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 X-Spam-Level: X-Spam-Status: No, score=-13.8 required=3.0 tests=BAYES_00, HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_CR_TRAILER,INCLUDES_PATCH, MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS autolearn=unavailable autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 914D6C48BC2 for ; Wed, 23 Jun 2021 06:40:15 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 637926120D for ; Wed, 23 Jun 2021 06:40:15 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S229959AbhFWGmb (ORCPT ); Wed, 23 Jun 2021 02:42:31 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:37706 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S229801AbhFWGm3 (ORCPT ); Wed, 23 Jun 2021 02:42:29 -0400 Received: from theia.8bytes.org (8bytes.org [IPv6:2a01:238:4383:600:38bc:a715:4b6d:a889]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id C80A7C061574; Tue, 22 Jun 2021 23:40:12 -0700 (PDT) Received: by theia.8bytes.org (Postfix, from userid 1000) id 7BB9B3C2; Wed, 23 Jun 2021 08:40:08 +0200 (CEST) Date: Wed, 23 Jun 2021 08:40:00 +0200 From: Joerg Roedel To: x86@kernel.org Cc: Joerg Roedel , Brijesh Singh , Tom Lendacky , hpa@zytor.com, Andy Lutomirski , Dave Hansen , Peter Zijlstra , Jiri Slaby , Dan Williams , Juergen Gross , Kees Cook , David Rientjes , Cfir Cohen , Erdem Aktas , Masami Hiramatsu , Mike Stunes , Sean Christopherson , Martin Radev , Arvind Sankar , linux-coco@lists.linux.dev, linux-kernel@vger.kernel.org, kvm@vger.kernel.org, virtualization@lists.linux-foundation.org Subject: [PATCH 2/3] x86/sev: Add defines for GHCB version 2 MSR protocol requests Message-ID: References: <20210622144825.27588-1-joro@8bytes.org> <20210622144825.27588-3-joro@8bytes.org> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20210622144825.27588-3-joro@8bytes.org> Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org From: Brijesh Singh Add the necessary defines for supporting the GHCB version 2 protocol. This includes defines for: - MSR-based AP hlt request/response - Hypervisor Feature request/response This is the bare minimum of requests that need to be supported by a GHCB version 2 implementation. There are more requests in the specification, but those depend on Secure Nested Paging support being available. These defines are shared between SEV host and guest support, so they are submitted as an individual patch without users yet to avoid merge conflicts in the future. Signed-off-by: Brijesh Singh Signed-off-by: Tom Lendacky Co-developed-by: Tom Lendacky Signed-off-by: Joerg Roedel --- arch/x86/include/asm/sev-common.h | 15 +++++++++++++++ 1 file changed, 15 insertions(+) diff --git a/arch/x86/include/asm/sev-common.h b/arch/x86/include/asm/sev-common.h index 1cc9e7dd8107..9aa2f29b4c97 100644 --- a/arch/x86/include/asm/sev-common.h +++ b/arch/x86/include/asm/sev-common.h @@ -47,6 +47,21 @@ (((unsigned long)reg & GHCB_MSR_CPUID_REG_MASK) << GHCB_MSR_CPUID_REG_POS) | \ (((unsigned long)fn) << GHCB_MSR_CPUID_FUNC_POS)) +/* AP Reset Hold */ +#define GHCB_MSR_AP_RESET_HOLD_REQ 0x006 +#define GHCB_MSR_AP_RESET_HOLD_RESP 0x007 +#define GHCB_MSR_AP_RESET_HOLD_RESULT_POS 12 +#define GHCB_MSR_AP_RESET_HOLD_RESULT_MASK GENMASK_ULL(51, 0) + +/* GHCB Hypervisor Feature Request/Response */ +#define GHCB_MSR_HV_FT_REQ 0x080 +#define GHCB_MSR_HV_FT_RESP 0x081 +#define GHCB_MSR_HV_FT_POS 12 +#define GHCB_MSR_HV_FT_MASK GENMASK_ULL(51, 0) + +#define GHCB_MSR_HV_FT_RESP_VAL(v) \ + ((unsigned long)((v) >> GHCB_MSR_HV_FT_POS) & GHCB_MSR_HV_FT_MASK) + #define GHCB_MSR_TERM_REQ 0x100 #define GHCB_MSR_TERM_REASON_SET_POS 12 #define GHCB_MSR_TERM_REASON_SET_MASK 0xf -- 2.31.1