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Thu, 1 Jun 2023 16:45:39 +0000 (GMT) From: Pierre Morel To: linux-s390@vger.kernel.org Cc: frankja@linux.ibm.com, thuth@redhat.com, kvm@vger.kernel.org, imbrenda@linux.ibm.com, david@redhat.com, nrb@linux.ibm.com, nsg@linux.ibm.com, cohuck@redhat.com Subject: [kvm-unit-tests PATCH v5 2/2] s390x: sclp: Implement extended-length-SCCB facility Date: Thu, 1 Jun 2023 18:45:37 +0200 Message-Id: <20230601164537.31769-3-pmorel@linux.ibm.com> X-Mailer: git-send-email 2.31.1 In-Reply-To: <20230601164537.31769-1-pmorel@linux.ibm.com> References: <20230601164537.31769-1-pmorel@linux.ibm.com> MIME-Version: 1.0 X-TM-AS-GCONF: 00 X-Proofpoint-ORIG-GUID: fzYZ6cOxKisjI2sZHmMf8LS-fE37MFsB X-Proofpoint-GUID: 3GQw4X_o6FfDssN-tesFGXORccTcC29y X-Proofpoint-Virus-Version: vendor=baseguard engine=ICAP:2.0.254,Aquarius:18.0.957,Hydra:6.0.573,FMLib:17.11.176.26 definitions=2023-06-01_08,2023-05-31_03,2023-05-22_02 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 priorityscore=1501 phishscore=0 clxscore=1015 mlxlogscore=971 impostorscore=0 spamscore=0 adultscore=0 mlxscore=0 suspectscore=0 malwarescore=0 bulkscore=0 lowpriorityscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.12.0-2304280000 definitions=main-2306010144 Precedence: bulk List-ID: X-Mailing-List: kvm@vger.kernel.org When the extended-length-SCCB facility is present use a big buffer already at first try when calling sclp_read_scp_info() to avoid the SCLP_RC_INSUFFICIENT_SCCB_LENGTH error. Signed-off-by: Pierre Morel --- lib/s390x/sclp.c | 5 ++++- 1 file changed, 4 insertions(+), 1 deletion(-) diff --git a/lib/s390x/sclp.c b/lib/s390x/sclp.c index adf357b..e44d299 100644 --- a/lib/s390x/sclp.c +++ b/lib/s390x/sclp.c @@ -17,13 +17,14 @@ #include "sclp.h" #include #include +#include extern unsigned long stacktop; static uint64_t storage_increment_size; static uint64_t max_ram_size; static uint64_t ram_size; -char _read_info[PAGE_SIZE] __attribute__((__aligned__(PAGE_SIZE))); +char _read_info[2 * PAGE_SIZE] __attribute__((__aligned__(PAGE_SIZE))); static ReadInfo *read_info; struct sclp_facilities sclp_facilities; @@ -114,6 +115,8 @@ static void sclp_read_scp_info(ReadInfo *ri, int length) void sclp_read_info(void) { sclp_read_scp_info((void *)_read_info, SCCB_SIZE); + sclp_read_scp_info((void *)_read_info, + test_facility(140) ? sizeof(_read_info) : SCCB_SIZE); read_info = (ReadInfo *)_read_info; }