[PATCH v2 1/3] PCI: trace: Add PCI controller LTSSM transition tracepoint

[Steven Rostedt]

On Fri,  9 Jan 2026 11:29:47 +0800
Shawn Lin <shawn.lin at rock-chips.com> wrote:

> +	TP_printk("dev: %s state: %s rate: %s",
> +		__get_str(dev_name), __get_str(state),
> +		__print_symbolic(__entry->rate,
> +			{ PCIE_SPEED_2_5GT,  "2.5 GT/s" },
> +			{ PCIE_SPEED_5_0GT,  "5.0 GT/s" },
> +			{ PCIE_SPEED_8_0GT,  "8.0 GT/s" },
> +			{ PCIE_SPEED_16_0GT, "16.0 GT/s" },
> +			{ PCIE_SPEED_32_0GT, "32.0 GT/s" },
> +			{ PCIE_SPEED_64_0GT, "64.0 GT/s" },
> +			{ PCI_SPEED_UNKNOWN, "Unknown" }

As these values are all enums, you may want to add in this file:

TRACE_DEFINE_ENUM(PCIE_SPEED_2_5GT);
TRACE_DEFINE_ENUM(PCIE_SPEED_5_0GT);
[..]
TRACE_DEFINE_ENUM(PCIE_SPEED_UNKNOWN);

So that this can be parsed by user space tooling such as trace-cmd and
perf.

-- Steve


> +		)
> +	)
> +);
> +