diff options
Diffstat (limited to 'arch/csky/kernel/perf_regs.c')
-rw-r--r-- | arch/csky/kernel/perf_regs.c | 39 |
1 files changed, 39 insertions, 0 deletions
diff --git a/arch/csky/kernel/perf_regs.c b/arch/csky/kernel/perf_regs.c new file mode 100644 index 0000000000..09b7f88a2d --- /dev/null +++ b/arch/csky/kernel/perf_regs.c @@ -0,0 +1,39 @@ +// SPDX-License-Identifier: GPL-2.0 +// Copyright (C) 2019 Hangzhou C-SKY Microsystems co.,ltd. + +#include <linux/errno.h> +#include <linux/kernel.h> +#include <linux/perf_event.h> +#include <linux/bug.h> +#include <asm/perf_regs.h> +#include <asm/ptrace.h> + +u64 perf_reg_value(struct pt_regs *regs, int idx) +{ + if (WARN_ON_ONCE((u32)idx >= PERF_REG_CSKY_MAX)) + return 0; + + return (u64)*((u32 *)regs + idx); +} + +#define REG_RESERVED (~((1ULL << PERF_REG_CSKY_MAX) - 1)) + +int perf_reg_validate(u64 mask) +{ + if (!mask || mask & REG_RESERVED) + return -EINVAL; + + return 0; +} + +u64 perf_reg_abi(struct task_struct *task) +{ + return PERF_SAMPLE_REGS_ABI_32; +} + +void perf_get_regs_user(struct perf_regs *regs_user, + struct pt_regs *regs) +{ + regs_user->regs = task_pt_regs(current); + regs_user->abi = perf_reg_abi(current); +} |