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=-16.7 required=3.0 tests=BAYES_00, HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_CR_TRAILER,INCLUDES_PATCH, MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED,USER_AGENT_GIT autolearn=ham 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 1FA2CC433B4 for ; Wed, 19 May 2021 20:34:58 +0000 (UTC) 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 mail.kernel.org (Postfix) with ESMTPS id BD409611C2 for ; Wed, 19 May 2021 20:34:57 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org BD409611C2 Authentication-Results: mail.kernel.org; dmarc=none (p=none dis=none) header.from=csgraf.de Authentication-Results: mail.kernel.org; spf=pass smtp.mailfrom=qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org Received: from localhost ([::1]:58066 helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1ljSu8-0004F6-Sz for qemu-devel@archiver.kernel.org; Wed, 19 May 2021 16:34:56 -0400 Received: from eggs.gnu.org ([2001:470:142:3::10]:53576) by lists.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1ljSjR-0005ZX-H2; Wed, 19 May 2021 16:23:54 -0400 Received: from mail.csgraf.de ([85.25.223.15]:48278 helo=zulu616.server4you.de) by eggs.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1ljSjO-0003JN-BC; Wed, 19 May 2021 16:23:53 -0400 Received: from localhost.localdomain (dynamic-095-114-039-201.95.114.pool.telefonica.de [95.114.39.201]) by csgraf.de (Postfix) with ESMTPSA id 4554260807AF; Wed, 19 May 2021 22:23:07 +0200 (CEST) From: Alexander Graf To: QEMU Developers Subject: [PATCH v8 19/19] hvf: arm: Handle Windows 10 SMC call Date: Wed, 19 May 2021 22:22:53 +0200 Message-Id: <20210519202253.76782-20-agraf@csgraf.de> X-Mailer: git-send-email 2.30.1 (Apple Git-130) In-Reply-To: <20210519202253.76782-1-agraf@csgraf.de> References: <20210519202253.76782-1-agraf@csgraf.de> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Received-SPF: pass client-ip=85.25.223.15; envelope-from=agraf@csgraf.de; helo=zulu616.server4you.de X-Spam_score_int: -18 X-Spam_score: -1.9 X-Spam_bar: - X-Spam_report: (-1.9 / 5.0 requ) BAYES_00=-1.9, SPF_HELO_NONE=0.001, SPF_PASS=-0.001 autolearn=ham autolearn_force=no X-Spam_action: no action X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.23 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: Peter Maydell , Eduardo Habkost , =?UTF-8?q?Philippe=20Mathieu-Daud=C3=A9?= , Richard Henderson , Cameron Esfahani , Roman Bolshakov , qemu-arm , Frank Yang , Paolo Bonzini , Peter Collingbourne Errors-To: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org Sender: "Qemu-devel" Windows 10 calls an SMCCC call via SMC unconditionally on boot. It lives in the trusted application call number space, but its purpose is unknown. In our current SMC implementation, we inject a UDEF for unknown SMC calls, including this one. However, Windows breaks on boot when we do this. Instead, let's return an error code. With this patch applied I can successfully boot the current Windows 10 Insider Preview in HVF. Signed-off-by: Alexander Graf --- v7 -> v8: - fix checkpatch --- target/arm/hvf/hvf.c | 4 ++++ 1 file changed, 4 insertions(+) diff --git a/target/arm/hvf/hvf.c b/target/arm/hvf/hvf.c index 65c33e2a14..be670af578 100644 --- a/target/arm/hvf/hvf.c +++ b/target/arm/hvf/hvf.c @@ -931,6 +931,10 @@ int hvf_vcpu_exec(CPUState *cpu) cpu_synchronize_state(cpu); if (!hvf_handle_psci_call(cpu)) { advance_pc = true; + } else if (env->xregs[0] == QEMU_SMCCC_TC_WINDOWS10_BOOT) { + /* This special SMC is called by Windows 10 on boot. Return error */ + env->xregs[0] = -1; + advance_pc = true; } else { trace_hvf_unknown_smc(env->xregs[0]); hvf_raise_exception(env, EXCP_UDEF, syn_uncategorized()); -- 2.30.1 (Apple Git-130)