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Mon, 22 Dec 2025 16:50:37 +0000 (GMT) From: Claudio Imbrenda To: kvm@vger.kernel.org Cc: linux-kernel@vger.kernel.org, linux-s390@vger.kernel.org, borntraeger@de.ibm.com, frankja@linux.ibm.com, nsg@linux.ibm.com, nrb@linux.ibm.com, seiden@linux.ibm.com, gra@linux.ibm.com, schlameuss@linux.ibm.com, hca@linux.ibm.com, svens@linux.ibm.com, agordeev@linux.ibm.com, gor@linux.ibm.com, david@redhat.com, gerald.schaefer@linux.ibm.com Subject: [PATCH v6 03/28] s390: Make UV folio operations work on whole folio Date: Mon, 22 Dec 2025 17:50:08 +0100 Message-ID: <20251222165033.162329-4-imbrenda@linux.ibm.com> X-Mailer: git-send-email 2.52.0 In-Reply-To: <20251222165033.162329-1-imbrenda@linux.ibm.com> References: <20251222165033.162329-1-imbrenda@linux.ibm.com> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable X-TM-AS-GCONF: 00 X-Authority-Analysis: v=2.4 cv=bulBxUai c=1 sm=1 tr=0 ts=694976e3 cx=c_pps a=bLidbwmWQ0KltjZqbj+ezA==:117 a=bLidbwmWQ0KltjZqbj+ezA==:17 a=wP3pNCr1ah4A:10 a=VkNPw1HP01LnGYTKEx00:22 a=VnNF1IyMAAAA:8 a=56eYp6RrapUnXBmR778A:9 X-Proofpoint-ORIG-GUID: RBr-c5kDQXEgry7RpIWLrnHlUz4Ilnp_ X-Proofpoint-Spam-Details-Enc: AW1haW4tMjUxMjIyMDE1NCBTYWx0ZWRfX5oeKI2N1W7mp pDp6tkvPAtMT31gKnvkBTqcaZpD0rIO6Oh/blDNlIN72INPOVr+XREvA6qpicvFkVAcozpNnA0a J7D3BZ/S8PzYkxVX3ws1RNRpu4pY1qRsT5OiiEjTgDVlDSWQfw3sKupIl1V/ETEMSdDhOjRwfHW jr1L/15lld6N3rqlUjXng68puL3P6I+I2pU5cZ3HCcpJD3bOtZJoSzjF4SiAzquxM2y+0uyru2d KP3Th8VOyntES4n6NMXw/3DsxYhRBMGCq4hKyllzqP5hisvCLGy6jNQJi0rphlkZ9hgD1TFY04u jJUmAlKveUbUnEAwStYyDcUj44XYGWNGIUtcOzE3N7JtdUsfYynFeeoClsHX7QA68wbgpPx63pH ALCURtZCoslfQSQ58ttak+OqHP4vDrtSp/R8GkyYRIlQaN6UEBbkk3L6Y5VfviC8DF9MzdraXli ku0tCAzmeY9WgV9T3RA== X-Proofpoint-GUID: RBr-c5kDQXEgry7RpIWLrnHlUz4Ilnp_ X-Proofpoint-Virus-Version: vendor=baseguard engine=ICAP:2.0.293,Aquarius:18.0.1121,Hydra:6.1.9,FMLib:17.12.100.49 definitions=2025-12-22_02,2025-12-22_01,2025-10-01_01 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 adultscore=0 suspectscore=0 clxscore=1015 lowpriorityscore=0 priorityscore=1501 spamscore=0 malwarescore=0 bulkscore=0 phishscore=0 impostorscore=0 classifier=typeunknown authscore=0 authtc= authcc= route=outbound adjust=0 reason=mlx scancount=1 engine=8.19.0-2512120000 definitions=main-2512220154 Content-Type: text/plain; charset="utf-8" uv_destroy_folio() and uv_convert_from_secure_folio() should work on all pages in the folio, not just the first one. This was fine until now, but it will become a problem with upcoming patches. Signed-off-by: Claudio Imbrenda --- arch/s390/kernel/uv.c | 22 ++++++++++++---------- 1 file changed, 12 insertions(+), 10 deletions(-) diff --git a/arch/s390/kernel/uv.c b/arch/s390/kernel/uv.c index ed46950be86f..ca0849008c0d 100644 --- a/arch/s390/kernel/uv.c +++ b/arch/s390/kernel/uv.c @@ -134,14 +134,15 @@ static int uv_destroy(unsigned long paddr) */ int uv_destroy_folio(struct folio *folio) { + unsigned long i; int rc; =20 - /* Large folios cannot be secure */ - if (unlikely(folio_test_large(folio))) - return 0; - folio_get(folio); - rc =3D uv_destroy(folio_to_phys(folio)); + for (i =3D 0; i < (1 << folio_order(folio)); i++) { + rc =3D uv_destroy(folio_to_phys(folio) + i * PAGE_SIZE); + if (rc) + break; + } if (!rc) clear_bit(PG_arch_1, &folio->flags.f); folio_put(folio); @@ -183,14 +184,15 @@ EXPORT_SYMBOL_GPL(uv_convert_from_secure); */ int uv_convert_from_secure_folio(struct folio *folio) { + unsigned long i; int rc; =20 - /* Large folios cannot be secure */ - if (unlikely(folio_test_large(folio))) - return 0; - folio_get(folio); - rc =3D uv_convert_from_secure(folio_to_phys(folio)); + for (i =3D 0; i < (1 << folio_order(folio)); i++) { + rc =3D uv_convert_from_secure(folio_to_phys(folio) + i * PAGE_SIZE); + if (rc) + break; + } if (!rc) clear_bit(PG_arch_1, &folio->flags.f); folio_put(folio); --=20 2.52.0