s390: add z13 code generation support

Allow to generate code that only runs on z13 machines.

Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>

4 files changed, 26 insertions, 1 deletions

diff --git a/arch/s390/Kconfig b/arch/s390/Kconfig
index e79c3eab40b9..06c6d9ab5a8d 100644
--- a/arch/s390/Kconfig
+++ b/arch/s390/Kconfig
@@ -185,6 +185,10 @@ config HAVE_MARCH_ZEC12_FEATURES
         def_bool n
         select HAVE_MARCH_Z196_FEATURES
 
+config HAVE_MARCH_Z13_FEATURES
+        def_bool n
+        select HAVE_MARCH_ZEC12_FEATURES
+
 choice
         prompt "Processor type"
         default MARCH_G5
@@ -244,6 +248,14 @@ config MARCH_ZEC12
           2827 series). The kernel will be slightly faster but will not work on
           older machines.
 
+config MARCH_Z13
+        bool "IBM z13"
+        select HAVE_MARCH_Z13_FEATURES if 64BIT
+        help
+          Select this to enable optimizations for IBM z13 (2964 series).
+          The kernel will be slightly faster but will not work on older
+          machines.
+
 endchoice
 
 config MARCH_G5_TUNE
@@ -267,6 +279,9 @@ config MARCH_Z196_TUNE
 config MARCH_ZEC12_TUNE
         def_bool TUNE_ZEC12 || MARCH_ZEC12 && TUNE_DEFAULT
 
+config MARCH_Z13_TUNE
+        def_bool TUNE_Z13 || MARCH_Z13 && TUNE_DEFAULT
+
 choice
         prompt "Tune code generation"
         default TUNE_DEFAULT
@@ -305,6 +320,9 @@ config TUNE_Z196
 config TUNE_ZEC12
         bool "IBM zBC12 and zEC12"
 
+config TUNE_Z13
+        bool "IBM z13"
+
 endchoice
 
 config 64BIT
diff --git a/arch/s390/Makefile b/arch/s390/Makefile
index 878e67973151..e742ec5de9a7 100644
--- a/arch/s390/Makefile
+++ b/arch/s390/Makefile
@@ -42,6 +42,7 @@ mflags-$(CONFIG_MARCH_Z9_109) := -march=z9-109
 mflags-$(CONFIG_MARCH_Z10)    := -march=z10
 mflags-$(CONFIG_MARCH_Z196)   := -march=z196
 mflags-$(CONFIG_MARCH_ZEC12)  := -march=zEC12
+mflags-$(CONFIG_MARCH_Z13)   := -march=z13
 
 aflags-y += $(mflags-y)
 cflags-y += $(mflags-y)
@@ -53,6 +54,7 @@ cflags-$(CONFIG_MARCH_Z9_109_TUNE)	+= -mtune=z9-109
 cflags-$(CONFIG_MARCH_Z10_TUNE)         += -mtune=z10
 cflags-$(CONFIG_MARCH_Z196_TUNE)        += -mtune=z196
 cflags-$(CONFIG_MARCH_ZEC12_TUNE)       += -mtune=zEC12
+cflags-$(CONFIG_MARCH_Z13_TUNE) += -mtune=z13
 
 #KBUILD_IMAGE is necessary for make rpm
 KBUILD_IMAGE    :=arch/s390/boot/image
diff --git a/arch/s390/kernel/head.S b/arch/s390/kernel/head.S
index d62eee11f0b5..132f4c9ade60 100644
--- a/arch/s390/kernel/head.S
+++ b/arch/s390/kernel/head.S
@@ -436,7 +436,9 @@ ENTRY(startup_kdump)
 # followed by the facility words.
 
 #if defined(CONFIG_64BIT)
-#if defined(CONFIG_MARCH_ZEC12)
+#if defined(CONFIG_MARCH_Z13)
+        .long 3, 0xc100eff2, 0xf46ce800, 0x00400000
+#elif defined(CONFIG_MARCH_ZEC12)
         .long 3, 0xc100eff2, 0xf46ce800, 0x00400000
 #elif defined(CONFIG_MARCH_Z196)
         .long 2, 0xc100eff2, 0xf46c0000
diff --git a/arch/s390/kernel/setup.c b/arch/s390/kernel/setup.c
index 4e532c67832f..bfac77ada4f2 100644
--- a/arch/s390/kernel/setup.c
+++ b/arch/s390/kernel/setup.c
@@ -810,6 +810,9 @@ static void __init setup_hwcaps(void)
         case 0x2828:
                 strcpy(elf_platform, "zEC12");
                 break;
+        case 0x2964:
+                strcpy(elf_platform, "z13");
+                break;
         }
 }