From patchwork Tue Mar 28 12:31:16 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: zhaotianrui X-Patchwork-Id: 13191000 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 870DCC6FD18 for ; Tue, 28 Mar 2023 12:32:10 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S232888AbjC1McH (ORCPT ); Tue, 28 Mar 2023 08:32:07 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:35592 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S232630AbjC1Mbu (ORCPT ); Tue, 28 Mar 2023 08:31:50 -0400 Received: from loongson.cn (mail.loongson.cn [114.242.206.163]) by lindbergh.monkeyblade.net (Postfix) with ESMTP id 5F95C9010; Tue, 28 Mar 2023 05:31:32 -0700 (PDT) Received: from loongson.cn (unknown [10.2.5.185]) by gateway (Coremail) with SMTP id _____8Cxxtge3iJkqhkTAA--.29154S3; Tue, 28 Mar 2023 20:31:26 +0800 (CST) Received: from localhost.localdomain (unknown [10.2.5.185]) by localhost.localdomain (Coremail) with SMTP id AQAAf8CxPL4X3iJku2cPAA--.12046S28; Tue, 28 Mar 2023 20:31:26 +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: [PING PATCH v4 26/29] LoongArch: KVM: Implement kvm exception vector Date: Tue, 28 Mar 2023 20:31:16 +0800 Message-Id: <20230328123119.3649361-27-zhaotianrui@loongson.cn> X-Mailer: git-send-email 2.31.1 In-Reply-To: <20230328123119.3649361-1-zhaotianrui@loongson.cn> References: <20230328123119.3649361-1-zhaotianrui@loongson.cn> MIME-Version: 1.0 X-CM-TRANSID: AQAAf8CxPL4X3iJku2cPAA--.12046S28 X-CM-SenderInfo: p2kd03xldq233l6o00pqjv00gofq/ X-Coremail-Antispam: 1Uk129KBjvJXoW7Kw15tF1UurWUKF17uF4UJwb_yoW8ZFW8pF yfA34Yyr48W342ya4akw1vgF13AayxKr17WrW7G345uw4jqryrtrWkK397JF43KryrZF1x JFZ8tFn8uF4UG37anT9S1TB71UUUUjJqnTZGkaVYY2UrUUUUj1kv1TuYvTs0mT0YCTnIWj qI5I8CrVACY4xI64kE6c02F40Ex7xfYxn0WfASr-VFAUDa7-sFnT9fnUUIcSsGvfJTRUUU b4AFc2x0x2IEx4CE42xK8VAvwI8IcIk0rVWrJVCq3wA2ocxC64kIII0Yj41l84x0c7CEw4 AK67xGY2AK021l84ACjcxK6xIIjxv20xvE14v26w1j6s0DM28EF7xvwVC0I7IYx2IY6xkF 7I0E14v26r4UJVWxJr1l84ACjcxK6I8E87Iv67AKxVWxJr0_GcWl84ACjcxK6I8E87Iv6x kF7I0E14v26F4UJVW0owAaw2AFwI0_JF0_Jw1le2I262IYc4CY6c8Ij28IcVAaY2xG8wAq jxCEc2xF0cIa020Ex4CE44I27wAqx4xG64xvF2IEw4CE5I8CrVC2j2WlYx0E74AGY7Cv6c x26rWlOx8S6xCaFVCjc4AY6r1j6r4UM4x0Y48IcxkI7VAKI48JMxkF7I0En4kS14v26r12 6r1DMxAIw28IcxkI7VAKI48JMxAIw28IcVCjz48v1sIEY20_WwCFx2IqxVCFs4IE7xkEbV WUJVW8JwCFI7km07C267AKxVWUAVWUtwC20s026c02F40E14v26r1j6r18MI8I3I0E7480 Y4vE14v26r106r1rMI8E67AF67kF1VAFwI0_Jw0_GFylIxkGc2Ij64vIr41lIxAIcVC0I7 IYx2IY67AKxVWDJVCq3wCI42IY6xIIjxv20xvEc7CjxVAFwI0_Gr1j6F4UJwCI42IY6xAI w20EY4v20xvaj40_Jr0_JF4lIxAIcVC2z280aVAFwI0_Gr1j6F4UJwCI42IY6I8E87Iv6x kF7I0E14v26r4UJVWxJrUvcSsGvfC2KfnxnUUI43ZEXa7xRiTKZJUUUUU== Precedence: bulk List-ID: X-Mailing-List: kvm@vger.kernel.org Implement kvm exception vector, using _kvm_fault_tables array to save the handle function pointer and it is used when vcpu handle exit. Signed-off-by: Tianrui Zhao --- arch/loongarch/kvm/exit.c | 48 +++++++++++++++++++++++++++++++++++++++ 1 file changed, 48 insertions(+) diff --git a/arch/loongarch/kvm/exit.c b/arch/loongarch/kvm/exit.c index fc2152e09..1f95189f6 100644 --- a/arch/loongarch/kvm/exit.c +++ b/arch/loongarch/kvm/exit.c @@ -651,3 +651,51 @@ 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=%#llx\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_TLBNR] = _kvm_handle_read_fault, + [EXCCODE_TLBNX] = _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, +}; + +int _kvm_handle_fault(struct kvm_vcpu *vcpu, int fault) +{ + return _kvm_fault_tables[fault](vcpu); +} + +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; +}