Intel ICH5 APIC, ACPI problems in 2.4

I have a couple uniprocessor ICH5 systems from different vendors, with similar behavior:

2.6: HyperThreading works, ACPI works, all irqs properly routed

2.4: HT works only works with ACPI enabled, but,
ACPI kills the irq routing for the external PCI slots. pci=noacpi or whatever doesn't work. !CONFIG_ACPI + "noapic" fixes irq routing, but then no HT sibling appears.

It seems like kernel 2.4.22-rc is missing some ACPI and possibly some APIC fixes?

Jeff

To give a datapoint:

ICH5 works like a breeze with RH 2.4.20-19.9 kernel:

% lspci -vt

-[00]-+-00.0 Intel Corp. 82865G [Springdale-G] Chipset Host Bridge [...]

      +-1f.1  Intel Corp. 82801EB ICH5 IDE

[...]

% cat /proc/cpuinfo | grep -i genuine | wc -l

      2

% dmesg
Linux version 2.4.20-19.9smp ([email protected]) (gcc version 3.2.2 20030222 (Red Hat Linux 3.2.2-5)) #1 SMP Tue Jul 15 17:04:18 EDT 2003 [...]
ACPI: Searched entire block, no RSDP was found.
ACPI: RSDP located at physical address c00f5b40
RSD PTR v0 [ACPIAM]
ACPI table found: RSDT v1 [INTEL D865PERL 8195.1813]
ACPI table found: FACP v2 [INTEL D865PERL 8195.1813]
ACPI table found: APIC v1 [INTEL D865PERL 8195.1813]
LAPIC (acpi_id[0x0001] id[0x0] enabled[1])
CPU 0 (0x0000) enabledProcessor #0 Pentium 4(tm) XEON(tm) APIC version 16
LAPIC_NMI (acpi_id[0x0001] polarity[0x0] trigger[0x0] lint[0x1])
LAPIC (acpi_id[0x0002] id[0x1] enabled[1])
CPU 1 (0x0100) enabledProcessor #1 Pentium 4(tm) XEON(tm) APIC version 16
[...]

This is an intel 865 PERLK desktop board with a 2,6 GHz HT CPU. Even the ICH5 serial ATA works which really had me impressed:

ICH5-SATA: IDE controller at PCI slot 00:1f.2
ICH5-SATA: chipset revision 2
ICH5-SATA: 100% native mode on irq 18

    ide2: BM-DMA at 0xdc00-0xdc07, BIOS settings: hde:DMA, hdf:pio
    ide3: BM-DMA at 0xdc08-0xdc0f, BIOS settings: hdg:pio, hdh:pio

hde: Maxtor 6Y120M0, ATA DISK drive
hde: attached ide-disk driver.
hde: host protected area => 1
hde: 240121728 sectors (122942 MB) w/7936KiB Cache, CHS=238216/16/63, UDMA(33)

(The UDMA(33) seems to be a lie, I can read ~ 57 MBytes/sec from this disk).

So there might be some patches in the RH kernel, that are missing from 2.4.22-rc2

Regards
Henning

Dipl.-Inf. (Univ.) Henning P. Schmiedehausen          INTERMETA GmbH
[email protected]        +49 9131 50 654 0   http://www.intermeta.de/

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