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Fri, 7 Nov 2025 06:06:13 +0100 (CET) Subject: Re: [PPC] Boot problems after the pci-v6.18-changes To: Bjorn Helgaas Cc: Manivannan Sadhasivam , Bjorn Helgaas , linux-pci@vger.kernel.org, mad skateman , "R.T.Dickinson" , Christian Zigotzky , linuxppc-dev , hypexed@yahoo.com.au, Darren Stevens , debian-powerpc@lists.debian.org, John Paul Adrian Glaubitz , Lukas Wunner , regressions@lists.linux.dev, luigi burdo , Al , Roland References: <20251105220925.GA1926619@bhelgaas> From: Christian Zigotzky Organization: A-EON Open Source Message-ID: <3a384a25-0256-e827-2d66-9efc5723965d@xenosoft.de> Date: Fri, 7 Nov 2025 06:06:12 +0100 X-Mailer: BrassMonkey/33.9.1 X-Mailing-List: linuxppc-dev@lists.ozlabs.org List-Id: List-Help: List-Owner: List-Post: List-Archive: , List-Subscribe: , , List-Unsubscribe: Precedence: list MIME-Version: 1.0 In-Reply-To: <20251105220925.GA1926619@bhelgaas> Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: 8bit On 11/05/2025 11:09 PM, Bjorn Helgaas wrote: >> I tested your patch with the RC4 of kernel 6.18 today. Unfortunately it >> doesn't solve the boot issue. > > Thanks for testing that.  I see now why that approach doesn't work: > quirk_disable_aspm_l0s_l1() calls pci_disable_link_state(), which > updates the permissible ASPM link states, but pci_disable_link_state() > only works for devices at the downstream end of a link.  It doesn't > work at all for Root Ports, which are at the upstream end of a link. > > Christian, you originally reported that both X5000 and X1000 were > broken.  I suspect X1000 may have been fixed in v6.18-rc3 by > df5192d9bb0e ("PCI/ASPM: Enable only L0s and L1 for devicetree > platforms"), but I would love to have confirmation of that. Hello Bjorn, I will enable CONFIG_PCIEASPM and CONFIG_PCIEASPM_DEFAULT for the RC5 of kernel 6.18 and test it with the X1000. Thanks, christian -- Sent with BrassMonkey 33.9.1 (https://github.com/chzigotzky/Web-Browsers-and-Suites-for-Linux-PPC/releases/tag/BrassMonkey_33.9.1)