KVM: s390: synchronize more registers with kvm_run

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In order to reduce the number of syscalls when dropping to user space, this
patch enables the synchronization of the following "registers" with kvm_run:
- ARCH0: CPU timer, clock comparator, TOD programmable register,
         guest breaking-event register, program parameter
- PFAULT: pfault parameters (token, select, compare)

The registers are grouped to reduce the overhead when syncing.

As this grows the number of sync registers quite a bit, let's move the code
synchronizing registers with kvm_run from kvm_arch_vcpu_ioctl_run() into
separate helper routines.

Signed-off-by: David Hildenbrand <dahi@linux.vnet.ibm.com>
Reviewed-by: Cornelia Huck <cornelia.huck@de.ibm.com>
Reviewed-by: Christian Borntraeger <borntraeger@de.ibm.com>
Signed-off-by: Christian Borntraeger <borntraeger@de.ibm.com>

...

This commit is contained in:

David Hildenbrand 2014-07-17 10:47:43 +02:00 • committed by Christian Borntraeger

parent c3950b66b9

commit b028ee3edd

2 changed files with 56 additions and 14 deletions

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10

arch/s390/include/uapi/asm/kvm.h

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60

arch/s390/kvm/kvm-s390.c

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