x86, UV: Fix UV2 hub part number

There was a mixup when the SGI UV2 hub chip was sent to be
fabricated, and it ended up with the wrong part number in the
HRP_NODE_ID mmr. Future versions of the chip will (may) have the
correct part number. Change the UV infrastructure to recognize
both part numbers as valid IDs of a UV2 hub chip.

Signed-off-by: Jack Steiner <steiner@sgi.com>
Link: http://lkml.kernel.org/r/20111129210058.GA20452@sgi.com
Signed-off-by: Ingo Molnar <mingo@elte.hu>

1 files changed, 2 insertions, 0 deletions

diff --git a/arch/x86/kernel/apic/x2apic_uv_x.c b/arch/x86/kernel/apic/x2apic_uv_x.c
index 62ae3001ae02..9d59bbacd4e3 100644
--- a/arch/x86/kernel/apic/x2apic_uv_x.c
+++ b/arch/x86/kernel/apic/x2apic_uv_x.c
@@ -93,6 +93,8 @@ static int __init early_get_pnodeid(void)
 
         if (node_id.s.part_number == UV2_HUB_PART_NUMBER)
                 uv_min_hub_revision_id += UV2_HUB_REVISION_BASE - 1;
+        if (node_id.s.part_number == UV2_HUB_PART_NUMBER_X)
+                uv_min_hub_revision_id += UV2_HUB_REVISION_BASE - 1;
 
         uv_hub_info->hub_revision = uv_min_hub_revision_id;
         pnode = (node_id.s.node_id >> 1) & ((1 << m_n_config.s.n_skt) - 1);