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[2620:137:e000::1:20]) by mx.google.com with ESMTP id x13-20020a056a000bcd00b0068795f00991si1287601pfu.101.2023.08.18.04.08.51; Fri, 18 Aug 2023 04:09:04 -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 S1351322AbjHQNBG (ORCPT + 99 others); Thu, 17 Aug 2023 09:01:06 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:40418 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1351136AbjHQNAn (ORCPT ); Thu, 17 Aug 2023 09:00:43 -0400 Received: from mail.loongson.cn (mail.loongson.cn [114.242.206.163]) by lindbergh.monkeyblade.net (Postfix) with ESMTP id 180EA30CA; Thu, 17 Aug 2023 06:00:39 -0700 (PDT) Received: from loongson.cn (unknown [10.2.5.185]) by gateway (Coremail) with SMTP id _____8CxruvQGd5ksIYZAA--.49871S3; Thu, 17 Aug 2023 21:00:00 +0800 (CST) Received: from localhost.localdomain (unknown [10.2.5.185]) by localhost.localdomain (Coremail) with SMTP id AQAAf8BxniPIGd5kmchcAA--.55665S28; Thu, 17 Aug 2023 21:00:00 +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 26/30] LoongArch: KVM: Implement kvm exception vector Date: Thu, 17 Aug 2023 20:59:47 +0800 Message-Id: <20230817125951.1126909-27-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--.55665S28 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: 1774564875644363154 X-GMAIL-MSGID: 1774564875644363154 Implement kvm exception vector, using _kvm_fault_tables array to save the handle function pointer and it is used when vcpu handle exit. Reviewed-by: Bibo Mao Signed-off-by: Tianrui Zhao --- arch/loongarch/kvm/exit.c | 46 +++++++++++++++++++++++++++++++++++++++ 1 file changed, 46 insertions(+) diff --git a/arch/loongarch/kvm/exit.c b/arch/loongarch/kvm/exit.c index f9c7951261e6..a6df2b56edb0 100644 --- a/arch/loongarch/kvm/exit.c +++ b/arch/loongarch/kvm/exit.c @@ -654,3 +654,49 @@ static int _kvm_handle_fpu_disabled(struct kvm_vcpu *vcpu) kvm_own_fpu(vcpu); return RESUME_GUEST; } + +/* + * Loongarch KVM callback handling for not implemented guest exiting + */ +static int _kvm_fault_ni(struct kvm_vcpu *vcpu) +{ + unsigned long estat, badv; + unsigned int exccode, inst; + + /* + * Fetch the instruction. + */ + badv = vcpu->arch.badv; + estat = vcpu->arch.host_estat; + exccode = (estat & CSR_ESTAT_EXC) >> CSR_ESTAT_EXC_SHIFT; + inst = vcpu->arch.badi; + kvm_err("Exccode: %d PC=%#lx inst=0x%08x BadVaddr=%#lx estat=%#lx\n", + exccode, vcpu->arch.pc, inst, badv, read_gcsr_estat()); + kvm_arch_vcpu_dump_regs(vcpu); + vcpu->run->exit_reason = KVM_EXIT_INTERNAL_ERROR; + + return RESUME_HOST; +} + +static exit_handle_fn _kvm_fault_tables[EXCCODE_INT_START] = { + [EXCCODE_TLBL] = _kvm_handle_read_fault, + [EXCCODE_TLBI] = _kvm_handle_read_fault, + [EXCCODE_TLBS] = _kvm_handle_write_fault, + [EXCCODE_TLBM] = _kvm_handle_write_fault, + [EXCCODE_FPDIS] = _kvm_handle_fpu_disabled, + [EXCCODE_GSPR] = _kvm_handle_gspr, +}; + +void _kvm_init_fault(void) +{ + int i; + + for (i = 0; i < EXCCODE_INT_START; i++) + if (!_kvm_fault_tables[i]) + _kvm_fault_tables[i] = _kvm_fault_ni; +} + +int _kvm_handle_fault(struct kvm_vcpu *vcpu, int fault) +{ + return _kvm_fault_tables[fault](vcpu); +}