From: Martin Schwidefsky <schwidefsky@xxxxxxxxxx>
This patch adds the code generation option for IBM System z10 and
adds a check in head[31,64].S to prevents the execution of a kernel
compiled for a new processor type on an old machine.
Signed-off-by: Martin Schwidefsky <schwidefsky@xxxxxxxxxx>
---
arch/s390/Kconfig | 8 +++++++
arch/s390/Makefile | 1
arch/s390/kernel/head.S | 49 ++++++++++++++++++++++++++++++++++++++++++++++
arch/s390/kernel/head31.S | 27 ++-----------------------
arch/s390/kernel/head64.S | 23 ---------------------
5 files changed, 61 insertions(+), 47 deletions(-)
Index: quilt-2.6/arch/s390/Kconfig
===================================================================
--- quilt-2.6.orig/arch/s390/Kconfig
+++ quilt-2.6/arch/s390/Kconfig
@@ -230,6 +230,14 @@ config MARCH_Z9_109
Class (z9 BC). The kernel will be slightly faster but will not
work on older machines such as the z990, z890, z900, and z800.
+config MARCH_Z10
+ bool "IBM System z10"
+ help
+ Select this to enable optimizations for IBM System z10. The
+ kernel will be slightly faster but will not work on older
+ machines such as the z990, z890, z900, z800, z9-109, z9-ec
+ and z9-bc.
+
endchoice
config PACK_STACK
Index: quilt-2.6/arch/s390/kernel/head31.S
===================================================================
--- quilt-2.6.orig/arch/s390/kernel/head31.S
+++ quilt-2.6/arch/s390/kernel/head31.S
@@ -10,34 +10,13 @@
*
*/
-#
-# startup-code at 0x10000, running in absolute addressing mode
-# this is called either by the ipl loader or directly by PSW restart
-# or linload or SALIPL
-#
- .org 0x10000
-startup:basr %r13,0 # get base
-.LPG0: l %r13,0f-.LPG0(%r13)
- b 0(%r13)
-0: .long startup_continue
-
-#
-# params at 10400 (setup.h)
-#
- .org PARMAREA
- .long 0,0 # IPL_DEVICE
- .long 0,0 # INITRD_START
- .long 0,0 # INITRD_SIZE
-
- .org COMMAND_LINE
- .byte "root=/dev/ram0 ro"
- .byte 0
-
.org 0x11000
startup_continue:
basr %r13,0 # get base
-.LPG1: mvi __LC_AR_MODE_ID,0 # set ESA flag (mode 0)
+.LPG1:
+
+ mvi __LC_AR_MODE_ID,0 # set ESA flag (mode 0)
lctl %c0,%c15,.Lctl-.LPG1(%r13) # load control registers
l %r12,.Lparmaddr-.LPG1(%r13) # pointer to parameter area
# move IPL device to lowcore
Index: quilt-2.6/arch/s390/kernel/head64.S
===================================================================
--- quilt-2.6.orig/arch/s390/kernel/head64.S
+++ quilt-2.6/arch/s390/kernel/head64.S
@@ -10,29 +10,6 @@
*
*/
-#
-# startup-code at 0x10000, running in absolute addressing mode
-# this is called either by the ipl loader or directly by PSW restart
-# or linload or SALIPL
-#
- .org 0x10000
-startup:basr %r13,0 # get base
-.LPG0: l %r13,0f-.LPG0(%r13)
- b 0(%r13)
-0: .long startup_continue
-
-#
-# params at 10400 (setup.h)
-#
- .org PARMAREA
- .quad 0 # IPL_DEVICE
- .quad 0 # INITRD_START
- .quad 0 # INITRD_SIZE
-
- .org COMMAND_LINE
- .byte "root=/dev/ram0 ro"
- .byte 0
-
.org 0x11000
startup_continue:
Index: quilt-2.6/arch/s390/kernel/head.S
===================================================================
--- quilt-2.6.orig/arch/s390/kernel/head.S
+++ quilt-2.6/arch/s390/kernel/head.S
@@ -461,6 +461,55 @@ start:
.byte 0xf0,0xf1,0xf2,0xf3,0xf4,0xf5,0xf6,0xf7
.byte 0xf8,0xf9,0xfa,0xfb,0xfc,0xfd,0xfe,0xff
+#
+# startup-code at 0x10000, running in absolute addressing mode
+# this is called either by the ipl loader or directly by PSW restart
+# or linload or SALIPL
+#
+ .org 0x10000
+startup:basr %r13,0 # get base
+.LPG0:
+
+#ifndef CONFIG_MARCH_G5
+ # check processor version against MARCH_{G5,Z900,Z990,Z9_109,Z10}
+ stidp __LC_CPUID # store cpuid
+ lhi %r0,(3f-2f) / 2
+ la %r1,2f-.LPG0(%r13)
+0: clc __LC_CPUID+4(2),0(%r1)
+ jne 3f
+ lpsw 1f-.LPG0(13) # machine type not good enough, crash
+ .align 16
+1: .long 0x000a0000,0x00000000
+2:
+#if defined(CONFIG_MARCH_Z10)
+ .short 0x9672, 0x2064, 0x2066, 0x2084, 0x2086, 0x2094, 0x2096
+#elif defined(CONFIG_MARCH_Z9_109)
+ .short 0x9672, 0x2064, 0x2066, 0x2084, 0x2086
+#elif defined(CONFIG_MARCH_Z990)
+ .short 0x9672, 0x2064, 0x2066
+#elif defined(CONFIG_MARCH_Z900)
+ .short 0x9672
+#endif
+3: la %r1,2(%r1)
+ brct %r0,0b
+#endif
+
+ l %r13,0f-.LPG0(%r13)
+ b 0(%r13)
+0: .long startup_continue
+
+#
+# params at 10400 (setup.h)
+#
+ .org PARMAREA
+ .long 0,0 # IPL_DEVICE
+ .long 0,0 # INITRD_START
+ .long 0,0 # INITRD_SIZE
+
+ .org COMMAND_LINE
+ .byte "root=/dev/ram0 ro"
+ .byte 0
+
#ifdef CONFIG_64BIT
#include "head64.S"
#else
Index: quilt-2.6/arch/s390/Makefile
===================================================================
--- quilt-2.6.orig/arch/s390/Makefile
+++ quilt-2.6/arch/s390/Makefile
@@ -34,6 +34,7 @@ cflags-$(CONFIG_MARCH_G5) += $(call cc
cflags-$(CONFIG_MARCH_Z900) += $(call cc-option,-march=z900)
cflags-$(CONFIG_MARCH_Z990) += $(call cc-option,-march=z990)
cflags-$(CONFIG_MARCH_Z9_109) += $(call cc-option,-march=z9-109)
+cflags-$(CONFIG_MARCH_Z10) += $(call cc-option,-march=z10)
#KBUILD_IMAGE is necessary for make rpm
KBUILD_IMAGE :=arch/s390/boot/image
--
blue skies,
Martin.
"Reality continues to ruin my life." - Calvin.
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