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Commit b1bb248a authored by Kenji Kaneshige's avatar Kenji Kaneshige Committed by Greg Kroah-Hartman
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[PATCH] ACPI based I/O APIC hot-plug: add interfaces 



This patch adds the following new interfaces for I/O xAPIC
hotplug. The implementation of these interfaces depends on each
architecture.

    o int acpi_register_ioapic(acpi_handle handle, u64 phys_addr,
			       u32 gsi_base);

        This new interface is to add a new I/O xAPIC specified by
        phys_addr and gsi_base pair. phys_addr is the physical address
        to which the I/O xAPIC is mapped and gsi_base is global system
        interrupt base of the I/O xAPIC. acpi_register_ioapic returns
        0 on success, or negative value on error.

    o int acpi_unregister_ioapic(acpi_handle handle, u32 gsi_base);

        This new interface is to remove a I/O xAPIC specified by
        gsi_base. acpi_unregister_ioapic returns 0 on success, or
        negative value on error.

Signed-off-by: default avatarKenji Kaneshige <kaneshige.kenji@jp.fujitsu.com>
Signed-off-by: default avatarAndrew Morton <akpm@osdl.org>
Signed-off-by: default avatarGreg Kroah-Hartman <gregkh@suse.de>
parent 8d50e332

arch/i386/kernel/acpi/boot.c

+16 −0
Original line number Diff line number Diff line
@@ -507,6 +507,22 @@ acpi_unmap_lsapic(int cpu) 
EXPORT_SYMBOL(acpi_unmap_lsapic);

#endif /* CONFIG_ACPI_HOTPLUG_CPU */



int

acpi_register_ioapic(acpi_handle handle, u64 phys_addr, u32 gsi_base)

{

	/* TBD */

	return -EINVAL;

}

EXPORT_SYMBOL(acpi_register_ioapic);



int

acpi_unregister_ioapic(acpi_handle handle, u32 gsi_base)

{

	/* TBD */

	return -EINVAL;

}

EXPORT_SYMBOL(acpi_unregister_ioapic);



static unsigned long __init

acpi_scan_rsdp (

	unsigned long		start,

arch/ia64/kernel/acpi.c

+17 −0
Original line number Diff line number Diff line
@@ -825,4 +825,21 @@ acpi_map_iosapic (acpi_handle handle, u32 depth, void *context, void **ret) 
	return AE_OK;

}

#endif /* CONFIG_NUMA */



int

acpi_register_ioapic (acpi_handle handle, u64 phys_addr, u32 gsi_base)

{

	/* TBD */

	return -EINVAL;

}

EXPORT_SYMBOL(acpi_register_ioapic);



int

acpi_unregister_ioapic (acpi_handle handle, u32 gsi_base)

{

	/* TBD */

	return -EINVAL;

}

EXPORT_SYMBOL(acpi_unregister_ioapic);



#endif /* CONFIG_ACPI_BOOT */

include/linux/acpi.h

+3 −0
Original line number Diff line number Diff line
@@ -407,6 +407,9 @@ int acpi_map_lsapic(acpi_handle handle, int *pcpu); 
int acpi_unmap_lsapic(int cpu);

#endif /* CONFIG_ACPI_HOTPLUG_CPU */



int acpi_register_ioapic(acpi_handle handle, u64 phys_addr, u32 gsi_base);

int acpi_unregister_ioapic(acpi_handle handle, u32 gsi_base);



extern int acpi_mp_config;



extern u32 pci_mmcfg_base_addr;