From patchwork Fri Sep 15 01:49:23 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: zhaotianrui X-Patchwork-Id: 13386246 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 A5626EDE989 for ; Fri, 15 Sep 2023 01:50:04 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S231381AbjIOBuH (ORCPT ); Thu, 14 Sep 2023 21:50:07 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:53680 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S231322AbjIOBuC (ORCPT ); Thu, 14 Sep 2023 21:50:02 -0400 Received: from mail.loongson.cn (mail.loongson.cn [114.242.206.163]) by lindbergh.monkeyblade.net (Postfix) with ESMTP id 52B0B270A; Thu, 14 Sep 2023 18:49:57 -0700 (PDT) Received: from loongson.cn (unknown [10.2.5.185]) by gateway (Coremail) with SMTP id _____8BxXetDuANlif4nAA--.6266S3; Fri, 15 Sep 2023 09:49:55 +0800 (CST) Received: from localhost.localdomain (unknown [10.2.5.185]) by localhost.localdomain (Coremail) with SMTP id AQAAf8Axndw9uANl+ioGAA--.11927S5; Fri, 15 Sep 2023 09:49:54 +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 v21 03/29] LoongArch: KVM: Implement kvm hardware enable, disable interface Date: Fri, 15 Sep 2023 09:49:23 +0800 Message-Id: <20230915014949.1222777-4-zhaotianrui@loongson.cn> X-Mailer: git-send-email 2.39.1 In-Reply-To: <20230915014949.1222777-1-zhaotianrui@loongson.cn> References: <20230915014949.1222777-1-zhaotianrui@loongson.cn> MIME-Version: 1.0 X-CM-TRANSID: AQAAf8Axndw9uANl+ioGAA--.11927S5 X-CM-SenderInfo: p2kd03xldq233l6o00pqjv00gofq/ X-Coremail-Antispam: 1Uk129KBjDUn29KB7ZKAUJUUUUU529EdanIXcx71UUUUU7KY7 ZEXasCq-sGcSsGvfJ3UbIjqfuFe4nvWSU5nxnvy29KBjDU0xBIdaVrnUUvcSsGvfC2Kfnx nUUI43ZEXa7xR_UUUUUUUUU== Precedence: bulk List-ID: X-Mailing-List: kvm@vger.kernel.org Implement kvm hardware enable, disable interface, setting the guest config register to enable virtualization features when called the interface. Reviewed-by: Bibo Mao Signed-off-by: Tianrui Zhao --- arch/loongarch/kvm/main.c | 62 +++++++++++++++++++++++++++++++++++++++ 1 file changed, 62 insertions(+) diff --git a/arch/loongarch/kvm/main.c b/arch/loongarch/kvm/main.c index 0deb9273d8..fdbea0bc65 100644 --- a/arch/loongarch/kvm/main.c +++ b/arch/loongarch/kvm/main.c @@ -255,6 +255,68 @@ void kvm_check_vpid(struct kvm_vcpu *vcpu) change_csr_gstat(vpid_mask << CSR_GSTAT_GID_SHIFT, vpid); } +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; +} + +int kvm_arch_hardware_enable(void) +{ + unsigned long env, gcfg = 0; + + env = read_csr_gcfg(); + /* 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 (env & CSR_GCFG_GCIP_ALL) + gcfg |= CSR_GCFG_GCI_SECURE; + if (env & CSR_GCFG_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:%lx gintc:%lx gstat:%lx gcfg:%lx", + 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(); +} + static int kvm_loongarch_env_init(void) { struct kvm_context *context;