Merge tag 'i3c/for-7.3' of git://git.kernel.org/pub/scm/linux/kernel/git/i3c/linuxgrafted

Pull I3C updates from Alexandre Belloni:
 "A new driver this cycle, for the AMD AXI I3C controller.

  There are also new features such as IBI wakeup support, SETAASA device
  discovery and ACPI support for the the DAA methods, meaning we can now
  communicate with the SPD devices on DDR5 modules.

  New driver:
   - AMD AXI I3C master controller

  Subsystem:
   - I3C Common Command Code (CCC) handling improvements, especially
     around GET CCCs
   - SETAASA device discovery support
   - ACPI support for all existing DAA methods like SETDASA, SETNEWDA as
     well as I2C devices on I3C bus
   - IBI-based wakeup support

  Drivers:
   - dw: SETAASA support
   - mipi-i3c-hci: advertise IBI wakeup capability, AMD_PT I3C
     controller support, PIO queue management support for HCI v1.2
   - renesas: improve suspend to RAM support, add runtime PM support"

* tag 'i3c/for-7.3' of git://git.kernel.org/pub/scm/linux/kernel/git/i3c/linux: (70 commits)
  i3c: dw: reduce do_daa time if there's no client
  i3c: mipi-i3c-hci: Add support for AMD_PT I3C controller
  i3c: mipi-i3c-hci: Add PIO queue management support for HCI v1.2
  i3c: mipi-i3c-hci: Fix missing STAT_IBI_STATUS_THLD in PIO mode
  i3c: dw: rename "pclk" to "apb" to match dt-binding
  i3c: dw: make struct dw_i3c_cmd smaller
  i3c: dw: use COMMAND_PORT_TRANSFER_ARG instead of hardcoding
  i3c: renesas: Don't register devices when ENTDAA times out
  i3c: master: dw-i3c-master: fix OD timing for first broadcast
  i3c: mipi-i3c-hci: Advertise IBI wakeup capability
  i3c: mipi-i3c-hci: Factor out i3c_hci_sysdev()
  i3c: mipi-i3c-hci-pci: Propagate I3C wakeup requirements to PCI
  i3c: master: Reject IBI requests from non-IBI-capable devices
  i3c: master: Add helper to query bus wakeup requirements
  i3c: master: Report wakeup events for IBIs
  i3c: master: Support IBI-based wakeup capability
  i3c: master: Fix potential UAF in i3c_device_match()
  i3c: master: Fix potential UAF in i3c_device_uevent()
  i3c: Make dev->desc locking assumptions explicit
  i3c: master: Fix use-after-free of master->this
  ...

1 files changed, 237 insertions, 0 deletions

diff --git a/tools/perf/util/dwarf-regs.c b/tools/perf/util/dwarf-regs.c
new file mode 100644
index 000000000..797f455eb
--- /dev/null
+++ b/tools/perf/util/dwarf-regs.c
@@ -0,0 +1,237 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * dwarf-regs.c : Mapping of DWARF debug register numbers into register names.
+ *
+ * Written by: Masami Hiramatsu <mhiramat@kernel.org>
+ */
+
+#include <stdlib.h>
+#include <string.h>
+#include <debug.h>
+#include <dwarf-regs.h>
+#include <elf.h>
+#include <errno.h>
+#include <linux/kernel.h>
+
+/* Define const char * {arch}_register_tbl[] */
+#define DEFINE_DWARF_REGSTR_TABLE
+#include "../arch/x86/include/dwarf-regs-table.h"
+#include "../arch/arm/include/dwarf-regs-table.h"
+#include "../arch/arm64/include/dwarf-regs-table.h"
+#include "../arch/sh/include/dwarf-regs-table.h"
+#include "../arch/powerpc/include/dwarf-regs-table.h"
+#include "../arch/riscv/include/dwarf-regs-table.h"
+#include "../arch/s390/include/dwarf-regs-table.h"
+#include "../arch/sparc/include/dwarf-regs-table.h"
+#include "../arch/xtensa/include/dwarf-regs-table.h"
+#include "../arch/mips/include/dwarf-regs-table.h"
+#include "../arch/loongarch/include/dwarf-regs-table.h"
+
+/* Return architecture dependent register string (for kprobe-tracer) */
+const char *get_dwarf_regstr(unsigned int n, unsigned int machine, unsigned int flags)
+{
+	#define __get_dwarf_regstr(tbl, n) (((n) < ARRAY_SIZE(tbl)) ? (tbl)[(n)] : NULL)
+
+	if (machine == EM_NONE) {
+		/* Generic arch - use host arch */
+		machine = EM_HOST;
+	}
+	switch (machine) {
+	case EM_386:
+		return __get_dwarf_regstr(x86_32_regstr_tbl, n);
+	case EM_X86_64:
+		return __get_dwarf_regstr(x86_64_regstr_tbl, n);
+	case EM_ARM:
+		return __get_dwarf_regstr(arm_regstr_tbl, n);
+	case EM_AARCH64:
+		return __get_dwarf_regstr(aarch64_regstr_tbl, n);
+	case EM_CSKY:
+		return __get_csky_regstr(n, flags);
+	case EM_SH:
+		return __get_dwarf_regstr(sh_regstr_tbl, n);
+	case EM_S390:
+		return __get_dwarf_regstr(s390_regstr_tbl, n);
+	case EM_PPC:
+	case EM_PPC64:
+		return __get_dwarf_regstr(powerpc_regstr_tbl, n);
+	case EM_RISCV:
+		return __get_dwarf_regstr(riscv_regstr_tbl, n);
+	case EM_SPARC:
+	case EM_SPARCV9:
+		return __get_dwarf_regstr(sparc_regstr_tbl, n);
+	case EM_XTENSA:
+		return __get_dwarf_regstr(xtensa_regstr_tbl, n);
+	case EM_MIPS:
+		return __get_dwarf_regstr(mips_regstr_tbl, n);
+	case EM_LOONGARCH:
+		return __get_dwarf_regstr(loongarch_regstr_tbl, n);
+	default:
+		pr_err("ELF MACHINE %x is not supported.\n", machine);
+	}
+	return NULL;
+
+	#undef __get_dwarf_regstr
+}
+
+static int __get_dwarf_regnum(const char *const *regstr, size_t num_regstr, const char *name)
+{
+	for (size_t i = 0; i < num_regstr; i++) {
+		if (regstr[i] && !strcmp(regstr[i], name))
+			return i;
+	}
+	return -ENOENT;
+}
+
+/* Return DWARF register number from architecture register name */
+int get_dwarf_regnum(const char *name, unsigned int machine, unsigned int flags)
+{
+	char *regname = strdup(name);
+	int reg = -1;
+	char *p;
+
+	#define _get_dwarf_regnum(tbl, name) __get_dwarf_regnum(tbl, ARRAY_SIZE(tbl), name)
+
+	if (regname == NULL)
+		return -EINVAL;
+
+	/* For convenience, remove trailing characters */
+	p = strpbrk(regname, " ,)");
+	if (p)
+		*p = '\0';
+
+	if (machine == EM_NONE) {
+		/* Generic arch - use host arch */
+		machine = EM_HOST;
+	}
+	switch (machine) {
+	case EM_X86_64:
+		reg = __get_dwarf_regnum_x86_64(name);
+		break;
+	case EM_386:
+		reg = __get_dwarf_regnum_i386(name);
+		break;
+	case EM_ARM:
+		reg = _get_dwarf_regnum(arm_regstr_tbl, name);
+		break;
+	case EM_AARCH64:
+		reg = _get_dwarf_regnum(aarch64_regstr_tbl, name);
+		break;
+	case EM_CSKY:
+		reg = __get_csky_regnum(name, flags);
+		break;
+	case EM_SH:
+		reg = _get_dwarf_regnum(sh_regstr_tbl, name);
+		break;
+	case EM_S390:
+		reg = _get_dwarf_regnum(s390_regstr_tbl, name);
+		break;
+	case EM_PPC:
+	case EM_PPC64:
+		reg = _get_dwarf_regnum(powerpc_regstr_tbl, name);
+		break;
+	case EM_RISCV:
+		reg = _get_dwarf_regnum(riscv_regstr_tbl, name);
+		break;
+	case EM_SPARC:
+	case EM_SPARCV9:
+		reg = _get_dwarf_regnum(sparc_regstr_tbl, name);
+		break;
+	case EM_XTENSA:
+		reg = _get_dwarf_regnum(xtensa_regstr_tbl, name);
+		break;
+	case EM_MIPS:
+		reg = _get_dwarf_regnum(mips_regstr_tbl, name);
+		break;
+	case EM_LOONGARCH:
+		reg = _get_dwarf_regnum(loongarch_regstr_tbl, name);
+		break;
+	default:
+		pr_err("ELF MACHINE %x is not supported.\n", machine);
+	}
+	free(regname);
+	return reg;
+
+	#undef _get_dwarf_regnum
+}
+
+static int get_libdw_frame_nregs(unsigned int machine, unsigned int flags __maybe_unused)
+{
+	switch (machine) {
+	case EM_X86_64:
+		return 17;
+	case EM_386:
+		return 9;
+	case EM_ARM:
+		return 16;
+	case EM_AARCH64:
+		return 97;
+	case EM_CSKY:
+		return 38;
+	case EM_S390:
+		return 32;
+	case EM_PPC:
+	case EM_PPC64:
+		return 145;
+	case EM_RISCV:
+		return 66;
+	case EM_SPARC:
+	case EM_SPARCV9:
+		return 103;
+	case EM_LOONGARCH:
+		return 74;
+	case EM_MIPS:
+		return 71;
+	default:
+		return 0;
+	}
+}
+
+int get_dwarf_regnum_for_perf_regnum(int perf_regnum, unsigned int machine,
+				     unsigned int flags, bool only_libdw_supported)
+{
+	int reg;
+
+	switch (machine) {
+	case EM_X86_64:
+		reg = __get_dwarf_regnum_for_perf_regnum_x86_64(perf_regnum);
+		break;
+	case EM_386:
+		reg = __get_dwarf_regnum_for_perf_regnum_i386(perf_regnum);
+		break;
+	case EM_ARM:
+		reg = __get_dwarf_regnum_for_perf_regnum_arm(perf_regnum);
+		break;
+	case EM_AARCH64:
+		reg = __get_dwarf_regnum_for_perf_regnum_arm64(perf_regnum);
+		break;
+	case EM_CSKY:
+		reg = __get_dwarf_regnum_for_perf_regnum_csky(perf_regnum, flags);
+		break;
+	case EM_PPC:
+	case EM_PPC64:
+		reg = __get_dwarf_regnum_for_perf_regnum_powerpc(perf_regnum);
+		break;
+	case EM_RISCV:
+		reg = __get_dwarf_regnum_for_perf_regnum_riscv(perf_regnum);
+		break;
+	case EM_S390:
+		reg = __get_dwarf_regnum_for_perf_regnum_s390(perf_regnum);
+		break;
+	case EM_LOONGARCH:
+		reg = __get_dwarf_regnum_for_perf_regnum_loongarch(perf_regnum);
+		break;
+	case EM_MIPS:
+		reg = __get_dwarf_regnum_for_perf_regnum_mips(perf_regnum);
+		break;
+	default:
+		pr_err("ELF MACHINE %x is not supported.\n", machine);
+		return -ENOENT;
+	}
+	if (reg >= 0 && only_libdw_supported) {
+		int nregs = get_libdw_frame_nregs(machine, flags);
+
+		if (reg >= nregs)
+			reg = -ENOENT;
+	}
+	return reg;
+}