KVM: s390: Introduce switching code

Browse source

This patch adds code that performs transparent switch to Extended
SCA on addition of 65th VCPU in a VM. Disposal of ESCA is added too.
The entier ESCA functionality, however, is still not enabled.
The enablement will be provided in a separate patch.

This patch also uses read/write lock protection of SCA and its subfields for
possible disposal at the BSCA-to-ESCA transition. While only Basic SCA needs such
a protection (for the swap), any SCA access is now guarded.

Signed-off-by: Eugene (jno) Dvurechenski <jno@linux.vnet.ibm.com>
Signed-off-by: Christian Borntraeger <borntraeger@de.ibm.com>

...

This commit is contained in:

Eugene (jno) Dvurechenski 2015-04-22 18:08:39 +02:00 • committed by Christian Borntraeger

parent 7d43bafcff

commit 5e04431523

4 changed files with 103 additions and 9 deletions

Show all changes Ignore whitespace when comparing lines Ignore changes in amount of whitespace Ignore changes in whitespace at EOL

Download patch file Download diff file Expand all files Collapse all files

1

arch/s390/include/asm/kvm_host.h

View file

30

arch/s390/kvm/gaccess.c

View file

6

arch/s390/kvm/interrupt.c

View file

75

arch/s390/kvm/kvm-s390.c

View file