arm64/acpi: Create arch specific cpu to acpi id helper

jlintonarm · ctmarinas · commit 30d87bfacbee · 2018-05-17T17:28:09.000+01:00
Its helpful to be able to lookup the acpi_processor_id associated
with a logical cpu. Provide an arm64 helper to do this.

Tested-by: Ard Biesheuvel &lt;ard.biesheuvel@linaro.org&gt;
Tested-by: Vijaya Kumar K &lt;vkilari@codeaurora.org&gt;
Tested-by: Xiongfeng Wang &lt;wangxiongfeng2@huawei.com&gt;
Tested-by: Tomasz Nowicki &lt;Tomasz.Nowicki@cavium.com&gt;
Acked-by: Ard Biesheuvel &lt;ard.biesheuvel@linaro.org&gt;
Acked-by: Sudeep Holla &lt;sudeep.holla@arm.com&gt;
Signed-off-by: Jeremy Linton &lt;jeremy.linton@arm.com&gt;
Signed-off-by: Catalin Marinas &lt;catalin.marinas@arm.com&gt;
diff --git a/arch/arm64/include/asm/acpi.h b/arch/arm64/include/asm/acpi.h
@@ -86,6 +86,10 @@ static inline bool acpi_has_cpu_in_madt(void)
 }
 
 struct acpi_madt_generic_interrupt *acpi_cpu_get_madt_gicc(int cpu);
+static inline u32 get_acpi_id_for_cpu(unsigned int cpu)
+{
+	return	acpi_cpu_get_madt_gicc(cpu)->uid;
+}
 
 static inline void arch_fix_phys_package_id(int num, u32 slot) { }
 void __init acpi_init_cpus(void);

Original file line number	Diff line number	Diff line change
`@@ -86,6 +86,10 @@ static inline bool acpi_has_cpu_in_madt(void)`
`86`	`86`	`}`
`87`	`87`
`88`	`88`	`struct acpi_madt_generic_interrupt *acpi_cpu_get_madt_gicc(int cpu);`
	`89`	`+static inline u32 get_acpi_id_for_cpu(unsigned int cpu)`
	`90`	`+{`
	`91`	`+ return acpi_cpu_get_madt_gicc(cpu)->uid;`
	`92`	`+}`
`89`	`93`
`90`	`94`	`static inline void arch_fix_phys_package_id(int num, u32 slot) { }`
`91`	`95`	`void __init acpi_init_cpus(void);`