From nobody Thu Sep 11 14:14:20 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 0A477C64ED6 for ; Mon, 20 Feb 2023 06:57:46 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S230332AbjBTG5p (ORCPT ); Mon, 20 Feb 2023 01:57:45 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:35278 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S229479AbjBTG5m (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 EE10B1041C; Sun, 19 Feb 2023 22:57:38 -0800 (PST) Received: from loongson.cn (unknown [10.2.5.185]) by gateway (Coremail) with SMTP id _____8CxxtjhGfNjKLQCAA--.57S3; 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--.34690S5; 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 03/29] LoongArch: KVM: Implement kvm hardware enable, disable interface Date: Mon, 20 Feb 2023 14:57:09 +0800 Message-Id: <20230220065735.1282809-4-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: quoted-printable X-CM-TRANSID: AQAAf8Ax+73fGfNjFvk2AA--.34690S5 X-CM-SenderInfo: p2kd03xldq233l6o00pqjv00gofq/ X-Coremail-Antispam: 1Uk129KBjvJXoW7Ar4DJF18ur15trW7GFyUZFb_yoW8tFy3pr 4UAFW5Ary5Jr1agF93J3Z5tr13WrWvgayxXa12va45Xw4j9rs5ZF95Kr9rJFyUW3yUGr1S v390yF9agF1DArUanT9S1TB71UUUUjJqnTZGkaVYY2UrUUUUj1kv1TuYvTs0mT0YCTnIWj qI5I8CrVACY4xI64kE6c02F40Ex7xfYxn0WfASr-VFAUDa7-sFnT9fnUUIcSsGvfJTRUUU bckFc2x0x2IEx4CE42xK8VAvwI8IcIk0rVWrJVCq3wA2ocxC64kIII0Yj41l84x0c7CEw4 AK67xGY2AK021l84ACjcxK6xIIjxv20xvE14v26F1j6w1UM28EF7xvwVC0I7IYx2IY6xkF 7I0E14v26F4j6r4UJwA2z4x0Y4vEx4A2jsIE14v26r4UJVWxJr1l84ACjcxK6I8E87Iv6x kF7I0E14v26F4UJVW0owAaw2AFwI0_JF0_Jw1le2I262IYc4CY6c8Ij28IcVAaY2xG8wAq jxCEc2xF0cIa020Ex4CE44I27wAqx4xG64xvF2IEw4CE5I8CrVC2j2WlYx0E74AGY7Cv6c x26rWlOx8S6xCaFVCjc4AY6r1j6r4UM4x0Y48IcxkI7VAKI48JMxkF7I0En4kS14v26r12 6r1DMxAIw28IcxkI7VAKI48JMxAIw28IcVCjz48v1sIEY20_WwCFx2IqxVCFs4IE7xkEbV WUJVW8JwCFI7km07C267AKxVWUAVWUtwC20s026c02F40E14v26r1j6r18MI8I3I0E7480 Y4vE14v26r106r1rMI8E67AF67kF1VAFwI0_Jw0_GFylIxkGc2Ij64vIr41lIxAIcVC0I7 IYx2IY67AKxVW7JVWDJwCI42IY6xIIjxv20xvEc7CjxVAFwI0_Gr0_Cr1lIxAIcVCF04k2 6cxKx2IYs7xG6r1j6r1xMIIF0xvEx4A2jsIE14v26r4j6F4UMIIF0xvEx4A2jsIEc7CjxV AFwI0_Gr0_Gr1UYxBIdaVFxhVjvjDU0xZFpf9x0zR9iSdUUUUU= Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Type: text/plain; charset="utf-8" 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 | 71 +++++++++++++++++++++++++++++++++++++++ 1 file changed, 71 insertions(+) diff --git a/arch/loongarch/kvm/main.c b/arch/loongarch/kvm/main.c index d7969d02a..6afd97823 100644 --- a/arch/loongarch/kvm/main.c +++ b/arch/loongarch/kvm/main.c @@ -11,6 +11,77 @@ =20 static struct kvm_context __percpu *vmcs; =20 +void kvm_init_vmcs(struct kvm *kvm) +{ + kvm->arch.vmcs =3D vmcs; +} + +long kvm_arch_dev_ioctl(struct file *filp, + unsigned int ioctl, unsigned long arg) +{ + return -ENOIOCTLCMD; +} + +int kvm_arch_check_processor_compat(void *opaque) +{ + return 0; +} + +int kvm_arch_hardware_setup(void *opaque) +{ + return 0; +} + +int kvm_arch_hardware_enable(void) +{ + unsigned long gcfg =3D 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=3D2: Trap on init or unimplement cache instruction. + * TORU=3D0: Trap on Root Unimplement. + * CACTRL=3D1: Root control cache. + * TOP=3D0: Trap on Previlege. + * TOE=3D0: Trap on Exception. + * TIT=3D0: Trap on Timer. + */ + if (cpu_has_gcip_all) + gcfg |=3D CSR_GCFG_GCI_SECURE; + if (cpu_has_matc_root) + gcfg |=3D CSR_GCFG_MATC_ROOT; + + gcfg |=3D 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(); +} + int kvm_arch_init(void *opaque) { struct kvm_context *context; --=20 2.31.1