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Wed, 11 Aug 2021 14:59:54 +0000 (GMT) Received: from d06av22.portsmouth.uk.ibm.com (unknown [127.0.0.1]) by IMSVA (Postfix) with ESMTP id AB50A4C04E; Wed, 11 Aug 2021 14:59:53 +0000 (GMT) Received: from linux.fritz.box (unknown [9.145.12.48]) by d06av22.portsmouth.uk.ibm.com (Postfix) with ESMTP; Wed, 11 Aug 2021 14:59:53 +0000 (GMT) To: Pierre Morel , linux-s390@vger.kernel.org Cc: thuth@redhat.com, kvm@vger.kernel.org, cohuck@redhat.com, imbrenda@linux.ibm.com, david@redhat.com References: <1628612544-25130-1-git-send-email-pmorel@linux.ibm.com> <1628612544-25130-2-git-send-email-pmorel@linux.ibm.com> From: Janosch Frank Subject: Re: [kvm-unit-tests PATCH v2 1/4] s390x: lib: Add SCLP toplogy nested level Message-ID: <313172a3-6074-1bc5-f0fc-c48394b6f9bc@linux.ibm.com> Date: Wed, 11 Aug 2021 16:59:53 +0200 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:78.0) Gecko/20100101 Thunderbird/78.11.0 MIME-Version: 1.0 In-Reply-To: <1628612544-25130-2-git-send-email-pmorel@linux.ibm.com> Content-Type: text/plain; charset=utf-8 Content-Language: en-US Content-Transfer-Encoding: 8bit X-TM-AS-GCONF: 00 X-Proofpoint-ORIG-GUID: Xr6zgdKaLklStkW-8TvmCsyCvLO2mM6h X-Proofpoint-GUID: xKorwRU70yCkYlEXL0SiIfuPh1Oos_qC X-Proofpoint-Virus-Version: vendor=fsecure engine=2.50.10434:6.0.391,18.0.790 definitions=2021-08-11_05:2021-08-11,2021-08-11 signatures=0 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 adultscore=0 mlxlogscore=999 mlxscore=0 malwarescore=0 priorityscore=1501 lowpriorityscore=0 spamscore=0 suspectscore=0 clxscore=1015 bulkscore=0 impostorscore=0 phishscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.12.0-2107140000 definitions=main-2108110098 Precedence: bulk List-ID: X-Mailing-List: linux-s390@vger.kernel.org On 8/10/21 6:22 PM, Pierre Morel wrote: > The maximum CPU Topology nested level is available with the SCLP > READ_INFO command inside the byte at offset 15 of the ReadInfo > structure. > > Let's return this information to check the number of topology nested > information available with the STSI 15.1.x instruction. > > Signed-off-by: Pierre Morel > Reviewed-by: Claudio Imbrenda Reviewed-by: Janosch Frank > --- > lib/s390x/sclp.c | 6 ++++++ > lib/s390x/sclp.h | 4 +++- > 2 files changed, 9 insertions(+), 1 deletion(-) > > diff --git a/lib/s390x/sclp.c b/lib/s390x/sclp.c > index 9502d161..ee379ddf 100644 > --- a/lib/s390x/sclp.c > +++ b/lib/s390x/sclp.c > @@ -123,6 +123,12 @@ int sclp_get_cpu_num(void) > return read_info->entries_cpu; > } > > +int sclp_get_stsi_parm(void) > +{ > + assert(read_info); > + return read_info->stsi_parm; > +} > + > CPUEntry *sclp_get_cpu_entries(void) > { > assert(read_info); > diff --git a/lib/s390x/sclp.h b/lib/s390x/sclp.h > index 28e526e2..1a365958 100644 > --- a/lib/s390x/sclp.h > +++ b/lib/s390x/sclp.h > @@ -146,7 +146,8 @@ typedef struct ReadInfo { > SCCBHeader h; > uint16_t rnmax; > uint8_t rnsize; > - uint8_t _reserved1[16 - 11]; /* 11-15 */ > + uint8_t _reserved1[15 - 11]; /* 11-14 */ > + uint8_t stsi_parm; > uint16_t entries_cpu; /* 16-17 */ > uint16_t offset_cpu; /* 18-19 */ > uint8_t _reserved2[24 - 20]; /* 20-23 */ > @@ -322,6 +323,7 @@ void sclp_console_setup(void); > void sclp_print(const char *str); > void sclp_read_info(void); > int sclp_get_cpu_num(void); > +int sclp_get_stsi_parm(void); > CPUEntry *sclp_get_cpu_entries(void); > void sclp_facilities_setup(void); > int sclp_service_call(unsigned int command, void *sccb); >