From: Thomas Gleixner <tglx@linutronix.de>
To: "Michael Kelley (LINUX)" <mikelley@microsoft.com>,
Peter Zijlstra <peterz@infradead.org>
Cc: LKML <linux-kernel@vger.kernel.org>,
"x86@kernel.org" <x86@kernel.org>,
Tom Lendacky <thomas.lendacky@amd.com>,
Andrew Cooper <andrew.cooper3@citrix.com>,
Arjan van de Ven <arjan@linux.intel.com>,
"James E.J. Bottomley" <jejb@linux.ibm.com>,
Dick Kennedy <dick.kennedy@broadcom.com>,
James Smart <james.smart@broadcom.com>,
"Martin K. Petersen" <martin.petersen@oracle.com>,
"linux-scsi@vger.kernel.org" <linux-scsi@vger.kernel.org>,
Guenter Roeck <linux@roeck-us.net>,
"linux-hwmon@vger.kernel.org" <linux-hwmon@vger.kernel.org>,
Jean Delvare <jdelvare@suse.com>, Huang Rui <ray.huang@amd.com>,
Juergen Gross <jgross@suse.com>, Steve Wahl <steve.wahl@hpe.com>,
Mike Travis <mike.travis@hpe.com>,
Dimitri Sivanich <dimitri.sivanich@hpe.com>,
Russ Anderson <russ.anderson@hpe.com>
Subject: RE: [patch v2 21/38] x86/cpu: Provide cpu_init/parse_topology()
Date: Mon, 31 Jul 2023 22:48:46 +0200 [thread overview]
Message-ID: <87fs53n6xd.ffs@tglx> (raw)
In-Reply-To: <BYAPR21MB16885EA9B2A7F382D2F9C5A2D705A@BYAPR21MB1688.namprd21.prod.outlook.com>
On Mon, Jul 31 2023 at 16:10, Michael Kelley wrote:
> From: Thomas Gleixner <tglx@linutronix.de> Sent: Monday, July 31, 2023 8:38 AM
> The VM is an F72s_v2 in Azure running your patch set. The VM has
> 72 vCPUs in two NUMA nodes across two physical Intel processors, with
> 36 vCPUs in each NUMA node.
>
> The output is from /sys/kernel/debug/x86/topo/cpus, so the initial_apicid
> is from CPUID, while the apicid is from read_apic_id() and matches the
> MADT. As expected, the two values match for the first 36 vCPUs, but differ
> by 28 (decimal) for the remaining 36.
>
> initial_apicid: 0 apicid: 0
...
> initial_apicid: 23 apicid: 23
> initial_apicid: 40 apicid: 24
...
> initial_apicid: 63 apicid: 47
Is there any indication in some other CPUID leaf which lets us deduce this
wreckage?
I don't think the hypervisor space (0x40000xx) has anything helpful, but
staring at the architectural ones provided by hyper-V to the guest might
give us an hint. Can you provide a cpuid dump for the boot CPU please?
Thanks,
tglx
next prev parent reply other threads:[~2023-07-31 20:48 UTC|newest]
Thread overview: 72+ messages / expand[flat|nested] mbox.gz Atom feed top
2023-07-28 12:12 [patch v2 00/38] x86/cpu: Rework the topology evaluation Thomas Gleixner
2023-07-28 12:12 ` [patch v2 01/38] x86/cpu: Encapsulate topology information in cpuinfo_x86 Thomas Gleixner
2023-07-28 12:12 ` [patch v2 02/38] x86/cpu: Move phys_proc_id into topology info Thomas Gleixner
2023-07-28 12:12 ` [patch v2 03/38] x86/cpu: Move cpu_die_id " Thomas Gleixner
2023-07-28 12:12 ` [patch v2 04/38] scsi: lpfc: Use topology_core_id() Thomas Gleixner
2023-07-28 12:12 ` [patch v2 05/38] hwmon: (fam15h_power) " Thomas Gleixner
2023-07-28 12:12 ` [patch v2 06/38] x86/cpu: Move cpu_core_id into topology info Thomas Gleixner
2023-07-28 12:12 ` [patch v2 07/38] x86/cpu: Move cu_id " Thomas Gleixner
2023-07-28 12:12 ` [patch v2 08/38] x86/cpu: Remove pointless evaluation of x86_coreid_bits Thomas Gleixner
2023-07-28 12:12 ` [patch v2 09/38] x86/cpu: Move logical package and die IDs into topology info Thomas Gleixner
2023-07-28 12:12 ` [patch v2 10/38] x86/cpu: Move cpu_l[l2]c_id " Thomas Gleixner
2023-07-28 12:12 ` [patch v2 11/38] x86/apic: Use BAD_APICID consistently; Thomas Gleixner
2023-07-28 22:36 ` Sohil Mehta
2023-07-28 22:50 ` Thomas Gleixner
2023-07-28 12:12 ` [patch v2 12/38] x86/apic: Use u32 for APIC IDs in global data Thomas Gleixner
2023-07-28 12:12 ` [patch v2 13/38] x86/apic: Use u32 for check_apicid_used() Thomas Gleixner
2023-07-28 12:13 ` [patch v2 14/38] x86/apic: Use u32 for cpu_present_to_apicid() Thomas Gleixner
2023-07-28 12:13 ` [patch v2 15/38] x86/apic: Use u32 for phys_pkg_id() Thomas Gleixner
2023-08-08 20:14 ` Steve Wahl
2023-07-28 12:13 ` [patch v2 16/38] x86/apic: Use u32 for [gs]et_apic_id() Thomas Gleixner
2023-08-08 20:15 ` Steve Wahl
2023-07-28 12:13 ` [patch v2 17/38] x86/apic: Use u32 for wakeup_secondary_cpu[_64]() Thomas Gleixner
2023-08-08 20:15 ` Steve Wahl
2023-07-28 12:13 ` [patch v2 18/38] x86/cpu/topology: Cure the abuse of cpuinfo for persisting logical ids Thomas Gleixner
2023-07-28 12:13 ` [patch v2 19/38] x86/cpu: Provide debug interface Thomas Gleixner
2023-07-28 23:57 ` Sohil Mehta
2023-07-28 12:13 ` [patch v2 20/38] x86/cpu: Provide cpuid_read() et al Thomas Gleixner
2023-07-28 12:13 ` [patch v2 21/38] x86/cpu: Provide cpu_init/parse_topology() Thomas Gleixner
2023-07-29 0:02 ` Sohil Mehta
2023-07-31 4:05 ` Michael Kelley (LINUX)
2023-07-31 12:34 ` Thomas Gleixner
2023-07-31 13:27 ` Peter Zijlstra
2023-07-31 15:38 ` Thomas Gleixner
2023-07-31 16:10 ` Michael Kelley (LINUX)
2023-07-31 20:48 ` Thomas Gleixner [this message]
2023-07-31 21:27 ` Michael Kelley (LINUX)
2023-07-31 22:12 ` Thomas Gleixner
2023-08-01 22:25 ` Thomas Gleixner
2023-08-01 22:35 ` Andrew Cooper
2023-08-02 14:43 ` Michael Kelley (LINUX)
2023-07-31 16:25 ` Michael Kelley (LINUX)
2023-07-31 20:41 ` Thomas Gleixner
2023-07-31 13:47 ` Arjan van de Ven
2023-07-31 14:08 ` Andrew Cooper
2023-08-01 7:05 ` Gautham R. Shenoy
2023-08-01 7:34 ` Thomas Gleixner
2023-07-28 12:13 ` [patch v2 22/38] x86/cpu: Add legacy topology parser Thomas Gleixner
2023-07-28 21:33 ` [patch v2A " Thomas Gleixner
2023-07-28 12:13 ` [patch v2 23/38] x86/cpu: Use common topology code for Centaur and Zhaoxin Thomas Gleixner
2023-07-28 12:13 ` [patch v2 24/38] x86/cpu: Move __max_die_per_package to common.c Thomas Gleixner
2023-07-28 12:13 ` [patch v2 25/38] x86/cpu: Provide a sane leaf 0xb/0x1f parser Thomas Gleixner
2023-07-28 12:13 ` [patch v2 26/38] x86/cpu: Use common topology code for Intel Thomas Gleixner
2023-07-28 12:13 ` [patch v2 27/38] x86/cpu/amd: Provide a separate acessor for Node ID Thomas Gleixner
2023-07-29 0:07 ` Sohil Mehta
2023-07-28 12:13 ` [patch v2 28/38] x86/cpu: Provide an AMD/HYGON specific topology parser Thomas Gleixner
2023-07-29 0:05 ` Sohil Mehta
2023-07-30 5:20 ` Michael Kelley (LINUX)
2023-07-30 7:41 ` Thomas Gleixner
2023-07-28 12:13 ` [patch v2 29/38] x86/smpboot: Teach it about topo.amd_node_id Thomas Gleixner
2023-07-28 12:13 ` [patch v2 30/38] x86/cpu: Use common topology code for AMD Thomas Gleixner
2023-07-28 12:13 ` [patch v2 31/38] x86/cpu: Use common topology code for HYGON Thomas Gleixner
2023-07-28 12:13 ` [patch v2 32/38] x86/mm/numa: Use core domain size on AMD Thomas Gleixner
2023-07-28 12:13 ` [patch v2 33/38] x86/cpu: Make topology_amd_node_id() use the actual node info Thomas Gleixner
2023-07-28 12:13 ` [patch v2 34/38] x86/cpu: Remove topology.c Thomas Gleixner
2023-07-28 12:13 ` [patch v2 35/38] x86/cpu: Remove x86_coreid_bits Thomas Gleixner
2023-07-28 12:13 ` [patch v2 36/38] x86/apic: Remove unused phys_pkg_id() callback Thomas Gleixner
2023-08-08 20:15 ` Steve Wahl
2023-07-28 12:13 ` [patch v2 37/38] x86/xen/smp_pv: Remove cpudata fiddling Thomas Gleixner
2023-07-28 12:13 ` [patch v2 38/38] x86/apic/uv: Remove the private leaf 0xb parser Thomas Gleixner
2023-08-08 20:16 ` Steve Wahl
2023-07-28 15:41 ` [patch v2 00/38] x86/cpu: Rework the topology evaluation Dimitri Sivanich
2023-07-28 19:01 ` Sohil Mehta
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