From mboxrd@z Thu Jan 1 00:00:00 1970 From: Bastian Blank Subject: Re: pvops-2.6.32 - Interrupt routing problem Date: Fri, 19 Mar 2010 12:39:04 +0100 Message-ID: <20100319113904.GA29200@wavehammer.waldi.eu.org> References: <4B9D0726.3060304@goop.org> <20100314161750.GA7790@wavehammer.waldi.eu.org> <20100315101126.GA24650@wavehammer.waldi.eu.org> <20100315211459.GA9314@wavehammer.waldi.eu.org> <20100316013114.GD7622@phenom.dumpdata.com> <20100316081832.GA20502@wavehammer.waldi.eu.org> <20100316153216.GB28821@phenom.dumpdata.com> <20100316182053.GA2258@wavehammer.waldi.eu.org> Mime-Version: 1.0 Content-Type: text/plain; charset=utf-8 Return-path: Content-Disposition: inline In-Reply-To: <20100316182053.GA2258@wavehammer.waldi.eu.org> List-Unsubscribe: , List-Post: List-Help: List-Subscribe: , Sender: xen-devel-bounces@lists.xensource.com Errors-To: xen-devel-bounces@lists.xensource.com To: Konrad Rzeszutek Wilk Cc: Jeremy Fitzhardinge , "xen-devel@lists.xensource.com" , Keir Fraser , "Zhang, Xiantao" List-Id: xen-devel@lists.xenproject.org On Tue, Mar 16, 2010 at 07:20:53PM +0100, Bastian Blank wrote: Okay, lets go through the log again. Initial readout before dom0 starts. Only 0 and 9 masked. > (XEN) NR Log Phy Mask Trig IRR Pol Stat Dest Deli Vect: > (XEN) 00 000 00 1 0 0 0 0 0 0 00 > (XEN) 01 000 00 0 0 0 0 0 0 0 28 > (XEN) 02 000 00 0 0 0 0 0 0 0 F0 > (XEN) 03 000 00 0 0 0 0 0 0 0 30 > (XEN) 04 000 00 0 0 0 0 0 0 0 F1 > (XEN) 05 000 00 0 0 0 0 0 0 0 38 > (XEN) 06 000 00 0 0 0 0 0 0 0 40 > (XEN) 07 000 00 0 0 0 0 0 0 0 48 > (XEN) 08 000 00 0 0 0 0 0 0 0 50 > (XEN) 09 000 00 1 1 0 1 0 0 0 58 > (XEN) 0a 000 00 0 0 0 0 0 0 0 60 > (XEN) 0b 000 00 0 0 0 0 0 0 0 68 > (XEN) 0c 000 00 0 0 0 0 0 0 0 70 > (XEN) 0d 000 00 0 0 0 0 0 0 0 78 > (XEN) 0e 000 00 0 0 0 0 0 0 0 88 > (XEN) 0f 000 00 0 0 0 0 0 0 0 90 Dom0 tries to set the first 16 IO-APIC pins to edge. > (XEN) IOAPIC[0]: Set PCI routing entry (8-5 -> 0x38 -> IRQ 5 Mode:0 Active:0) > (XEN) IOAPIC[0]: Set PCI routing entry (8-6 -> 0x40 -> IRQ 6 Mode:0 Active:0) > (XEN) IOAPIC[0]: Set PCI routing entry (8-7 -> 0x48 -> IRQ 7 Mode:0 Active:0) > (XEN) IOAPIC[0]: Set PCI routing entry (8-8 -> 0x50 -> IRQ 8 Mode:0 Active:0) > (XEN) IOAPIC[0]: Set PCI routing entry (8-9 -> 0x58 -> IRQ 9 Mode:0 Active:0) > (XEN) IOAPIC[0]: Set PCI routing entry (8-10 -> 0x60 -> IRQ 10 Mode:0 Active:0) > (XEN) IOAPIC[0]: Set PCI routing entry (8-11 -> 0x68 -> IRQ 11 Mode:0 Active:0) > (XEN) IOAPIC[0]: Set PCI routing entry (8-12 -> 0x70 -> IRQ 12 Mode:0 Active:0) > (XEN) IOAPIC[0]: Set PCI routing entry (8-13 -> 0x78 -> IRQ 13 Mode:0 Active:0) > (XEN) IOAPIC[0]: Set PCI routing entry (8-14 -> 0x88 -> IRQ 14 Mode:0 Active:0) > (XEN) IOAPIC[0]: Set PCI routing entry (8-15 -> 0x90 -> IRQ 15 Mode:0 Active:0) > (XEN) Pin 8-9 already programmed Dom0 have a console. > [ 0.000000] Linux version 2.6.32-4-xen-amd64 (Debian 2.6.32-10~xen.1) (waldi@debian.org) (gcc version 4.3.4 (Debian 4.3.4-8) ) #1 SMP Tue Mar 16 07:46:55 UTC 2010 ACPI only reports overrides for 2 and 9. > [ 0.000000] Already setup the GSI :0 > [ 0.000000] Already setup the GSI :1 > [ 0.000000] Already setup the GSI :2 > [ 0.000000] Already setup the GSI :3 > [ 0.000000] Already setup the GSI :4 > [ 0.000000] ACPI: INT_SRC_OVR (bus 0 bus_irq 0 global_irq 2 high edge) > [ 0.000000] ACPI: INT_SRC_OVR (bus 0 bus_irq 9 global_irq 9 low level) > [ 0.000000] xen: sci override: source_irq=9 global_irq=9 trigger=c polarity=3 > [ 0.000000] xen_allocate_pirq: returning irq 9 for gsi 9 > [ 0.000000] Already setup the GSI :9 > [ 0.000000] xen: acpi sci 9 Readout after dom0 booted. Several other pins masked, all set to edge. > (XEN) NR Log Phy Mask Trig IRR Pol Stat Dest Deli Vect: > (XEN) 00 000 00 1 0 0 0 0 0 0 00 > (XEN) 01 009 09 0 0 0 0 0 0 0 81 > (XEN) 02 000 00 0 0 0 0 0 0 0 F0 > (XEN) 03 000 00 0 0 0 0 0 0 0 30 > (XEN) 04 000 00 0 0 0 0 0 0 0 F1 > (XEN) 05 000 00 1 0 0 0 0 0 0 38 > (XEN) 06 000 00 1 0 0 0 0 0 0 40 > (XEN) 07 000 00 1 0 0 0 0 0 0 48 > (XEN) 08 009 09 0 0 0 0 0 0 0 89 > (XEN) 09 000 00 0 0 0 0 0 0 0 58 > (XEN) 0a 000 00 1 0 0 0 0 0 0 60 > (XEN) 0b 000 00 1 0 0 0 0 0 0 68 > (XEN) 0c 009 09 0 0 0 0 0 0 0 79 > (XEN) 0d 000 00 1 0 0 0 0 0 0 78 > (XEN) 0e 000 00 1 0 0 0 0 0 0 88 > (XEN) 0f 000 00 1 0 0 0 0 0 0 90 Load of driver which drives interrupt 14. It tries to reprogram it as level driven. > [ 43.620022] xen_allocate_pirq: returning irq 14 for gsi 14 > (XEN) Pin 8-14 already programmed > (XEN) IOAPIC[0]: Set PCI routing entry (8-14 -> 0x88 -> IRQ 14 Mode:1 Active:1) Readout after. > (XEN) NR Log Phy Mask Trig IRR Pol Stat Dest Deli Vect: > (XEN) 00 000 00 1 0 0 0 0 0 0 00 > (XEN) 01 009 09 0 0 0 0 0 0 0 81 > (XEN) 02 000 00 0 0 0 0 0 0 0 F0 > (XEN) 03 000 00 0 0 0 0 0 0 0 30 > (XEN) 04 000 00 0 0 0 0 0 0 0 F1 > (XEN) 05 000 00 1 0 0 0 0 0 0 38 > (XEN) 06 000 00 1 0 0 0 0 0 0 40 > (XEN) 07 000 00 1 0 0 0 0 0 0 48 > (XEN) 08 009 09 0 0 0 0 0 0 0 89 > (XEN) 09 000 00 0 0 0 0 0 0 0 58 > (XEN) 0a 000 00 1 0 0 0 0 0 0 60 > (XEN) 0b 000 00 1 0 0 0 0 0 0 68 > (XEN) 0c 009 09 0 0 0 0 0 0 0 79 > (XEN) 0d 000 00 1 0 0 0 0 0 0 78 > (XEN) 0e 008 08 0 1 0 1 0 0 0 B2 > (XEN) 0f 000 00 1 0 0 0 0 0 0 90 I did some digging and found similar code that disallows reprogramming of IO-APIC pins in arch/x86/kernel/apic/io_apic.c:io_apic_set_pci_routing So this behaviour is correct. So the question is: Is it wrong for the kernel to do register_gsi calls early in bootup for interrupts it does not know anything about? Bastian -- Even historians fail to learn from history -- they repeat the same mistakes. -- John Gill, "Patterns of Force", stardate 2534.7