ebiederm@xxxxxxxxxxxx (Eric W. Biederman) writes: > It appears there are a few systems in the wild that use acpi > interrupt source overrides to report a gsi > 16 is an isa irq. > > This breaks all kinds of assumptions I figure any BIOS doing that > probably should be shot as that is very much not a conservative position. > > That said acpi appears to allow this insanity and on the basis of being > liberal in what we accept we should try to do something reasonable, and > keep our notions of gsi, isa irq, and linux irq as straight as we can. > > To that end this patchset slightly modifies the gsi to linux irq > mapping. Making it a 1 to 1 identity mapping except for the first 16 > gsis. If those gsis are isa irqs (the typical and default acpi > configuration) they will be mapped into the first 16 irqs. If those > first 16 gsis are not isa irqs they will be given a linux irq number > just past the last gsi. Allowing us the chance to use them. > > This patchset is my attempt to straighten out our understanding of which > kind of irq name is used where and the cleanups used to get there. > > Thanks to Yinghai Lu <yinghai@xxxxxxxxxx> for taking the first stab at > this and finding that there is a real world problem here. This patchset > is inspired by his work, but little of it remains the same. > > This patchset lies in the weird world between the acpi and x86 and ia64. > Since most of the changes are x86 related I think it makes most sense > to go via the x86 tree. > > v2: Recognize that gsi_end is last gsi for an ioapic not one past the end. > Since I use gsi_end widely in my patchset a respin of many of the patches > made sense. > > Eric W. Biederman (15): > x86 acpi/irq: Introduce apci_isa_irq_to_gsi > x86 acpi/irq: Teach acpi_get_override_irq to take a gsi not an isa_irq > x86 acpi/irq: pci device dev->irq is an isa irq not a gsi > x86 acpi/irq: Fix acpi_sci_ioapic_setup so it has both bus_irq and gsi > x86 acpi/irq: Generalize mp_config_acpi_legacy_irqs > x86 ioapic: Only export mp_find_ioapic and mp_find_ioapic_pin in io_apic.h > x86 ioapic: Fix io_apic_redir_entries to return the number of entries. > x86 ioapic: Fix the types of gsi values > x86 ioapic: Teach mp_register_ioapic to compute a global gsi_end > x86 ioapic: In mpparse use mp_register_ioapic > x86 ioapic: Move nr_ioapic_registers calculation to mp_register_ioapic. > x86 ioapic: Optimize pin_2_irq > x86 ioapic: Simplify probe_nr_irqs_gsi. > x86 acpi/irq: Handle isa irqs that are not identity mapped to gsi's. > x86 irq: Kill io_apic_renumber_irq > > arch/ia64/kernel/acpi.c | 8 ++ > arch/x86/include/asm/io_apic.h | 12 ++-- > arch/x86/include/asm/mpspec.h | 10 --- > arch/x86/kernel/acpi/boot.c | 133 ++++++++++++++++++++++++-------------- > arch/x86/kernel/apic/es7000_32.c | 19 ------ > arch/x86/kernel/apic/io_apic.c | 99 +++++++++++++--------------- > arch/x86/kernel/mpparse.c | 25 +------- > arch/x86/kernel/sfi.c | 4 +- > drivers/acpi/pci_irq.c | 8 ++- > include/linux/acpi.h | 5 +- > 10 files changed, 154 insertions(+), 169 deletions(-) ping Where are we at with this patchset? Eric -- To unsubscribe from this list: send the line "unsubscribe linux-acpi" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
