From: Mika Westerberg <mika.westerberg@linux.intel.com>
To: Jonathan Cameron <Jonathan.Cameron@huawei.com>
Cc: Bjorn Helgaas <bhelgaas@google.com>,
"Rafael J . Wysocki" <rafael.j.wysocki@intel.com>,
Andy Shevchenko <andriy.shevchenko@linux.intel.com>,
Lukas Wunner <lukas@wunner.de>,
Chris Chiu <chris.chiu@canonical.com>,
linux-pci@vger.kernel.org, regressions@lists.linux.dev,
linux-cxl@vger.kernel.org, linuxarm@huawei.com
Subject: Re: Regression: Re: [PATCH v2 4/6] PCI: Distribute available resources for root buses too
Date: Mon, 24 Oct 2022 14:25:12 +0300 [thread overview]
Message-ID: <Y1Z2GGgfZyzC2d1N@black.fi.intel.com> (raw)
In-Reply-To: <Y1ZzRmi9fL9yHf7I@black.fi.intel.com>
On Mon, Oct 24, 2022 at 02:13:10PM +0300, Mika Westerberg wrote:
> Hi,
>
> On Fri, Oct 14, 2022 at 03:48:58PM +0100, Jonathan Cameron wrote:
> > > Thanks for the detailed report! I wonder if you could try the below
> > > patch and see if it changes anything?
> > Thanks for the quick response.
> >
> > Doesn't fix it unfortunately.
>
> I'm back now.
>
> Trying to reproduce this with mainline kernel (arm64 defconfig) and the
> following command line:
>
> qemu-system-aarch64 \
> -M virt,nvdimm=on,gic-version=3 -m 4g,maxmem=8G,slots=8 -cpu max -smp 4 \
> -bios /usr/share/qemu-efi-aarch64/QEMU_EFI.fd \
> -nographic -no-reboot \
> -kernel Image \
> -initrd rootfs.cpio.bz2 \
> -device pcie-root-port,port=0,id=root_port13,chassis=0,slot=2 \
> -device x3130-upstream,id=sw1,bus=root_port13,multifunction=on \
> -device e1000,bus=root_port13,addr=0.1 \
> -device xio3130-downstream,id=fun1,bus=sw1,chassis=0,slot=3 \
> -device e1000,bus=fun1
>
> But the resulting PCIe topology is pretty flat:
>
> # lspci
> 00:00.0 Host bridge: Red Hat, Inc. QEMU PCIe Host bridge
> 00:01.0 Ethernet controller: Red Hat, Inc. Virtio network device
>
> I wonder what I'm missing here? Do I need to enable additional drivers
> to get the topology to resemble yours?
Nevermind, I was missing one \ in the command line ;-) Now I can see the
topology similar to yours.
next prev parent reply other threads:[~2022-10-24 11:24 UTC|newest]
Thread overview: 21+ messages / expand[flat|nested] mbox.gz Atom feed top
2022-09-05 8:02 [PATCH v2 0/6] PCI: Allow for future resource expansion on initial root bus scan Mika Westerberg
2022-09-05 8:02 ` [PATCH v2 1/6] PCI: Fix used_buses calculation in pci_scan_child_bus_extend() Mika Westerberg
2022-09-05 8:02 ` [PATCH v2 2/6] PCI: Pass available buses also when the bridge is already configured Mika Westerberg
2022-09-05 8:02 ` [PATCH v2 3/6] PCI: Move pci_assign_unassigned_root_bus_resources() Mika Westerberg
2022-09-05 8:02 ` [PATCH v2 4/6] PCI: Distribute available resources for root buses too Mika Westerberg
2022-10-14 11:45 ` Regression: " Jonathan Cameron
2022-10-14 13:30 ` Mika Westerberg
2022-10-14 14:48 ` Jonathan Cameron
2022-10-24 11:13 ` Mika Westerberg
2022-10-24 11:25 ` Mika Westerberg [this message]
2022-10-25 12:36 ` Mika Westerberg
2022-10-25 13:23 ` Andy Shevchenko
2022-10-31 7:40 ` Mika Westerberg
2022-10-25 14:05 ` Jonathan Cameron
2022-10-26 8:38 ` Mika Westerberg
2022-10-26 8:49 ` Regression: Re: [PATCH v2 4/6] PCI: Distribute available resources for root buses too #forregzbot Thorsten Leemhuis
2022-10-26 18:16 ` Thorsten Leemhuis
2022-10-26 18:17 ` Thorsten Leemhuis
2022-09-05 8:02 ` [PATCH v2 5/6] PCI: Fix whitespace and indentation Mika Westerberg
2022-09-05 8:02 ` [PATCH v2 6/6] PCI: Fix typo in pci_scan_child_bus_extend() Mika Westerberg
2022-09-21 19:52 ` [PATCH v2 0/6] PCI: Allow for future resource expansion on initial root bus scan Bjorn Helgaas
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