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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: <1534196899-16987-1-git-send-email-akrowiak@linux.vnet.ibm.com> <1534196899-16987-5-git-send-email-akrowiak@linux.vnet.ibm.com> <20180814104335.4bc3630a.cohuck@redhat.com> From: Tony Krowiak Date: Fri, 17 Aug 2018 09:18:51 -0400 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:52.0) Gecko/20100101 Thunderbird/52.2.0 MIME-Version: 1.0 In-Reply-To: <20180814104335.4bc3630a.cohuck@redhat.com> Content-Type: text/plain; charset=utf-8; format=flowed Content-Transfer-Encoding: 7bit Content-Language: en-US X-TM-AS-GCONF: 00 x-cbid: 18081713-0012-0000-0000-000016A03039 X-IBM-SpamModules-Scores: X-IBM-SpamModules-Versions: BY=3.00009561; HX=3.00000242; KW=3.00000007; PH=3.00000004; SC=3.00000266; SDB=6.01074831; UDB=6.00553931; IPR=6.00854789; MB=3.00022773; MTD=3.00000008; XFM=3.00000015; UTC=2018-08-17 13:19:01 X-IBM-AV-DETECTION: SAVI=unused REMOTE=unused XFE=unused x-cbparentid: 18081713-0013-0000-0000-00005412D011 Message-Id: <49e99e8a-7de8-abde-6775-af11680db13d@linux.ibm.com> X-Proofpoint-Virus-Version: vendor=fsecure engine=2.50.10434:,, definitions=2018-08-17_03:,, signatures=0 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 priorityscore=1501 malwarescore=0 suspectscore=0 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-1808170146 Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On 08/14/2018 04:43 AM, Cornelia Huck wrote: > On Mon, 13 Aug 2018 17:48:01 -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 >> Signed-off-by: Tony Krowiak >> --- >> arch/s390/include/asm/ap.h | 284 ++++++++++++++++++++++++++++++++++++---- >> drivers/s390/crypto/ap_bus.c | 23 +--- >> drivers/s390/crypto/ap_bus.h | 1 + >> drivers/s390/crypto/ap_card.c | 1 - >> drivers/s390/crypto/ap_queue.c | 1 - >> 5 files changed, 260 insertions(+), 50 deletions(-) >> >> diff --git a/arch/s390/include/asm/ap.h b/arch/s390/include/asm/ap.h >> index c1bedb4..887494a 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 1 if the AP instructions are installed, otherwise 0. >> + */ >> +static inline int ap_instructions_available(void) >> +{ >> + register unsigned long reg0 asm ("0") = AP_MKQID(0, 0); >> + register unsigned long reg1 asm ("1") = 0; >> + register unsigned long reg2 asm ("2") = 0; >> + >> + asm volatile( >> + " .long 0xb2af0000\n" /* PQAP(TAPQ) */ >> + "0: la %0,1\n" >> + "1:\n" >> + EX_TABLE(0b, 1b) >> + : "+d" (reg1), "+d" (reg2) >> + : "d" (reg0) >> + : "cc"); >> + return reg1; >> +} > I think upstream this change (have this function return !0 when the > instructions are installed) will be an addon patch to the one which has > already made its way into master. Not really relevant for the remainder > of this patch series, though. I noticed that Harald's patches showed up in our master branch yesterday without this change. >