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[83.57.170.138]) by smtp.gmail.com with ESMTPSA id bs18sm7740439edb.38.2020.07.17.02.00.43 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Fri, 17 Jul 2020 02:00:44 -0700 (PDT) Subject: Re: [PATCH v5 10/11] hw/arm: Wire up BMC boot flash for npcm750-evb and quanta-gsj From: =?UTF-8?Q?Philippe_Mathieu-Daud=c3=a9?= To: Thomas Huth , Havard Skinnemoen , Markus Armbruster References: <20200709003608.3834629-1-hskinnemoen@google.com> <20200709003608.3834629-11-hskinnemoen@google.com> <109d52ed-65bf-0fcc-98f1-47b7a6671d0b@kaod.org> <875zaq78xq.fsf@dusky.pond.sub.org> <19733456-a672-595d-e721-e0ef26d7f665@amsat.org> <87v9iq2hkv.fsf@dusky.pond.sub.org> <87pn8xywz2.fsf@dusky.pond.sub.org> <5345d70f-3041-ed13-12e9-9a8e3d803805@amsat.org> <416d5243-dc8e-37c6-197f-96dec1c9f5cc@redhat.com> Autocrypt: addr=f4bug@amsat.org; keydata= mQINBDU8rLoBEADb5b5dyglKgWF9uDbIjFXU4gDtcwiga9wJ/wX6xdhBqU8tlQ4BroH7AeRl u4zXP0QnBDAG7EetxlQzcfYbPmxFISWjckDBFvDbFsojrZmwF2/LkFSzlvKiN5KLghzzJhLO HhjGlF8deEZz/d/G8qzO9mIw8GIBS8uuWh6SIcG/qq7+y+2+aifaj92EdwU79apZepT/U3vN YrfcAuo1Ycy7/u0hJ7rlaFUn2Fu5KIgV2O++hHYtCCQfdPBg/+ujTL+U+sCDawCyq+9M5+LJ ojCzP9rViLZDd/gS6jX8T48hhidtbtsFRj/e9QpdZgDZfowRMVsRx+TB9yzjFdMO0YaYybXp dg/wCUepX5xmDBrle6cZ8VEe00+UQCAU1TY5Hs7QFfBbjgR3k9pgJzVXNUKcJ9DYQP0OBH9P ZbZvM0Ut2Bk6bLBO5iCVDOco0alrPkX7iJul2QWBy3Iy9j02GnA5jZ1Xtjr9kpCqQT+sRXso Vpm5TPGWaWljIeLWy/qL8drX1eyJzwTB3A36Ck4r3YmjMjfmvltSZB1uAdo1elHTlFEULpU/ HiwvvqXQ9koB15U154VCuguvx/Qnboz8GFb9Uw8VyawzVxYVNME7xw7CQF8FYxzj6eI7rBf2 Dj/II6wxWPgDEy3oUzuNOxTB7sT3b/Ym76yOJzWX5BylXQIJ5wARAQABtDFQaGlsaXBwZSBN YXRoaWV1LURhdWTDqSAoRjRCVUcpIDxmNGJ1Z0BhbXNhdC5vcmc+iQJVBBMBCAA/AhsPBgsJ CAcDAgYVCAIJCgsEFgIDAQIeAQIXgBYhBPqr514SkXIh3P1rsuPjLCzercDeBQJd660aBQks klzgAAoJEOPjLCzercDe2iMP+gMG2dUf+qHz2uG8nTBGMjgK0aEJrKVPodFA+iedQ5Kp3BMo jrTg3/DG1HMYdcvQu/NFLYwamUfUasyor1k+3dB23hY09O4xOsYJBWdilkBGsJTKErUmkUO2 3J/kawosvYtJJSHUpw3N6mwz/iWnjkT8BPp7fFXSujV63aZWZINueTbK7Y8skFHI0zpype9s loU8xc4JBrieGccy3n4E/kogGrTG5jcMTNHZ106DsQkhFnjhWETp6g9xOKrzZQbETeRBOe4P sRsY9YSG2Sj+ZqmZePvO8LyzGRjYU7T6Z80S1xV0lH6KTMvq7vvz5rd92f3pL4YrXq+e//HZ JsiLen8LH/FRhTsWRgBtNYkOsd5F9NvfJtSM0qbX32cSXMAStDVnS4U+H2vCVCWnfNug2TdY 7v4NtdpaCi4CBBa3ZtqYVOU05IoLnlx0miKTBMqmI05kpgX98pi2QUPJBYi/+yNu3fjjcuS9 K5WmpNFTNi6yiBbNjJA5E2qUKbIT/RwQFQvhrxBUcRCuK4x/5uOZrysjFvhtR8YGm08h+8vS n0JCnJD5aBhiVdkohEFAz7e5YNrAg6kOA5IVRHB44lTBOatLqz7ntwdGD0rteKuHaUuXpTYy CRqCVAKqFJtxhvJvaX0vLS1Z2dwtDwhjfIdgPiKEGOgCNGH7R8l+aaM4OPOd Message-ID: Date: Fri, 17 Jul 2020 11:00:43 +0200 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:68.0) Gecko/20100101 Thunderbird/68.5.0 MIME-Version: 1.0 In-Reply-To: Content-Type: text/plain; charset=utf-8 Content-Language: en-US Content-Transfer-Encoding: 8bit Received-SPF: pass client-ip=2a00:1450:4864:20::641; envelope-from=philippe.mathieu.daude@gmail.com; helo=mail-ej1-x641.google.com X-detected-operating-system: by eggs.gnu.org: No matching host in p0f cache. That's all we know. X-Spam_score_int: 0 X-Spam_score: 0.0 X-Spam_bar: / X-Spam_report: (0.0 / 5.0 requ) BAYES_00=-1.9, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_EF=-0.1, FREEMAIL_FORGED_FROMDOMAIN=1, FREEMAIL_FROM=0.001, HEADER_FROM_DIFFERENT_DOMAINS=1, RCVD_IN_DNSWL_NONE=-0.0001, SPF_HELO_NONE=0.001, SPF_PASS=-0.001 autolearn=no 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: Kevin Wolf , Peter Maydell , Qemu-block , QEMU Developers , CS20 KFTing , qemu-arm , =?UTF-8?Q?C=c3=a9dric_Le_Goater?= , IS20 Avi Fishman Errors-To: qemu-devel-bounces+alex.bennee=linaro.org@nongnu.org Sender: "Qemu-devel" X-TUID: 7zXEEQB5f9ob On 7/17/20 10:27 AM, Philippe Mathieu-Daudé wrote: > On 7/17/20 10:03 AM, Thomas Huth wrote: >> On 17/07/2020 09.48, Philippe Mathieu-Daudé wrote: >>> +Thomas >> >>> On 7/16/20 10:56 PM, Havard Skinnemoen wrote: >>>> On Wed, Jul 15, 2020 at 1:54 PM Havard Skinnemoen >>>> wrote: >>>>> >>>>> On Wed, Jul 15, 2020 at 3:57 AM Philippe Mathieu-Daudé wrote: >>>>>> >>>>>> On 7/15/20 11:00 AM, Markus Armbruster wrote: >>>>>>> Now my point. Why first make up user configuration, then use that to >>>>>>> create a BlockBackend, when you could just go ahead and create the >>>>>>> BlockBackend? >>>>>> >>>>>> CLI issue mostly. >>>>>> >>>>>> We can solve it similarly to the recent "sdcard: Do not allow invalid SD >>>>>> card sizes" patch: >>>>>> >>>>>> if (!dinfo) { >>>>>> error_setg(errp, "Missing SPI flash drive"); >>>>>> error_append_hint(errp, "You can use a dummy drive using:\n"); >>>>>> error_append_hint(errp, "-drive if=mtd,driver=null-co," >>>>>> "read-ones=on,size=64M\n); >>>>>> return; >>>>>> } >>>>>> >>>>>> having npcm7xx_connect_flash() taking an Error* argument, >>>>>> and MachineClass::init() call it with &error_fatal. >>>>> >>>>> Erroring out if the user specifies a configuration that can't possibly >>>>> boot sounds good to me. Better than trying to come up with defaults >>>>> that are still not going to result in a bootable system. >>>>> >>>>> For testing recovery paths, I think it makes sense to explicitly >>>>> specify a null device as you suggest. >>>> >>>> Hmm, one problem. qom-test fails with >>>> >>>> qemu-system-aarch64: Missing SPI flash drive >>>> You can add a dummy drive using: >>>> -drive if=mtd,driver=null-co,read-zeroes=on,size=32M >>>> Broken pipe >>>> /usr/local/google/home/hskinnemoen/qemu/for-upstream/tests/qtest/libqtest.c:166: >>>> kill_qemu() tried to terminate QEMU process but encountered exit >>>> status 1 (expected 0) >>>> ERROR qom-test - too few tests run (expected 68, got 7) >>>> >>>> So it looks like we might need a different solution to this, unless we >>>> want to make generic tests more machine-aware... >> >> I didn't follow the other mails in this thread, but what we usually do >> in such a case: Add a "if (qtest_enabled())" check to the device or the >> machine to ignore the error if it is running in qtest mode. > > Hmm I'm not sure it works in this case. We could do: > > if (!dinfo) { > if (qtest) { > /* create null drive for qtest */ > opts = ...; > dinfo = drive_new(opts, IF_MTD, &error_abort); > } else { > /* teach user to use proper CLI */ > error_setg(errp, "Missing SPI flash drive"); > error_append_hint(errp, "You can use a dummy drive using:\n"); > error_append_hint(errp, "-drive if=mtd,driver=null-co," > "read-ones=on,size=64M\n); > } > } > > But I'm not sure Markus will enjoy it :) > > Markus, any better idea about how to handle that with automatic qtests? FWIW IDE device has a concept of "Anonymous BlockBackend for an empty drive": static void ide_dev_initfn(IDEDevice *dev, IDEDriveKind kind, Error **errp) { IDEBus *bus = DO_UPCAST(IDEBus, qbus, dev->qdev.parent_bus); IDEState *s = bus->ifs + dev->unit; int ret; if (!dev->conf.blk) { if (kind != IDE_CD) { error_setg(errp, "No drive specified"); return; } else { /* Anonymous BlockBackend for an empty drive */ dev->conf.blk = blk_new(qemu_get_aio_context(), 0, BLK_PERM_ALL); ret = blk_attach_dev(dev->conf.blk, &dev->qdev); assert(ret == 0); } }