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s390/kdump: Use 64 bit mode for 0x10000 entry point 

The 0x10000 entry point can be called in z/Arch architecture and 64 bit
addressing mode. Therefore this patch removes the unnecessary 31 bit
switch code from the kdump startup function.

Signed-off-by: Michael Holzheu <holzheu@linux.vnet.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
This commit is contained in:
Michael Holzheu 2012-10-15 15:09:08 +02:00 committed by Martin Schwidefsky
parent f47586b24c
commit 9db8c050f6
1 changed files with 2 additions and 8 deletions
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10
arch/s390/kernel/head_kdump.S
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@ -85,16 +85,10 @@
.align 2
startup_kdump_relocated:
basr %r13,0
0:
mvc 0(8,%r0),.Lrestart_psw-0b(%r13) # Setup restart PSW
sam31 # Switch to 31 bit addr mode
sr %r1,%r1 # Erase register r1
sr %r2,%r2 # Erase register r2
sigp %r1,%r2,SIGP_SET_ARCHITECTURE # Switch to 31 bit arch mode
lpsw 0 # Start new kernel...
0: lpswe .Lrestart_psw-0b(%r13) # Start new kernel...
.align 8
.Lrestart_psw:
.long 0x00080000,0x80000000 + startup
.quad 0x0000000080000000,0x0000000000000000 + startup
#else
.align 2
.Lep_startup_kdump: