From 991c15053a3fc209d76f03c73d4f0621025c9452 Mon Sep 17 00:00:00 2001 From: Heiko Carstens Date: Tue, 13 Nov 2012 10:26:37 +0200 Subject: s390: add zEC12 code generation support Allow to generate code that only runs on zEC12 machines. Also add a check which prevents the kernel to run on machines which do not have any of the following new facilities installed: - (48) decimal-floating-point zoned-conversion - (49) execution-hint - (49) load-and-trap - (49) miscellaneous-instruction-extensions - (49) processor-assist - (50) constrained transactional-execution - (73) transactional-execution 48, 49, 50 and 73 are the bit numbers of the facility indications for each of the required facilities. Note that we assume that user-space gets compiled with the same compiler options, therefore we also test for a dfp facility even if the kernel doesn't make use of it. Signed-off-by: Heiko Carstens --- arch/s390/Kconfig | 11 +++++++++++ 1 file changed, 11 insertions(+) (limited to 'arch/s390/Kconfig') diff --git a/arch/s390/Kconfig b/arch/s390/Kconfig index d385f39..1bf4b29 100644 --- a/arch/s390/Kconfig +++ b/arch/s390/Kconfig @@ -169,6 +169,10 @@ config HAVE_MARCH_Z196_FEATURES def_bool n select HAVE_MARCH_Z10_FEATURES +config HAVE_MARCH_ZEC12_FEATURES + def_bool n + select HAVE_MARCH_Z196_FEATURES + choice prompt "Processor type" default MARCH_G5 @@ -220,6 +224,13 @@ config MARCH_Z196 (2818 and 2817 series). The kernel will be slightly faster but will not work on older machines. +config MARCH_ZEC12 + bool "IBM zEC12" + select HAVE_MARCH_ZEC12_FEATURES if 64BIT + help + Select this to enable optimizations for IBM zEC12 (2827 series). The + kernel will be slightly faster but will not work on older machines. + endchoice config 64BIT -- cgit v1.1