linux-kernel - [PATCH 3/5] riscv: smp: Support for 64bit hartid

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Date:   Wed, 25 May 2022 20:41:04 +0530
From:   Sunil V L <sunilvl@...tanamicro.com>
To:     Paul Walmsley <paul.walmsley@...ive.com>,
        Palmer Dabbelt <palmer@...belt.com>,
        Albert Ou <aou@...s.berkeley.edu>,
        Daniel Lezcano <daniel.lezcano@...aro.org>,
        Thomas Gleixner <tglx@...utronix.de>,
        Ard Biesheuvel <ardb@...nel.org>,
        Marc Zyngier <maz@...nel.org>,
        Atish Patra <atishp@...osinc.com>,
        Heinrich Schuchardt <heinrich.schuchardt@...onical.com>,
        Anup Patel <apatel@...tanamicro.com>
Cc:     linux-riscv@...ts.infradead.org, linux-kernel@...r.kernel.org,
        linux-efi@...r.kernel.org, Sunil V L <sunil.vl@...il.com>,
        Sunil V L <sunilvl@...tanamicro.com>
Subject: [PATCH 3/5] riscv: smp: Support for 64bit hartid

The hartid can be a 64bit value on RV64 platforms. This patch
modifies the hartid parameter in riscv_hartid_to_cpuid() as
unsigned long so that it can hold 64bit value on RV64 platforms.

Signed-off-by: Sunil V L <sunilvl@...tanamicro.com>
---
 arch/riscv/include/asm/smp.h | 4 ++--
 arch/riscv/kernel/smp.c      | 4 ++--
 2 files changed, 4 insertions(+), 4 deletions(-)

diff --git a/arch/riscv/include/asm/smp.h b/arch/riscv/include/asm/smp.h
index 23170c933d73..d3443be7eedc 100644
--- a/arch/riscv/include/asm/smp.h
+++ b/arch/riscv/include/asm/smp.h
@@ -42,7 +42,7 @@ void arch_send_call_function_ipi_mask(struct cpumask *mask);
 /* Hook for the generic smp_call_function_single() routine. */
 void arch_send_call_function_single_ipi(int cpu);
 
-int riscv_hartid_to_cpuid(int hartid);
+int riscv_hartid_to_cpuid(unsigned long hartid);
 
 /* Set custom IPI operations */
 void riscv_set_ipi_ops(const struct riscv_ipi_ops *ops);
@@ -70,7 +70,7 @@ static inline void show_ipi_stats(struct seq_file *p, int prec)
 {
 }
 
-static inline int riscv_hartid_to_cpuid(int hartid)
+static inline int riscv_hartid_to_cpuid(unsigned long hartid)
 {
 	if (hartid == boot_cpu_hartid)
 		return 0;
diff --git a/arch/riscv/kernel/smp.c b/arch/riscv/kernel/smp.c
index b5d30ea92292..018e7dc45df6 100644
--- a/arch/riscv/kernel/smp.c
+++ b/arch/riscv/kernel/smp.c
@@ -47,7 +47,7 @@ static struct {
 	unsigned long bits ____cacheline_aligned;
 } ipi_data[NR_CPUS] __cacheline_aligned;
 
-int riscv_hartid_to_cpuid(int hartid)
+int riscv_hartid_to_cpuid(unsigned long hartid)
 {
 	int i;
 
@@ -55,7 +55,7 @@ int riscv_hartid_to_cpuid(int hartid)
 		if (cpuid_to_hartid_map(i) == hartid)
 			return i;
 
-	pr_err("Couldn't find cpu id for hartid [%d]\n", hartid);
+	pr_err("Couldn't find cpu id for hartid [%lu]\n", hartid);
 	return -ENOENT;
 }
 
-- 
2.25.1