From: Dan Williams <dan.j.williams@intel.com>
To: Robert Richter <rrichter@amd.com>,
Alison Schofield <alison.schofield@intel.com>,
Vishal Verma <vishal.l.verma@intel.com>,
"Ira Weiny" <ira.weiny@intel.com>,
Ben Widawsky <bwidawsk@kernel.org>,
"Dan Williams" <dan.j.williams@intel.com>
Cc: <linux-cxl@vger.kernel.org>, <linux-kernel@vger.kernel.org>,
Bjorn Helgaas <bhelgaas@google.com>,
"Rafael J. Wysocki" <rafael@kernel.org>,
Len Brown <lenb@kernel.org>,
Jonathan Cameron <Jonathan.Cameron@huawei.com>,
"Davidlohr Bueso" <dave@stgolabs.net>,
Robert Richter <rrichter@amd.com>
Subject: RE: [PATCH v2 05/12] cxl/acpi: Improve debug messages in cxl_acpi_probe()
Date: Thu, 20 Oct 2022 18:00:15 -0700 [thread overview]
Message-ID: <6351ef1f70cc6_4da329414@dwillia2-xfh.jf.intel.com.notmuch> (raw)
In-Reply-To: <20221018132341.76259-6-rrichter@amd.com>
Robert Richter wrote:
> In cxl_acpi_probe() the iterator bus_for_each_dev() walks through all
> CXL hosts. Since all dev_*() debug messages point to the ACPI0017
> device which is the CXL root for all hosts, the device information is
> pointless as it is always the same device. Change this to use the host
> device for this instead.
>
> Also, add additional host specific information such as CXL support,
> UID and CHBCR.
>
> This is an example log:
>
> acpi ACPI0016:00: UID found: 4
> acpi ACPI0016:00: CHBCR found: 0x28090000000
> acpi ACPI0016:00: dport added to root0
> acpi ACPI0016:00: host-bridge: ACPI0016:00
> pci0000:7f: host supports CXL
>
> Signed-off-by: Robert Richter <rrichter@amd.com>
> ---
> drivers/cxl/acpi.c | 12 ++++++++----
> 1 file changed, 8 insertions(+), 4 deletions(-)
>
> diff --git a/drivers/cxl/acpi.c b/drivers/cxl/acpi.c
> index 31e104f0210f..fb9f72813067 100644
> --- a/drivers/cxl/acpi.c
> +++ b/drivers/cxl/acpi.c
> @@ -221,6 +221,8 @@ static int add_host_bridge_uport(struct device *match, void *arg)
> if (IS_ERR(port))
> return PTR_ERR(port);
>
> + dev_info(pci_root->bus->bridge, "host supports CXL\n");
> +
I generally advocate for drivers to be silent, but this is a fundamental
message in a place that is helpful to indicate whether platform-firmware
is doing its job correctly, and it's only once per host bridge.
Applied for v6.2.
next prev parent reply other threads:[~2022-10-21 1:00 UTC|newest]
Thread overview: 34+ messages / expand[flat|nested] mbox.gz Atom feed top
2022-10-18 13:23 [PATCH v2 00/12] cxl: Add support for Restricted CXL hosts (RCD mode) Robert Richter
2022-10-18 13:23 ` [PATCH v2 01/12] cxl/core: Remove duplicate declaration of devm_cxl_iomap_block() Robert Richter
2022-10-20 23:56 ` Dan Williams
2022-10-21 8:54 ` Robert Richter
2022-10-18 13:23 ` [PATCH v2 02/12] cxl/core: Check physical address before mapping it in devm_cxl_iomap_block() Robert Richter
2022-10-21 0:01 ` Dan Williams
2022-10-18 13:23 ` [PATCH v2 03/12] cxl: Unify debug messages when calling devm_cxl_add_port() Robert Richter
2022-10-21 0:20 ` Dan Williams
2022-10-21 8:57 ` Robert Richter
2022-10-18 13:23 ` [PATCH v2 04/12] cxl: Unify debug messages when calling devm_cxl_add_dport() Robert Richter
2022-10-21 0:32 ` Dan Williams
2022-10-21 9:00 ` Robert Richter
2022-10-18 13:23 ` [PATCH v2 05/12] cxl/acpi: Improve debug messages in cxl_acpi_probe() Robert Richter
2022-10-21 1:00 ` Dan Williams [this message]
2022-10-18 13:23 ` [PATCH v2 06/12] cxl/acpi: Extract component registers of restricted hosts from RCRB Robert Richter
2022-10-18 13:31 ` Rafael J. Wysocki
2022-10-18 18:41 ` Robert Richter
2022-10-18 18:57 ` Rafael J. Wysocki
2022-10-19 10:46 ` Robert Richter
2022-10-21 5:17 ` Dan Williams
2022-10-24 21:04 ` Robert Richter
2022-10-24 21:24 ` Dan Williams
2022-10-24 22:37 ` Dan Williams
[not found] ` <63cd195a-f5d0-b016-d833-b3a9c86ff6ee@intel.com>
2022-10-24 23:50 ` Robert Richter
2022-10-24 23:57 ` Dan Williams
2022-10-18 13:23 ` [PATCH v2 07/12] cxl: Remove dev_is_cxl_root_child() check in devm_cxl_enumerate_ports() Robert Richter
2022-10-21 5:38 ` Dan Williams
2022-10-21 6:32 ` Verma, Vishal L
2022-11-09 14:33 ` Robert Richter
2022-10-18 13:23 ` [PATCH v2 08/12] cxl: Factor out code in devm_cxl_enumerate_ports() to find_port_attach_ep() Robert Richter
2022-10-18 13:23 ` [PATCH v2 09/12] cxl: Extend devm_cxl_enumerate_ports() to support restricted devices (RCDs) Robert Richter
2022-10-18 13:23 ` [PATCH v2 10/12] cxl: Do not ignore PCI config read errors in match_add_dports() Robert Richter
2022-10-18 13:23 ` [PATCH v2 11/12] cxl: Factor out code in match_add_dports() to pci_dev_add_dport() Robert Richter
2022-10-18 13:23 ` [PATCH v2 12/12] cxl: Extend devm_cxl_port_enumerate_dports() to support restricted hosts (RCH) Robert Richter
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