From patchwork Mon Apr 25 13:50:51 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Patchwork-Submitter: Gerd Hoffmann X-Patchwork-Id: 12825799 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.gnu.org (lists.gnu.org [209.51.188.17]) (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 F2779C433F5 for ; Mon, 25 Apr 2022 13:55:14 +0000 (UTC) Received: from localhost ([::1]:58858 helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1nizBJ-0004bu-VQ for qemu-devel@archiver.kernel.org; Mon, 25 Apr 2022 09:55:13 -0400 Received: from eggs.gnu.org ([2001:470:142:3::10]:56590) by lists.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1niz7s-0008MJ-7n for qemu-devel@nongnu.org; Mon, 25 Apr 2022 09:51:40 -0400 Received: from us-smtp-delivery-124.mimecast.com ([170.10.129.124]:29407) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1niz7q-0007wd-MR for qemu-devel@nongnu.org; Mon, 25 Apr 2022 09:51:39 -0400 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1650894698; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version:content-type:content-type: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references; bh=4/js2hftkW0mBPeilZgfgdW7zMW7qg97j1C/Jrk74TY=; b=VqjL2H58/SNIigBMdR6GmvJIYF559RY4wFWpOUNQKqaMM4ERRFTTt2HWwWGkWBt6lvW3CT Ms9rkIYMx5k6tklD7gk0q0Ho34mROFH5D2qpB6lTbbUeVhk6FTq1O5YsB/9+tkF06rR0uC sB6oZp9H9HAeIpx4F4aFe6vg7ydVHRg= Received: from mimecast-mx02.redhat.com (mx3-rdu2.redhat.com [66.187.233.73]) by relay.mimecast.com with ESMTP with STARTTLS (version=TLSv1.2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id us-mta-1-tvCHwimXPimJp8Xm5j66Lg-1; Mon, 25 Apr 2022 09:51:33 -0400 X-MC-Unique: tvCHwimXPimJp8Xm5j66Lg-1 Received: from smtp.corp.redhat.com (int-mx03.intmail.prod.int.rdu2.redhat.com [10.11.54.3]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by mimecast-mx02.redhat.com (Postfix) with ESMTPS id 0F09429AA3B7; Mon, 25 Apr 2022 13:51:33 +0000 (UTC) Received: from sirius.home.kraxel.org (unknown [10.39.192.9]) by smtp.corp.redhat.com (Postfix) with ESMTPS id 20A14111E411; Mon, 25 Apr 2022 13:51:03 +0000 (UTC) Received: by sirius.home.kraxel.org (Postfix, from userid 1000) id 4D1F41800624; Mon, 25 Apr 2022 15:50:51 +0200 (CEST) From: Gerd Hoffmann To: qemu-devel@nongnu.org Subject: [PATCH v2 3/3] i386: firmware parsing and sev setup for -bios loaded firmware Date: Mon, 25 Apr 2022 15:50:51 +0200 Message-Id: <20220425135051.551037-4-kraxel@redhat.com> In-Reply-To: <20220425135051.551037-1-kraxel@redhat.com> References: <20220425135051.551037-1-kraxel@redhat.com> MIME-Version: 1.0 X-Scanned-By: MIMEDefang 2.78 on 10.11.54.3 Received-SPF: pass client-ip=170.10.129.124; envelope-from=kraxel@redhat.com; helo=us-smtp-delivery-124.mimecast.com X-Spam_score_int: -28 X-Spam_score: -2.9 X-Spam_bar: -- X-Spam_report: (-2.9 / 5.0 requ) BAYES_00=-1.9, DKIMWL_WL_HIGH=-0.082, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, DKIM_VALID_EF=-0.1, RCVD_IN_DNSWL_LOW=-0.7, SPF_HELO_NONE=0.001, SPF_PASS=-0.001, T_SCC_BODY_TEXT_LINE=-0.01 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: , Cc: Eduardo Habkost , =?utf-8?q?Daniel_P_=2E_Berrang?= =?utf-8?q?=C3=A9?= , "Michael S. Tsirkin" , Xiaoyao Li , Richard Henderson , =?utf-8?q?Philippe_Mathie?= =?utf-8?q?u-Daud=C3=A9?= , Gerd Hoffmann , Paolo Bonzini Errors-To: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org Sender: "Qemu-devel" Don't register firmware as rom, not needed (see comment). Add x86_firmware_configure() call for proper sev initialization. Signed-off-by: Gerd Hoffmann Tested-by: Xiaoyao Li Reviewed-by: Daniel P. Berrangé Tested-by: Daniel P. Berrangé Reviewed-by: Philippe Mathieu-Daudé Acked-by: Michael S. Tsirkin --- hw/i386/x86.c | 25 +++++++++++++++++++------ 1 file changed, 19 insertions(+), 6 deletions(-) diff --git a/hw/i386/x86.c b/hw/i386/x86.c index ced31f67b9a8..79ebdface6e2 100644 --- a/hw/i386/x86.c +++ b/hw/i386/x86.c @@ -1115,12 +1115,25 @@ void x86_bios_rom_init(MachineState *ms, const char *default_firmware, } bios = g_malloc(sizeof(*bios)); memory_region_init_ram(bios, NULL, "pc.bios", bios_size, &error_fatal); - if (!isapc_ram_fw) { - memory_region_set_readonly(bios, true); - } - ret = rom_add_file_fixed(bios_name, (uint32_t)(-bios_size), -1); - if (ret != 0) { - goto bios_error; + if (sev_enabled()) { + /* + * The concept of a "reset" simply doesn't exist for + * confidential computing guests, we have to destroy and + * re-launch them instead. So there is no need to register + * the firmware as rom to properly re-initialize on reset. + * Just go for a straight file load instead. + */ + void *ptr = memory_region_get_ram_ptr(bios); + load_image_size(filename, ptr, bios_size); + x86_firmware_configure(ptr, bios_size); + } else { + if (!isapc_ram_fw) { + memory_region_set_readonly(bios, true); + } + ret = rom_add_file_fixed(bios_name, (uint32_t)(-bios_size), -1); + if (ret != 0) { + goto bios_error; + } } g_free(filename);