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Fri, 14 Aug 2026 03:06:54 -0700 (PDT) Received: from jwang-ThinkPad-T14-Gen-6.fkb.profitbricks.net ([2001:9e8:144c:bd00:56c3:670b:dfc6:d046]) by smtp.gmail.com with ESMTPSA id ffacd0b85a97d-4815f2b1d9bsm6948207f8f.24.2026.08.14.03.06.53 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Fri, 14 Aug 2026 03:06:53 -0700 (PDT) From: Jack Wang To: gregkh@linuxfoundation.org, sashal@kernel.org, stable@vger.kernel.org Cc: dmitrii.omelchenko@cloud.ionos.com, Jack Wang Subject: [PATCH 6.12.y 0/4] crypto: ccp, KVM: SVM - missing SEV/SNP platform-init dependency + 2 bugfixes Date: Fri, 14 Aug 2026 12:02:53 +0200 Message-ID: <20260814100652.225499-1-jinpu.wang@ionos.com> X-Mailer: git-send-email 2.43.0 Precedence: bulk X-Mailing-List: stable@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit From: Jack Wang Hello Greg, hello Sasha Backport of 4 upstream commits to 6.12.y (applies on stable-rc queue/6.12), Option 3 of stable-kernel-rules.rst (no Cc: stable tag upstream). Patches 1-2 are the missing dependencies of commit 3f8f0133a5fc ("crypto: ccp - Move SEV/SNP Platform initialization to KVM"), already queued as of 6.12.97 (bb1c8464702540 on queue/6.12). That commit dropped SEV/SNP platform init from the CCP driver's probe path, expecting KVM to take over, but the counterpart commits that give KVM that responsibility were never queued alongside it. Net effect: 6.12.97+ has no code path left that initializes SEV/SNP, so starting a SEV-SNP guest crashes the host. 1) crypto: ccp - Add new SEV/SNP platform shutdown API Upstream f7b86e0e75bc234751cb7a82d888083a57ef28b2 2) KVM: SVM: Add support to initialize SEV/SNP functionality in KVM Upstream 6f1d5a3513c2370bbd6115dd430906bc2f4bdc53 Patches 3-4 are unrelated, independent bugfixes: 3) crypto: ccp - Fix checks for SNP_VLEK_LOAD input buffer length Upstream ed53a5050f42a3243a7ed8dfa49030e54034b952 Context deviation: 6.12.y lacks the SEV_CMD_SNP_FEATURE_INFO case the upstream hunk anchors on (added later, not queued here), so the new case was placed after SEV_CMD_SNP_COMMIT instead. No functional difference; noted as [Jack: ...] in the commit. 4) crypto: ccp - Abort doing SEV INIT if SNP INIT fails Upstream 6131e119f5799bec55535530fa2fc44f5c7be1f1 Fixes SEV INIT succeeding to be issued (and failing) even when SNP host support is enabled and SNP_INIT(_EX) hasn't succeeded. Patches 1, 2 and 4 applied clean; only patch 3 needed the context adjustment above. Please consider queue them for future release. Thanks, Jack Wang @ IONOS Cloud Ashish Kalra (3): crypto: ccp - Add new SEV/SNP platform shutdown API KVM: SVM: Add support to initialize SEV/SNP functionality in KVM crypto: ccp - Abort doing SEV INIT if SNP INIT fails Michael Roth (1): crypto: ccp - Fix checks for SNP_VLEK_LOAD input buffer length arch/x86/kvm/svm/sev.c | 12 ++++++++++++ drivers/crypto/ccp/sev-dev.c | 17 ++++++++++++----- include/linux/psp-sev.h | 3 +++ 3 files changed, 27 insertions(+), 5 deletions(-) -- 2.43.0