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[2620:137:e000::1:20]) by mx.google.com with ESMTP id kb14-20020a170903338e00b001b89bfd0c2csi12709789plb.647.2023.08.17.07.47.56; Thu, 17 Aug 2023 07:48:33 -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 S1351191AbjHQNA2 (ORCPT + 99 others); Thu, 17 Aug 2023 09:00:28 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:45710 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1351094AbjHQNAG (ORCPT ); Thu, 17 Aug 2023 09:00:06 -0400 Received: from mail.loongson.cn (mail.loongson.cn [114.242.206.163]) by lindbergh.monkeyblade.net (Postfix) with ESMTP id 87B1530D3; Thu, 17 Aug 2023 06:00:00 -0700 (PDT) Received: from loongson.cn (unknown [10.2.5.185]) by gateway (Coremail) with SMTP id _____8DxRvHMGd5k+4UZAA--.52427S3; Thu, 17 Aug 2023 20:59:56 +0800 (CST) Received: from localhost.localdomain (unknown [10.2.5.185]) by localhost.localdomain (Coremail) with SMTP id AQAAf8BxniPIGd5kmchcAA--.55665S10; Thu, 17 Aug 2023 20:59:56 +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 v19 08/30] LoongArch: KVM: Implement vcpu handle exit interface Date: Thu, 17 Aug 2023 20:59:29 +0800 Message-Id: <20230817125951.1126909-9-zhaotianrui@loongson.cn> X-Mailer: git-send-email 2.39.1 In-Reply-To: <20230817125951.1126909-1-zhaotianrui@loongson.cn> References: <20230817125951.1126909-1-zhaotianrui@loongson.cn> MIME-Version: 1.0 X-CM-TRANSID: AQAAf8BxniPIGd5kmchcAA--.55665S10 X-CM-SenderInfo: p2kd03xldq233l6o00pqjv00gofq/ X-Coremail-Antispam: 1Uk129KBjDUn29KB7ZKAUJUUUUU529EdanIXcx71UUUUU7KY7 ZEXasCq-sGcSsGvfJ3UbIjqfuFe4nvWSU5nxnvy29KBjDU0xBIdaVrnUUvcSsGvfC2Kfnx nUUI43ZEXa7xR_UUUUUUUUU== X-Spam-Status: No, score=-1.9 required=5.0 tests=BAYES_00, RCVD_IN_DNSWL_BLOCKED,SPF_HELO_NONE,SPF_PASS 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: INBOX X-GMAIL-THRID: 1774488086897264801 X-GMAIL-MSGID: 1774488086897264801 Implement vcpu handle exit interface, getting the exit code by ESTAT register and using kvm exception vector to handle it. Reviewed-by: Bibo Mao Signed-off-by: Tianrui Zhao --- arch/loongarch/kvm/vcpu.c | 41 +++++++++++++++++++++++++++++++++++++++ 1 file changed, 41 insertions(+) diff --git a/arch/loongarch/kvm/vcpu.c b/arch/loongarch/kvm/vcpu.c index 83f2988ea67b..ca4e8d074e6c 100644 --- a/arch/loongarch/kvm/vcpu.c +++ b/arch/loongarch/kvm/vcpu.c @@ -103,6 +103,47 @@ static int kvm_pre_enter_guest(struct kvm_vcpu *vcpu) return ret; } +/* + * Return 1 for resume guest and "<= 0" for resume host. + */ +static int _kvm_handle_exit(struct kvm_run *run, struct kvm_vcpu *vcpu) +{ + unsigned long exst = vcpu->arch.host_estat; + u32 intr = exst & 0x1fff; /* ignore NMI */ + u32 exccode = (exst & CSR_ESTAT_EXC) >> CSR_ESTAT_EXC_SHIFT; + int ret = RESUME_GUEST; + + vcpu->mode = OUTSIDE_GUEST_MODE; + + /* Set a default exit reason */ + run->exit_reason = KVM_EXIT_UNKNOWN; + + guest_timing_exit_irqoff(); + guest_state_exit_irqoff(); + local_irq_enable(); + + trace_kvm_exit(vcpu, exccode); + if (exccode) { + ret = _kvm_handle_fault(vcpu, exccode); + } else { + WARN(!intr, "vm exiting with suspicious irq\n"); + ++vcpu->stat.int_exits; + } + + if (ret == RESUME_GUEST) + ret = kvm_pre_enter_guest(vcpu); + + if (ret != RESUME_GUEST) { + local_irq_disable(); + return ret; + } + + guest_timing_enter_irqoff(); + guest_state_enter_irqoff(); + trace_kvm_reenter(vcpu); + return RESUME_GUEST; +} + int kvm_arch_vcpu_create(struct kvm_vcpu *vcpu) { unsigned long timer_hz;