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[83.50.185.174]) by smtp.gmail.com with ESMTPSA id l8sm3195639ejo.197.2021.12.20.10.07.09 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Mon, 20 Dec 2021 10:07:09 -0800 (PST) Message-ID: Date: Mon, 20 Dec 2021 19:07:08 +0100 MIME-Version: 1.0 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:91.0) Gecko/20100101 Thunderbird/91.4.0 Subject: Re: [PATCH 00/15] ppc/ppc405: decade cleanup Content-Language: en-US To: =?UTF-8?Q?C=c3=a9dric_Le_Goater?= , Christophe Leroy , "qemu-ppc@nongnu.org" , "qemu-devel@nongnu.org" References: <20211206103712.1866296-1-clg@kaod.org> <880aa46a-97cb-ad79-b72e-f8276692d750@kaod.org> From: =?UTF-8?Q?Philippe_Mathieu-Daud=c3=a9?= In-Reply-To: Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit X-Host-Lookup-Failed: Reverse DNS lookup failed for 2a00:1450:4864:20::52c (failed) Received-SPF: pass client-ip=2a00:1450:4864:20::52c; envelope-from=philippe.mathieu.daude@gmail.com; helo=mail-ed1-x52c.google.com X-Spam_score_int: -42 X-Spam_score: -4.3 X-Spam_bar: ---- X-Spam_report: (-4.3 / 5.0 requ) BAYES_00=-1.9, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_EF=-0.1, FREEMAIL_FORGED_FROMDOMAIN=0.25, FREEMAIL_FROM=0.001, HEADER_FROM_DIFFERENT_DOMAINS=0.25, NICE_REPLY_A=-3.608, RCVD_IN_DNSWL_NONE=-0.0001, RDNS_NONE=0.793, 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: Thomas Huth , Daniel Henrique Barboza , Greg Kurz , David Gibson Errors-To: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org Sender: "Qemu-devel" On 12/20/21 09:33, Cédric Le Goater wrote: >> >> Don't know if this is the reason of our problems but I think there is >> something to investigate around timer interrupts: >> >> >> / # cat /proc/interrupts >>              CPU0 >>    16:         68       UIC   1 Level     serial >> LOC:          0   Local timer interrupts for timer event device >> LOC:          0   Local timer interrupts for others >> SPU:          0   Spurious interrupts >> PMI:          0   Performance monitoring interrupts >> MCE:          0   Machine check exceptions >> >> Any idea what the problem can be ? How does QEMU generates timer >> interrupts ? > > I did some archeology and fixed the 405 timer (PIT). Please see commits > in : > >   https://github.com/legoater/qemu/commits/ppc405 > > but we are still getting segfaults. At some point /init tries to load from > fffffe04 which is obviously wrong. Fetching an u32 value from a missing ROM? > > Add -d int,mmu to have more info from QEMU internals. > > I have gathered some info on this page : > >   https://github.com/legoater/qemu/wiki/ref405ep > > Thanks, > > C. >