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[v9,04/12] arm64/acpi: Create arch specific cpu to acpi id helper

Message ID 20180511235807.30834-5-jeremy.linton@arm.com (mailing list archive)
State Not Applicable, archived
Headers show

Commit Message

Jeremy Linton May 11, 2018, 11:57 p.m. UTC 
Its helpful to be able to lookup the acpi_processor_id associated
with a logical cpu. Provide an arm64 helper to do this.

Signed-off-by: Jeremy Linton <jeremy.linton@arm.com>
Tested-by: Ard Biesheuvel <ard.biesheuvel@linaro.org>
Tested-by: Vijaya Kumar K <vkilari@codeaurora.org>
Tested-by: Xiongfeng Wang <wangxiongfeng2@huawei.com>
Tested-by: Tomasz Nowicki <Tomasz.Nowicki@cavium.com>
Acked-by: Ard Biesheuvel <ard.biesheuvel@linaro.org>
---
 arch/arm64/include/asm/acpi.h | 4 ++++
 1 file changed, 4 insertions(+)

Comments

Sudeep Holla May 14, 2018, 2:41 p.m. UTC | #1 
On 12/05/18 00:57, Jeremy Linton wrote:
> Its helpful to be able to lookup the acpi_processor_id associated
> with a logical cpu. Provide an arm64 helper to do this.
> 
> Signed-off-by: Jeremy Linton <jeremy.linton@arm.com>
> Tested-by: Ard Biesheuvel <ard.biesheuvel@linaro.org>
> Tested-by: Vijaya Kumar K <vkilari@codeaurora.org>
> Tested-by: Xiongfeng Wang <wangxiongfeng2@huawei.com>
> Tested-by: Tomasz Nowicki <Tomasz.Nowicki@cavium.com>
> Acked-by: Ard Biesheuvel <ard.biesheuvel@linaro.org>

Acked-by: Sudeep Holla <sudeep.holla@arm.com>
diff mbox

Patch

diff --git a/arch/arm64/include/asm/acpi.h b/arch/arm64/include/asm/acpi.h
index 32f465a80e4e..0db62a4cbce2 100644
--- 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);