From patchwork Wed Nov 1 21:11:17 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Ira Weiny X-Patchwork-Id: 13443064 Received: from lindbergh.monkeyblade.net (lindbergh.monkeyblade.net [23.128.96.19]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id E869312B6B for ; Wed, 1 Nov 2023 21:11:46 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=intel.com header.i=@intel.com header.b="GRHYv8/L" Received: from mgamail.intel.com (mgamail.intel.com [134.134.136.126]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 778209F; Wed, 1 Nov 2023 14:11:42 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=intel.com; i=@intel.com; q=dns/txt; s=Intel; t=1698873102; x=1730409102; h=from:subject:date:message-id:mime-version: content-transfer-encoding:to:cc; bh=d2+i1aESa6COj7u5uFub21JO1xpdrNwNXm/jrZkkmng=; b=GRHYv8/LjUp+VQ/dSHcixhkrlcX2a5+iP73dW6NFIoGakyu8sijzwf5W Z/Q9/h33eNbMeHJaz1i5RbfVv45YzS0tn9EGmJ7cHlFq6p+kpNIgwbhJ4 w+S742pQ4aFxM8n1RwLGX1T5vj9TG4tNsNXwWS+CeYWom2+c8Ry4uiCxV Z54qVAWYHigskSQ93ATv5j9Ne9WG/FkSK+4RAPeGcdEGr1Ay1978eIAQl +9dZFCiFwJutKMOKST/sfezNlpmbFstyJeqcw53EipBklk4bz6kns1yyc eoH5tgttDNsMGr8anpDKtgGFGRqRvY2u8sDY3HQyd4AQ7kOpAXbS75TF8 Q==; X-IronPort-AV: E=McAfee;i="6600,9927,10881"; a="373625186" X-IronPort-AV: E=Sophos;i="6.03,269,1694761200"; d="scan'208";a="373625186" Received: from orsmga006.jf.intel.com ([10.7.209.51]) by orsmga106.jf.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 01 Nov 2023 14:11:41 -0700 X-ExtLoop1: 1 X-IronPort-AV: E=McAfee;i="6600,9927,10881"; a="737533772" X-IronPort-AV: E=Sophos;i="6.03,269,1694761200"; d="scan'208";a="737533772" Received: from iweiny-desk3.amr.corp.intel.com (HELO localhost) ([10.212.80.64]) by orsmga006-auth.jf.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 01 Nov 2023 14:11:41 -0700 From: Ira Weiny Subject: [PATCH RFC v3 0/6] efi/cxl-cper: Report CPER CXL component events through trace events Date: Wed, 01 Nov 2023 14:11:17 -0700 Message-Id: <20230601-cxl-cper-v3-0-0189d61f7956@intel.com> Precedence: bulk X-Mailing-List: linux-cxl@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-B4-Tracking: v=1; b=H4sIAPW+QmUC/3WNQQqDMBBFryJZNyUmErWrQqEH6LZ0kUwnNaBRE gkW8e6NWRVKl3/+f/NWEtBbDORUrMRjtMGOLgVxKAh0yr2Q2mfKhDMumGQlhaWnMKGnXBoDjWh BgiRprlVAqr1y0O3AoMKMfi8mj8Yu2XEnt+uFPNKxs2Ee/Tt7Y5mrX0UsKaNtq1UlTGPqmp2tm 7E/wjjkJ5H/A3kCRVk9WxBSaca/wW3bPmhVpEn3AAAA To: Dan Williams , Jonathan Cameron , Smita Koralahalli Cc: Yazen Ghannam , Davidlohr Bueso , Dave Jiang , Alison Schofield , Vishal Verma , Ard Biesheuvel , linux-efi@vger.kernel.org, linux-kernel@vger.kernel.org, linux-cxl@vger.kernel.org, Ira Weiny X-Mailer: b4 0.13-dev-0f7f0 X-Developer-Signature: v=1; a=ed25519-sha256; t=1698873100; l=3362; i=ira.weiny@intel.com; s=20221222; h=from:subject:message-id; bh=d2+i1aESa6COj7u5uFub21JO1xpdrNwNXm/jrZkkmng=; b=rzqLHTKj8l8LskzladGW4ILV2msefey0gyrj0oGgqJRfp9x20ssJ5MRDNw/vBaI2nlJB+d4h2 TYHVYbsOzfeD6e7Nb5eryr9Brnm0JGHZlKmL+J6YrDcyOfg72PXOvC8 X-Developer-Key: i=ira.weiny@intel.com; a=ed25519; pk=brwqReAJklzu/xZ9FpSsMPSQ/qkSalbg6scP3w809Ec= Series status/background ======================== This is another RFC version of processing the CXL CPER records through the CXL trace mechanisms as Dan mentioned in [1]. This raises the cxl event structures to a core header and rearranges them such that they can be shared most efficiently. Thus eliminating a memcpy Smita noticed. Also BDF is used instead of serial number. NOTE: I'm still fuzzy on which fields in the CPER record are correct to find the BDF in the Linux code. It would be nice to double check those for me. The CPER code remains compile tested only. The original event code continues to pass cxl-test. [1] https://lore.kernel.org/all/6528808cef2ba_780ef294c5@dwillia2-xfh.jf.intel.com.notmuch/ Cover letter ============ CXL Component Events, as defined by EFI 2.10 Section N.2.14, wrap a mostly CXL event payload in an EFI Common Platform Error Record (CPER) record. If a device is configured for firmware first CXL event records are not sent directly to the host. The CXL sub-system uniquely has DPA to HPA translation information. It also already properly decodes the event format. Send the CXL CPER records to the CXL sub-system for processing. With CXL event logs the device interrupts the host with events. In the EFI case events are wrapped with device information which needs to be matched with memdev devices the CXL driver is tracking. A number of alternatives were considered to match the memdev with the CPER record. The most robust was to find the PCI device via Bus, Device, Function and match it to the memdev driver data. CPER records are identified with GUID's while CXL event logs contain UUID's. The UUID was previously printed for all events. But the UUID is redundant information which presents unnecessary complexity when processing CPER data. Remove the UUIDs from known events. Restructure the code to make sharing the data between CPER/event logs most efficient. Signed-off-by: Ira Weiny --- Changes in RFC v3: - djbw: Share structures between CPER/event logs - Smita: use BDF to resolve the memdev - djbw/Smita: various cleanups - Link to v2: https://lore.kernel.org/r/20230601-cxl-cper-v2-0-314d9c36ab02@intel.com --- Ira Weiny (6): cxl/trace: Remove uuid from event trace known events cxl/events: Promote CXL event structures to a core header cxl/events: Remove UUID from non-generic event structures cxl/events: Create a CXL event union firmware/efi: Process CXL Component Events cxl/memdev: Register for and process CPER events drivers/cxl/core/mbox.c | 57 +++++++++----- drivers/cxl/core/trace.h | 18 ++--- drivers/cxl/cxlmem.h | 96 ++--------------------- drivers/cxl/pci.c | 59 +++++++++++++- drivers/firmware/efi/cper.c | 15 ++++ drivers/firmware/efi/cper_cxl.c | 40 ++++++++++ drivers/firmware/efi/cper_cxl.h | 29 +++++++ include/linux/cxl-event.h | 160 ++++++++++++++++++++++++++++++++++++++ tools/testing/cxl/test/mem.c | 166 +++++++++++++++++++++++----------------- 9 files changed, 451 insertions(+), 189 deletions(-) --- base-commit: 1c8b86a3799f7e5be903c3f49fcdaee29fd385b5 change-id: 20230601-cxl-cper-26ffc839c6c6 Best regards,