In preparation for tracking and exposing microarchitectural details to
userspace (like whether or not unaligned accesses are fast), move the
riscv_cpuinfo struct out to its own new cpufeatures.h header. It will
need to be used by more than just cpu.c.
Signed-off-by: Evan Green <evan@rivosinc.com>
Reviewed-by: Conor Dooley <conor.dooley@microchip.com>
Reviewed-by: Heiko Stuebner <heiko.stuebner@vrull.eu>
Tested-by: Heiko Stuebner <heiko.stuebner@vrull.eu>
Reviewed-by: Paul Walmsley <paul.walmsley@sifive.com>
Link: https://lore.kernel.org/r/20230407231103.2622178-2-evan@rivosinc.com
Signed-off-by: Palmer Dabbelt <palmer@rivosinc.com>
--- /dev/null
+/* SPDX-License-Identifier: GPL-2.0-only */
+/*
+ * Copyright 2022-2023 Rivos, Inc
+ */
+
+#ifndef _ASM_CPUFEATURE_H
+#define _ASM_CPUFEATURE_H
+
+/*
+ * These are probed via a device_initcall(), via either the SBI or directly
+ * from the corresponding CSRs.
+ */
+struct riscv_cpuinfo {
+ unsigned long mvendorid;
+ unsigned long marchid;
+ unsigned long mimpid;
+};
+
+DECLARE_PER_CPU(struct riscv_cpuinfo, riscv_cpuinfo);
+
+#endif
#include <linux/init.h>
#include <linux/seq_file.h>
#include <linux/of.h>
+#include <asm/cpufeature.h>
#include <asm/csr.h>
#include <asm/hwcap.h>
#include <asm/sbi.h>
return -1;
}
-struct riscv_cpuinfo {
- unsigned long mvendorid;
- unsigned long marchid;
- unsigned long mimpid;
-};
-static DEFINE_PER_CPU(struct riscv_cpuinfo, riscv_cpuinfo);
+DEFINE_PER_CPU(struct riscv_cpuinfo, riscv_cpuinfo);
unsigned long riscv_cached_mvendorid(unsigned int cpu_id)
{