From: Lukas Wunner <lukas@wunner.de>
To: Mika Westerberg <mika.westerberg@linux.intel.com>
Cc: Mario Limonciello <mario.limonciello@amd.com>,
Esther Shimanovich <eshimanovich@chromium.org>,
Dmitry Torokhov <dmitry.torokhov@gmail.com>,
Bjorn Helgaas <bhelgaas@google.com>,
linux-pci@vger.kernel.org, linux-kernel@vger.kernel.org,
Rajat Jain <rajatja@google.com>
Subject: Re: [PATCH v4] PCI: Relabel JHL6540 on Lenovo X1 Carbon 7,8
Date: Tue, 23 Apr 2024 10:31:30 +0200 [thread overview]
Message-ID: <Zidx4lV2303H88R_@wunner.de> (raw)
In-Reply-To: <20240423053312.GY112498@black.fi.intel.com>
On Tue, Apr 23, 2024 at 08:33:12AM +0300, Mika Westerberg wrote:
> I think what you are looking for is that anything behind a PCIe tunnel
> should not have this applied. IIRC the AMD GPU or some code there were
> going to add identification of "virtual" links to the bandwidth
> calculation functionality.
I guess I could resurrect my correlation patch:
https://lore.kernel.org/all/f53ea40a7487e145aa1a62c347cef1814072e140.1536517047.git.lukas@wunner.de/
The last time I forward-ported it was for v5.13. I still have that code
running on my development machine.
The problem is that it only allows lookup from tb_port to pci_dev.
I'd have to add a pointer to struct pci_dev to allow lookups in the
inverse direction. Though I think we have such PCI companion devices
for CXL as well, so such a pointer could be useful in general.
I'm knee-deep in PCI device authentication code but could probably
dedicate a weekend to the correlation patch if there's interest?
Once we have correlation, we can expose more precise bandwidth
for virtual PCI links in sysfs.
Thanks,
Lukas
next prev parent reply other threads:[~2024-04-23 8:31 UTC|newest]
Thread overview: 41+ messages / expand[flat|nested] mbox.gz Atom feed top
2023-12-21 20:53 [PATCH v4] PCI: Relabel JHL6540 on Lenovo X1 Carbon 7,8 Esther Shimanovich
2023-12-21 23:15 ` Dmitry Torokhov
2023-12-27 0:15 ` Bjorn Helgaas
2023-12-28 13:25 ` Lukas Wunner
2023-12-28 13:39 ` Mika Westerberg
2024-01-17 21:21 ` Esther Shimanovich
2024-01-18 6:00 ` Mika Westerberg
2024-01-18 15:47 ` Mario Limonciello
2024-01-18 16:12 ` Dmitry Torokhov
2024-01-18 16:21 ` Dmitry Torokhov
2024-01-19 5:37 ` Mika Westerberg
2024-01-19 7:48 ` Mika Westerberg
2024-01-19 10:22 ` Mika Westerberg
2024-01-19 16:03 ` Esther Shimanovich
2024-01-22 6:10 ` Mika Westerberg
2024-01-22 23:50 ` Mario Limonciello
2024-01-23 6:18 ` Mika Westerberg
2024-01-25 23:45 ` Esther Shimanovich
2024-04-15 22:34 ` Esther Shimanovich
2024-04-16 5:03 ` Mika Westerberg
2024-04-18 19:43 ` Esther Shimanovich
2024-04-19 4:49 ` Mika Westerberg
2024-04-22 19:17 ` Esther Shimanovich
2024-04-22 19:21 ` Mario Limonciello
2024-04-23 5:33 ` Mika Westerberg
2024-04-23 8:31 ` Lukas Wunner [this message]
2024-04-23 8:40 ` Mika Westerberg
2024-04-23 16:59 ` Mario Limonciello
2024-04-24 8:56 ` Mika Westerberg
2024-04-25 21:16 ` Esther Shimanovich
2024-04-26 4:52 ` Mika Westerberg
2024-04-26 15:58 ` Esther Shimanovich
2024-04-27 5:35 ` Lukas Wunner
2024-04-27 7:41 ` Mika Westerberg
2024-04-27 7:08 ` Lukas Wunner
2024-04-27 15:09 ` Lukas Wunner
2024-05-01 22:23 ` Esther Shimanovich
2024-05-02 4:38 ` Mika Westerberg
2024-05-02 9:54 ` Mario Limonciello
2024-05-02 10:07 ` Mika Westerberg
2024-05-08 5:14 ` Lukas Wunner
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