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-rw-r--r--arch/parisc/Kconfig3
-rw-r--r--arch/parisc/include/asm/perf_event.h8
-rw-r--r--arch/parisc/include/uapi/asm/perf_regs.h63
-rw-r--r--arch/parisc/kernel/Makefile1
-rw-r--r--arch/parisc/kernel/perf_event.c27
-rw-r--r--arch/parisc/kernel/perf_regs.c61
6 files changed, 162 insertions, 1 deletions
diff --git a/arch/parisc/Kconfig b/arch/parisc/Kconfig
index 2efa4b08b7b8..7abc5f16c280 100644
--- a/arch/parisc/Kconfig
+++ b/arch/parisc/Kconfig
@@ -31,6 +31,9 @@ config PARISC
select HAVE_KERNEL_UNCOMPRESSED
select HAVE_PCI
select HAVE_PERF_EVENTS
+ select HAVE_PERF_REGS
+ select HAVE_PERF_USER_STACK_DUMP
+ select PERF_USE_VMALLOC
select HAVE_KERNEL_BZIP2
select HAVE_KERNEL_GZIP
select HAVE_KERNEL_LZ4
diff --git a/arch/parisc/include/asm/perf_event.h b/arch/parisc/include/asm/perf_event.h
index 1e0fd8ba6c03..8a2925029d15 100644
--- a/arch/parisc/include/asm/perf_event.h
+++ b/arch/parisc/include/asm/perf_event.h
@@ -1,6 +1,12 @@
#ifndef __ASM_PARISC_PERF_EVENT_H
#define __ASM_PARISC_PERF_EVENT_H
-/* Empty, just to avoid compiling error */
+#include <asm/psw.h>
+
+#define perf_arch_fetch_caller_regs(regs, __ip) { \
+ (regs)->gr[0] = KERNEL_PSW; \
+ (regs)->iaoq[0] = (__ip); \
+ asm volatile("copy %%sp, %0\n":"=r"((regs)->gr[30])); \
+}
#endif /* __ASM_PARISC_PERF_EVENT_H */
diff --git a/arch/parisc/include/uapi/asm/perf_regs.h b/arch/parisc/include/uapi/asm/perf_regs.h
new file mode 100644
index 000000000000..1ae687bb3d3c
--- /dev/null
+++ b/arch/parisc/include/uapi/asm/perf_regs.h
@@ -0,0 +1,63 @@
+/* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */
+#ifndef _UAPI_ASM_PARISC_PERF_REGS_H
+#define _UAPI_ASM_PARISC_PERF_REGS_H
+
+/* see struct user_regs_struct */
+enum perf_event_parisc_regs {
+ PERF_REG_PARISC_R0, /* PSW is in gr[0] */
+ PERF_REG_PARISC_R1,
+ PERF_REG_PARISC_R2,
+ PERF_REG_PARISC_R3,
+ PERF_REG_PARISC_R4,
+ PERF_REG_PARISC_R5,
+ PERF_REG_PARISC_R6,
+ PERF_REG_PARISC_R7,
+ PERF_REG_PARISC_R8,
+ PERF_REG_PARISC_R9,
+ PERF_REG_PARISC_R10,
+ PERF_REG_PARISC_R11,
+ PERF_REG_PARISC_R12,
+ PERF_REG_PARISC_R13,
+ PERF_REG_PARISC_R14,
+ PERF_REG_PARISC_R15,
+ PERF_REG_PARISC_R16,
+ PERF_REG_PARISC_R17,
+ PERF_REG_PARISC_R18,
+ PERF_REG_PARISC_R19,
+ PERF_REG_PARISC_R20,
+ PERF_REG_PARISC_R21,
+ PERF_REG_PARISC_R22,
+ PERF_REG_PARISC_R23,
+ PERF_REG_PARISC_R24,
+ PERF_REG_PARISC_R25,
+ PERF_REG_PARISC_R26,
+ PERF_REG_PARISC_R27,
+ PERF_REG_PARISC_R28,
+ PERF_REG_PARISC_R29,
+ PERF_REG_PARISC_R30,
+ PERF_REG_PARISC_R31,
+
+ PERF_REG_PARISC_SR0,
+ PERF_REG_PARISC_SR1,
+ PERF_REG_PARISC_SR2,
+ PERF_REG_PARISC_SR3,
+ PERF_REG_PARISC_SR4,
+ PERF_REG_PARISC_SR5,
+ PERF_REG_PARISC_SR6,
+ PERF_REG_PARISC_SR7,
+
+ PERF_REG_PARISC_IAOQ0,
+ PERF_REG_PARISC_IAOQ1,
+ PERF_REG_PARISC_IASQ0,
+ PERF_REG_PARISC_IASQ1,
+
+ PERF_REG_PARISC_SAR, /* CR11 */
+ PERF_REG_PARISC_IIR, /* CR19 */
+ PERF_REG_PARISC_ISR, /* CR20 */
+ PERF_REG_PARISC_IOR, /* CR21 */
+ PERF_REG_PARISC_IPSW, /* CR22 */
+
+ PERF_REG_PARISC_MAX
+};
+
+#endif /* _UAPI_ASM_PARISC_PERF_REGS_H */
diff --git a/arch/parisc/kernel/Makefile b/arch/parisc/kernel/Makefile
index d5055ba33722..9157bc8bdf41 100644
--- a/arch/parisc/kernel/Makefile
+++ b/arch/parisc/kernel/Makefile
@@ -38,6 +38,7 @@ obj-$(CONFIG_GENERIC_ARCH_TOPOLOGY) += topology.o
obj-$(CONFIG_FUNCTION_TRACER) += ftrace.o
obj-$(CONFIG_FUNCTION_GRAPH_TRACER) += ftrace.o
obj-$(CONFIG_JUMP_LABEL) += jump_label.o
+obj-$(CONFIG_PERF_EVENTS) += perf_event.o perf_regs.o
obj-$(CONFIG_KGDB) += kgdb.o
obj-$(CONFIG_KPROBES) += kprobes.o
obj-$(CONFIG_KEXEC_CORE) += kexec.o relocate_kernel.o
diff --git a/arch/parisc/kernel/perf_event.c b/arch/parisc/kernel/perf_event.c
new file mode 100644
index 000000000000..f90b83886ab4
--- /dev/null
+++ b/arch/parisc/kernel/perf_event.c
@@ -0,0 +1,27 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * Performance event support for parisc
+ *
+ * Copyright (C) 2025 by Helge Deller <deller@gmx.de>
+ */
+
+#include <linux/kernel.h>
+#include <linux/perf_event.h>
+#include <asm/unwind.h>
+
+void perf_callchain_kernel(struct perf_callchain_entry_ctx *entry,
+ struct pt_regs *regs)
+{
+
+ struct unwind_frame_info info;
+
+ unwind_frame_init_task(&info, current, NULL);
+ while (1) {
+ if (unwind_once(&info) < 0 || info.ip == 0)
+ break;
+
+ if (!__kernel_text_address(info.ip) ||
+ perf_callchain_store(entry, info.ip))
+ return;
+ }
+}
diff --git a/arch/parisc/kernel/perf_regs.c b/arch/parisc/kernel/perf_regs.c
new file mode 100644
index 000000000000..68458e2f6197
--- /dev/null
+++ b/arch/parisc/kernel/perf_regs.c
@@ -0,0 +1,61 @@
+// 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);
+}
generated by cgit (git 2.34.1) at 2025-10-13 16:10:57 +0000