>
> Add kernel support for new ACPI "sapic" tables that contain 16-bit APICIDs.
> This patch simply adds parsing of an optional SAPIC table if present.
> Otherwise, the traditional local APIC table is used.
>
> Note: the SAPIC table is not a new ACPI table - it exists on other architectures
> but is not currently recognized by x86_64.
>
>
> Signed-off-by: Jack Steiner <steiner@sgi.com>
>
>
> ---
> arch/x86/kernel/acpi/boot.c | 26 ++++++++++++++++++++++++--
> 1 file changed, 24 insertions(+), 2 deletions(-)
>
> Index: linux/arch/x86/kernel/acpi/boot.c
> ===================================================================
> --- linux.orig/arch/x86/kernel/acpi/boot.c 2008-03-21 15:37:05.000000000 -0500
> +++ linux/arch/x86/kernel/acpi/boot.c 2008-03-21 15:40:46.000000000 -0500
> @@ -261,6 +261,24 @@ acpi_parse_lapic(struct acpi_subtable_he
> }
>
> static int __init
> +acpi_parse_sapic(struct acpi_subtable_header *header, const unsigned long end)
> +{
> + struct acpi_madt_local_sapic *processor = NULL;
> +
> + processor = (struct acpi_madt_local_sapic *)header;
> +
> + if (BAD_MADT_ENTRY(processor, end))
> + return -EINVAL;
> +
> + acpi_table_print_madt_entry(header);
> +
> + mp_register_lapic((processor->id << 8) | processor->eid,/* APIC ID */
> + processor->lapic_flags & ACPI_MADT_ENABLED); /* Enabled? */
> +
> + return 0;
> +}
> +
> +static int __init
> acpi_parse_lapic_addr_ovr(struct acpi_subtable_header * header,
> const unsigned long end)
> {
> @@ -753,8 +771,12 @@ static int __init acpi_parse_madt_lapic_
>
> mp_register_lapic_address(acpi_lapic_addr);
>
> - count = acpi_table_parse_madt(ACPI_MADT_TYPE_LOCAL_APIC, acpi_parse_lapic,
> - MAX_APICS);
> + count = acpi_table_parse_madt(ACPI_MADT_TYPE_LOCAL_SAPIC,
> + acpi_parse_sapic, MAX_APICS);
> +
> + if (!count)
> + count = acpi_table_parse_madt(ACPI_MADT_TYPE_LOCAL_APIC,
> + acpi_parse_lapic, MAX_APICS);
> if (!count) {
> printk(KERN_ERR PREFIX "No LAPIC entries present\n");
> /* TBD: Cleanup to allow fallback to MPS */
> --
> To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
> the body of a message to
majordomo@vger.kernel.org
> More majordomo info at
http://vger.kernel.org/majordomo-info.html
> Please read the FAQ at
http://www.tux.org/lkml/
>
