From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mail-pl1-f174.google.com (mail-pl1-f174.google.com [209.85.214.174]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id D630F204F8B; Thu, 17 Jul 2025 16:22:42 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=209.85.214.174 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1752769364; cv=none; b=CWCOSotJvYTyCuD52zwp1me5o75OPnPu33Iv31KMchsMWrHkDahG2s5GeWd50t0HKEBVOZuKC8fPS/KIelqDa/C15x8/Ly1hm1VkflDBNECCfDYNIXNCTJmj98w8r9d+otiUISfX2AD5XTBIKfzVLbMPLSS5bjXi9OilM3NV4QE= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1752769364; c=relaxed/simple; bh=joK5l4nAFeBogzgih6ugtfRfS/lwf2F2gFNZEzyH2oo=; h=From:To:Cc:Subject:Date:Message-ID:MIME-Version; b=LT0kPLf2JmI5t5uYEq905HPUDyP6auFEvt4QbaZEpp0uTqLeFEs486UkX56qh0f+H3/CMJP3DiAQGeqqOfJNxO31SLihy6iOXBbuivnmgRs8xsbjAQMxlNUCUoGjlh6r0FRvsmo3hniMATGBeKpfhImza+gS+W/6jJjxElJcdoI= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=gmail.com; spf=pass smtp.mailfrom=gmail.com; dkim=pass (2048-bit key) header.d=gmail.com header.i=@gmail.com header.b=YVwQ4ywj; arc=none smtp.client-ip=209.85.214.174 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=gmail.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=gmail.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=gmail.com header.i=@gmail.com header.b="YVwQ4ywj" Received: by mail-pl1-f174.google.com with SMTP id d9443c01a7336-236470b2dceso10050035ad.0; Thu, 17 Jul 2025 09:22:42 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20230601; t=1752769362; x=1753374162; darn=vger.kernel.org; h=content-transfer-encoding:mime-version:message-id:date:subject:cc :to:from:from:to:cc:subject:date:message-id:reply-to; bh=p3chhfnIFWg2q3Kmk+pYjIH7D8dXZu6jh32Z7UgtC1M=; b=YVwQ4ywjFWn/UO5b4WgOPGvUelb8IhPmlDz5CTdYbF0vnakaaS/oQP8oiW5VroFclx UY+0B68vr/j3234H8ZpuU3VBqmytlr36ghB9w5exMYp3ATJXgljnPYui+dB0ejTo2WGZ rDCsbmpacoj9Qp+shKflax7sBTdx1KeAfwPvvBObRdFn9YwSdONGg9Vr/lFIIdqLpV2R xe8qjIJ9FEMfipbDpt66P84vG5GSuQloO+zkDP4w9LFAO4OT3SQ8g8drC58FqZclP2MO RXHv+MLVKELxhc7V86tCWR4lf8K5bgnp61ftMLiINaM5Ue/zh6KAwWYlTs66AdJOsOR2 u9lQ== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1752769362; x=1753374162; h=content-transfer-encoding:mime-version:message-id:date:subject:cc :to:from:x-gm-message-state:from:to:cc:subject:date:message-id :reply-to; bh=p3chhfnIFWg2q3Kmk+pYjIH7D8dXZu6jh32Z7UgtC1M=; b=w9G56Sp2lBtzQAt46ZWZOXTzTRkGuWiEzcXFqu5tPIuf9GcNJHRaQvf4tfuYNnQL1P 8BHNbXxCu0ni4qyBzJTWyBgwRZcIgkHU769m32FHlnLB56hNygQoR/JuQrbhItQBW/d9 vbVhrGBi6Wl9iP8QQpF8urC+v0P/gSAWQCPHrKE92s01+/CrnVcbkK4TxLXUkCq8vKee tTjSqODUZzQDESjVPJrFcx+vmR3RMNc9vOU30D5qyGLkP9XLmGQ/qw5qS8q/LMwhBOxM hlouhbm9yVW27OKFI0S17avjBLwctqlVN4ugAGeWdexiDKZl+JDj41gl17iwLCO+TRNW ooWw== X-Forwarded-Encrypted: i=1; AJvYcCUHdjJLbn4wLxnxOEBX4LTzQat9BWM6Lfgo5C9i+Qkf6x6MFF3lTwoayo4KURDr0InzxtqpSBRGJtLU@vger.kernel.org, AJvYcCW0pnyOsrrtXUBGP5mLedYdH+C4TMHx326S+tmmyseAg6Zu9rfaJlWg8JIQfcHV1RalNDltUYCt2MIQF/Y=@vger.kernel.org X-Gm-Message-State: AOJu0YwODSmo428+IyaVGHpAAgfIblP/9MXMwAGFYb+iJfZkYpYhUP1M T3lHRuecB+RrlGAIr/yFuppflxcuRTkG9X40LiFUzfMvy75Ph5MqxVOESe9g1g== X-Gm-Gg: ASbGncs5V/Pxr2Sty1hWvuX0h6Qt8cRHpZLuB/h+mrjp4z6g7HvL4Htw57RYT2LdVpK XEeMHooqq6QbeIAK1oEa5idmdXJJ5eF1WNSwDHgML4kqAMSENFmfolFgMQlk5Xld27LEbGhN1bk y1hv19FHUvHYBh1TKbjgOVPxp31VVdicVg6MCbpE/KcIoC60qwCgfAkMlMFc9pl/hFgSHUDYdQ6 XLfGCsAKNdd4elWMFDLA/WZWYYouOr7aDzSIgkeToa725kPRrMjGAMbwFUz1i2O04QlwL3VmI5I e4U8PjXyBi/3tkddlqUSqjlq/0DIFy+CzW1zDnNqdRs2tT7Bi09dSaW/pZsa9Ho9gAT0yFtdU4V wovq540U+VYTfP8/11DIx5hAAIE8a8Y9qMW74OQg= X-Google-Smtp-Source: AGHT+IEX1e1H04bR/uRlXyS7o4hwZpN+MsLD5ZNyPP8F38qeRWSqFEX2upZklybtjx8gcj8JujXN6A== X-Received: by 2002:a17:902:da8a:b0:23c:8f21:ac59 with SMTP id d9443c01a7336-23e2572b0c0mr113058355ad.29.1752769361832; Thu, 17 Jul 2025 09:22:41 -0700 (PDT) Received: from localhost ([2600:1700:22f5:908f:1457:7499:d258:358f]) by smtp.gmail.com with ESMTPSA id d9443c01a7336-23de434c264sm146145065ad.201.2025.07.17.09.22.41 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Thu, 17 Jul 2025 09:22:41 -0700 (PDT) From: Matthew Wood To: "Bjorn Helgaas" Cc: "Jonathan Cameron" , =?UTF-8?q?Thomas=20Wei=C3=9Fschuh?= , linux-pci@vger.kernel.org, linux-kernel@vger.kernel.org Subject: [PATCH v4 0/1] PCI/sysfs: Expose PCIe device serial number Date: Thu, 17 Jul 2025 09:22:38 -0700 Message-ID: <20250717162240.512045-1-thepacketgeek@gmail.com> X-Mailer: git-send-email 2.50.0 Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Add a single sysfs read-only, admin-only interface for reading PCIe device serial numbers from userspace, using the same hexadecimal 1-byte dashed formatting as lspci serial number capability output: more /sys/devices/pci0000:c0/0000:c0:01.1/0000:c1:00.0/0000:c2:1f.0/0000:ef:00.0/serial_number 00-80-ee-00-00-00-41-80 If a device doesn't support the serial number capability, the serial_number sysfs attribute will not be visible. Comparing serial number format to lspci output: sudo lspci -vvv -s ef:00.0 ef:00.0 Serial Attached SCSI controller: Broadcom / LSI PCIe Switch management endpoint (rev b0) Subsystem: Broadcom / LSI Device 0144 ... Capabilities: [100 v1] Device Serial Number 00-80-ee-00-00-00-41-80 ... This PCIe device sysfs attribute eliminates the need for parsing lspci output (e.g. regexp) for userspace applications that utilize serial numbers. Matthew Wood (1): PCI/sysfs: Expose PCIe device serial number Documentation/ABI/testing/sysfs-bus-pci | 9 +++++++++ drivers/pci/pci-sysfs.c | 26 ++++++++++++++++++++++--- 2 files changed, 32 insertions(+), 3 deletions(-) -- 2.50.0