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Thu, 15 May 2025 13:07:23 +0000 (GMT) Precedence: bulk X-Mailing-List: linux-s390@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: Mime-Version: 1.0 Content-Transfer-Encoding: quoted-printable Content-Type: text/plain; charset=UTF-8 Date: Thu, 15 May 2025 15:07:18 +0200 Message-Id: From: "Christoph Schlameuss" Cc: , "Christian Borntraeger" , "Janosch Frank" , "David Hildenbrand" , "Heiko Carstens" , "Vasily Gorbik" , "Alexander Gordeev" , "Sven Schnelle" , To: "Claudio Imbrenda" Subject: Re: [PATCH 2/3] KVM: s390: Always allocate esca_block X-Mailer: aerc 0.20.1 References: <20250514-rm-bsca-v1-0-6c2b065a8680@linux.ibm.com> <20250514-rm-bsca-v1-2-6c2b065a8680@linux.ibm.com> <20250515132448.5c03956d@p-imbrenda> In-Reply-To: <20250515132448.5c03956d@p-imbrenda> X-TM-AS-GCONF: 00 X-Proofpoint-GUID: 40r_P_Wx79Jxtm5oxdv0qAkIpjbwYgYp X-Proofpoint-Spam-Details-Enc: AW1haW4tMjUwNTE1MDEyOSBTYWx0ZWRfXxE+sxI+d8gGx p4vpEKejSkQJGkwdJb4xuSNZutsaGQxVu8SGNLLtV2xATVWloJmqiJgaMOCFw2nckh+xQ2SpT9c 3YoSSVLzS3Jr+7r0yC04BsuCi2LrgDtOSEo0MgptwzSbesXWzxnWqFRiFvlYvVgzvBXLfmAmVNu XSTgqKkuDe2LrQWgN/C88qUFVUe+LdeU1S/W+AU7zUvjciqPDekXJZyDe9gch9RmvfB/T8PG/1Q 9VlWHQbyE549T/kPwR/5QDtS8cogGvy7CDhSOdDEj864pd3mnXZ9FNZooK2bqVKTpGyFvPK6ANv cgYhm/hQ3+fyYrme1YLV0fsvluNKxdw7S72GdATa1uGxgNN0tRVozx1l+5u5MZdcPj5UY2FGAHx 10X9TXfjIA57PmOeRGAk/LpQ5jVwO7TVaJ4G9atS7a4U+SmwP+CCw6wUIjCgMlV/Xwo+hg2c X-Proofpoint-ORIG-GUID: 40r_P_Wx79Jxtm5oxdv0qAkIpjbwYgYp X-Authority-Analysis: v=2.4 cv=GbEXnRXL c=1 sm=1 tr=0 ts=6825e710 cx=c_pps a=3Bg1Hr4SwmMryq2xdFQyZA==:117 a=3Bg1Hr4SwmMryq2xdFQyZA==:17 a=IkcTkHD0fZMA:10 a=dt9VzEwgFbYA:10 a=VnNF1IyMAAAA:8 a=dQrG6oB7o3M4uFuVAdwA:9 a=QEXdDO2ut3YA:10 X-Proofpoint-Virus-Version: vendor=baseguard engine=ICAP:2.0.293,Aquarius:18.0.1099,Hydra:6.0.736,FMLib:17.12.80.40 definitions=2025-05-15_05,2025-05-14_03,2025-03-28_01 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 adultscore=0 impostorscore=0 clxscore=1015 priorityscore=1501 lowpriorityscore=0 suspectscore=0 mlxlogscore=697 phishscore=0 bulkscore=0 malwarescore=0 mlxscore=0 spamscore=0 classifier=spam authscore=0 authtc=n/a authcc= route=outbound adjust=0 reason=mlx scancount=1 engine=8.19.0-2505070000 definitions=main-2505150129 On Thu May 15, 2025 at 1:24 PM CEST, Claudio Imbrenda wrote: > On Wed, 14 May 2025 18:34:50 +0200 > Christoph Schlameuss wrote: > >> Instead of allocating a BSCA and upgrading it for PV or when adding the >> 65th cpu we can always use the ESCA. >>=20 >> The only downside of the change is that we will always allocate 4 pages >> for a 248 cpu ESCA instead of a single page for the BSCA per VM. >> In return we can delete a bunch of checks and special handling depending >> on the SCA type as well as the whole BSCA to ESCA conversion. >>=20 >> As a fallback we can still run without SCA entries when the SIGP >> interpretation facility is not available. > > s/is/or BSCA are/ > With this merged we do no longer care for the BSCA. So I will change this t= o s/is/or ESCA are/ I will also apply the other changes for the next version. But I will wait f= or more feedback before sending that. And I will run checkpatch with the stric= t option, which I clearly did not do. [...]