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authorDaniel Baumann <daniel.baumann@progress-linux.org>2024-04-07 18:49:45 +0000
committerDaniel Baumann <daniel.baumann@progress-linux.org>2024-04-07 18:49:45 +0000
commit2c3c1048746a4622d8c89a29670120dc8fab93c4 (patch)
tree848558de17fb3008cdf4d861b01ac7781903ce39 /arch/riscv/kernel/cpu_ops.c
parentInitial commit. (diff)
downloadlinux-2c3c1048746a4622d8c89a29670120dc8fab93c4.tar.xz
linux-2c3c1048746a4622d8c89a29670120dc8fab93c4.zip
Adding upstream version 6.1.76.upstream/6.1.76
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to 'arch/riscv/kernel/cpu_ops.c')
-rw-r--r--arch/riscv/kernel/cpu_ops.c37
1 files changed, 37 insertions, 0 deletions
diff --git a/arch/riscv/kernel/cpu_ops.c b/arch/riscv/kernel/cpu_ops.c
new file mode 100644
index 000000000..eb479a88a
--- /dev/null
+++ b/arch/riscv/kernel/cpu_ops.c
@@ -0,0 +1,37 @@
+// SPDX-License-Identifier: GPL-2.0-only
+/*
+ * Copyright (c) 2020 Western Digital Corporation or its affiliates.
+ */
+
+#include <linux/errno.h>
+#include <linux/mm.h>
+#include <linux/of.h>
+#include <linux/string.h>
+#include <linux/sched.h>
+#include <asm/cpu_ops.h>
+#include <asm/cpu_ops_sbi.h>
+#include <asm/sbi.h>
+#include <asm/smp.h>
+
+const struct cpu_operations *cpu_ops[NR_CPUS] __ro_after_init;
+
+extern const struct cpu_operations cpu_ops_sbi;
+#ifndef CONFIG_RISCV_BOOT_SPINWAIT
+const struct cpu_operations cpu_ops_spinwait = {
+ .name = "",
+ .cpu_prepare = NULL,
+ .cpu_start = NULL,
+};
+#endif
+
+void __init cpu_set_ops(int cpuid)
+{
+#if IS_ENABLED(CONFIG_RISCV_SBI)
+ if (sbi_probe_extension(SBI_EXT_HSM)) {
+ if (!cpuid)
+ pr_info("SBI HSM extension detected\n");
+ cpu_ops[cpuid] = &cpu_ops_sbi;
+ } else
+#endif
+ cpu_ops[cpuid] = &cpu_ops_spinwait;
+}