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Commit 8c4caa4f authored by Martin Schwidefsky's avatar Martin Schwidefsky
Browse files

[S390] use facility list for cpu type safety check 



Signed-off-by: default avatarMartin Schwidefsky <schwidefsky@de.ibm.com>
parent ce58ae6f

arch/s390/include/asm/lowcore.h

+1 −0
Original line number Diff line number Diff line
@@ -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

arch/s390/kernel/head.S

+34 −15
Original line number Diff line number Diff line
@@ -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)

	.long 0xc100efe3, 0xf0680000

#elif defined(CONFIG_MARCH_Z9_109)

	.long 0xc100efc3, 0x00000000

#elif defined(CONFIG_MARCH_Z990)

	.long 0xc0002000, 0x00000000

#elif defined(CONFIG_MARCH_Z900)

	.long 0xc0000000, 0x00000000

#endif

#else

#if defined(CONFIG_MARCH_Z10)

	.short 0x9672, 0x2064, 0x2066, 0x2084, 0x2086, 0x2094, 0x2096

	.long 0x8100c880, 0x00000000

#elif defined(CONFIG_MARCH_Z9_109)

	.short 0x9672, 0x2064, 0x2066, 0x2084, 0x2086

	.long 0x8100c880, 0x00000000

#elif defined(CONFIG_MARCH_Z990)

	.short 0x9672, 0x2064, 0x2066

	.long 0x80002000, 0x00000000

#elif defined(CONFIG_MARCH_Z900)

	.short 0x9672

	.long 0x80000000, 0x00000000

#endif

#endif

3:	la	%r1,2(%r1)

	brct	%r0,0b

3:

#endif



	l	%r13,4f-.LPG0(%r13)