Bug 4194

Summary:	FORCE_APIC_PHYSICAL_DESTINATION_MODE
Product:	ACPI	Reporter:	Jason Davis (jason)
Component:	Config-Tables	Assignee:	Len Brown (lenb)
Status:	CLOSED CODE_FIX
Severity:	high	CC:	acpi-bugzilla, bunk, protasnb
Priority:	P2
Hardware:	i386
OS:	Linux
Kernel Version:	2.6.10	Subsystem:
Regression:	---	Bisected commit-id:
Attachments:	Patch to use current ACPI implementation to determine physical APIC mode in x86_64 genapic mechanism Adds support for ACPI 3.0 standard tables (specifically FADT)

Description Jason Davis 2005-02-10 11:57:18 UTC

Distribution: any which uses 2.6.10
Hardware Environment: ES7000 Servers
Software Environment: System initialization
Problem Description:
The current x86_64 genapic driver only enables the apic_cluster driver depending 
on the number of clusters counted. The 4 most significant bits of the APICID
determine a cluster #. For the install case, the current x86_64 genapic
algorithm will only recognize one CPU (hence one cluster) and will default to
the apic_flat driver, which uses logical APIC mode for interrupt delivery
destination. This solution is not satisfactory for systems, like Unisys

Comment 1 Jason Davis 2005-02-10 12:00:43 UTC

Created attachment 4535 [details]
Patch to use current ACPI implementation to determine physical APIC mode in x86_64 genapic mechanism

Comment 2 Len Brown 2005-02-16 20:43:03 UTC

ACPI 3.0 is public, and we're adding support for its additional features to 
Linux as platforms demand them.

Clearly the ES7000 already has an FADT version 4 and you need this new FADT 
flag now.  We'll add that new definition so a cleaner patch to handle the 
ES7000 can be created.

Comment 3 Jason Davis 2005-03-04 13:30:26 UTC

Created attachment 4667 [details]
Adds support for ACPI 3.0 standard tables (specifically FADT)

Patch is based off LK 2.6.11 release tree.

Comment 4 Len Brown 2005-03-25 14:36:05 UTC

The ACPI 3.0 FADT flags bits already shipped in ACPICA 20050228:

http://linux-acpi.bkbits.net:8080/to-linus/cset@4224cfechsntwjpCIeewEG0XoNXx1Q?
nav=index.html|ChangeSet@-4w

You can get them from the URL above, the ACPI patch, or the mm patch -- 
they're queued to be pulled into 2.6.12-rc2.

Comment 5 Adrian Bunk 2005-07-12 13:40:48 UTC

I;m closing this bug since the patch was already merged into Linus' tree some
timw ago.