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s390/zcrypt: support special flagged EP11 cprbs

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Within an EP11 cprb there exists a byte field flags. Bit 0x20
of this field indicates a special cprb. A special cprb triggers
special handling in the firmware below the OS layer.

However, a special cprb also needs to have the S bit in GPR0
set when NQAP is called. This was not the case for EP11 cprbs
and this patch now introduces the code to support this.

Signed-off-by: Harald Freudenberger <freude@linux.ibm.com>
Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com>
This commit is contained in:
Harald Freudenberger 2019-06-05 07:19:54 +02:00 committed by Heiko Carstens
parent bae0aae2f8
commit e1ab11012e
1 changed files with 4 additions and 0 deletions
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4
drivers/s390/crypto/zcrypt_msgtype6.c
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@ -567,6 +567,10 @@ static int xcrb_msg_to_type6_ep11cprb_msgx(struct ap_message *ap_msg,
payload_hdr = (struct pld_hdr *)((&(msg->pld_lenfmt))+lfmt);
*fcode = payload_hdr->func_val & 0xFFFF;
/* enable special processing based on the cprbs flags special bit */
if (msg->cprbx.flags & 0x20)
ap_msg->special = 1;
return 0;
}