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authorRonald G. Minnich <rminnich@gmail.com>2013-07-22 20:17:18 +0200
committerRonald G. Minnich <rminnich@gmail.com>2013-07-22 20:46:51 +0200
commitb5e777c433642950fbe6e907a234995ed7f34b8d (patch)
treea8abdfea9064d8c16c095878a1ea9020c0426e28 /src/arch
parent4c2ebeba78e437df2d156a4c68f1fb15b62926f5 (diff)
downloadcoreboot-b5e777c433642950fbe6e907a234995ed7f34b8d.tar.xz
X86: make the SIPI num_starts a config variable
The code to figure out how to set num_starts was starting to get kludgy. It's a constant for a given CPU; constants should be constant; make it a config variable. This change includes an example of how to override it. Build but not boot tested; drivers welcome. Change-Id: Iddd906a707bb16251615c7b42f2bfb5a044379b4 Signed-off-by: Ronald G. Minnich <rminnich@gmail.com> Reviewed-on: http://review.coreboot.org/3796 Tested-by: build bot (Jenkins) Reviewed-by: Marc Jones <marc.jones@se-eng.com> Reviewed-by: Bruce Griffith <Bruce.Griffith@se-eng.com>
Diffstat (limited to 'src/arch')
-rw-r--r--src/arch/x86/Kconfig9
1 files changed, 9 insertions, 0 deletions
diff --git a/src/arch/x86/Kconfig b/src/arch/x86/Kconfig
index 581a0484f7..0a21fcc99a 100644
--- a/src/arch/x86/Kconfig
+++ b/src/arch/x86/Kconfig
@@ -48,6 +48,15 @@ config MAX_REBOOT_CNT
int
default 3
+# This is something you almost certainly don't want to mess with.
+# How many SIPIs do we send when starting up APs and cores?
+# The answer in 2000 or so was '2'. Nowadays, on many systems,
+# it is 1. Set a safe default here, and you can override it
+# on reasonable platforms.
+config NUM_IPI_STARTS
+ int
+ default 2
+
# We had to rename the choice options under arch/ because otherwise
# the options would conflict between different architectures despite
# the if ARCH_xxx guarding the arch/xxx/Kconfig sourcing.