[PATCH v8 11/13] arm64: topology: enable ACPI/PPTT based CPU topology

Sudeep Holla sudeep.holla at arm.com
Tue May 1 07:46:22 PDT 2018

On 26/04/18 00:31, Jeremy Linton wrote:
> Propagate the topology information from the PPTT tree to the
> cpu_topology array. We can get the thread id and core_id by assuming
> certain levels of the PPTT tree correspond to those concepts.
> The package_id is flagged in the tree and can be found by calling
> find_acpi_cpu_topology_package() which terminates
> its search when it finds an ACPI node flagged as the physical
> package. If the tree doesn't contain enough levels to represent
> all of the requested levels then the root node will be returned
> for all subsequent levels.

Acked-by: Sudeep Holla <sudeep.holla at arm.com>


> @@ -304,6 +345,8 @@ void __init init_cpu_topology(void)
>  	 * Discard anything that was parsed if we hit an error so we
>  	 * don't use partial information.
>  	 */
> -	if (of_have_populated_dt() && parse_dt_topology())
> +	if ((!acpi_disabled) && parse_acpi_topology())

[nit] not sure if extra () is need above, but I am fine either way.


More information about the linux-riscv mailing list