linux-kernel - [PATCH RFC v4 09/15] arm64: acpi: Move get_cpu_for_acpi

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Date: Wed, 31 Jan 2024 16:50:22 +0000
From: Russell King (Oracle) <rmk+kernel@...linux.org.uk>
To: linux-pm@...r.kernel.org,
	 loongarch@...ts.linux.dev,
	 linux-acpi@...r.kernel.org,
	 linux-arch@...r.kernel.org,
	 linux-kernel@...r.kernel.org,
	 linux-arm-kernel@...ts.infradead.org,
	 linux-riscv@...ts.infradead.org,
	 kvmarm@...ts.linux.dev,
	 x86@...nel.org,
	 acpica-devel@...ts.linuxfoundation.org,
	 linux-csky@...r.kernel.org,
	 linux-doc@...r.kernel.org,
	 linux-ia64@...r.kernel.org,
	 linux-parisc@...r.kernel.org
Cc: Salil Mehta <salil.mehta@...wei.com>,
	 Jean-Philippe Brucker <jean-philippe@...aro.org>,
	 jianyong.wu@....com,
	 justin.he@....com,
	 James Morse <james.morse@....com>,
	 Jonathan Cameron <Jonathan.Cameron@...wei.com>,
	 "Rafael J. Wysocki" <rafael@...nel.org>
Subject: [PATCH RFC v4 09/15] arm64: acpi: Move get_cpu_for_acpi_id() to a
 header

From: James Morse <james.morse@....com>

ACPI identifies CPUs by UID. get_cpu_for_acpi_id() maps the ACPI UID
to the linux CPU number.

The helper to retrieve this mapping is only available in arm64's numa
code.

Move it to live next to get_acpi_id_for_cpu().

Signed-off-by: James Morse <james.morse@....com>
Reviewed-by: Jonathan Cameron <Jonathan.Cameron@...wei.com>
Reviewed-by: Gavin Shan <gshan@...hat.com>
Tested-by: Miguel Luis <miguel.luis@...cle.com>
Tested-by: Vishnu Pajjuri <vishnu@...amperecomputing.com>
Tested-by: Jianyong Wu <jianyong.wu@....com>
Signed-off-by: Russell King (Oracle) <rmk+kernel@...linux.org.uk>
---
 arch/arm64/include/asm/acpi.h | 11 +++++++++++
 arch/arm64/kernel/acpi_numa.c | 11 -----------
 2 files changed, 11 insertions(+), 11 deletions(-)

diff --git a/arch/arm64/include/asm/acpi.h b/arch/arm64/include/asm/acpi.h
index 6792a1f83f2a..bc9a6656fc0c 100644
--- a/arch/arm64/include/asm/acpi.h
+++ b/arch/arm64/include/asm/acpi.h
@@ -119,6 +119,17 @@ static inline u32 get_acpi_id_for_cpu(unsigned int cpu)
 	return	acpi_cpu_get_madt_gicc(cpu)->uid;
 }
 
+static inline int get_cpu_for_acpi_id(u32 uid)
+{
+	int cpu;
+
+	for (cpu = 0; cpu < nr_cpu_ids; cpu++)
+		if (uid == get_acpi_id_for_cpu(cpu))
+			return cpu;
+
+	return -EINVAL;
+}
+
 static inline void arch_fix_phys_package_id(int num, u32 slot) { }
 void __init acpi_init_cpus(void);
 int apei_claim_sea(struct pt_regs *regs);
diff --git a/arch/arm64/kernel/acpi_numa.c b/arch/arm64/kernel/acpi_numa.c
index e51535a5f939..0c036a9a3c33 100644
--- a/arch/arm64/kernel/acpi_numa.c
+++ b/arch/arm64/kernel/acpi_numa.c
@@ -34,17 +34,6 @@ int __init acpi_numa_get_nid(unsigned int cpu)
 	return acpi_early_node_map[cpu];
 }
 
-static inline int get_cpu_for_acpi_id(u32 uid)
-{
-	int cpu;
-
-	for (cpu = 0; cpu < nr_cpu_ids; cpu++)
-		if (uid == get_acpi_id_for_cpu(cpu))
-			return cpu;
-
-	return -EINVAL;
-}
-
 static int __init acpi_parse_gicc_pxm(union acpi_subtable_headers *header,
 				      const unsigned long end)
 {
-- 
2.30.2