From nobody Sun Sep 28 17:41:24 2025 Delivered-To: importer@patchew.org Authentication-Results: mx.zohomail.com; dkim=pass; spf=pass (zohomail.com: domain of gnu.org designates 209.51.188.17 as permitted sender) smtp.mailfrom=qemu-devel-bounces+importer=patchew.org@nongnu.org; dmarc=pass(p=quarantine dis=none) header.from=kernel.org ARC-Seal: i=1; a=rsa-sha256; t=1757592010; cv=none; d=zohomail.com; s=zohoarc; b=ZEHNOhybBRVkQ8jnrGh1MdFG6wuTv53ycFbhtn3Jv97m52STyoeNKUWx8a++AUsPDzxlZIOqXGQc+05TLU+JBAO1SoN6I1vomrrn2DPQbEa6ANITTy9QeD3xsAws7yXT5OqOdietewGc1DNpIIKscvQMev7PjULqkbX4MgRa+vQ= ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=zohomail.com; s=zohoarc; t=1757592010; h=Content-Transfer-Encoding:Cc:Cc:Date:Date:From:From:In-Reply-To:List-Subscribe:List-Post:List-Id:List-Archive:List-Help:List-Unsubscribe:MIME-Version:Message-ID:References:Sender:Subject:Subject:To:To:Message-Id:Reply-To; bh=ohVBxMSKepEIIKNU7xEsSZ0SDRfMDZ1Ubi8Z68NG9DI=; b=cbSKKUKGGpAkHGhmmoBSskUEIZ3YNpGCN9lN0ydA7UjvNZn4xBJq+6hnY6dMQsBPZOji7cmsH2T4Zd8p/HhhD655eL9S8DBXJUjL56RX6zaJbCs7SqhmaEcBAyfEVnypmVt57DpWJWBKDWZEh++dNI3Vefgt3TawNonkFYeZ1k0= ARC-Authentication-Results: i=1; mx.zohomail.com; dkim=pass; spf=pass (zohomail.com: domain of gnu.org designates 209.51.188.17 as permitted sender) smtp.mailfrom=qemu-devel-bounces+importer=patchew.org@nongnu.org; dmarc=pass header.from= (p=quarantine dis=none) Return-Path: Received: from lists.gnu.org (lists.gnu.org [209.51.188.17]) by mx.zohomail.com with SMTPS id 1757592009962830.4564196667218; Thu, 11 Sep 2025 05:00:09 -0700 (PDT) Received: from localhost ([::1] helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1uwfwG-0002Nh-HZ; Thu, 11 Sep 2025 07:58:08 -0400 Received: from eggs.gnu.org ([2001:470:142:3::10]) by lists.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1uwfwE-0002Mh-UF for qemu-devel@nongnu.org; Thu, 11 Sep 2025 07:58:06 -0400 Received: from sea.source.kernel.org ([2600:3c0a:e001:78e:0:1991:8:25]) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1uwfwA-0006O2-CK for qemu-devel@nongnu.org; Thu, 11 Sep 2025 07:58:06 -0400 Received: from smtp.kernel.org (transwarp.subspace.kernel.org [100.75.92.58]) by sea.source.kernel.org (Postfix) with ESMTP id 6D3FD41A00; Thu, 11 Sep 2025 11:57:57 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id 92B73C4CEF0; Thu, 11 Sep 2025 11:57:55 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1757591877; bh=7HOJXed/grVIwqxVnBC0UOQowTK5L/FCl7Cie6uBUm4=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=T1ntO9aEo82Qc78/YNeyI6LSQHMMSt10UyA//C2B2KcD0FLcWLj18okAIoyxhZ4LM sxbA1oBVssrhDk6VCVyEh/Q75omSlQw04GBqJzB9ZyLsXdeh8u3yLFaGo0ixvV+tW+ k2uRaFFE0EIcOeGLjf3PT/NY8NyJBaZcFNfqeQjGBziSs217O57pipb+fZpjanrYFL MdJKEqA+FvP3sgqZKdnzSDuChWOP3DvsnY8ixHeRohuWXmc1J1M/S+8ccp9H3m738D rPNQ6KWdsAEcPSCcWKJRoxdDIPZxQWaICJ/aEFwvjPmy0qZHrB8CSfw1U3TWtTD6nk MDpIinpFepTIw== From: "Naveen N Rao (AMD)" To: Paolo Bonzini , Sean Christopherson Cc: qemu-devel , , "Daniel P. Berrange" , Eduardo Habkost , Eric Blake , Markus Armbruster , Marcelo Tosatti , Zhao Liu , Nikunj A Dadhania , Tom Lendacky , Michael Roth , Neeraj Upadhyay , Roy Hopkins Subject: [RFC PATCH 7/7] target/i386: SEV: Add support for enabling Secure AVIC SEV feature Date: Thu, 11 Sep 2025 17:24:26 +0530 Message-ID: <632eaad0ef28943520a1285c8efb3d8a756e4624.1757589490.git.naveen@kernel.org> X-Mailer: git-send-email 2.50.1 In-Reply-To: References: MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable Received-SPF: pass (zohomail.com: domain of gnu.org designates 209.51.188.17 as permitted sender) client-ip=209.51.188.17; envelope-from=qemu-devel-bounces+importer=patchew.org@nongnu.org; helo=lists.gnu.org; Received-SPF: pass client-ip=2600:3c0a:e001:78e:0:1991:8:25; envelope-from=naveen@kernel.org; helo=sea.source.kernel.org X-Spam_score_int: -20 X-Spam_score: -2.1 X-Spam_bar: -- X-Spam_report: (-2.1 / 5.0 requ) BAYES_00=-1.9, DKIMWL_WL_HIGH=-0.001, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, DKIM_VALID_EF=-0.1, SPF_HELO_NONE=0.001, SPF_PASS=-0.001 autolearn=ham autolearn_force=no X-Spam_action: no action X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: qemu-devel-bounces+importer=patchew.org@nongnu.org Sender: qemu-devel-bounces+importer=patchew.org@nongnu.org X-ZohoMail-DKIM: pass (identity @kernel.org) X-ZM-MESSAGEID: 1757592012441116600 Content-Type: text/plain; charset="utf-8" Add support for enabling Secure AVIC VMSA SEV feature in SEV-SNP guests through a new "secure-avic" boolean property on SEV-SNP guest objects. Sample command-line: -machine q35,confidential-guest-support=3Dsev0 \ -object sev-snp-guest,id=3Dsev0,cbitpos=3D51,reduced-phys-bits=3D1,secure= -avic=3Don Reviewed-by: Nikunj A Dadhania Signed-off-by: Naveen N Rao (AMD) --- target/i386/sev.h | 1 + target/i386/sev.c | 13 +++++++++++++ qapi/qom.json | 5 ++++- 3 files changed, 18 insertions(+), 1 deletion(-) diff --git a/target/i386/sev.h b/target/i386/sev.h index 87e73034ad15..a374c144bccd 100644 --- a/target/i386/sev.h +++ b/target/i386/sev.h @@ -47,6 +47,7 @@ bool sev_snp_enabled(void); #define SVM_SEV_FEAT_SNP_ACTIVE BIT(0) #define SVM_SEV_FEAT_DEBUG_SWAP BIT(5) #define SVM_SEV_FEAT_SECURE_TSC BIT(9) +#define SVM_SEV_FEAT_SECURE_AVIC BIT(16) =20 typedef struct SevKernelLoaderContext { char *setup_data; diff --git a/target/i386/sev.c b/target/i386/sev.c index facf51c810d9..f9170e21ca57 100644 --- a/target/i386/sev.c +++ b/target/i386/sev.c @@ -3147,6 +3147,16 @@ static void sev_snp_guest_set_secure_tsc(Object *obj= , bool value, Error **errp) sev_set_feature(SEV_COMMON(obj), SVM_SEV_FEAT_SECURE_TSC, value); } =20 +static bool sev_snp_guest_get_secure_avic(Object *obj, Error **errp) +{ + return is_sev_feature_set(SEV_COMMON(obj), SVM_SEV_FEAT_SECURE_AVIC); +} + +static void sev_snp_guest_set_secure_avic(Object *obj, bool value, Error *= *errp) +{ + sev_set_feature(SEV_COMMON(obj), SVM_SEV_FEAT_SECURE_AVIC, value); +} + static void sev_snp_guest_get_tsc_frequency(Object *obj, Visitor *v, const char *name, void *opaque, Error **errp) @@ -3210,6 +3220,9 @@ sev_snp_guest_class_init(ObjectClass *oc, const void = *data) object_class_property_add(oc, "tsc-frequency", "uint32", sev_snp_guest_get_tsc_frequency, sev_snp_guest_set_tsc_frequency, NULL, NULL); + object_class_property_add_bool(oc, "secure-avic", + sev_snp_guest_get_secure_avic, + sev_snp_guest_set_secure_avic); } =20 static void diff --git a/qapi/qom.json b/qapi/qom.json index 5b99148cb790..5dce560a2f54 100644 --- a/qapi/qom.json +++ b/qapi/qom.json @@ -1105,6 +1105,8 @@ # @tsc-frequency: set secure TSC frequency. Only valid if Secure TSC # is enabled (default: zero) (since 10.2) # +# @secure-avic: enable Secure AVIC (default: false) (since 10.2) +# # Since: 9.1 ## { 'struct': 'SevSnpGuestProperties', @@ -1118,7 +1120,8 @@ '*host-data': 'str', '*vcek-disabled': 'bool', '*secure-tsc': 'bool', - '*tsc-frequency': 'uint32' } } + '*tsc-frequency': 'uint32', + '*secure-avic': 'bool' } } =20 ## # @TdxGuestProperties: --=20 2.50.1