From patchwork Thu Aug 8 10:13:02 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Sergiy Kibrik X-Patchwork-Id: 13757199 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 lists.xenproject.org (lists.xenproject.org [192.237.175.120]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id 0226AC3DA4A for ; Thu, 8 Aug 2024 10:13:27 +0000 (UTC) Received: from list by lists.xenproject.org with outflank-mailman.773868.1184302 (Exim 4.92) (envelope-from ) id 1sc08w-000367-4s; Thu, 08 Aug 2024 10:13:14 +0000 X-Outflank-Mailman: Message body and most headers restored to incoming version Received: by outflank-mailman (output) from mailman id 773868.1184302; Thu, 08 Aug 2024 10:13:14 +0000 Received: from localhost ([127.0.0.1] helo=lists.xenproject.org) by lists.xenproject.org with esmtp (Exim 4.92) (envelope-from ) id 1sc08w-000360-2G; Thu, 08 Aug 2024 10:13:14 +0000 Received: by outflank-mailman (input) for mailman id 773868; Thu, 08 Aug 2024 10:13:13 +0000 Received: from se1-gles-sth1-in.inumbo.com ([159.253.27.254] helo=se1-gles-sth1.inumbo.com) by lists.xenproject.org with esmtp (Exim 4.92) (envelope-from ) id 1sc08v-00035t-2v for xen-devel@lists.xenproject.org; Thu, 08 Aug 2024 10:13:13 +0000 Received: from pb-smtp21.pobox.com (pb-smtp21.pobox.com [173.228.157.53]) by se1-gles-sth1.inumbo.com (Halon) with ESMTPS id d0d9b115-556e-11ef-bc04-fd08da9f4363; Thu, 08 Aug 2024 12:13:12 +0200 (CEST) Received: from pb-smtp21.pobox.com (unknown [127.0.0.1]) by pb-smtp21.pobox.com (Postfix) with ESMTP id 9574B31D25; Thu, 8 Aug 2024 06:13:10 -0400 (EDT) (envelope-from sakib@darkstar.site) Received: from pb-smtp21.sea.icgroup.com (unknown [127.0.0.1]) by pb-smtp21.pobox.com (Postfix) with ESMTP id 9008D31D24; Thu, 8 Aug 2024 06:13:10 -0400 (EDT) (envelope-from sakib@darkstar.site) Received: from localhost (unknown [185.130.54.64]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by pb-smtp21.pobox.com (Postfix) with ESMTPSA id 6257D31D1F; Thu, 8 Aug 2024 06:13:06 -0400 (EDT) (envelope-from sakib@darkstar.site) X-BeenThere: xen-devel@lists.xenproject.org List-Id: Xen developer discussion List-Unsubscribe: , List-Post: List-Help: List-Subscribe: , Errors-To: xen-devel-bounces@lists.xenproject.org Precedence: list Sender: "Xen-devel" X-Inumbo-ID: d0d9b115-556e-11ef-bc04-fd08da9f4363 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed; d=pobox.com; h=from:to:cc :subject:date:message-id:in-reply-to:references:mime-version :content-transfer-encoding; s=sasl; bh=sYeNlXd320jgCemX/nEWnRjUu eRsq3RVfPj+4GsXNkw=; b=t3lazugoe7/x1qIZmwl8Npi/moFcbTxBNi/52MiGH r9nibkCsJnVLfUdmZJR8rr4zi6LDVLaDZuETm9o2q9uCd8sRdq9GgA5omZeaHmGa h1P4Q3HH9RLRxp/v2Cqq6czo8RRkrI6tU2QJgPn+lX1OkYoLfiIgcyTLrr4xgXTR fQ= From: Sergiy Kibrik To: xen-devel@lists.xenproject.org Cc: Xenia Ragiadakou , Jan Beulich , Andrew Cooper , =?utf-8?q?Roger_Pau_Monn=C3=A9?= , Stefano Stabellini , Xenia Ragiadakou , Sergiy Kibrik Subject: [XEN PATCH v6 3/3] x86/hvm: make AMD-V and Intel VT-x support configurable Date: Thu, 8 Aug 2024 13:13:02 +0300 Message-Id: X-Mailer: git-send-email 2.25.1 In-Reply-To: References: MIME-Version: 1.0 X-Pobox-Relay-ID: CE1762DA-556E-11EF-AE19-E92ED1CD468F-90055647!pb-smtp21.pobox.com From: Xenia Ragiadakou Provide the user with configuration control over the cpu virtualization support in Xen by making AMD_SVM and INTEL_VMX options user selectable. To preserve the current default behavior, both options depend on HVM and default to value of HVM. To prevent users from unknowingly disabling virtualization support, make the controls user selectable only if EXPERT is enabled. No functional change intended. Signed-off-by: Xenia Ragiadakou Signed-off-by: Sergiy Kibrik Reviewed-by: Stefano Stabellini Acked-by: Jan Beulich --- changes in v6: - "default y" instead of "default HVM" changes in v5: - change kconfig option name SVM/VMX -> AMD_SVM/INTEL_VMX changes in v3: - only tags added --- xen/arch/x86/Kconfig | 18 ++++++++++++++++-- 1 file changed, 16 insertions(+), 2 deletions(-) diff --git a/xen/arch/x86/Kconfig b/xen/arch/x86/Kconfig index 74e081c7bd..d0aaf359eb 100644 --- a/xen/arch/x86/Kconfig +++ b/xen/arch/x86/Kconfig @@ -123,11 +123,25 @@ config HVM If unsure, say Y. config AMD_SVM - def_bool HVM + bool "AMD-V" if EXPERT + depends on HVM + default y + help + Enables virtual machine extensions on platforms that implement the + AMD Virtualization Technology (AMD-V). + If your system includes a processor with AMD-V support, say Y. + If in doubt, say Y. config INTEL_VMX - def_bool HVM + bool "Intel VT-x" if EXPERT + depends on HVM + default y select ARCH_VCPU_IOREQ_COMPLETION + help + Enables virtual machine extensions on platforms that implement the + Intel Virtualization Technology (Intel VT-x). + If your system includes a processor with Intel VT-x support, say Y. + If in doubt, say Y. config XEN_SHSTK bool "Supervisor Shadow Stacks"