rMI8E67AF67kF1VAFwI0_Jw0_GFylIxkGc2Ij64vIr41lIxAIcVC0I7 IYx2IY67AKxVW5JVW7JwCI42IY6xIIjxv20xvEc7CjxVAFwI0_Gr0_Cr1lIxAIcVCF04k2 6cxKx2IYs7xG6r1j6r1xMIIF0xvEx4A2jsIE14v26r4j6F4UMIIF0xvEx4A2jsIEc7CjxV AFwI0_Gr0_Gr1UYxBIdaVFxhVjvjDU0xZFpf9x0zR9iSdUUUUU= X-Spam-Status: No, score=-1.9 required=5.0 tests=BAYES_00,SPF_HELO_PASS, SPF_PASS,T_SCC_BODY_TEXT_LINE autolearn=ham autolearn_force=no version=3.4.6 X-Spam-Checker-Version: SpamAssassin 3.4.6 (2021-04-09) on lindbergh.monkeyblade.net Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org X-getmail-retrieved-from-mailbox: =?utf-8?q?INBOX?= X-GMAIL-THRID: =?utf-8?q?1763416493442660236?= X-GMAIL-MSGID: =?utf-8?q?1763416493442660236?= Implement kvm hardware enable, disable interface, setting the guest config register to enable virtualization features when called the interface. Signed-off-by: Tianrui Zhao --- arch/loongarch/kvm/main.c | 63 +++++++++++++++++++++++++++++++++++++++ 1 file changed, 63 insertions(+) diff --git a/arch/loongarch/kvm/main.c b/arch/loongarch/kvm/main.c index 59b93512cb99..dca6ae878a7f 100644 --- a/arch/loongarch/kvm/main.c +++ b/arch/loongarch/kvm/main.c @@ -189,6 +189,69 @@ static void _kvm_init_gcsr_flag(void) set_gcsr_sw_flag(LOONGARCH_CSR_PERFCNTR3); } +void kvm_init_vmcs(struct kvm *kvm) +{ + kvm->arch.vmcs = vmcs; +} + +long kvm_arch_dev_ioctl(struct file *filp, + unsigned int ioctl, unsigned long arg) +{ + return -ENOIOCTLCMD; +} + +#ifdef CONFIG_KVM_GENERIC_HARDWARE_ENABLING +int kvm_arch_hardware_enable(void) +{ + unsigned long gcfg = 0; + + /* First init gtlbc, gcfg, gstat, gintc. All guest use the same config */ + clear_csr_gtlbc(CSR_GTLBC_USETGID | CSR_GTLBC_TOTI); + write_csr_gcfg(0); + write_csr_gstat(0); + write_csr_gintc(0); + + /* + * Enable virtualization features granting guest direct control of + * certain features: + * GCI=2: Trap on init or unimplement cache instruction. + * TORU=0: Trap on Root Unimplement. + * CACTRL=1: Root control cache. + * TOP=0: Trap on Previlege. + * TOE=0: Trap on Exception. + * TIT=0: Trap on Timer. + */ + if (cpu_has_gcip_all) + gcfg |= CSR_GCFG_GCI_SECURE; + if (cpu_has_matc_root) + gcfg |= CSR_GCFG_MATC_ROOT; + + gcfg |= CSR_GCFG_TIT; + write_csr_gcfg(gcfg); + + kvm_flush_tlb_all(); + + /* Enable using TGID */ + set_csr_gtlbc(CSR_GTLBC_USETGID); + kvm_debug("gtlbc:%llx gintc:%llx gstat:%llx gcfg:%llx", + read_csr_gtlbc(), read_csr_gintc(), + read_csr_gstat(), read_csr_gcfg()); + + return 0; +} + +void kvm_arch_hardware_disable(void) +{ + clear_csr_gtlbc(CSR_GTLBC_USETGID | CSR_GTLBC_TOTI); + write_csr_gcfg(0); + write_csr_gstat(0); + write_csr_gintc(0); + + /* Flush any remaining guest TLB entries */ + kvm_flush_tlb_all(); +} +#endif + static int kvm_loongarch_env_init(void) { struct kvm_context *context;