From patchwork Tue Oct 26 07:12:41 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Patchwork-Submitter: Alexander Graf X-Patchwork-Id: 12584125 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 mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 49FD2C433EF for ; Tue, 26 Oct 2021 08:08:16 +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 BA335610A0 for ; Tue, 26 Oct 2021 08:08:15 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.4.1 mail.kernel.org BA335610A0 Authentication-Results: mail.kernel.org; dmarc=none (p=none dis=none) header.from=csgraf.de Authentication-Results: mail.kernel.org; spf=pass smtp.mailfrom=nongnu.org Received: from localhost ([::1]:36942 helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1mfHVG-0004hG-Ru for qemu-devel@archiver.kernel.org; Tue, 26 Oct 2021 04:08:14 -0400 Received: from eggs.gnu.org ([2001:470:142:3::10]:57414) by lists.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1mfGdf-00045B-Qy for qemu-devel@nongnu.org; Tue, 26 Oct 2021 03:12:51 -0400 Received: from mail.csgraf.de ([85.25.223.15]:49104 helo=zulu616.server4you.de) by eggs.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1mfGdZ-0008O2-40 for qemu-devel@nongnu.org; Tue, 26 Oct 2021 03:12:49 -0400 Received: from localhost.localdomain (dynamic-077-007-071-240.77.7.pool.telefonica.de [77.7.71.240]) by csgraf.de (Postfix) with ESMTPSA id A8F486080126; Tue, 26 Oct 2021 09:12:42 +0200 (CEST) From: Alexander Graf To: Cameron Esfahani Subject: [PATCH v2] hvf: arm: Ignore cache operations on MMIO Date: Tue, 26 Oct 2021 09:12:41 +0200 Message-Id: <20211026071241.74889-1-agraf@csgraf.de> X-Mailer: git-send-email 2.30.1 (Apple Git-130) MIME-Version: 1.0 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: kettenis@openbsd.org, Richard Henderson , =?utf-8?q?Philippe_Mathieu-Daud=C3=A9?= , qemu-devel@nongnu.org, Roman Bolshakov , Paolo Bonzini Errors-To: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org Sender: "Qemu-devel" Apple's Hypervisor.Framework forwards cache operations as MMIO traps into user space. For MMIO however, these have no meaning: There is no cache attached to them. So let's just treat cache data exits as nops. This fixes OpenBSD booting as guest. Signed-off-by: Alexander Graf Reported-by: AJ Barris Reference: https://github.com/utmapp/UTM/issues/3197 Reviewed-by: Philippe Mathieu-Daudé Reviewed-by: Mark Kettenis Reviewed-by: Richard Henderson Reviewed-by: Richard Henderson --- target/arm/hvf/hvf.c | 7 +++++++ 1 file changed, 7 insertions(+) diff --git a/target/arm/hvf/hvf.c b/target/arm/hvf/hvf.c index bff3e0cde7..0dc96560d3 100644 --- a/target/arm/hvf/hvf.c +++ b/target/arm/hvf/hvf.c @@ -1150,12 +1150,19 @@ int hvf_vcpu_exec(CPUState *cpu) uint32_t sas = (syndrome >> 22) & 3; uint32_t len = 1 << sas; uint32_t srt = (syndrome >> 16) & 0x1f; + uint32_t cm = (syndrome >> 8) & 0x1; uint64_t val = 0; trace_hvf_data_abort(env->pc, hvf_exit->exception.virtual_address, hvf_exit->exception.physical_address, isv, iswrite, s1ptw, len, srt); + if (cm) { + /* We don't cache MMIO regions */ + advance_pc = true; + break; + } + assert(isv); if (iswrite) {