From: Martin Schwidefsky <schwidefsky@de.ibm.com>
Date: Wed, 6 Feb 2019 08:22:11 +0100
Subject: s390: add support for IBM z15 machines
Git-commit: a0e2251132995b962281aa80ab54a9288f9e0b6b
Patch-mainline: v5.4-rc1
References: bsc#1156538 LTC#182406
Add detection for machine types 0x8562 and 8x8561 and set the ELF platform
name to z15. Add the miscellaneous-instruction-extension 3 facility to
the list of facilities for z15.
And allow to generate code that only runs on a z15 machine.
Reviewed-by: Christian Borntraeger <borntraeger@de.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com>
Acked-by: Petr Tesarik <ptesarik@suse.com>
---
arch/s390/Kconfig | 18 ++++++++++++++++++
arch/s390/Makefile | 2 ++
arch/s390/kernel/setup.c | 4 ++++
arch/s390/tools/gen_facilities.c | 3 +++
4 files changed, 27 insertions(+)
--- a/arch/s390/Kconfig
+++ b/arch/s390/Kconfig
@@ -236,6 +236,10 @@ config HAVE_MARCH_Z14_FEATURES
def_bool n
select HAVE_MARCH_Z13_FEATURES
+config HAVE_MARCH_Z15_FEATURES
+ def_bool n
+ select HAVE_MARCH_Z14_FEATURES
+
choice
prompt "Processor type"
default MARCH_Z196
@@ -307,6 +311,14 @@ config MARCH_Z14
and 3906 series). The kernel will be slightly faster but will not
work on older machines.
+config MARCH_Z15
+ bool "IBM z15"
+ select HAVE_MARCH_Z15_FEATURES
+ help
+ Select this to enable optimizations for IBM z15 (8562
+ and 8561 series). The kernel will be slightly faster but will not
+ work on older machines.
+
endchoice
config MARCH_Z900_TUNE
@@ -333,6 +345,9 @@ config MARCH_Z13_TUNE
config MARCH_Z14_TUNE
def_bool TUNE_Z14 || MARCH_Z14 && TUNE_DEFAULT
+config MARCH_Z15_TUNE
+ def_bool TUNE_Z15 || MARCH_Z15 && TUNE_DEFAULT
+
choice
prompt "Tune code generation"
default TUNE_DEFAULT
@@ -377,6 +392,9 @@ config TUNE_Z13
config TUNE_Z14
bool "IBM z14"
+config TUNE_Z15
+ bool "IBM z15"
+
endchoice
config 64BIT
--- a/arch/s390/Makefile
+++ b/arch/s390/Makefile
@@ -45,6 +45,7 @@ mflags-$(CONFIG_MARCH_Z196) := -march=
mflags-$(CONFIG_MARCH_ZEC12) := -march=zEC12
mflags-$(CONFIG_MARCH_Z13) := -march=z13
mflags-$(CONFIG_MARCH_Z14) := -march=z14
+mflags-$(CONFIG_MARCH_Z15) := -march=z15
export CC_FLAGS_MARCH := $(mflags-y)
@@ -59,6 +60,7 @@ cflags-$(CONFIG_MARCH_Z196_TUNE) += -mtu
cflags-$(CONFIG_MARCH_ZEC12_TUNE) += -mtune=zEC12
cflags-$(CONFIG_MARCH_Z13_TUNE) += -mtune=z13
cflags-$(CONFIG_MARCH_Z14_TUNE) += -mtune=z14
+cflags-$(CONFIG_MARCH_Z15_TUNE) += -mtune=z15
cflags-y += -Wa,-I$(srctree)/arch/$(ARCH)/include
--- a/arch/s390/kernel/setup.c
+++ b/arch/s390/kernel/setup.c
@@ -990,6 +990,10 @@ static int __init setup_hwcaps(void)
case 0x3907:
strcpy(elf_platform, "z14");
break;
+ case 0x8561:
+ case 0x8562:
+ strcpy(elf_platform, "z15");
+ break;
}
/*
--- a/arch/s390/tools/gen_facilities.c
+++ b/arch/s390/tools/gen_facilities.c
@@ -58,6 +58,9 @@ static struct facility_def facility_defs
#ifdef CONFIG_HAVE_MARCH_Z14_FEATURES
58, /* miscellaneous-instruction-extension 2 */
#endif
+#ifdef CONFIG_HAVE_MARCH_Z15_FEATURES
+ 61, /* miscellaneous-instruction-extension 3 */
+#endif
-1 /* END */
}
},