[PATCH 03/10] Limit MPS tables to 15 CPUs to fit with 4-bit APIC addressing.

[Magnus Christensson]

---
 src/mptable.c |    6 ++++++
 1 files changed, 6 insertions(+), 0 deletions(-)

diff --git a/src/mptable.c b/src/mptable.c
index 525188d..7e8486d 100644
--- a/src/mptable.c
+++ b/src/mptable.c
@@ -86,6 +86,12 @@ mptable_init(void)
             cpu->cpusignature = 0x600;
             cpu->featureflag = 0x201;
         }
+
+        /* Limit the CPU count to 15 in the MPS tables, which is the limit in
+           the 4-bit legacy APIC addressing scheme. Operating systems can find
+           all CPUs through the ACPI tables. */
+        if (actual_cpu_count >= 15)
+            break;
     }

config->entrycount = actual_cpu_count + 2 + 16;