Received: by 2002:a05:6a10:6744:0:0:0:0 with SMTP id w4csp5212943pxu; Wed, 21 Oct 2020 17:25:22 -0700 (PDT) X-Google-Smtp-Source: ABdhPJzowf1qOmseSyXK+wGCoV5pXNsGt5xoPj22FsehYLIMaAwWHlx7xSM5l0N9LcwdjFklJyXG X-Received: by 2002:a17:906:2987:: with SMTP id x7mr5908777eje.301.1603326321931; Wed, 21 Oct 2020 17:25:21 -0700 (PDT) ARC-Seal: i=1; a=rsa-sha256; t=1603326321; cv=none; d=google.com; s=arc-20160816; b=KvTRKddcZa08aC6OQ5lw6vB/rLYYu9AhYHNt8zEi3bBrEml710aDh/4IbhVqEOXd/P UrnsunuUiQNgIBlMdsCunha9qh1XNgLlCbdeGQWC6bZ7V5wpvrNVaKNJz3eKRTqq429E Nc+35jX5IHP26ovPKQNQ3wzlcyvT8rvTCc4HeWO2/F/b2BSXeFSYORZu07P7hqMinNOB Ez24vjSEbbQF1Le/JUrTJVfI2R9aaX5ER75UI/KrpTSbw+6vaYdF4T3VpVL6V7p1I/Q/ vomOZjOKo5LNRos7w219JA0yqOndJ0fNCVFmmncgdVnkBRh0bcGhjxvaWSvx5i/A0t6l WoWQ== ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=arc-20160816; h=list-id:precedence:content-transfer-encoding:mime-version :references:in-reply-to:message-id:date:subject:cc:to:from; bh=STVYqKhbzDn3cGd/IJ5Tg+v7LE9pGJh/uq256xhYZZA=; b=sa8tTQazWOGKFR1651i/u4uqpE8wiF/PZQoIFh2zZIwLpu8QCgojAIr+EV0VTnrriE CpgXtyYFP+JDiiNghC4e2Z6glUXdqrE/AztNwOYZBCkb/4LQEjR5fKkL50zeSVJP6hZw L/iK/w22yDNiSU9kQd22LBjr7WOUYg1v0CVCbWG56zSSlILhDrJu6K+h9RotK7FvaA8i xqFQODcpe+j0YXOxy5QqXhFiHE/DHUqqtMxwH4UaqHSoiZ4Y0sHbmWBldemEHS0i/T+m X5jRmJjozUzba0HE0nb4n/ePrIIdifd7Nyzsh1tfiZkdmaeK4Rrp3Gk/cAGoZntzr179 6dOA== ARC-Authentication-Results: i=1; mx.google.com; spf=pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 23.128.96.18 as permitted sender) smtp.mailfrom=linux-kernel-owner@vger.kernel.org; dmarc=fail (p=NONE sp=NONE dis=NONE) header.from=8bytes.org Return-Path: Received: from vger.kernel.org (vger.kernel.org. [23.128.96.18]) by mx.google.com with ESMTP id a9si2457895edv.66.2020.10.21.17.24.59; Wed, 21 Oct 2020 17:25:21 -0700 (PDT) Received-SPF: pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 23.128.96.18 as permitted sender) client-ip=23.128.96.18; Authentication-Results: mx.google.com; spf=pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 23.128.96.18 as permitted sender) smtp.mailfrom=linux-kernel-owner@vger.kernel.org; dmarc=fail (p=NONE sp=NONE dis=NONE) header.from=8bytes.org Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S2440696AbgJUMkH (ORCPT + 99 others); Wed, 21 Oct 2020 08:40:07 -0400 Received: from 8bytes.org ([81.169.241.247]:35536 "EHLO theia.8bytes.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S2407890AbgJUMkF (ORCPT ); Wed, 21 Oct 2020 08:40:05 -0400 Received: from cap.home.8bytes.org (p549add56.dip0.t-ipconnect.de [84.154.221.86]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits)) (No client certificate requested) by theia.8bytes.org (Postfix) with ESMTPSA id 3D4C3171; Wed, 21 Oct 2020 14:40:03 +0200 (CEST) From: Joerg Roedel To: x86@kernel.org Cc: Joerg Roedel , Joerg Roedel , Thomas Gleixner , Ingo Molnar , Borislav Petkov , "H. Peter Anvin" , Dave Hansen , Andy Lutomirski , Peter Zijlstra , Kees Cook , Arvind Sankar , Martin Radev , Tom Lendacky , linux-kernel@vger.kernel.org Subject: [PATCH v3 1/5] x86/boot/compressed/64: Introduce sev_status Date: Wed, 21 Oct 2020 14:39:34 +0200 Message-Id: <20201021123938.3696-2-joro@8bytes.org> X-Mailer: git-send-email 2.28.0 In-Reply-To: <20201021123938.3696-1-joro@8bytes.org> References: <20201021123938.3696-1-joro@8bytes.org> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org From: Joerg Roedel Introduce sev_status and initialize it together with sme_me_mask to have an indicator which SEV features are enabled. Signed-off-by: Joerg Roedel --- arch/x86/boot/compressed/mem_encrypt.S | 10 +++++++++- 1 file changed, 9 insertions(+), 1 deletion(-) diff --git a/arch/x86/boot/compressed/mem_encrypt.S b/arch/x86/boot/compressed/mem_encrypt.S index dd07e7b41b11..2192b3bd78d8 100644 --- a/arch/x86/boot/compressed/mem_encrypt.S +++ b/arch/x86/boot/compressed/mem_encrypt.S @@ -81,6 +81,13 @@ SYM_FUNC_START(set_sev_encryption_mask) bts %rax, sme_me_mask(%rip) /* Create the encryption mask */ + /* Read sev_status */ + movl $MSR_AMD64_SEV, %ecx + rdmsr + shlq $32, %rdx + orq %rdx, %rax + movq %rax, sev_status(%rip) + .Lno_sev_mask: movq %rbp, %rsp /* Restore original stack pointer */ @@ -96,5 +103,6 @@ SYM_FUNC_END(set_sev_encryption_mask) #ifdef CONFIG_AMD_MEM_ENCRYPT .balign 8 -SYM_DATA(sme_me_mask, .quad 0) +SYM_DATA(sme_me_mask, .quad 0) +SYM_DATA(sev_status, .quad 0) #endif -- 2.28.0