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Violators will be prosecuted; (version=TLSv1/SSLv3 cipher=AES256-GCM-SHA384 bits=256/256) Thu, 9 Aug 2018 10:17:29 +0100 Received: from d06av24.portsmouth.uk.ibm.com (d06av24.portsmouth.uk.ibm.com [9.149.105.60]) by b06cxnps4074.portsmouth.uk.ibm.com (8.14.9/8.14.9/NCO v10.0) with ESMTP id w799HRi634996256 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-GCM-SHA384 bits=256 verify=FAIL); Thu, 9 Aug 2018 09:17:28 GMT Received: from d06av24.portsmouth.uk.ibm.com (unknown [127.0.0.1]) by IMSVA (Postfix) with ESMTP id CB4D842045; Thu, 9 Aug 2018 12:17:35 +0100 (BST) Received: from d06av24.portsmouth.uk.ibm.com (unknown [127.0.0.1]) by IMSVA (Postfix) with ESMTP id 520134204D; Thu, 9 Aug 2018 12:17:33 +0100 (BST) Received: from [10.0.2.15] (unknown [9.152.224.40]) by d06av24.portsmouth.uk.ibm.com (Postfix) with ESMTP; Thu, 9 Aug 2018 12:17:33 +0100 (BST) Subject: Re: [PATCH v8 04/22] s390/zcrypt: Integrate ap_asm.h into include/asm/ap.h. To: Cornelia Huck , Tony Krowiak Cc: linux-s390@vger.kernel.org, linux-kernel@vger.kernel.org, kvm@vger.kernel.org, freude@de.ibm.com, schwidefsky@de.ibm.com, heiko.carstens@de.ibm.com, borntraeger@de.ibm.com, kwankhede@nvidia.com, bjsdjshi@linux.vnet.ibm.com, pbonzini@redhat.com, alex.williamson@redhat.com, pmorel@linux.vnet.ibm.com, alifm@linux.vnet.ibm.com, mjrosato@linux.vnet.ibm.com, jjherne@linux.vnet.ibm.com, thuth@redhat.com, pasic@linux.vnet.ibm.com, berrange@redhat.com, fiuczy@linux.vnet.ibm.com, buendgen@de.ibm.com, frankja@linux.ibm.com References: <1533739472-7172-1-git-send-email-akrowiak@linux.vnet.ibm.com> <1533739472-7172-5-git-send-email-akrowiak@linux.vnet.ibm.com> <20180809110645.33b20c1f.cohuck@redhat.com> From: Harald Freudenberger Date: Thu, 9 Aug 2018 11:17:26 +0200 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:52.0) Gecko/20100101 Thunderbird/52.9.1 MIME-Version: 1.0 In-Reply-To: <20180809110645.33b20c1f.cohuck@redhat.com> Content-Type: text/plain; charset=utf-8 Content-Transfer-Encoding: 7bit Content-Language: en-US X-TM-AS-GCONF: 00 x-cbid: 18080909-0016-0000-0000-000001F44D64 X-IBM-AV-DETECTION: SAVI=unused REMOTE=unused XFE=unused x-cbparentid: 18080909-0017-0000-0000-0000324A5FF0 Message-Id: X-Proofpoint-Virus-Version: vendor=fsecure engine=2.50.10434:,, definitions=2018-08-09_03:,, signatures=0 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 priorityscore=1501 malwarescore=0 suspectscore=2 phishscore=0 bulkscore=0 spamscore=0 clxscore=1015 lowpriorityscore=0 mlxscore=0 impostorscore=0 mlxlogscore=999 adultscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.0.1-1807170000 definitions=main-1808090096 Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On 09.08.2018 11:06, Cornelia Huck wrote: > On Wed, 8 Aug 2018 10:44:14 -0400 > Tony Krowiak wrote: > >> From: Harald Freudenberger >> >> Move all the inline functions from the ap bus header >> file ap_asm.h into the in-kernel api header file >> arch/s390/include/asm/ap.h so that KVM can make use >> of all the low level AP functions. >> >> Signed-off-by: Harald Freudenberger >> Signed-off-by: Christian Borntraeger > You should add your own s-o-b if you are sending on patches written by > others (even if it does not matter in the end, when they are merged > through a different path anyway.) > >> --- >> arch/s390/include/asm/ap.h | 284 ++++++++++++++++++++++++++++++++++++---- >> drivers/s390/crypto/ap_asm.h | 261 ------------------------------------ >> drivers/s390/crypto/ap_bus.c | 21 +--- >> drivers/s390/crypto/ap_bus.h | 1 + >> drivers/s390/crypto/ap_card.c | 1 - >> drivers/s390/crypto/ap_queue.c | 1 - >> 6 files changed, 259 insertions(+), 310 deletions(-) >> delete mode 100644 drivers/s390/crypto/ap_asm.h >> >> diff --git a/arch/s390/include/asm/ap.h b/arch/s390/include/asm/ap.h >> index c1bedb4..046e044 100644 >> --- a/arch/s390/include/asm/ap.h >> +++ b/arch/s390/include/asm/ap.h >> @@ -47,6 +47,50 @@ struct ap_queue_status { >> }; >> >> /** >> + * ap_intructions_available() - Test if AP instructions are available. >> + * >> + * Returns 0 if the AP instructions are installed. > Stumbled over this when I was looking at the usage in patch 7: if I see > a function called '_available' return 0, I'd assume that whatever the > function tests for is *not* available. > > Rather call this function ap_instructions_check_availability() (and > keep the return code convention), or switch this to return 0 if not > available and !0 if available? Good catch, Cony you are right. I'll fix this to return 1 if AP instructions are available and 0 if not. However, this patch will come via Martin's pipe to the Linus Torwald kernel sources. > >> + */ >> +static inline int ap_instructions_available(void) >> +{ >> + register unsigned long reg0 asm ("0") = AP_MKQID(0, 0); >> + register unsigned long reg1 asm ("1") = -ENODEV; >> + register unsigned long reg2 asm ("2"); >> + >> + asm volatile( >> + " .long 0xb2af0000\n" /* PQAP(TAPQ) */ >> + "0: la %0,0\n" >> + "1:\n" >> + EX_TABLE(0b, 1b) >> + : "+d" (reg1), "=d" (reg2) >> + : "d" (reg0) >> + : "cc"); >> + return reg1; >> +} > -- > To unsubscribe from this list: send the line "unsubscribe linux-s390" in > the body of a message to majordomo@vger.kernel.org > More majordomo info at http://vger.kernel.org/majordomo-info.html >