From: Lukas Wunner <lukas@wunner.de>
To: Krishna Kumar <krishnak@linux.ibm.com>
Cc: linuxppc-dev@lists.ozlabs.org,
Timothy Pearson <tpearson@raptorengineering.com>,
Shawn Anastasio <sanastasio@raptorengineering.com>,
linux-kernel <linux-kernel@vger.kernel.org>,
"\"linux-pci\"," <linux-pci@vger.kernel.org>,
Madhavan Srinivasan <maddy@linux.ibm.com>,
Michael Ellerman <mpe@ellerman.id.au>,
christophe leroy <christophe.leroy@csgroup.eu>,
Naveen N Rao <naveen@kernel.org>,
"\"Bjorn Helgaas\"," <bhelgaas@google.com>
Subject: Re: [PATCH v2 6/6] pci/hotplug/pnv_php: Enable third attention indicator
Date: Sat, 21 Jun 2025 11:59:25 +0200 [thread overview]
Message-ID: <aFaCfYre9N52ARWH@wunner.de> (raw)
In-Reply-To: <19689b53-ac23-4b48-97c7-b26f360a7b75@linux.ibm.com>
On Fri, Jun 20, 2025 at 02:56:51PM +0530, Krishna Kumar wrote:
> 5. If point 3 and 4 does not solve the problem, then only we should
> move to pciehp.c. But AFAIK, PPC/Powernv is DT based while pciehp.c
> may be only supporting acpi (I have to check it on this). We need to
> provide PHB related information via DTB and maintain the related
> topology information via dtb and then it can be doable.
pciehp is not ACPI-specific. The PCIe port service driver in
drivers/pci/pcie/portdrv.c binds to any PCIe port, examines the
port's capabilities (e.g. hotplug, AER, DPC, ...) and instantiates
sub-devices to which pciehp and the other drivers such as aer bind.
How do you prevent pciehp from driving hotplug on PowerNV anyway?
Do you disable CONFIG_HOTPLUG_PCI_PCIE?
Thanks,
Lukas
next prev parent reply other threads:[~2025-06-21 9:59 UTC|newest]
Thread overview: 31+ messages / expand[flat|nested] mbox.gz Atom feed top
2025-06-18 16:54 [PATCH v2 0/6] PowerNV PCIe Hotplug Driver Fixes Timothy Pearson
2025-06-18 16:56 ` [PATCH v2 1/6] pci/hotplug/pnv_php: Properly clean up allocated IRQs on Timothy Pearson
2025-06-18 16:56 ` [PATCH v2 2/6] pci/hotplug/pnv_php: Work around switches with broken Timothy Pearson
2025-06-18 19:44 ` Bjorn Helgaas
2025-06-18 19:50 ` Timothy Pearson
2025-06-18 20:17 ` Bjorn Helgaas
2025-06-19 19:29 ` Timothy Pearson
2025-06-20 7:52 ` Lukas Wunner
2025-06-20 16:45 ` Timothy Pearson
2025-06-25 8:45 ` Lukas Wunner
2025-06-18 16:57 ` [PATCH v2 3/6] powerpc/eeh: Export eeh_unfreeze_pe() Timothy Pearson
2025-06-18 16:57 ` [PATCH v2 4/6] powerpc/eeh: Make EEH driver device hotplug safe Timothy Pearson
2025-06-18 16:58 ` [PATCH v2 5/6] pci/hotplug/pnv_php: Fix surprise plug detection and Timothy Pearson
2025-06-18 19:15 ` Bjorn Helgaas
2025-06-19 19:22 ` Timothy Pearson
2025-06-18 16:58 ` [PATCH v2 6/6] pci/hotplug/pnv_php: Enable third attention indicator Timothy Pearson
2025-06-18 19:01 ` Bjorn Helgaas
2025-06-19 0:37 ` Timothy Pearson
2025-06-20 9:26 ` Krishna Kumar
2025-06-21 9:59 ` Lukas Wunner [this message]
2025-06-25 4:08 ` Krishna Kumar
2025-06-25 8:08 ` Lukas Wunner
2025-06-25 10:55 ` Krishna Kumar
2025-06-21 15:05 ` Timothy Pearson
2025-06-24 7:07 ` Krishna Kumar
2025-06-24 16:34 ` Timothy Pearson
2025-06-24 22:34 ` Bjorn Helgaas
2025-07-07 8:01 ` Krishna Kumar
2025-07-11 18:18 ` Timothy Pearson
2025-07-11 21:05 ` Bjorn Helgaas
2025-07-15 21:41 ` Timothy Pearson
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