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([220.120.90.131]) by smtp.gmail.com with ESMTPSA id 41be03b00d2f7-cd3d9e07329sm2603662a12.5.2026.10.10.15.57.22 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Sat, 10 Oct 2026 15:57:26 -0700 (PDT) From: Anisa Su X-Google-Original-From: Anisa Su To: linux-cxl@vger.kernel.org Cc: nvdimm@lists.linux.dev, linux-kernel@vger.kernel.org, Dave Jiang , Alison Schofield , Jonathan Cameron , Davidlohr Bueso , Ira Weiny , Vishal Verma , Fan Ni , Li Ming , Benjamin Cheatham , Gregory Price , Richard Cheng , Anisa Su Subject: [PATCH v16 5/8] cxl/pci: Factor out interrupt policy check Date: Sun, 11 Oct 2026 07:54:56 +0900 Message-ID: <20261010225852.10727-6-anisa.su@samsung.com> X-Mailer: git-send-email 2.43.0 In-Reply-To: <20261010225852.10727-1-anisa.su@samsung.com> References: <20261010225852.10727-1-anisa.su@samsung.com> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit From: Ira Weiny Dynamic Capacity Devices (DCD) require event interrupts to process memory addition or removal. BIOS may have control over non-DCD event processing. DCD interrupt configuration needs to be separate from memory event interrupt configuration. Factor out check for firmware ownership of memory event logs. Link: https://lore.kernel.org/all/663922b475e50_d54d72945b@dwillia2-xfh.jf.intel.com.notmuch/ [1] Suggested-by: Dan Williams Signed-off-by: Ira Weiny Signed-off-by: Anisa Su Tested-by: Wonjae Lee Tested-by: Junhee Park Tested-by: Heesoo Kim Reviewed-by: Dave Jiang Reviewed-by: Jonathan Cameron Reviewed-by: Fan Ni Reviewed-by: Li Ming Reviewed-by: Davidlohr Bueso Reviewed-by: Alison Schofield Reviewed-by: Richard Cheng --- drivers/cxl/pci.c | 13 +++++++++---- 1 file changed, 9 insertions(+), 4 deletions(-) diff --git a/drivers/cxl/pci.c b/drivers/cxl/pci.c index 4867657f5526..7b754af2168d 100644 --- a/drivers/cxl/pci.c +++ b/drivers/cxl/pci.c @@ -640,6 +640,14 @@ static bool cxl_event_int_is_fw(u8 setting) return mode == CXL_INT_FW; } +static bool cxl_event_fw_owns_mem_logs(struct cxl_event_interrupt_policy *policy) +{ + return cxl_event_int_is_fw(policy->info_settings) || + cxl_event_int_is_fw(policy->warn_settings) || + cxl_event_int_is_fw(policy->failure_settings) || + cxl_event_int_is_fw(policy->fatal_settings); +} + static int cxl_event_config(struct pci_host_bridge *host_bridge, struct cxl_memdev_state *mds, bool irq_avail) { @@ -662,10 +670,7 @@ static int cxl_event_config(struct pci_host_bridge *host_bridge, if (rc) return rc; - if (cxl_event_int_is_fw(policy.info_settings) || - cxl_event_int_is_fw(policy.warn_settings) || - cxl_event_int_is_fw(policy.failure_settings) || - cxl_event_int_is_fw(policy.fatal_settings)) { + if (cxl_event_fw_owns_mem_logs(&policy)) { dev_err(mds->cxlds.dev, "FW still in control of Event Logs despite _OSC settings\n"); return -EBUSY; -- 2.43.0