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s390x: enable runtime instrumentation

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Introduce run-time-instrumentation support when running under kvm for
virtio-ccw 2.7 machine and make sure older machines can not enable it.

The new ri_allowed field in the s390MachineClass serves as an indicator
whether the feature can be used by the machine and should therefore be
activated if available.

riccb_needed() is used to check whether riccb is needed or not in live
migration.

Signed-off-by: Fan Zhang <zhangfan@linux.vnet.ibm.com>
Signed-off-by: Cornelia Huck <cornelia.huck@de.ibm.com>
This commit is contained in:
Fan Zhang 2016-03-09 13:11:17 +01:00 • committed by Cornelia Huck
parent 946e55f3c7
commit 9700230b0d
5 changed files with 75 additions and 0 deletions
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4
include/hw/s390x/s390-virtio-ccw.h
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@ -35,6 +35,10 @@ typedef struct S390CcwMachineClass {
MachineClass parent_class;
/*< public >*/
bool ri_allowed;
} S390CcwMachineClass;
/* runtime-instrumentation allowed by the machine */
bool ri_allowed(void);
#endif