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This patch introduces tracepoint definitions and tracepoint event invocations for the s390 zcrypt device. Currently there are just two tracepoint events defined. An s390_zcrypt_req request event occurs as soon as the request is recognized by the zcrypt ioctl function. This event may act as some kind of request-processing-starts-now indication. As late as possible within the zcrypt ioctl function there occurs the s390_zcrypt_rep event which may act as the point in time where the request has been processed by the kernel and the result is about to be transferred back to userspace. The glue which binds together request and reply event is the ptr parameter, which is the local buffer address where the request from userspace has been stored by the ioctl function. The main purpose of this zcrypt tracepoint patch is to get some data for performance measurements together with information about the kind of request and on which card and queue the request has been processed. It is not an ffdc interface as there is already code in the zcrypt device driver to serve the s390 debug feature interface. Signed-off-by: Harald Freudenberger <freude@linux.vnet.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com> |
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| diag.h | ||
| zcrypt.h | ||