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    SubjectRe: [PATCH v5 06/27] irq_domain/powerpc: eliminate irq_map; use irq_alloc_desc() instead
    Date
    Grant Likely <grant.likely@secretlab.ca> writes:

    > Can you dump out /debug/powerpc/virq_mapping from both before and
    > after the irq_map patch is applied?

    before:
    virq hwirq chip name chip data host name
    16 0x00000 MPIC 1 0xc00000017a010000 /ht@0,f2000000/pci@1/mac-io@7/mpic@40000
    21 0x00001 MPIC 1 0xc00000017a010000 /ht@0,f2000000/pci@1/mac-io@7/mpic@40000
    24 0x00002 MPIC 1 0xc00000017a010000 /ht@0,f2000000/pci@1/mac-io@7/mpic@40000
    25 0x00019 MPIC 1 0xc00000017a010000 /ht@0,f2000000/pci@1/mac-io@7/mpic@40000
    26 0x0001a MPIC 1 0xc00000017a010000 /ht@0,f2000000/pci@1/mac-io@7/mpic@40000
    27 0x0001b MPIC 1 0xc00000017a010000 /ht@0,f2000000/pci@1/mac-io@7/mpic@40000
    28 0x0001c MPIC 1 0xc00000017a010000 /ht@0,f2000000/pci@1/mac-io@7/mpic@40000
    29 0x0003d MPIC 1 0xc00000017a010000 /ht@0,f2000000/pci@1/mac-io@7/mpic@40000
    30 0x0001e MPIC 1 0xc00000017a010000 /ht@0,f2000000/pci@1/mac-io@7/mpic@40000
    31 0x0003c MPIC 1 0xc00000017a010000 /ht@0,f2000000/pci@1/mac-io@7/mpic@40000
    39 0x00027 MPIC 1 0xc00000017a010000 /ht@0,f2000000/pci@1/mac-io@7/mpic@40000
    40 0x00028 MPIC 1 0xc00000017a010000 /ht@0,f2000000/pci@1/mac-io@7/mpic@40000
    41 0x00029 MPIC 1 0xc00000017a010000 /ht@0,f2000000/pci@1/mac-io@7/mpic@40000
    42 0x0002a MPIC 2 0xc00000017a011000 /u3@0,f8000000/mpic@f8040000
    47 0x0002f MPIC 1 0xc00000017a010000 /ht@0,f2000000/pci@1/mac-io@7/mpic@40000
    59 0x000fb MPIC 1 0xc00000017a010000 /ht@0,f2000000/pci@1/mac-io@7/mpic@40000
    60 0x000fc MPIC 1 0xc00000017a010000 /ht@0,f2000000/pci@1/mac-io@7/mpic@40000
    61 0x000fd MPIC 1 0xc00000017a010000 /ht@0,f2000000/pci@1/mac-io@7/mpic@40000
    62 0x000fe MPIC 1 0xc00000017a010000 /ht@0,f2000000/pci@1/mac-io@7/mpic@40000
    63 0x0003f MPIC 1 0xc00000017a010000 /ht@0,f2000000/pci@1/mac-io@7/mpic@40000

    after:
    virq hwirq chip name chip data host name
    16 0x00000 MPIC 1 0xc00000017a010000 /ht@0,f2000000/pci@1/mac-io@7/mpic@40000
    21 0x00001 MPIC 1 0xc00000017a010000 /ht@0,f2000000/pci@1/mac-io@7/mpic@40000
    24 0x00002 MPIC 1 0xc00000017a010000 /ht@0,f2000000/pci@1/mac-io@7/mpic@40000
    25 0x00019 MPIC 1 0xc00000017a010000 /ht@0,f2000000/pci@1/mac-io@7/mpic@40000
    26 0x0001a MPIC 1 0xc00000017a010000 /ht@0,f2000000/pci@1/mac-io@7/mpic@40000
    27 0x0001b MPIC 1 0xc00000017a010000 /ht@0,f2000000/pci@1/mac-io@7/mpic@40000
    28 0x0001c MPIC 1 0xc00000017a010000 /ht@0,f2000000/pci@1/mac-io@7/mpic@40000
    30 0x0001e MPIC 1 0xc00000017a010000 /ht@0,f2000000/pci@1/mac-io@7/mpic@40000
    39 0x00027 MPIC 1 0xc00000017a010000 /ht@0,f2000000/pci@1/mac-io@7/mpic@40000
    40 0x00028 MPIC 1 0xc00000017a010000 /ht@0,f2000000/pci@1/mac-io@7/mpic@40000
    41 0x00029 MPIC 1 0xc00000017a010000 /ht@0,f2000000/pci@1/mac-io@7/mpic@40000
    42 0x0002a MPIC 2 0xc00000017a011000 /u3@0,f8000000/mpic@f8040000
    47 0x0002f MPIC 1 0xc00000017a010000 /ht@0,f2000000/pci@1/mac-io@7/mpic@40000
    59 0x000fb MPIC 1 0xc00000017a010000 /ht@0,f2000000/pci@1/mac-io@7/mpic@40000
    60 0x000fc MPIC 1 0xc00000017a010000 /ht@0,f2000000/pci@1/mac-io@7/mpic@40000
    61 0x000fd MPIC 1 0xc00000017a010000 /ht@0,f2000000/pci@1/mac-io@7/mpic@40000
    62 0x000fe MPIC 1 0xc00000017a010000 /ht@0,f2000000/pci@1/mac-io@7/mpic@40000
    63 0x0003f MPIC 1 0xc00000017a010000 /ht@0,f2000000/pci@1/mac-io@7/mpic@40000
    64 0x0003d MPIC 1 0xc00000017a010000 /ht@0,f2000000/pci@1/mac-io@7/mpic@40000
    65 0x0003c MPIC 1 0xc00000017a010000 /ht@0,f2000000/pci@1/mac-io@7/mpic@40000

    But I have NR_IRQS=64. Bounds checking missing? Irqs 64/65 are related
    to the sound chip (headphone-detect and line-out-detect).

    When reconfiguring with NR_IRQS=128 interrupts are working again, but I
    still see a lot of spurious interrupts, and the X server is still broken
    (no input works, but I still don't know whether that is an unrelated
    bug).

    This is a sample of /proc/interrupts from 3.3 (with NR_IRQS=64):
    CPU0 CPU1
    16: 2039 6070 MPIC 1 Level sata_svw
    21: 0 0 MPIC 1 Edge i2sbus: i2s-a (tx)
    22: 12 20 MPIC 1 Level
    23: 14 18 MPIC 1 Level
    24: 0 0 MPIC 1 Edge i2sbus: i2s-a (rx)
    25: 3 0 MPIC 1 Level VIA-PMU
    26: 16 62 MPIC 1 Level keywest i2c
    27: 0 1 MPIC 1 Level ohci_hcd:usb2
    28: 0 1 MPIC 1 Level ohci_hcd:usb3
    29: 0 0 MPIC 1 Edge headphone-detect
    30: 0 0 MPIC 1 Level i2sbus: i2s-a (control)
    31: 0 0 MPIC 1 Edge line-output-detect
    39: 22 64 MPIC 1 Level pata-pci-macio
    40: 0 2 MPIC 1 Level firewire_ohci
    41: 52 147 MPIC 1 Level eth0
    42: 1732 5053 MPIC 2 Level keywest i2c
    47: 0 0 MPIC 1 Level GPIO1 ADB
    59: 0 0 MPIC 1 Edge ipi call function
    60: 2064 1940 MPIC 1 Edge ipi reschedule
    61: 3406 945 MPIC 1 Edge ipi call function single
    62: 0 0 MPIC 1 Edge ipi debugger
    63: 39 91 MPIC 1 Level ehci_hcd:usb1, ohci_hcd:usb4, ohci_hcd:usb5
    LOC: 3503 3719 Local timer interrupts
    SPU: 2 0 Spurious interrupts
    CNT: 0 0 Performance monitoring interrupts
    MCE: 0 0 Machine check exceptions

    This is a sample of /proc/interrupts from 3.4-rc1 (with NR_IRQS=128):
    CPU0 CPU1
    16: 2603 7596 MPIC 1 Level sata_svw
    21: 1 0 MPIC 1 Edge i2sbus: i2s-a (tx)
    22: 13 19 MPIC 1 Level
    23: 8 24 MPIC 1 Level
    24: 0 1 MPIC 1 Edge i2sbus: i2s-a (rx)
    25: 2 1 MPIC 1 Level VIA-PMU
    26: 21 57 MPIC 1 Level keywest i2c
    27: 0 1 MPIC 1 Level ohci_hcd:usb2
    28: 0 1 MPIC 1 Level ohci_hcd:usb3
    30: 0 0 MPIC 1 Level i2sbus: i2s-a (control)
    39: 39 131 MPIC 1 Level pata-pci-macio
    40: 2 2 MPIC 1 Level firewire_ohci
    41: 93 268 MPIC 1 Level eth0
    42: 8569 24140 MPIC 2 Level keywest i2c
    47: 0 0 MPIC 1 Level GPIO1 ADB
    60: 1 0 MPIC 1 Edge line-output-detect
    61: 1 0 MPIC 1 Edge headphone-detect
    63: 153 502 MPIC 1 Level ehci_hcd:usb1, ohci_hcd:usb4, ohci_hcd:usb5
    123: 0 0 MPIC 1 Edge ipi call function
    124: 1978 2349 MPIC 1 Edge ipi reschedule
    125: 2356 1816 MPIC 1 Edge ipi call function single
    126: 0 0 MPIC 1 Edge ipi debugger
    LOC: 4417 7985 Local timer interrupts
    SPU: 9586 25811 Spurious interrupts
    CNT: 0 0 Performance monitoring interrupts
    MCE: 0 0 Machine check exceptions

    Andreas.

    --
    Andreas Schwab, schwab@linux-m68k.org
    GPG Key fingerprint = 58CA 54C7 6D53 942B 1756 01D3 44D5 214B 8276 4ED5
    "And now for something completely different."


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