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Mon, 20 Apr 2026 08:49:41 +0000 (GMT) Received: from b46lp25.lnxne.boe (unknown [9.87.84.240]) by smtpav01.fra02v.mail.ibm.com (Postfix) with ESMTP; Mon, 20 Apr 2026 08:49:41 +0000 (GMT) From: Janosch Frank To: kvm@vger.kernel.org Cc: linux-s390@vger.kernel.org, imbrenda@linux.ibm.com, borntraeger@linux.ibm.com, nrb@linux.ibm.com Subject: [kvm-unit-tests PATCH v2 4/4] lib: s390x: snippet: Add function to create a guest of specific length Date: Mon, 20 Apr 2026 08:44:25 +0000 Message-ID: <20260420084933.251244-5-frankja@linux.ibm.com> X-Mailer: git-send-email 2.51.0 In-Reply-To: <20260420084933.251244-1-frankja@linux.ibm.com> References: <20260420084933.251244-1-frankja@linux.ibm.com> Precedence: bulk X-Mailing-List: linux-s390@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-TM-AS-GCONF: 00 X-Proofpoint-ORIG-GUID: MVtza7tYBRyDmk9w1MUenwBzDVPkCPJH X-Proofpoint-Spam-Details-Enc: AW1haW4tMjYwNDIwMDA4NCBTYWx0ZWRfX4rh9aNqWwpeX XTQuKZ/vY6ky+Sm0CAU0nMROQIOheKhke38lR+5tC/Vs94D7tNEKxKEuCbTqnkq5zwqZxC5HkDb a9v0kLBqx/XvxDn2+IABhROsMygj0YWkg2pz1OAXYAjrzZlbCv/7mZhCPa1Mf9yj69DsAWRV73x kY+X2OHHLonwOtBF70nim8w+Q/nGd4Nlex3XWh1rc/J+HazD0YYjOHjB2PPiHdgtiGGU8LQ3Jug OFmcyjLItDGI36PFGpkkB/30ttiFYV+VKgsg0FOm7BGexSg4kmJaGQguW9U65ba0qP/CWpjOlHZ sfHyIAtqzY8VbB/AioM1hZybNjk9B41fjaRZvfz7suiloKyI57qBKVIG7sxZT2qtooN2sEyXK5v s3dUNHS9/6NDPtWEWfzM18FAZKXX+PRZ1GYOiiWx8iSOLp0rHUZHw4hvvuSgCabjTaQulnVF0qj yDDu1KrdrP9sNpnzrqA== X-Authority-Analysis: v=2.4 cv=XLYAjwhE c=1 sm=1 tr=0 ts=69e5e8a9 cx=c_pps a=3Bg1Hr4SwmMryq2xdFQyZA==:117 a=3Bg1Hr4SwmMryq2xdFQyZA==:17 a=A5OVakUREuEA:10 a=VkNPw1HP01LnGYTKEx00:22 a=RnoormkPH1_aCDwRdu11:22 a=Y2IxJ9c9Rs8Kov3niI8_:22 a=VnNF1IyMAAAA:8 a=6ZxjpF0HYxlCLNsfbHYA:9 X-Proofpoint-GUID: MVtza7tYBRyDmk9w1MUenwBzDVPkCPJH X-Proofpoint-Virus-Version: vendor=baseguard engine=ICAP:2.0.293,Aquarius:18.0.1143,Hydra:6.1.51,FMLib:17.12.100.49 definitions=2026-04-20_01,2026-04-17_04,2025-10-01_01 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 clxscore=1015 bulkscore=0 impostorscore=0 spamscore=0 adultscore=0 priorityscore=1501 phishscore=0 lowpriorityscore=0 malwarescore=0 suspectscore=0 classifier=typeunknown authscore=0 authtc= authcc= route=outbound adjust=0 reason=mlx scancount=1 engine=8.22.0-2604070000 definitions=main-2604200084 While 1MB is certainly enough to store the guest code, it's often not enough for memory tests. Let's add a separate function to allow arbitrary guest sizes. Signed-off-by: Janosch Frank Reviewed-by: Nico Boehr --- lib/s390x/snippet.h | 14 ++++++++++++-- 1 file changed, 12 insertions(+), 2 deletions(-) diff --git a/lib/s390x/snippet.h b/lib/s390x/snippet.h index 94688f49..05c9a2d4 100644 --- a/lib/s390x/snippet.h +++ b/lib/s390x/snippet.h @@ -123,10 +123,14 @@ static inline void snippet_pv_init(struct vm *vm, const char *gbin, } /* Allocates and sets up a snippet based guest */ -static inline void snippet_setup_guest(struct vm *vm, bool is_pv) +static inline void snippet_setup_guest_len(struct vm *vm, bool is_pv, + unsigned long len) { + /* Guest sizes are specified in megabyte chunks */ + assert(!(len & ~HPAGE_MASK)); + /* Initialize the vm struct and allocate control blocks */ - sie_guest_create(vm, SZ_1M); + sie_guest_create(vm, len); if (is_pv) { /* FMT4 needs a ESCA */ @@ -141,6 +145,12 @@ static inline void snippet_setup_guest(struct vm *vm, bool is_pv) } } +/* Allocates and sets up a snippet based guest */ +static inline void snippet_setup_guest(struct vm *vm, bool is_pv) +{ + snippet_setup_guest_len(vm, is_pv, SZ_1M); +} + static inline void snippet_destroy_guest(struct vm *vm) { sie_guest_destroy(vm); -- 2.51.0