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// SPDX-License-Identifier: GPL-2.0
/* Copyright (C) 2025 by Helge Deller <deller@gmx.de> */
#include <linux/perf_event.h>
#include <linux/perf_regs.h>
#include <asm/ptrace.h>
u64 perf_reg_value(struct pt_regs *regs, int idx)
{
switch (idx) {
case PERF_REG_PARISC_R0 ... PERF_REG_PARISC_R31:
return regs->gr[idx - PERF_REG_PARISC_R0];
case PERF_REG_PARISC_SR0 ... PERF_REG_PARISC_SR7:
return regs->sr[idx - PERF_REG_PARISC_SR0];
case PERF_REG_PARISC_IASQ0 ... PERF_REG_PARISC_IASQ1:
return regs->iasq[idx - PERF_REG_PARISC_IASQ0];
case PERF_REG_PARISC_IAOQ0 ... PERF_REG_PARISC_IAOQ1:
return regs->iasq[idx - PERF_REG_PARISC_IAOQ0];
case PERF_REG_PARISC_SAR: /* CR11 */
return regs->sar;
case PERF_REG_PARISC_IIR: /* CR19 */
return regs->iir;
case PERF_REG_PARISC_ISR: /* CR20 */
return regs->isr;
case PERF_REG_PARISC_IOR: /* CR21 */
return regs->ior;
case PERF_REG_PARISC_IPSW: /* CR22 */
return regs->ipsw;
};
WARN_ON_ONCE((u32)idx >= PERF_REG_PARISC_MAX);
return 0;
}
#define REG_RESERVED (~((1ULL << PERF_REG_PARISC_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)
{
if (!IS_ENABLED(CONFIG_64BIT))
return PERF_SAMPLE_REGS_ABI_32;
if (test_tsk_thread_flag(task, TIF_32BIT))
return PERF_SAMPLE_REGS_ABI_32;
return PERF_SAMPLE_REGS_ABI_64;
}
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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