Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/s390/linux

Pull second round of s390 updates from Martin Schwidefsky:

 - rework of the vdso code to avoid the use of the access register mode

 - use perf AUX buffers for the transport of diagnostic sample data

 - add perf_regs and user stack dump support

 - enable perf call graphs for user space programs

 - add perf register support for floating-point registers

 - all remaining s390 related timer_setup conversions

 - bug fixes and cleanups

* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/s390/linux: (30 commits)
  s390: remove unused parameter from Makefile
  zfcp: purely mechanical update using timer API, plus blank lines
  s390/scsi: Convert timers to use timer_setup()
  s390/cpum_sf: correctly set the PID and TID in perf samples
  s390/cpum_sf: load program parameter at sampler enablement
  s390/perf: add perf register support for floating-point registers
  s390/perf: extend perf_regs support to include floating-point registers
  s390/perf: define common DWARF register string table
  s390/perf: add support for perf_regs and libdw
  s390/perf: add perf_regs support and user stack dump
  s390/cpum_sf: do not register PMU if no sampling mode is authorized
  s390/cpumf: remove raw event support in basic-only sampling mode
  s390/perf: add callback to perf to enable using AUX buffer
  s390/cpumf: enable using AUX buffer
  s390/cpumf: introduce AUX buffer for dump diagnostic sample data
  s390/disassembler: increase show_code buffer size
  s390: Remove CONFIG_HARDENED_USERCOPY
  s390: enable CPU alternatives unconditionally
  s390/nmi: remove unused code
  s390/mm: remove unused code
  ...

1 files changed, 63 insertions, 0 deletions

diff --git a/tools/perf/arch/s390/util/unwind-libdw.c b/tools/perf/arch/s390/util/unwind-libdw.c
new file mode 100644
index 000000000000..387c698cdd1b
--- /dev/null
+++ b/tools/perf/arch/s390/util/unwind-libdw.c
@@ -0,0 +1,63 @@
+#include <linux/kernel.h>
+#include <elfutils/libdwfl.h>
+#include "../../util/unwind-libdw.h"
+#include "../../util/perf_regs.h"
+#include "../../util/event.h"
+#include "dwarf-regs-table.h"
+
+
+bool libdw__arch_set_initial_registers(Dwfl_Thread *thread, void *arg)
+{
+	struct unwind_info *ui = arg;
+	struct regs_dump *user_regs = &ui->sample->user_regs;
+	Dwarf_Word dwarf_regs[ARRAY_SIZE(s390_dwarf_regs)];
+
+#define REG(r) ({						\
+	Dwarf_Word val = 0;					\
+	perf_reg_value(&val, user_regs, PERF_REG_S390_##r);	\
+	val;							\
+})
+	/*
+	 * For DWARF register mapping details,
+	 * see also perf/arch/s390/include/dwarf-regs-table.h
+	 */
+	dwarf_regs[0]  = REG(R0);
+	dwarf_regs[1]  = REG(R1);
+	dwarf_regs[2]  = REG(R2);
+	dwarf_regs[3]  = REG(R3);
+	dwarf_regs[4]  = REG(R4);
+	dwarf_regs[5]  = REG(R5);
+	dwarf_regs[6]  = REG(R6);
+	dwarf_regs[7]  = REG(R7);
+	dwarf_regs[8]  = REG(R8);
+	dwarf_regs[9]  = REG(R9);
+	dwarf_regs[10] = REG(R10);
+	dwarf_regs[11] = REG(R11);
+	dwarf_regs[12] = REG(R12);
+	dwarf_regs[13] = REG(R13);
+	dwarf_regs[14] = REG(R14);
+	dwarf_regs[15] = REG(R15);
+
+	dwarf_regs[16] = REG(FP0);
+	dwarf_regs[17] = REG(FP2);
+	dwarf_regs[18] = REG(FP4);
+	dwarf_regs[19] = REG(FP6);
+	dwarf_regs[20] = REG(FP1);
+	dwarf_regs[21] = REG(FP3);
+	dwarf_regs[22] = REG(FP5);
+	dwarf_regs[23] = REG(FP7);
+	dwarf_regs[24] = REG(FP8);
+	dwarf_regs[25] = REG(FP10);
+	dwarf_regs[26] = REG(FP12);
+	dwarf_regs[27] = REG(FP14);
+	dwarf_regs[28] = REG(FP9);
+	dwarf_regs[29] = REG(FP11);
+	dwarf_regs[30] = REG(FP13);
+	dwarf_regs[31] = REG(FP15);
+
+	dwarf_regs[64] = REG(MASK);
+	dwarf_regs[65] = REG(PC);
+
+	dwfl_thread_state_register_pc(thread, dwarf_regs[65]);
+	return dwfl_thread_state_registers(thread, 0, 32, dwarf_regs);
+}