[POWERPC] Avoid hypervisor statistics calculation in real mode

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kexec invokes plpar_hcall hypervisor call in real mode.  plpar_hcall
refers to per cpu variables for accounting hypervisor statistics.
These variables may not be in the RMO region, so accesses to them
in real mode may result in a data storage exception.

This fixes this problem by using a new plpar_hcall_raw function which
does not update the hypervisor call statistics.  Thanks to Anton for
suggesting this idea.

Signed-off-by: Mohan Kumar M <mohan@in.ibm.com>
Signed-off-by: Paul Mackerras <paulus@samba.org>

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Mohan Kumar M 2007-03-21 11:21:32 +05:30 • committed by Paul Mackerras

parent f144e7c727

commit b4aea36b79

4 changed files with 65 additions and 1 deletions

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34

arch/powerpc/platforms/pseries/hvCall.S

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2

arch/powerpc/platforms/pseries/lpar.c

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16

arch/powerpc/platforms/pseries/plpar_wrappers.h

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