From patchwork Thu Feb 27 16:28:21 2025 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Hans Zhang <18255117159@163.com> X-Patchwork-Id: 13994888 X-Patchwork-Delegate: bhelgaas@google.com Received: from m16.mail.163.com (m16.mail.163.com [220.197.31.4]) by smtp.subspace.kernel.org (Postfix) with ESMTP id 43E461B0424; Thu, 27 Feb 2025 16:29:49 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=220.197.31.4 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1740673794; cv=none; b=HAnKpwTr5a/r5fl4WNngiIy9EOozxMwl3oyyCes2ZcQNGYCehCpyz3VRpfICgdWpXll3o8uIaUPuj0Q71D9zMAATUq5Mi/x/RgO5CIzXV9RoKBOy7M30vncSAJ4BVkp9DhFg68MAYPFAwZNbHt1HV33jH0LnOabmoLoVKPStmHU= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1740673794; c=relaxed/simple; bh=A4CTCMtqzteIMnkNZTip3GKEW+1+PgI9x/4aI8hqOM0=; h=From:To:Cc:Subject:Date:Message-Id:MIME-Version; b=K2PoxZTmIB0wc07MlnbS0g0XWMONUhv2MwjOCrlBxTIFzwb2fGm44nGln+njNs9OSxENCy6Qk6R2446mWgEFA8lZSWdmegLLIVTBh5mf5aT3XQCysqc+XC5vBBV8E1uVHERikLx4eO3FtAhOjf7uT3DLl4zMHlZBRMapKiXfaGs= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=163.com; spf=pass smtp.mailfrom=163.com; dkim=pass (1024-bit key) header.d=163.com header.i=@163.com header.b=ViIgTwqw; arc=none smtp.client-ip=220.197.31.4 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=163.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=163.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=163.com header.i=@163.com header.b="ViIgTwqw" DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=163.com; s=s110527; h=From:Subject:Date:Message-Id:MIME-Version; bh=8KKMS vcGBYzx/WXKXqtiTwnIOJ6axQoKyOMDp2Y1KoQ=; b=ViIgTwqwiY9YEpnHd/Mx/ Ev+EpQW7nOalI2rlkw3uugm0w4SPZI6Ene9TsLJo6dTg2PTpwYBvjk9nS0CuWRKU kdzrpHN/B7ke2qtDdJ7+xy+elVHXse5+nRRJHYUpKotvJhIaEtQ4UqStkdqUhhJT 4VCwDfAJ4y7hPstuh9nQbY= Received: from localhost.localdomain (unknown []) by gzga-smtp-mtada-g1-3 (Coremail) with SMTP id _____wD3d8SoksBnzyN4PA--.58111S2; Fri, 28 Feb 2025 00:28:24 +0800 (CST) From: Hans Zhang <18255117159@163.com> To: tglx@linutronix.de Cc: manivannan.sadhasivam@linaro.org, kw@linux.com, kwilczynski@kernel.org, bhelgaas@google.com, cassel@kernel.org, linux-pci@vger.kernel.org, linux-kernel@vger.kernel.org, Hans Zhang <18255117159@163.com> Subject: [PATCH] genirq/msi: Add the address and data that show MSI/MSIX Date: Fri, 28 Feb 2025 00:28:21 +0800 Message-Id: <20250227162821.253020-1-18255117159@163.com> X-Mailer: git-send-email 2.25.1 Precedence: bulk X-Mailing-List: linux-pci@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-CM-TRANSID: _____wD3d8SoksBnzyN4PA--.58111S2 X-Coremail-Antispam: 1Uf129KBjvJXoW7WrWfWryftw4fCryUuFWrGrg_yoW8WFyrpr WDJF43Gr48Jw1jqw47uFnrur1UXF4vvayfGr45Xw1SkwnIgwnFyryDKayxG3W3tr4ru3WY y3Wqyw42krn8A3DanT9S1TB71UUUUU7qnTZGkaVYY2UrUUUUjbIjqfuFe4nvWSU5nxnvy2 9KBjDUYxBIdaVFxhVjvjDU0xZFpf9x0pEl1vDUUUUU= X-CM-SenderInfo: rpryjkyvrrlimvzbiqqrwthudrp/1tbiDxUBo2fAkBQ-OQAAsd Add to view the addresses and data stored in the MSI capability or the addresses and data stored in the MSIX vector table. e.g. root@root:/sys/bus/pci/devices//msi_irqs# ls 86 87 88 89 root@root:/sys/bus/pci/devices//msi_irqs# cat * msix address_hi: 0x00000000 address_lo: 0x0e060040 msg_data: 0x00000000 msix address_hi: 0x00000000 address_lo: 0x0e060040 msg_data: 0x00000001 msix address_hi: 0x00000000 address_lo: 0x0e060040 msg_data: 0x00000002 msix address_hi: 0x00000000 address_lo: 0x0e060040 msg_data: 0x00000003 Signed-off-by: Hans Zhang <18255117159@163.com> --- kernel/irq/msi.c | 12 +++++++++++- 1 file changed, 11 insertions(+), 1 deletion(-) base-commit: dd83757f6e686a2188997cb58b5975f744bb7786 diff --git a/kernel/irq/msi.c b/kernel/irq/msi.c index 396a067a8a56..a37a3e535fb8 100644 --- a/kernel/irq/msi.c +++ b/kernel/irq/msi.c @@ -503,8 +503,18 @@ static ssize_t msi_mode_show(struct device *dev, struct device_attribute *attr, { /* MSI vs. MSIX is per device not per interrupt */ bool is_msix = dev_is_pci(dev) ? to_pci_dev(dev)->msix_enabled : false; + struct msi_desc *desc; + u32 irq; + + if (kstrtoint(attr->attr.name, 10, &irq) < 0) + return 0; - return sysfs_emit(buf, "%s\n", is_msix ? "msix" : "msi"); + desc = irq_get_msi_desc(irq); + return sysfs_emit( + buf, + "%s\n address_hi: 0x%08x\n address_lo: 0x%08x\n msg_data: 0x%08x\n", + is_msix ? "msix" : "msi", desc->msg.address_hi, + desc->msg.address_lo, desc->msg.data); } static void msi_sysfs_remove_desc(struct device *dev, struct msi_desc *desc)