[PATCH] ACPI based I/O APIC hot-plug: add interfaces (b1bb248a) · Commits · 戴 / test

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:

Kenji Kaneshige <kaneshige.kenji@jp.fujitsu.com> Signed-off-by:

Andrew Morton <akpm@osdl.org> Signed-off-by:

Greg Kroah-Hartman <gregkh@suse.de>

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;

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