From: Tomasz Pala <gotar@polanet.pl>
To: Bjorn Helgaas <helgaas@kernel.org>
Cc: linux-pci@vger.kernel.org,
"Dan J Williams" <dan.j.williams@intel.com>,
"Kan Liang" <kan.liang@linux.intel.com>,
"Tony Luck" <tony.luck@intel.com>,
"David E Box" <david.e.box@intel.com>,
"Yunying Sun" <yunying.sun@intel.com>,
"Dave Jiang" <dave.jiang@intel.com>,
"Mika Westerberg" <mika.westerberg@linux.intel.com>,
"Giovanni Cabiddu" <giovanni.cabiddu@intel.com>,
"Herbert Xu" <herbert@gondor.apana.org.au>,
"Hans de Goede" <hdegoede@redhat.com>,
"Florent DELAHAYE" <linuxkernelml@undead.fr>,
"Konrad J Hambrick" <kjhambrick@gmail.com>,
"Matt Hansen" <2lprbe78@duck.com>,
"Nicholas Johnson" <nicholas.johnson-opensource@outlook.com.au>,
"Benoit Grégoire" <benoitg@coeus.ca>,
"Werner Sembach" <wse@tuxedocomputers.com>,
mumblingdrunkard@protonmail.com, linux-kernel@vger.kernel.org,
"Bjorn Helgaas" <bhelgaas@google.com>,
"Sebastian Manciulea" <manciuleas@protonmail.com>
Subject: Re: [PATCH 2/2] x86/pci: Treat EfiMemoryMappedIO as reservation of ECAM space
Date: Sat, 18 Nov 2023 15:21:43 +0100 [thread overview]
Message-ID: <20231118142143.GA14101@polanet.pl> (raw)
In-Reply-To: <20231109184405.GA488882@bhelgaas>
On Thu, Nov 09, 2023 at 12:44:05 -0600, Bjorn Helgaas wrote:
>> https://bugzilla.kernel.org/show_bug.cgi?id=218050
>>
>> I think the problem is that the MMCONFIG region is at
>> [mem 0x80000000-0x8fffffff], and that is *also* included in one of the
>> host bridge windows reported via _CRS:
>>
>> PCI: MMCONFIG for domain 0000 [bus 00-ff] at [mem 0x80000000-0x8fffffff] (base 0x80000000)
>> pci_bus 0000:00: root bus resource [mem 0x80000000-0xfbffffff window]
>>
>> I'll try to figure out how to deal with that. In the meantime, would
>> you mind attaching the contents of /proc/iomem to the bugzilla? I
>
> I attached a debug patch to both bugzilla entries. If you could
> attach the "acpidump" output and (if practical) boot a kernel with the
> debug patch and attach the dmesg logs, that would be great.
I've posted the files. There are signs of buggy BIOS, but I don't expect
any firmware update to be released for this hw anymore.
DMI: Supermicro X9DRi-LN4+/X9DR3-LN4+/X9DRi-LN4+/X9DR3-LN4+, BIOS 3.4 11/20/2019
.text .data .bss are not marked as E820_TYPE_RAM!
tboot: non-0 tboot_addr but it is not of type E820_TYPE_RESERVED
DMAR: [Firmware Bug]: No firmware reserved region can cover this RMRR [0x00000000df243000-0x00000000df251fff], contact BIOS vendor for fixes
DMAR: [Firmware Bug]: Your BIOS is broken; bad RMRR [0x00000000df243000-0x00000000df251fff]
BTW is there a reason for this logging discrepancy?
efi: Remove mem173: MMIO range=[0xe0000000-0xefffffff] (256MB) from e820 map
efi: Not removing mem71: MMIO range=[0xe0000000-0xefffffff] (262144KB) from e820 map
efi: Not removing mem74: MMIO range=[0xff000000-0xffffffff] (16384KB) from e820 map
efi: Remove mem176: MMIO range=[0xff000000-0xffffffff] (16MB) from e820 map
This is arch/x86/platform/efi/efi.c:
static void __init efi_remove_e820_mmio(void)
Remove mem%02u: MMIO range=[0x%08llx-0x%08llx] (%lluMB) ... size >> 20
Not removing mem%02u: MMIO range=[0x%08llx-0x%08llx] (%lluKB) ... size >> 10
--
Tomasz Pala <gotar@pld-linux.org>
next prev parent reply other threads:[~2023-11-18 14:21 UTC|newest]
Thread overview: 25+ messages / expand[flat|nested] mbox.gz Atom feed top
2023-01-10 18:02 [PATCH 0/2] PCI: Fix extended config space regression Bjorn Helgaas
2023-01-10 18:02 ` [PATCH 1/2] x86/pci: Simplify is_mmconf_reserved() messages Bjorn Helgaas
2023-01-10 18:07 ` Dan Williams
2023-01-10 18:12 ` Bjorn Helgaas
2023-01-10 18:02 ` [PATCH 2/2] x86/pci: Treat EfiMemoryMappedIO as reservation of ECAM space Bjorn Helgaas
2023-01-10 18:15 ` Rafael J. Wysocki
2023-01-10 18:29 ` Dan Williams
2023-01-10 19:30 ` Bjorn Helgaas
2023-10-12 15:33 ` Tomasz Pala
2023-10-16 17:31 ` Tomasz Pala
2023-10-26 20:53 ` Bjorn Helgaas
2023-11-03 19:18 ` Bjorn Helgaas
2023-11-09 18:44 ` Bjorn Helgaas
2023-11-18 14:21 ` Tomasz Pala [this message]
2023-11-20 16:29 ` Bjorn Helgaas
2023-11-21 15:24 ` Tomasz Pala
2023-11-21 18:19 ` Bjorn Helgaas
2023-11-08 17:47 ` Bjorn Helgaas
2023-11-08 20:20 ` Bjorn Helgaas
2023-12-06 11:54 ` Linux regression tracking #update (Thorsten Leemhuis)
2023-01-10 20:38 ` [PATCH 0/2] PCI: Fix extended config space regression Liang, Kan
2023-01-10 22:57 ` Luck, Tony
2023-01-11 12:10 ` Giovanni Cabiddu
2023-01-11 22:30 ` Bjorn Helgaas
2023-01-12 5:50 ` Sun, Yunying
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