s390/zcrypt: Introduce QACT support for AP bus devices.

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This patch introduces a new ap_qact() function which
exploits the PQAP(QACT) subfunction. QACT is a new
interface to Query the Ap Compatilibity Type based
on a given AP qid, type, mode and version.

Based on this new function the AP bus scan code is
slightly reworked to use this new interface for
querying the compatible type for each new AP queue
device detected. So new and unknown devices can
get automatically mapped to a compatible type and
handled without the need for toleration patches
for every new hardware.

The currently highest known hardware is CEX6S.
With this patch a possible successor can get
queried for a combatible type known by the device
driver without the need for an toleration patch.

Signed-off-by: Harald Freudenberger <freude@linux.vnet.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>

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This commit is contained in:

Harald Freudenberger 2017-10-16 12:28:35 +02:00 • committed by Martin Schwidefsky

parent 0acb1665aa

commit 9a5641080b

5 changed files with 116 additions and 15 deletions

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43

drivers/s390/crypto/ap_asm.h

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74

drivers/s390/crypto/ap_bus.c

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4

drivers/s390/crypto/ap_bus.h

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9

drivers/s390/crypto/ap_card.c

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1

drivers/s390/crypto/ap_queue.c

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