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// SPDX-License-Identifier: GPL-2.0
/*
* Copyright (C) 2022 Loongson Technology Corporation Limited
*
* Derived from MIPS:
* Copyright (C) 2013 Cavium, Inc.
*/
#include <linux/perf_event.h>
#include <asm/ptrace.h>
#ifdef CONFIG_32BIT
u64 perf_reg_abi(struct task_struct *tsk)
{
return PERF_SAMPLE_REGS_ABI_32;
}
#else /* Must be CONFIG_64BIT */
u64 perf_reg_abi(struct task_struct *tsk)
{
if (test_tsk_thread_flag(tsk, TIF_32BIT_REGS))
return PERF_SAMPLE_REGS_ABI_32;
else
return PERF_SAMPLE_REGS_ABI_64;
}
#endif /* CONFIG_32BIT */
int perf_reg_validate(u64 mask)
{
if (!mask)
return -EINVAL;
if (mask & ~((1ull << PERF_REG_LOONGARCH_MAX) - 1))
return -EINVAL;
return 0;
}
u64 perf_reg_value(struct pt_regs *regs, int idx)
{
if (WARN_ON_ONCE((u32)idx >= PERF_REG_LOONGARCH_MAX))
return 0;
if ((u32)idx == PERF_REG_LOONGARCH_PC)
return regs->csr_era;
return regs->regs[idx];
}
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);
}
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