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Tue, 30 Jun 2026 10:35:16 +0000 (GMT) Received: from smtpav02.fra02v.mail.ibm.com (unknown [127.0.0.1]) by IMSVA (Postfix) with ESMTP id D5F0F20040; Tue, 30 Jun 2026 10:35:13 +0000 (GMT) Received: from shivang.bl1-in.ibm.com (unknown [9.123.12.247]) by smtpav02.fra02v.mail.ibm.com (Postfix) with ESMTP; Tue, 30 Jun 2026 10:35:13 +0000 (GMT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=ibm.com; h=cc :content-transfer-encoding:date:from:in-reply-to:message-id :mime-version:references:subject:to; s=pp1; bh=xC16TKR3EaGzAaWHs p6lmafNtXWvPDGlysq0rCnwMpY=; b=bvKLNRZxZ6OIAG2sg1il6OYajzvuWEBDi L9PVU7tJM38wvH/o0cbZiGxWKri8zHjLbY9aLPcxQShkKOgWGVtl5ekjOVEWx355 /Q/1W5u1UqScHY10XXmSSH89pSqUG76sXsYKFmtA3fuXDryDuimKqiA/l6IiMEXp UfxZTjFy8zmu1N0+4ytbWdaQuXIlLVyJdd2+2owJ1Usbj96B16b0c3KeQLTyh6oV t7Lf0pYoF7aOmjYo9y7ccoqBA/ds7Ohhv3dqdQHFqkhkkBSfnUSJKoFpgP6JpUgV 36B43Y8Y9L+ZqI9zHcer0T7OCH7MF3/nUAKYYNdypFhgQ5m+7cESQ== From: Shivang Upadhyay To: adityag@linux.ibm.com, harshpb@linux.ibm.com, qemu-devel@nongnu.org, qemu-ppc@nongnu.org Cc: shivangu@linux.ibm.com, milesg@linux.ibm.com, npiggin@gmail.com, amachhiw@linux.ibm.com Subject: [PATCH v3 1/2] ppc/pnv: avoid regenerating DTB if external DTB is present Date: Tue, 30 Jun 2026 16:05:07 +0530 Message-ID: <20260630103508.254000-2-shivangu@linux.ibm.com> X-Mailer: git-send-email 2.54.0 In-Reply-To: <20260630103508.254000-1-shivangu@linux.ibm.com> References: <20260630103508.254000-1-shivangu@linux.ibm.com> MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable X-TM-AS-GCONF: 00 X-Proofpoint-Reinject: loops=2 maxloops=12 X-Authority-Analysis: v=2.4 cv=RYqgzVtv c=1 sm=1 tr=0 ts=6a439be9 cx=c_pps a=bLidbwmWQ0KltjZqbj+ezA==:117 a=bLidbwmWQ0KltjZqbj+ezA==:17 a=FelO9ux0wxsA:10 a=VkNPw1HP01LnGYTKEx00:22 a=RnoormkPH1_aCDwRdu11:22 a=uAbxVGIbfxUO_5tXvNgY:22 a=VnNF1IyMAAAA:8 a=6hYU8IMl6WZeLP_gbRQA:9 X-Proofpoint-Spam-Info: AW1haW4tMjYwNjMwMDA5MyBTYWx0ZWRfX2jBrKt54n6g4 s0E0eqElZwgUAg0e7b0ToyCSjpyDAd3+Y0cSoEs4NTyZ6cCveQbr5hALUahTZciTHEF5F2bDZi0 7Z5jXL3K+KWNSKgASGMkc1LIjY85GKo= X-Proofpoint-GUID: JZVpy9shFBdTNl9rKcNC_Y1zfhZfVC4V X-Proofpoint-Spam-Details-Enc: AW1haW4tMjYwNjMwMDA5MyBTYWx0ZWRfX14iwS0Qt8GKE ynTatpqURA9goLdVVISkHoVbO9XVAvKtLhWNWCwtgMrZPxA8HVZJMVVPQ5Q0udq5dsLyUAxtmlz vHK3UM5AnhkHBnlFncwL0gLba9kDUBO8qMeDT8scImvdw8qZkWLsqEZOW26uAh/i+X3GlfQCZn6 zA52CWzn8rxe5Q7Up0RCo35+Ezs1hwKOrithUkeYbsElqeescMOrsEZXIL17gIfw8fzjbZzfMud Zh+IFRqj0+UXvQSzDI+aqZP9GD5s0gOlUgJdGT4UsAPNAvOEaryrnBEqw9kRt+iOT7PSReowslS G7TR4CUUt/W1ioBZnHOMDbKG57zXn+iC+OGQXxsHwj8bVN5dhN3/X8RduCQ6ACWyHfV/w0FnbhK T5epSPqEPU5H/bTTpsMzke2gIoz/RqxykUUd8ybK2IHTVDSubMdMXBXSBWJgBi67z7A8geSUPYf sbjErKqwl7Iwh3OPRmg== X-Proofpoint-ORIG-GUID: QBtHkLY_vaCjSncPNnHsZXGQ2ahslbvd X-Proofpoint-Virus-Version: vendor=baseguard engine=ICAP:2.0.293,Aquarius:18.0.1143,Hydra:6.1.125,FMLib:17.12.100.49 definitions=2026-06-30_03,2026-06-26_01,2025-10-01_01 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 phishscore=0 impostorscore=0 malwarescore=0 spamscore=0 lowpriorityscore=0 adultscore=0 priorityscore=1501 suspectscore=0 bulkscore=0 clxscore=1015 classifier=typeunknown authscore=0 authtc= authcc= route=outbound adjust=0 reason=mlx scancount=1 engine=8.22.0-2606150000 definitions=main-2606300093 Received-SPF: pass (zohomail.com: domain of gnu.org designates 209.51.188.17 as permitted sender) client-ip=209.51.188.17; envelope-from=qemu-devel-bounces+importer=patchew.org@nongnu.org; helo=lists1p.gnu.org; Received-SPF: pass client-ip=148.163.156.1; envelope-from=shivangu@linux.ibm.com; helo=mx0a-001b2d01.pphosted.com X-Spam_score_int: -26 X-Spam_score: -2.7 X-Spam_bar: -- X-Spam_report: (-2.7 / 5.0 requ) BAYES_00=-1.9, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_EF=-0.1, RCVD_IN_DNSWL_LOW=-0.7, RCVD_IN_MSPIKE_H4=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: qemu development List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: qemu-devel-bounces+importer=patchew.org@nongnu.org Sender: qemu-devel-bounces+importer=patchew.org@nongnu.org X-ZohoMail-DKIM: pass (identity @ibm.com) X-ZM-MESSAGEID: 1782815764647158500 Content-Type: text/plain; charset="utf-8" Currently externally provided dtb is overwritten in `pnv_reset`. Fix this by only creating dtb if not provided from `-dtb`. Reviewed-by: Aditya Gupta Signed-off-by: Shivang Upadhyay Reviewed-by: Amit Machhiwal --- hw/ppc/pnv.c | 10 +++++++--- 1 file changed, 7 insertions(+), 3 deletions(-) diff --git a/hw/ppc/pnv.c b/hw/ppc/pnv.c index 62812f22f8..afb6019b10 100644 --- a/hw/ppc/pnv.c +++ b/hw/ppc/pnv.c @@ -803,9 +803,13 @@ static void pnv_reset(MachineState *machine, ResetType= type) mpipl_write_succeeded =3D do_mpipl_write(pnv); } =20 - /* Regenerate device tree */ - fdt =3D pnv_dt_create(machine); - _FDT((fdt_pack(fdt))); + /* Only create new dt if not provided in -dtb */ + if (!machine->dtb) { + fdt =3D pnv_dt_create(machine); + _FDT((fdt_pack(fdt))); + } else { + fdt =3D machine->fdt; + } =20 /* * If it's a MPIPL boot, add the "mpipl-boot" property, and reset the --=20 2.54.0 From nobody Sun Jul 26 11:50:47 2026 Delivered-To: importer@patchew.org Authentication-Results: mx.zohomail.com; dkim=pass; spf=pass (zohomail.com: domain of gnu.org designates 209.51.188.17 as permitted sender) smtp.mailfrom=qemu-devel-bounces+importer=patchew.org@nongnu.org; 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envelope-from=qemu-devel-bounces+importer=patchew.org@nongnu.org; helo=lists1p.gnu.org; Received-SPF: pass client-ip=148.163.156.1; envelope-from=shivangu@linux.ibm.com; helo=mx0a-001b2d01.pphosted.com X-Spam_score_int: -26 X-Spam_score: -2.7 X-Spam_bar: -- X-Spam_report: (-2.7 / 5.0 requ) BAYES_00=-1.9, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_EF=-0.1, RCVD_IN_DNSWL_LOW=-0.7, RCVD_IN_MSPIKE_H4=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: qemu development List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: qemu-devel-bounces+importer=patchew.org@nongnu.org Sender: qemu-devel-bounces+importer=patchew.org@nongnu.org X-ZohoMail-DKIM: pass (identity @ibm.com) X-ZM-MESSAGEID: 1782815764661158500 Content-Type: text/plain; charset="utf-8" Test boots a powernv11 machine, using a custom dtb. Custom dtb has the following bootargs. chosen { bootargs =3D "hello world"; }; Test Checks whether above bootargs make it to kernel's command line. Reviewed-by: Aditya Gupta Signed-off-by: Shivang Upadhyay --- tests/functional/ppc64/test_powernv.py | 19 +++++++++++++++++++ 1 file changed, 19 insertions(+) diff --git a/tests/functional/ppc64/test_powernv.py b/tests/functional/ppc6= 4/test_powernv.py index 0ea6c93e42..b5b2f0d158 100755 --- a/tests/functional/ppc64/test_powernv.py +++ b/tests/functional/ppc64/test_powernv.py @@ -27,6 +27,11 @@ class PowernvMachine(LinuxKernelTest): 'buildroot/qemu_ppc64le_powernv8-2025.02/rootfs.ext2'), 'aee2192b692077c4bde31cb56ce474424b358f17cec323d5c94af3970c9aada2') =20 + # testdtb for power11, which contains string "hello world" in command = line + ASSET_SAMPLE_DTB =3D Asset( + ('https://github.com/roz3x/qemu/raw/refs/heads/sample-dtb/qemu-pow= ernv11.dtb'), + 'ea1271516264eea1eb58a067a99d0c2ca9528be8dc7d4e46bb2d5ae0d42fc568') + def do_test_linux_boot(self, command_line =3D KERNEL_COMMON_COMMAND_LI= NE): self.require_accelerator("tcg") kernel_path =3D self.ASSET_KERNEL.fetch() @@ -104,6 +109,20 @@ def do_test_ppc64_powernv(self, proc): # Device detection output driven by udev probing is sometimes cut = off # from console output, suspect S14silence-console init script. =20 + def test_ppc64_powernv_external_dtb(self): + self.set_machine('powernv11') + self.require_accelerator("tcg") + + kernel_path =3D self.ASSET_KERNEL.fetch() + sample_dtb_path =3D self.ASSET_SAMPLE_DTB.fetch() + self.vm.set_console() + self.vm.add_args('-kernel', kernel_path, + '-dtb', sample_dtb_path) + self.vm.launch() + + # check if custom dtb is reflected or not + wait_for_console_pattern(self, "Kernel command line: hello world",= self.panic_message) + def test_powernv8(self): self.set_machine('powernv8') self.do_test_ppc64_powernv('P8') --=20 2.54.0