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X-Spam-Score: -2.1 (--) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Archive: List-Post: List-Help: List-Subscribe: , Sender: "linux-arm-kernel" X-Spam-Status: No, score=-8.9 required=3.0 tests=BAYES_00,DKIMWL_WL_HIGH, DKIM_SIGNED,DKIM_VALID,DKIM_VALID_AU,DKIM_VALID_EF, HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI,SPF_HELO_NONE, SPF_PASS,USER_AGENT_GIT autolearn=ham autolearn_force=no version=4.0.1 X-Spam-Checker-Version: SpamAssassin 4.0.1 (2024-03-26) on aws-us-west-2-korg-listserv-alma10-1 On Thu, Nov 12, 2026 at 11:14:08AM +0000, Sudeep Holla wrote: [...] > + guard(mutex)(&ffa_version_lock); > + if (!ffa_version) { > + invoke(&args, &res); Can this scenario happen? 1) pKVM is enabled but not yet initialised, and offset-2 AML runs (e.g. during the initial ACPI scan), so ffh.c gets here first and negotiates directly with EL3. 2) The result is cached. 3) Once pKVM is up, ffa_version_check() gets the cached version and never sends FFA_VERSION through the proxy. If so, then I think kvm_host_ffa_handler() would reject the transport's calls, since has_version_negotiated is never set. Should we decline here instead, without caching, while is_protected_kvm_enabled() && !is_pkvm_initialized(), like ffa_probe() already does?