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

[Patrick Welche <prlw1%welche.eu@localhost>]

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

From: Patrick Welche <prlw1%welche.eu@localhost>
To: gnats-bugs%netbsd.org@localhost
Cc: matthew green <mrg%eterna23.net@localhost>
Subject: Re: port-amd64/58410: x86_patch() panic with core ultra processor
Date: Wed, 10 Jul 2024 09:38:44 +0100

 Firing at will I disabled:
 
 - SMM Security Mitigation ("However, this feature may cause compatibility
   issues or loss of functionality with some legacy tools and applications")
 - OS Kernel DMA protection
 
 and still see the panic. (Don't see anything else to turn off)
 
 Now with a GENERICDBG kernel I can see dmesg in ddb:
 
 ioapic0 at mainbus0 apid 2: pa 0xfec00000, version 0x20, 120 pins
 x2APIC disabled by user and enabled by BIOS; ignoring user setting.
 bogus MADT X2APIC entry (id = 0x10 11 18 19 20 21 28...
 
 On the laptop I am writing this on, I see
 
 ioapic0 at mainbus0 apid 2: pa 0xfec00000, version 0x20, 120 pins
 cpu0 at mainbus0 apid 0
 
 which means the cpu0 etc are missing, with bogus MADT instead
 
 
 I also get the panic with "boot -1":
 
 x86_patch() at netbsd:x86_patch+0xfb  (arch/x86/x86/patch.c:356)
 cpu_boot_secondary_processors()  + 0x16
 main() + 0x3a2