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authorCornelia Huck <cornelia.huck@de.ibm.com>2012-12-20 15:32:12 +0100
committerMarcelo Tosatti <mtosatti@redhat.com>2013-01-07 19:53:43 -0200
commitfa6b7fe9928d50444c29b29c8563746c6b0c6299 (patch)
tree0be284cf322eb82eefdb3df2743740e5578ba5c4 /arch/s390/kvm/intercept.c
parentd6712df95bcfea597fc3ea2405ec13e8b69a7b8c (diff)
downloadop-kernel-dev-fa6b7fe9928d50444c29b29c8563746c6b0c6299.zip
op-kernel-dev-fa6b7fe9928d50444c29b29c8563746c6b0c6299.tar.gz
KVM: s390: Add support for channel I/O instructions.
Add a new capability, KVM_CAP_S390_CSS_SUPPORT, which will pass intercepts for channel I/O instructions to userspace. Only I/O instructions interacting with I/O interrupts need to be handled in-kernel: - TEST PENDING INTERRUPTION (tpi) dequeues and stores pending interrupts entirely in-kernel. - TEST SUBCHANNEL (tsch) dequeues pending interrupts in-kernel and exits via KVM_EXIT_S390_TSCH to userspace for subchannel- related processing. Reviewed-by: Marcelo Tosatti <mtosatti@redhat.com> Reviewed-by: Alexander Graf <agraf@suse.de> Signed-off-by: Cornelia Huck <cornelia.huck@de.ibm.com> Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>
Diffstat (limited to 'arch/s390/kvm/intercept.c')
-rw-r--r--arch/s390/kvm/intercept.c1
1 files changed, 1 insertions, 0 deletions
diff --git a/arch/s390/kvm/intercept.c b/arch/s390/kvm/intercept.c
index 71af87d..f26ff1e 100644
--- a/arch/s390/kvm/intercept.c
+++ b/arch/s390/kvm/intercept.c
@@ -264,6 +264,7 @@ static const intercept_handler_t intercept_funcs[] = {
[0x0C >> 2] = handle_instruction_and_prog,
[0x10 >> 2] = handle_noop,
[0x14 >> 2] = handle_noop,
+ [0x18 >> 2] = handle_noop,
[0x1C >> 2] = kvm_s390_handle_wait,
[0x20 >> 2] = handle_validity,
[0x28 >> 2] = handle_stop,
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