Re: [PATCH v3 1/7] ACPI/PPTT: Add Processor Properties Topology Table parsing

[Christ, Austin]

Hey Jeremy,

Quick comment below.

On 10/12/2017 1:48 PM, Jeremy Linton wrote:
> +static int topology_setup_acpi_cpu(struct acpi_table_header *table,
> +				    unsigned int cpu, int level)
> +{
> +	struct acpi_pptt_processor *cpu_node;
> +	u32 acpi_cpu_id = acpi_cpu_get_madt_gicc(cpu)->uid;

This lookup for the acpi id is architecture dependent. Can you use a 
function that would work for any user of PPTT and MADT? It may require 
writing and exporting the inverse lookup of the function 
acpi_get_cpuid() which is exported from processor_core.c

> +
> +	cpu_node = acpi_find_processor_node(table, acpi_cpu_id);
> +	if (cpu_node) {
> +		cpu_node = acpi_find_processor_package_id(table, cpu_node, level);
> +		/* Only the first level has a guaranteed id */
> +		if (level == 0)
> +			return cpu_node->acpi_processor_id;
> +		return (int)((u8 *)cpu_node - (u8 *)table);
> +	}
> +	pr_err_once("PPTT table found, but unable to locate core for %d\n",
> +		    cpu);
> +	return -ENOENT;
> +}

--
Austin Christ
Qualcomm Datacenter Technologies as an affiliate of Qualcomm 
Technologies, Inc.
Qualcomm Technologies, Inc. is a member of the
Code Aurora Forum, a Linux Foundation Collaborative Project.