Contributors: 12
| Author |
Tokens |
Token Proportion |
Commits |
Commit Proportion |
| JiSheng Zhang |
134 |
28.09% |
3 |
12.00% |
| Conor Dooley |
89 |
18.66% |
5 |
20.00% |
| Andrew Jones |
68 |
14.26% |
2 |
8.00% |
| Anup Patel |
61 |
12.79% |
2 |
8.00% |
| Clément Leger |
54 |
11.32% |
1 |
4.00% |
| Evan Green |
35 |
7.34% |
3 |
12.00% |
| Atish Patra |
12 |
2.52% |
3 |
12.00% |
| Palmer Dabbelt |
8 |
1.68% |
2 |
8.00% |
| Andy Chiu |
7 |
1.47% |
1 |
4.00% |
| Greentime Hu |
4 |
0.84% |
1 |
4.00% |
| Dao Lu |
3 |
0.63% |
1 |
4.00% |
| Mayuresh Chitale |
2 |
0.42% |
1 |
4.00% |
| Total |
477 |
|
25 |
|
/* SPDX-License-Identifier: GPL-2.0-only */
/*
* Copyright 2022-2023 Rivos, Inc
*/
#ifndef _ASM_CPUFEATURE_H
#define _ASM_CPUFEATURE_H
#include <linux/bitmap.h>
#include <linux/jump_label.h>
#include <asm/hwcap.h>
#include <asm/alternative-macros.h>
#include <asm/errno.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;
};
struct riscv_isainfo {
DECLARE_BITMAP(isa, RISCV_ISA_EXT_MAX);
};
DECLARE_PER_CPU(struct riscv_cpuinfo, riscv_cpuinfo);
DECLARE_PER_CPU(long, misaligned_access_speed);
/* Per-cpu ISA extensions. */
extern struct riscv_isainfo hart_isa[NR_CPUS];
void riscv_user_isa_enable(void);
#ifdef CONFIG_RISCV_MISALIGNED
bool unaligned_ctl_available(void);
bool check_unaligned_access_emulated(int cpu);
void unaligned_emulation_finish(void);
#else
static inline bool unaligned_ctl_available(void)
{
return false;
}
static inline bool check_unaligned_access_emulated(int cpu)
{
return false;
}
static inline void unaligned_emulation_finish(void) {}
#endif
unsigned long riscv_get_elf_hwcap(void);
struct riscv_isa_ext_data {
const unsigned int id;
const char *name;
const char *property;
};
extern const struct riscv_isa_ext_data riscv_isa_ext[];
extern const size_t riscv_isa_ext_count;
extern bool riscv_isa_fallback;
unsigned long riscv_isa_extension_base(const unsigned long *isa_bitmap);
bool __riscv_isa_extension_available(const unsigned long *isa_bitmap, int bit);
#define riscv_isa_extension_available(isa_bitmap, ext) \
__riscv_isa_extension_available(isa_bitmap, RISCV_ISA_EXT_##ext)
static __always_inline bool
riscv_has_extension_likely(const unsigned long ext)
{
compiletime_assert(ext < RISCV_ISA_EXT_MAX,
"ext must be < RISCV_ISA_EXT_MAX");
if (IS_ENABLED(CONFIG_RISCV_ALTERNATIVE)) {
asm_volatile_goto(
ALTERNATIVE("j %l[l_no]", "nop", 0, %[ext], 1)
:
: [ext] "i" (ext)
:
: l_no);
} else {
if (!__riscv_isa_extension_available(NULL, ext))
goto l_no;
}
return true;
l_no:
return false;
}
static __always_inline bool
riscv_has_extension_unlikely(const unsigned long ext)
{
compiletime_assert(ext < RISCV_ISA_EXT_MAX,
"ext must be < RISCV_ISA_EXT_MAX");
if (IS_ENABLED(CONFIG_RISCV_ALTERNATIVE)) {
asm_volatile_goto(
ALTERNATIVE("nop", "j %l[l_yes]", 0, %[ext], 1)
:
: [ext] "i" (ext)
:
: l_yes);
} else {
if (__riscv_isa_extension_available(NULL, ext))
goto l_yes;
}
return false;
l_yes:
return true;
}
static __always_inline bool riscv_cpu_has_extension_likely(int cpu, const unsigned long ext)
{
if (IS_ENABLED(CONFIG_RISCV_ALTERNATIVE) && riscv_has_extension_likely(ext))
return true;
return __riscv_isa_extension_available(hart_isa[cpu].isa, ext);
}
static __always_inline bool riscv_cpu_has_extension_unlikely(int cpu, const unsigned long ext)
{
if (IS_ENABLED(CONFIG_RISCV_ALTERNATIVE) && riscv_has_extension_unlikely(ext))
return true;
return __riscv_isa_extension_available(hart_isa[cpu].isa, ext);
}
#endif