From patchwork Mon Feb 20 06:57:31 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: zhaotianrui X-Patchwork-Id: 59286 Return-Path: Delivered-To: ouuuleilei@gmail.com Received: by 2002:adf:eb09:0:0:0:0:0 with SMTP id s9csp1167313wrn; Sun, 19 Feb 2023 23:02:42 -0800 (PST) X-Google-Smtp-Source: AK7set+OYikzJGYEo7FZZJ/8MmxcNjK0RvPQeTNk04ZEs8GATf9aBOYdYZZh3tDvjuVAXfMEr2hw X-Received: by 2002:a05:6a20:728c:b0:bf:488a:1da8 with SMTP id o12-20020a056a20728c00b000bf488a1da8mr17327578pzk.3.1676876562171; Sun, 19 Feb 2023 23:02:42 -0800 (PST) ARC-Seal: i=1; a=rsa-sha256; t=1676876562; cv=none; d=google.com; s=arc-20160816; b=EsuRUGSz5g97kuf1mQgBAAK/ZDWAbggqk2dm7QYup3aVfy+YQeQegac/ZI22XeJ2BC lRYOu0pvXA/uBVUfgkbT2Jhye7Pq4oSFe68IfvNpc4aHDD+7IUYWVsVPDyjLFrBhk8xd sjRjbreEmbvxko0yafGNkcNZfMYq1oZvw/f+6hf6T94TUQjm0weluqinIvXexwJj6grM Qiwft0Ih/7HRM8TQPgI5t50bzKRXbwHGQipTSUl0choEYuS4bNqEZME+27tcibAaj2fq 675dmBg/yUZGKohwBqnfuQascqd4/07z91albs2hsEf4TXUTHkmlu+hT9lC2e00E+sny qwbg== ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=arc-20160816; h=list-id:precedence:content-transfer-encoding:mime-version :references:in-reply-to:message-id:date:subject:cc:to:from; bh=sBajucdtqV5fmmbTtcYinA1OuMxRL3FL1UAbFK06xXI=; b=CbYHjFQHDzGQ6uTXBHMTmOasnDuDhJOKc4jlT6gJe522+JyvgV0ETUr1+Go6RSvEJe J38oHta42B7FVlPFwcWWgLKCjx7yUM1q+QsKv0EmIZLhPeSq5FidLJaVz/89W7XYiTCv 31dvRhX/lAhu1enHH6ZmxuLcD+U1gMZxdGL1PwVqSapEzcXqEirB0hy/bxG3pamzjCC6 KnCZWYehu8g4ajnplPr2J73YXvCYcQTBDP6VGaDq9/p9ruiiykJ0hbpH4o5YtYU1knT1 mkyoxcMk5OOAZUkJlvFoNy6OpTQW4//Hpfp12MqgjzmpQAZ1AI3QNbl1h29vNJNVqoXk Wmxw== ARC-Authentication-Results: i=1; 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: from out1.vger.email (out1.vger.email. [2620:137:e000::1:20]) by mx.google.com with ESMTP id p15-20020a634f4f000000b004fbd746d0f1si803933pgl.564.2023.02.19.23.02.28; Sun, 19 Feb 2023 23:02:42 -0800 (PST) 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 S230511AbjBTG6d (ORCPT + 99 others); Mon, 20 Feb 2023 01:58:33 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:35738 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S230383AbjBTG5u (ORCPT ); Mon, 20 Feb 2023 01:57:50 -0500 Received: from loongson.cn (mail.loongson.cn [114.242.206.163]) by lindbergh.monkeyblade.net (Postfix) with ESMTP id F1CEED536; Sun, 19 Feb 2023 22:57:46 -0800 (PST) Received: from loongson.cn (unknown [10.2.5.185]) by gateway (Coremail) with SMTP id _____8BxYU_pGfNjCLUCAA--.85S3; Mon, 20 Feb 2023 14:57:45 +0800 (CST) Received: from localhost.localdomain (unknown [10.2.5.185]) by localhost.localdomain (Coremail) with SMTP id AQAAf8Ax+73fGfNjFvk2AA--.34690S27; Mon, 20 Feb 2023 14:57:44 +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 25/29] LoongArch: KVM: Implement handle fpu exception Date: Mon, 20 Feb 2023 14:57:31 +0800 Message-Id: <20230220065735.1282809-26-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 X-CM-TRANSID: AQAAf8Ax+73fGfNjFvk2AA--.34690S27 X-CM-SenderInfo: p2kd03xldq233l6o00pqjv00gofq/ X-Coremail-Antispam: 1Uk129KBjvJXoW7tF45ur4xuFW7KFWUtF47Arb_yoW8Gr18pF WfZwnY9r48Wry7ta9Iy3Wqqr43CrZ5Kry7WrZFk345Zw4Uta4rXF48KrWvgFy5tr1rXa1S qr13KFn8uF1UA3DanT9S1TB71UUUUjJqnTZGkaVYY2UrUUUUj1kv1TuYvTs0mT0YCTnIWj 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== X-Spam-Status: No, score=-1.9 required=5.0 tests=BAYES_00,SPF_HELO_PASS, 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: =?utf-8?q?INBOX?= X-GMAIL-THRID: =?utf-8?q?1758332518146268853?= X-GMAIL-MSGID: =?utf-8?q?1758332518146268853?= Implement handle fpu exception, using kvm_own_fpu to enable fpu for guest. Signed-off-by: Tianrui Zhao --- arch/loongarch/kvm/exit.c | 27 +++++++++++++++++++++++++++ 1 file changed, 27 insertions(+) diff --git a/arch/loongarch/kvm/exit.c b/arch/loongarch/kvm/exit.c index 30e64ba72..89c90faa1 100644 --- a/arch/loongarch/kvm/exit.c +++ b/arch/loongarch/kvm/exit.c @@ -625,3 +625,30 @@ static int _kvm_handle_read_fault(struct kvm_vcpu *vcpu) { return _kvm_handle_mmu_fault(vcpu, false); } + +/** + * _kvm_handle_fpu_disabled() - Guest used fpu however it is disabled at host + * @vcpu: Virtual CPU context. + * + * Handle when the guest attempts to use fpu which hasn't been allowed + * by the root context. + */ +static int _kvm_handle_fpu_disabled(struct kvm_vcpu *vcpu) +{ + struct kvm_run *run = vcpu->run; + + /* + * If guest FPU not present, the FPU operation should have been + * treated as a reserved instruction! + * If FPU already in use, we shouldn't get this at all. + */ + if (WARN_ON(!_kvm_guest_has_fpu(&vcpu->arch) || + vcpu->arch.aux_inuse & KVM_LARCH_FPU)) { + kvm_err("%s internal error\n", __func__); + run->exit_reason = KVM_EXIT_INTERNAL_ERROR; + return RESUME_HOST; + } + + kvm_own_fpu(vcpu); + return RESUME_GUEST; +}