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 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 E5A09C433F5 for ; Wed, 19 Jan 2022 09:36:56 +0000 (UTC) Received: from localhost ([::1]:49270 helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1nA7Oh-0004Yn-GT for qemu-devel@archiver.kernel.org; Wed, 19 Jan 2022 04:36:55 -0500 Received: from eggs.gnu.org ([209.51.188.92]:44378) by lists.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1nA77k-00015L-Pr for qemu-devel@nongnu.org; Wed, 19 Jan 2022 04:19:24 -0500 Received: from us-smtp-delivery-124.mimecast.com ([170.10.133.124]:43189) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1nA77i-0004Rf-Eb for qemu-devel@nongnu.org; Wed, 19 Jan 2022 04:19:24 -0500 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1642583960; 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=KRth5A7ZY1rraPda/lem+YXIkoeKbm5GfxgPjFReZXQ=; b=GfbIciMWacC6+SbKFHx8g3q5VzvBadv3CXEiIjULzsgfxOVrQMUcA2hkm6I4MrV8hVpzOT ALIVQ+m6HU/1b1qLvpu/skIZpNeCsh1+TUjLX7s0KRXC+35REDBCbTPD29XTuQcbV9tHOb IXOSKQpd50AZTsh3an+LvA/FoOCL5FM= Received: from mail-wm1-f70.google.com (mail-wm1-f70.google.com [209.85.128.70]) by relay.mimecast.com with ESMTP with STARTTLS (version=TLSv1.2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id us-mta-264-2r3zw9xYMbeQKub26ygHwA-1; Wed, 19 Jan 2022 04:19:16 -0500 X-MC-Unique: 2r3zw9xYMbeQKub26ygHwA-1 Received: by mail-wm1-f70.google.com with SMTP id n13-20020a05600c3b8d00b0034979b7e200so897432wms.4 for ; Wed, 19 Jan 2022 01:19:15 -0800 (PST) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20210112; h=x-gm-message-state:date:from:to:cc:subject:message-id:references :mime-version:content-disposition:content-transfer-encoding :in-reply-to; bh=KRth5A7ZY1rraPda/lem+YXIkoeKbm5GfxgPjFReZXQ=; b=QZZsdRCA494s1xVXbDRjNsMNr5bMavr3Ybqn1+x/FnO+1Aj1SOGXgI46LQabOnTBUg 5rO+ElZcdSbK+Gpii6Ur57REIboqS1nEHtdMVDSIlqlnz9HrnwUnk/m6Be8kjdbnkaYX frxIiFPxKl22uPX0gnKAgTrKTPjxmNrzWgKBeoNgZ3U4wuZCZYtw5mbGpq2LVUeLmrLx WBm1DsQWGnZfVmnJ3tEQ6kg77TURVdJmj9SnMnd+68ta9qruyi6GF0mBni6mNphcqJQC RWPTN5huoNsubrijF+pl1+FDDwO2bRGjl/uxME/SqYNfFY5QWP62rvBgEpnHIuCSnX7h xNTQ== X-Gm-Message-State: AOAM531wuoGmiOO+ettBA3+gGMsCrj9+ivyZOK0rDsYZxstEfptQQjWO J+WtgLsRP4ajZpE5wpB4KjwFcOSmAcGIONtHjrvjeA0Z/OhBqTG50dKg3EM8scBLsYmNKdzY1o2 l6nsixZ+RmRUm+Ag= X-Received: by 2002:a05:600c:4e15:: with SMTP id b21mr2600574wmq.59.1642583954321; Wed, 19 Jan 2022 01:19:14 -0800 (PST) X-Google-Smtp-Source: ABdhPJwG0q8RDeuYwkDXzA8EmmCH0zOJ5Uz0WMA2akNgymcUlydqlOPoxasCAFJxH8TQznAXTiZGvQ== X-Received: by 2002:a05:600c:4e15:: with SMTP id b21mr2600542wmq.59.1642583954031; Wed, 19 Jan 2022 01:19:14 -0800 (PST) Received: from redhat.com ([2a10:8008:4454:0:bb37:a05d:7459:8682]) by smtp.gmail.com with ESMTPSA id n5sm4577556wmc.47.2022.01.19.01.19.12 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Wed, 19 Jan 2022 01:19:13 -0800 (PST) Date: Wed, 19 Jan 2022 04:19:10 -0500 From: "Michael S. Tsirkin" To: BALATON Zoltan Subject: Re: [PATCH] hw/acpi: Set memory regions to native endian as a work around Message-ID: <20220119041842-mutt-send-email-mst@kernel.org> References: <20211108130934.59B48748F52@zero.eik.bme.hu> MIME-Version: 1.0 In-Reply-To: Authentication-Results: relay.mimecast.com; auth=pass smtp.auth=CUSA124A263 smtp.mailfrom=mst@redhat.com X-Mimecast-Spam-Score: 0 X-Mimecast-Originator: redhat.com Content-Type: text/plain; charset=iso-8859-1 Content-Disposition: inline Content-Transfer-Encoding: 8bit Received-SPF: pass client-ip=170.10.133.124; envelope-from=mst@redhat.com; helo=us-smtp-delivery-124.mimecast.com X-Spam_score_int: -34 X-Spam_score: -3.5 X-Spam_bar: --- X-Spam_report: (-3.5 / 5.0 requ) BAYES_00=-1.9, DKIMWL_WL_HIGH=-0.7, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, DKIM_VALID_EF=-0.1, RCVD_IN_DNSWL_LOW=-0.7, RCVD_IN_MSPIKE_H3=0.001, RCVD_IN_MSPIKE_WL=0.001, 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: 2.1.29 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: Paolo Bonzini , qemu-devel@nongnu.org, Igor Mammedov Errors-To: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org Sender: "Qemu-devel" On Sat, Nov 13, 2021 at 07:47:20PM +0100, BALATON Zoltan wrote: > On Mon, 8 Nov 2021, BALATON Zoltan wrote: > > On Mon, 8 Nov 2021, Paolo Bonzini wrote: > > > On 11/8/21 15:30, Paolo Bonzini wrote: > > > > On 11/8/21 14:05, BALATON Zoltan wrote: > > > > > When using ACPI on big endian machine (such as ppc/pegasos2 which has > > > > > a VT8231 south bridge with ACPI) writes to ACPI registers come out > > > > > byte swapped. This may be caused by a bug in memory subsystem but > > > > > until that is fixed setting the ACPI memory regions to native endian > > > > > makes it usable for big endian machines. This fixes ACPI shutdown with > > > > > pegasos2 when using the board firmware for now. > > > > > This could be reverted when the memory layer is fixed. > > > > > > > > What is the path to the swapped writes?  Even just a backtrace > > > > might be enough to understand what's going on, and especially > > > > where the bug is. > > > > > > Ok, Michael pointed me at https://lore.kernel.org/all/20211011080528-mutt-send-email-mst@kernel.org/. > > Ping? I haven't seen an alternative fix yet. If you don't have time now this > could be postponed to next version with the native endian work around for > now. > > Regards, > BALATON Zoltan Paolo, ping? > > I was about to say that here's the original thread: > > > > https://lists.nongnu.org/archive/html/qemu-devel/2021-10/msg01972.html > > > > and here's the backtrace: > > > > #0 acpi_pm1_cnt_write (val=40, ar=0x55555695f340) at ../hw/acpi/core.c:556 > > #1 acpi_pm_cnt_write (opaque=0x55555695f340, addr=1, val=40, width=2) > > at ../hw/acpi/core.c:602 > > #2 0x0000555555b3a82f in memory_region_write_accessor > > (mr=mr@entry=0x55555695f590, addr=1, > > value=value@entry=0x7fffefffdd08, size=size@entry=2, shift= > out>, mask=mask@entry=65535, attrs=...) > > at ../softmmu/memory.c:492 > > #3 0x0000555555b3813e in access_with_adjusted_size > > (addr=addr@entry=1, value=value@entry=0x7fffefffdd08, > > size=size@entry=1, access_size_min=, > > access_size_max=, access_fn= > > 0x555555b3a7b0 , mr=0x55555695f590, > > attrs=...) at ../softmmu/memory.c:554 > > #4 0x0000555555b3c449 in memory_region_dispatch_write > > (mr=mr@entry=0x55555695f590, addr=1, data=, op= > out>, attrs=attrs@entry=...) > > at ../softmmu/memory.c:1511 > > #5 0x0000555555b2c121 in flatview_write_continue > > (fv=fv@entry=0x7fff84d23b30, addr=addr@entry=4261416709, > > attrs=attrs@entry=..., ptr=ptr@entry=0x7fffefffdec0, len=len@entry=1, > > addr1=, > > l=, mr=0x55555695f590) at host-utils.h:165 > > #6 0x0000555555b2c399 in flatview_write (len=1, buf=0x7fffefffdec0, > > attrs=..., addr=4261416709, fv=0x7fff84d23b30) at > > ../softmmu/physmem.c:2822 > > #7 subpage_write (opaque=, addr=, > > value=, len=1, attrs=...) at ../softmmu/physmem.c:2488 > > #8 0x0000555555b380de in access_with_adjusted_size > > (addr=addr@entry=3845, value=value@entry=0x7fffefffdf88, > > size=size@entry=1, access_size_min=, > > access_size_max=, access_fn= > > 0x555555b3aa80 , > > mr=0x7fff84710bb0, attrs=...) at ../softmmu/memory.c:549 > > #9 0x0000555555b3c449 in memory_region_dispatch_write > > (mr=mr@entry=0x7fff84710bb0, addr=addr@entry=3845, data=, > > data@entry=40, op=op@entry=MO_8, attrs=...) > > at ../softmmu/memory.c:1511 > > #10 0x0000555555c07b4c in io_writex > > (env=env@entry=0x55555666a820, > > iotlbentry=iotlbentry@entry=0x7fff843367f0, mmu_idx=1, val=val@entry=40, > > addr=addr@entry=4261416709, > > retaddr=retaddr@entry=140736116523268, op=MO_8) at > > ../accel/tcg/cputlb.c:1420 > > #11 0x0000555555c0b5df in store_helper (op=MO_8, retaddr= > out>, oi=, val=40, addr=4261416709, env=0x55555666a820) > > at ../accel/tcg/cputlb.c:2355 > > #12 full_stb_mmu (env=0x55555666a820, addr=4261416709, val=40, > > oi=, retaddr=140736116523268) at > > ../accel/tcg/cputlb.c:2404 > > #13 0x00007fffae3b8104 in code_gen_buffer () > > #14 0x0000555555bfcfab in cpu_tb_exec (cpu=cpu@entry=0x555556661360, > > itb=itb@entry=0x7fffae3b7fc0 , > > tb_exit=tb_exit@entry=0x7fffefffe668) > > at ../accel/tcg/cpu-exec.c:357 > > #15 0x0000555555bfe089 in cpu_loop_exec_tb (tb_exit=0x7fffefffe668, > > last_tb=, tb=0x7fffae3b7fc0 > > , cpu=0x555556661360) > > at ../accel/tcg/cpu-exec.c:833 > > #16 cpu_exec (cpu=cpu@entry=0x555556661360) at ../accel/tcg/cpu-exec.c:992 > > #17 0x0000555555c1bba0 in tcg_cpus_exec (cpu=cpu@entry=0x555556661360) > > at ../accel/tcg/tcg-accel-ops.c:67 > > #18 0x0000555555c1c3d7 in rr_cpu_thread_fn > > (arg=arg@entry=0x555556661360) at ../accel/tcg/tcg-accel-ops-rr.c:214 > > #19 0x0000555555d5c049 in qemu_thread_start (args=0x7fffefffe750) at > > ../util/qemu-thread-posix.c:556 > > #20 0x00007ffff6a95dea in start_thread () at /lib64/libpthread.so.0 > > #21 0x00007ffff69c8fdf in clone () at /lib64/libc.so.6 > >