diff mbox series

[V2,34/38] x86/cpu/amd; Invoke detect_extended_topology_early() on boot CPU

Message ID 20230504185938.179661118@linutronix.de
State New
Headers
Series cpu/hotplug, x86: Reworked parallel CPU bringup |

Commit Message

Thomas Gleixner May 4, 2023, 7:02 p.m. UTC 
  From: Thomas Gleixner <tglx@linutronix.de>

The early detection stores the extended topology leaf number which is
required for parallel hotplug.

Signed-off-by: Thomas Gleixner <tglx@linutronix.de>

---
 arch/x86/kernel/cpu/amd.c |    2 ++
 1 file changed, 2 insertions(+)
---

Comments

Thomas Gleixner May 5, 2023, 12:45 p.m. UTC | #1 
On Fri, May 05 2023 at 00:04, Andrew Cooper wrote:
> On 04/05/2023 8:02 pm, Thomas Gleixner wrote:
>> From: Thomas Gleixner <tglx@linutronix.de>
>>
>> The early detection stores the extended topology leaf number which is
>> required for parallel hotplug.
>>
>> Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
>
> It occurs to me that this and the previous patch are stale given that we
> no longer look at CPUID in the trampoline.
>
> They're probably useful changes in isolation, but the commit messages
> want adjusting to remove the association with parallel boot.

Duh. Indeed. Completely forgot about that.
diff mbox series

Patch

--- a/arch/x86/kernel/cpu/amd.c
+++ b/arch/x86/kernel/cpu/amd.c
@@ -692,6 +692,8 @@  static void early_init_amd(struct cpuinf
 		}
 	}
 
+	detect_extended_topology_early(c);
+
 	if (cpu_has(c, X86_FEATURE_TOPOEXT))
 		smp_num_siblings = ((cpuid_ebx(0x8000001e) >> 8) & 0xff) + 1;
 }