Re: port-amd64/58410: x86_patch() panic with core ultra processor

[RVP <rvp%SDF.ORG@localhost>]

The following reply was made to PR port-amd64/58410; it has been noted by GNATS.

From: RVP <rvp%SDF.ORG@localhost>
To: gnats-bugs%netbsd.org@localhost
Cc: 
Subject: Re: port-amd64/58410: x86_patch() panic with core ultra processor
Date: Sun, 14 Jul 2024 23:25:43 +0000 (UTC)

 On Sun, 14 Jul 2024, Patrick Welche wrote:
 
 > FreeBSD successfully boots. It decodes the above
 >
 
 Does disabling x2apic in the kernel (like this, for instance) help:
 
 ```
 diff -urN a/src/sys/arch/x86/x86/lapic.c b/src/sys/arch/x86/x86/lapic.c
 --- a/src/sys/arch/x86/x86/lapic.c	2024-02-26 01:38:14.577331969 +0000
 +++ b/src/sys/arch/x86/x86/lapic.c	2024-07-14 23:22:34.869939414 +0000
 @@ -315,6 +315,7 @@
   			    "already enabled by BIOS; enabling.\n", reason);
   			reason = NULL;
   		}
 +		reason = "-- XXX Core Ultra XXX."
   		if (reason == NULL)
   			x2apic_mode = true;
   		else
 ```
 
 -RVP