From: Michal Pecio <michal.pecio@gmail.com>
To: Mario Limonciello <mario.limonciello@amd.com>
Cc: Yazen Ghannam <yazen.ghannam@amd.com>,
Shyam-sundar.S-k@amd.com, bhelgaas@google.com,
hdegoede@redhat.com, ilpo.jarvinen@linux.intel.com,
jdelvare@suse.com, linux-edac@vger.kernel.org,
linux-hwmon@vger.kernel.org, linux-kernel@vger.kernel.org,
linux-pci@vger.kernel.org, linux@roeck-us.net,
naveenkrishna.chatradhi@amd.com,
platform-driver-x86@vger.kernel.org, suma.hegde@amd.com,
tony.luck@intel.com, x86@kernel.org
Subject: Re: [PATCH v3 06/12] x86/amd_nb: Use topology info to get AMD node count
Date: Thu, 23 Oct 2025 19:06:44 +0200 [thread overview]
Message-ID: <20251023190644.114bf9f8.michal.pecio@gmail.com> (raw)
In-Reply-To: <5764e711-4c3f-4476-9ecb-1f7643e3b60d@amd.com>
On Thu, 23 Oct 2025 11:22:29 -0500, Mario Limonciello wrote:
> As this is an ancient BIOS this reminds me of some related commits:
>
> aa06e20f1be6 ("x86/ACPI: Don't add CPUs that are not online capable")
> a74fabfbd1b70 ("x86/ACPI/boot: Use FADT version to check support for
> online capable")
>
> Does reverting that second one help?
Not sure if it's worth trying? My BIOS predates the ACPI 6.3 spec by
several years and (if I understand correctly) MADT revision is 1.
It seems Yazen guessed right: they list 6 APICs and mark absent ones
as not enabled. But I don't think we can assume any ACPI 6.3 flags to
be valid here.
I wonder if some quick check could recognize those consumer CPUs and
simply ignore hotplug there? AFAIK it was never a thing on AM3.
Michal
next prev parent reply other threads:[~2025-10-23 17:06 UTC|newest]
Thread overview: 38+ messages / expand[flat|nested] mbox.gz Atom feed top
2025-01-07 22:28 [PATCH v3 00/12] AMD NB and SMN rework Yazen Ghannam
2025-01-07 22:28 ` [PATCH v3 01/12] x86/amd_nb: Restrict init function to AMD-based systems Yazen Ghannam
2025-01-07 22:28 ` [PATCH v3 02/12] x86/amd_nb: Clean up early_is_amd_nb() Yazen Ghannam
2025-01-07 22:28 ` [PATCH v3 03/12] x86: Start moving AMD node functionality out of AMD_NB Yazen Ghannam
2025-01-07 22:28 ` [PATCH v3 04/12] x86/amd_nb: Simplify function 4 search Yazen Ghannam
2025-01-07 22:28 ` [PATCH v3 05/12] x86/amd_nb: Simplify root device search Yazen Ghannam
2025-01-07 22:28 ` [PATCH v3 06/12] x86/amd_nb: Use topology info to get AMD node count Yazen Ghannam
2025-01-09 9:15 ` [tip: x86/misc] " tip-bot2 for Yazen Ghannam
2025-10-21 23:16 ` [PATCH v3 06/12] " Michal Pecio
2025-10-22 13:39 ` Yazen Ghannam
2025-10-22 15:38 ` Michal Pecio
2025-10-22 16:04 ` Guenter Roeck
2025-10-22 16:09 ` Yazen Ghannam
2025-10-22 16:18 ` Michal Pecio
2025-10-23 13:59 ` Yazen Ghannam
2025-10-23 15:01 ` Michal Pecio
2025-10-23 16:09 ` Yazen Ghannam
2025-10-23 16:22 ` Mario Limonciello
2025-10-23 17:06 ` Michal Pecio [this message]
2025-10-23 17:12 ` Mario Limonciello
2025-10-23 18:25 ` Yazen Ghannam
2025-10-23 21:43 ` Mario Limonciello
2025-10-23 16:31 ` Michal Pecio
2025-10-23 18:15 ` Yazen Ghannam
2025-10-23 18:25 ` Michal Pecio
2025-10-23 19:04 ` Yazen Ghannam
2025-10-23 19:09 ` Yazen Ghannam
2025-10-24 8:48 ` Michal Pecio
2025-10-24 13:42 ` Yazen Ghannam
2025-01-07 22:28 ` [PATCH v3 07/12] x86/amd_nb: Simplify function 3 search Yazen Ghannam
2025-01-09 9:15 ` [tip: x86/misc] " tip-bot2 for Yazen Ghannam
2025-01-07 22:28 ` [PATCH v3 08/12] x86/amd_nb, hwmon: (k10temp): Simplify amd_pci_dev_to_node_id() Yazen Ghannam
2025-01-07 22:28 ` [PATCH v3 09/12] x86/amd_nb: Move SMN access code to a new amd_node driver Yazen Ghannam
2025-01-08 5:30 ` Shyam Sundar S K
2025-01-08 8:56 ` Borislav Petkov
2025-01-07 22:28 ` [PATCH v3 10/12] x86/amd_node: Update __amd_smn_rw() error paths Yazen Ghannam
2025-01-07 22:28 ` [PATCH v3 11/12] x86/amd_node: Remove dependency on AMD_NB Yazen Ghannam
2025-01-07 22:28 ` [PATCH v3 12/12] x86/amd_node: Use defines for SMN register offsets Yazen Ghannam
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