linux-kernel - [PATCH v9 04/12] arm64/acpi: Create arch specific cpu to acpi id helper

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Date:   Fri, 11 May 2018 18:57:59 -0500
From:   Jeremy Linton <jeremy.linton@....com>
To:     linux-acpi@...r.kernel.org
Cc:     Sudeep.Holla@....com, linux-arm-kernel@...ts.infradead.org,
        Lorenzo.Pieralisi@....com, hanjun.guo@...aro.org,
        rjw@...ysocki.net, Will.Deacon@....com, Catalin.Marinas@....com,
        gregkh@...uxfoundation.org, Mark.Rutland@....com,
        linux-kernel@...r.kernel.org, linux-riscv@...ts.infradead.org,
        wangxiongfeng2@...wei.com, vkilari@...eaurora.org, ahs3@...hat.com,
        Dietmar.Eggemann@....com, Morten.Rasmussen@....com,
        palmer@...ive.com, lenb@...nel.org, john.garry@...wei.com,
        austinwc@...eaurora.org, tnowicki@...iumnetworks.com,
        jhugo@...eaurora.org, ard.biesheuvel@...aro.org,
        Jeremy Linton <jeremy.linton@....com>
Subject: [PATCH v9 04/12] arm64/acpi: Create arch specific cpu to acpi id helper

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@....com>
Tested-by: Ard Biesheuvel <ard.biesheuvel@...aro.org>
Tested-by: Vijaya Kumar K <vkilari@...eaurora.org>
Tested-by: Xiongfeng Wang <wangxiongfeng2@...wei.com>
Tested-by: Tomasz Nowicki <Tomasz.Nowicki@...ium.com>
Acked-by: Ard Biesheuvel <ard.biesheuvel@...aro.org>
---
 arch/arm64/include/asm/acpi.h | 4 ++++
 1 file changed, 4 insertions(+)

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);
-- 
2.13.6