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[S390] use facility list for cpu type safety check 

Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
This commit is contained in:
Martin Schwidefsky 2009-06-12 10:26:23 +02:00
parent ce58ae6f7f
commit 8c4caa4fbf
2 changed files with 35 additions and 15 deletions
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1
arch/s390/include/asm/lowcore.h
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@ -30,6 +30,7 @@
#define __LC_SUBCHANNEL_NR 0x00ba
#define __LC_IO_INT_PARM 0x00bc
#define __LC_IO_INT_WORD 0x00c0
#define __LC_STFL_FAC_LIST 0x00c8
#define __LC_MCCK_CODE 0x00e8
#define __LC_DUMP_REIPL 0x0e00

49
arch/s390/kernel/head.S
View File

@ -479,27 +479,46 @@ startup:basr %r13,0 # get base
mvc __LC_LAST_UPDATE_TIMER(8),6f-.LPG0(%r13)
mvc __LC_EXIT_TIMER(8),5f-.LPG0(%r13)
#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
# check capabilities against MARCH_{G5,Z900,Z990,Z9_109,Z10}
xc __LC_STFL_FAC_LIST(8),__LC_STFL_FAC_LIST
stfl __LC_STFL_FAC_LIST # store facility list
tm __LC_STFL_FAC_LIST,0x01 # stfle available ?
jz 0f
la %r0,0
.insn s,0xb2b00000,__LC_STFL_FAC_LIST # store facility list extended
0: l %r0,__LC_STFL_FAC_LIST
n %r0,2f+8-.LPG0(%r13)
cl %r0,2f+8-.LPG0(%r13)
jne 1f
l %r0,__LC_STFL_FAC_LIST+4
n %r0,2f+12-.LPG0(%r13)
cl %r0,2f+12-.LPG0(%r13)
je 3f
1: lpsw 2f-.LPG0(13) # machine type not good enough, crash
.align 16
1: .long 0x000a0000,0x00000000
2:
2: .long 0x000a0000,0x8badcccc
#if defined(CONFIG_64BIT)
#if defined(CONFIG_MARCH_Z10)
.short 0x9672, 0x2064, 0x2066, 0x2084, 0x2086, 0x2094, 0x2096
.long 0xc100efe3, 0xf0680000
#elif defined(CONFIG_MARCH_Z9_109)
.short 0x9672, 0x2064, 0x2066, 0x2084, 0x2086
.long 0xc100efc3, 0x00000000
#elif defined(CONFIG_MARCH_Z990)
.short 0x9672, 0x2064, 0x2066
.long 0xc0002000, 0x00000000
#elif defined(CONFIG_MARCH_Z900)
.short 0x9672
.long 0xc0000000, 0x00000000
#endif
3: la %r1,2(%r1)
brct %r0,0b
#else
#if defined(CONFIG_MARCH_Z10)
.long 0x8100c880, 0x00000000
#elif defined(CONFIG_MARCH_Z9_109)
.long 0x8100c880, 0x00000000
#elif defined(CONFIG_MARCH_Z990)
.long 0x80002000, 0x00000000
#elif defined(CONFIG_MARCH_Z900)
.long 0x80000000, 0x00000000
#endif
#endif
3:
#endif
l %r13,4f-.LPG0(%r13)