From patchwork Tue Dec 17 18:14:52 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Ivan Orlov X-Patchwork-Id: 852240 Received: from smtp-fw-6001.amazon.com (smtp-fw-6001.amazon.com [52.95.48.154]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 0F67E1F8919; Tue, 17 Dec 2024 18:15:12 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=52.95.48.154 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1734459315; cv=none; b=g7KTfIiQVQgnln0/V2ZxIMNcTcwUhg/SpOA5O919sHGZxpZn1Is2Yj/toXn0CKGnJwammE7xZu6SywMbPPbdFZYOAX0ZhswZUQEWJocYjun1Qi79OoTANZd9ugne02xsuddOsIB78HpHV8c0MogSgcakmgYhfmEWv53ObtXq8C0= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1734459315; c=relaxed/simple; bh=rc7JzmZN0U0cmazanc6cjPkftA8JqudgKFtX9XwF8+E=; h=From:To:CC:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version:Content-Type; b=qFyWpw3conTsjz/YdHyzh9TfhdMmXeM6ggdYoMA73E7kSdUoDcsOgCPpsR8evqVrdU1CCafY1AtulmkEqbF14f+REx5noGmZeyRZCj77Ci8Fy1pQoPNQiveEfLE4ABI1MhVxMMrMw7oCsj1FgH/S54CXmY96dzTAvGE8zc33xOo= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dmarc=pass (p=quarantine dis=none) header.from=amazon.com; spf=pass smtp.mailfrom=amazon.co.uk; dkim=pass (1024-bit key) header.d=amazon.com header.i=@amazon.com header.b=vYzcg8Xq; arc=none smtp.client-ip=52.95.48.154 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=quarantine dis=none) header.from=amazon.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=amazon.co.uk Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=amazon.com header.i=@amazon.com header.b="vYzcg8Xq" DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=amazon.com; i=@amazon.com; q=dns/txt; s=amazon201209; t=1734459312; x=1765995312; h=from:to:cc:subject:date:message-id:in-reply-to: references:mime-version:content-transfer-encoding; bh=4VN5aP9uPohUChbBXN+Eoyl7CFAbxwb756OR/RUx5rY=; b=vYzcg8XqrZcO2EnXMP1qeBKviPS3XqRzS3tgim1S8UiXE+LHSznIAmGT I/joBpzlHQdnRDLt6MBn9ChZBlM6y7hl0rje8VnKq/113CzgC15L5H1/M hJ6TnbRtXXzjA5iwGA95THP3fSTURgSLI5IodhWxqoyLmnni7jmI0pJpr I=; X-IronPort-AV: E=Sophos;i="6.12,242,1728950400"; d="scan'208";a="446604344" Received: from iad12-co-svc-p1-lb1-vlan2.amazon.com (HELO smtpout.prod.us-east-1.prod.farcaster.email.amazon.dev) ([10.43.8.2]) by smtp-border-fw-6001.iad6.amazon.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 17 Dec 2024 18:15:09 +0000 Received: from EX19MTAUEA002.ant.amazon.com [10.0.29.78:63567] by smtpin.naws.us-east-1.prod.farcaster.email.amazon.dev [10.0.24.38:2525] with esmtp (Farcaster) id 1c4b3b02-0951-4bdc-a6e8-edde075a77f7; Tue, 17 Dec 2024 18:15:09 +0000 (UTC) X-Farcaster-Flow-ID: 1c4b3b02-0951-4bdc-a6e8-edde075a77f7 Received: from EX19D008UEC003.ant.amazon.com (10.252.135.194) by EX19MTAUEA002.ant.amazon.com (10.252.134.9) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA) id 15.2.1258.39; Tue, 17 Dec 2024 18:15:09 +0000 Received: from EX19MTAUEC001.ant.amazon.com (10.252.135.222) by EX19D008UEC003.ant.amazon.com (10.252.135.194) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA) id 15.2.1258.39; Tue, 17 Dec 2024 18:15:08 +0000 Received: from email-imr-corp-prod-pdx-1box-2b-8c2c6aed.us-west-2.amazon.com (10.43.8.6) by mail-relay.amazon.com (10.252.135.200) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA) id 15.2.1258.39 via Frontend Transport; Tue, 17 Dec 2024 18:15:08 +0000 Received: from dev-dsk-iorlov-1b-d2eae488.eu-west-1.amazon.com (dev-dsk-iorlov-1b-d2eae488.eu-west-1.amazon.com [10.253.74.38]) by email-imr-corp-prod-pdx-1box-2b-8c2c6aed.us-west-2.amazon.com (Postfix) with ESMTPS id 1AAB4A0790; Tue, 17 Dec 2024 18:15:05 +0000 (UTC) From: Ivan Orlov To: , , , , , , CC: Ivan Orlov , , , , , , , , Subject: [PATCH v3 1/7] KVM: x86: Add function for vectoring error generation Date: Tue, 17 Dec 2024 18:14:52 +0000 Message-ID: <20241217181458.68690-2-iorlov@amazon.com> X-Mailer: git-send-email 2.40.1 In-Reply-To: <20241217181458.68690-1-iorlov@amazon.com> References: <20241217181458.68690-1-iorlov@amazon.com> Precedence: bulk X-Mailing-List: linux-kselftest@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Extract VMX code for unhandleable VM-Exit during vectoring into vendor-agnostic function so that boiler-plate code can be shared by SVM. Report an actual GPA for EPT misconfig or invalid GPA for any other exit code in internal.data[3]. Signed-off-by: Ivan Orlov --- V1 -> V2: - Return GPA for any exit reason, using reported GPA when it is valid or INVALID_GPA otherwise. - Rename the error preparation function - Fix indentation V2 -> V3: - Move 'gpa' declaration into block it is used in - Use 'if' instead of ternary operator when reporting GPA - Remove redundant cast arch/x86/include/asm/kvm_host.h | 2 ++ arch/x86/kvm/vmx/vmx.c | 17 +++++------------ arch/x86/kvm/x86.c | 22 ++++++++++++++++++++++ 3 files changed, 29 insertions(+), 12 deletions(-) diff --git a/arch/x86/include/asm/kvm_host.h b/arch/x86/include/asm/kvm_host.h index e159e44a6a1b..de8fb1ab230c 100644 --- a/arch/x86/include/asm/kvm_host.h +++ b/arch/x86/include/asm/kvm_host.h @@ -2062,6 +2062,8 @@ void __kvm_prepare_emulation_failure_exit(struct kvm_vcpu *vcpu, u64 *data, u8 ndata); void kvm_prepare_emulation_failure_exit(struct kvm_vcpu *vcpu); +void kvm_prepare_event_vectoring_exit(struct kvm_vcpu *vcpu, gpa_t gpa); + void kvm_enable_efer_bits(u64); bool kvm_valid_efer(struct kvm_vcpu *vcpu, u64 efer); int kvm_get_msr_with_filter(struct kvm_vcpu *vcpu, u32 index, u64 *data); diff --git a/arch/x86/kvm/vmx/vmx.c b/arch/x86/kvm/vmx/vmx.c index 893366e53732..acc2f0e0a339 100644 --- a/arch/x86/kvm/vmx/vmx.c +++ b/arch/x86/kvm/vmx/vmx.c @@ -6557,19 +6557,12 @@ static int __vmx_handle_exit(struct kvm_vcpu *vcpu, fastpath_t exit_fastpath) exit_reason.basic != EXIT_REASON_APIC_ACCESS && exit_reason.basic != EXIT_REASON_TASK_SWITCH && exit_reason.basic != EXIT_REASON_NOTIFY)) { - int ndata = 3; + gpa_t gpa = INVALID_GPA; - vcpu->run->exit_reason = KVM_EXIT_INTERNAL_ERROR; - vcpu->run->internal.suberror = KVM_INTERNAL_ERROR_DELIVERY_EV; - vcpu->run->internal.data[0] = vectoring_info; - vcpu->run->internal.data[1] = exit_reason.full; - vcpu->run->internal.data[2] = vmx_get_exit_qual(vcpu); - if (exit_reason.basic == EXIT_REASON_EPT_MISCONFIG) { - vcpu->run->internal.data[ndata++] = - vmcs_read64(GUEST_PHYSICAL_ADDRESS); - } - vcpu->run->internal.data[ndata++] = vcpu->arch.last_vmentry_cpu; - vcpu->run->internal.ndata = ndata; + if (exit_reason.basic == EXIT_REASON_EPT_MISCONFIG) + gpa = vmcs_read64(GUEST_PHYSICAL_ADDRESS); + + kvm_prepare_event_vectoring_exit(vcpu, gpa); return 0; } diff --git a/arch/x86/kvm/x86.c b/arch/x86/kvm/x86.c index 2e713480933a..7ce9cdb66f19 100644 --- a/arch/x86/kvm/x86.c +++ b/arch/x86/kvm/x86.c @@ -8813,6 +8813,28 @@ void kvm_prepare_emulation_failure_exit(struct kvm_vcpu *vcpu) } EXPORT_SYMBOL_GPL(kvm_prepare_emulation_failure_exit); +void kvm_prepare_event_vectoring_exit(struct kvm_vcpu *vcpu, gpa_t gpa) +{ + u32 reason, intr_info, error_code; + struct kvm_run *run = vcpu->run; + u64 info1, info2; + int ndata = 0; + + kvm_x86_call(get_exit_info)(vcpu, &reason, &info1, &info2, + &intr_info, &error_code); + + run->internal.data[ndata++] = info2; + run->internal.data[ndata++] = reason; + run->internal.data[ndata++] = info1; + run->internal.data[ndata++] = gpa; + run->internal.data[ndata++] = vcpu->arch.last_vmentry_cpu; + + run->exit_reason = KVM_EXIT_INTERNAL_ERROR; + run->internal.suberror = KVM_INTERNAL_ERROR_DELIVERY_EV; + run->internal.ndata = ndata; +} +EXPORT_SYMBOL_GPL(kvm_prepare_event_vectoring_exit); + static int handle_emulation_failure(struct kvm_vcpu *vcpu, int emulation_type) { struct kvm *kvm = vcpu->kvm;