From mboxrd@z Thu Jan 1 00:00:00 1970 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 84688C77B70 for ; Tue, 4 Apr 2023 09:01:14 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S234165AbjDDJBN (ORCPT ); Tue, 4 Apr 2023 05:01:13 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:38080 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S233809AbjDDJBL (ORCPT ); Tue, 4 Apr 2023 05:01:11 -0400 Received: from linux.microsoft.com (linux.microsoft.com [13.77.154.182]) by lindbergh.monkeyblade.net (Postfix) with ESMTP id 12E1710EA; Tue, 4 Apr 2023 02:01:09 -0700 (PDT) Received: from linuxonhyperv3.guj3yctzbm1etfxqx2vob5hsef.xx.internal.cloudapp.net (linux.microsoft.com [13.77.154.182]) by linux.microsoft.com (Postfix) with ESMTPSA id 5CFFE210DD92; Tue, 4 Apr 2023 02:01:09 -0700 (PDT) DKIM-Filter: OpenDKIM Filter v2.11.0 linux.microsoft.com 5CFFE210DD92 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linux.microsoft.com; s=default; t=1680598869; bh=ZJSNDxHuoCpxuFP6EwKcvSgo1VZVW6Qhmfhsxpz/kw8=; h=From:To:Subject:Date:In-Reply-To:References:From; b=qEkczgNLHrbA3o4tZ+Z2OJTojDuZCgYBbC4JUHLVLlm9IEDH/xDJaOOiAFH5w/7uA 8RKrcuhqYvQcMR/0bSt3NtXGYOuggo2pdnvscFehVu8M8zkwZNGGolVa66zPHtnram OllAPOZgFB2eTgPPFoaMwU52Xbi4uBfhLqcTRxlk= From: Saurabh Sengar To: tglx@linutronix.de, mingo@redhat.com, bp@alien8.de, dave.hansen@linux.intel.com, x86@kernel.org, hpa@zytor.com, kys@microsoft.com, haiyangz@microsoft.com, wei.liu@kernel.org, decui@microsoft.com, arnd@arndb.de, tiala@microsoft.com, mikelley@microsoft.com, linux-kernel@vger.kernel.org, linux-hyperv@vger.kernel.org, linux-arch@vger.kernel.org, jgross@suse.com, mat.jonczyk@o2.pl Subject: [PATCH v4 4/5] Drivers: hv: Kconfig: Add HYPERV_VTL_MODE Date: Tue, 4 Apr 2023 02:01:03 -0700 Message-Id: <1680598864-16981-5-git-send-email-ssengar@linux.microsoft.com> X-Mailer: git-send-email 1.8.3.1 In-Reply-To: <1680598864-16981-1-git-send-email-ssengar@linux.microsoft.com> References: <1680598864-16981-1-git-send-email-ssengar@linux.microsoft.com> Precedence: bulk List-ID: X-Mailing-List: linux-arch@vger.kernel.org Add HYPERV_VTL_MODE Kconfig flag for VTL mode. Signed-off-by: Saurabh Sengar --- drivers/hv/Kconfig | 24 ++++++++++++++++++++++++ 1 file changed, 24 insertions(+) diff --git a/drivers/hv/Kconfig b/drivers/hv/Kconfig index 0747a8f1fcee..511f2e012c59 100644 --- a/drivers/hv/Kconfig +++ b/drivers/hv/Kconfig @@ -13,6 +13,30 @@ config HYPERV Select this option to run Linux as a Hyper-V client operating system. +config HYPERV_VTL_MODE + bool "Enable Linux to boot in VTL context" + depends on X86_64 && HYPERV + default n + help + Virtual Secure Mode (VSM) is a set of hypervisor capabilities and + enlightenments offered to host and guest partitions which enables + the creation and management of new security boundaries within + operating system software. + + VSM achieves and maintains isolation through Virtual Trust Levels + (VTLs). Virtual Trust Levels are hierarchical, with higher levels + being more privileged than lower levels. VTL0 is the least privileged + level, and currently only other level supported is VTL2. + + Select this option to build a Linux kernel to run at a VTL other than + the normal VTL0, which currently is only VTL2. This option + initializes the x86 platform for VTL2, and adds the ability to boot + secondary CPUs directly into 64-bit context as required for VTLs other + than 0. A kernel built with this option must run at VTL2, and will + not run as a normal guest. + + If unsure, say N + config HYPERV_TIMER def_bool HYPERV && X86 -- 2.34.1