openucx/openucx-s390x-support.patch

commit 621654abd1ca34a407d8033991659c45d42c3a4e
Author: Nicolas Morey-Chaisemartin <nmoreychaisemartin@suse.com>
Date:   Thu Aug 9 07:41:24 2018 +0200

    openucx s390x support
    
    Signed-off-by: Nicolas Morey-Chaisemartin <nmoreychaisemartin@suse.com>

diff --git config/m4/ucm.m4 config/m4/ucm.m4
index 541bdb1322ce..4f89f6e02860 100644
--- config/m4/ucm.m4
+++ config/m4/ucm.m4
@@ -86,9 +86,19 @@ AC_CHECK_DECLS([SYS_ipc],
                [ipc_hooks_happy=no],
                [#include <sys/syscall.h>])
 
+SAVE_CFLAGS=$CFLAGS
+CFLAGS="$CLAGS -Isrc/"
+bistro_arch_happy=yes
+AC_CHECK_DECLS([ucm_bistro_patch],
+               [],
+               [ipc_hooks_happy=no],
+               [#include <ucm/bistro/bistro.h>])
+CFLAGS=$SAVE_CFLAGS
+
 AS_IF([test "x$mmap_hooks_happy" == "xyes"],
       AS_IF([test "x$ipc_hooks_happy" == "xyes" -o "x$shm_hooks_happy" == "xyes"],
-            [bistro_hooks_happy=yes]))
+	    AS_IF([test "x$bistro_arch_happy" == "xyes"],
+      	    [bistro_hooks_happy=yes])))
 
 AS_IF([test "x$bistro_hooks_happy" == "xyes"],
       [AC_DEFINE([UCM_BISTRO_HOOKS], [1], [Enable BISTRO hooks])],
diff --git src/ucm/Makefile.am src/ucm/Makefile.am
index 74090c4f2440..e466c13395b7 100644
--- src/ucm/Makefile.am
+++ src/ucm/Makefile.am
@@ -40,7 +40,8 @@ noinst_HEADERS = \
 	bistro/bistro.h \
 	bistro/bistro_x86_64.h \
 	bistro/bistro_aarch64.h \
-	bistro/bistro_ppc64.h
+	bistro/bistro_ppc64.h \
+	bistro/bistro_s390x.h
 
 if HAVE_CUDA
 noinst_HEADERS += \
diff --git src/ucm/bistro/bistro.h src/ucm/bistro/bistro.h
index 16e988700c35..b4c2762fb5b2 100644
--- src/ucm/bistro/bistro.h
+++ src/ucm/bistro/bistro.h
@@ -20,6 +20,8 @@ typedef struct ucm_bistro_restore_point ucm_bistro_restore_point_t;
 #  include "bistro_aarch64.h"
 #elif defined(__x86_64__)
 #  include "bistro_x86_64.h"
+#elif defined(__s390x__)
+#  include "bistro_s390x.h"
 #else
 #  error "Unsupported architecture"
 #endif
diff --git src/ucm/bistro/bistro_s390x.h src/ucm/bistro/bistro_s390x.h
new file mode 100644
index 000000000000..334c0474e8b6
--- /dev/null
+++ src/ucm/bistro/bistro_s390x.h
@@ -0,0 +1,13 @@
+#ifndef UCM_BISTRO_BISTRO_S390X_H_
+#define UCM_BISTRO_BISTRO_S390X_H_
+
+#include <stdint.h>
+
+#include <ucs/type/status.h>
+#include <ucs/sys/compiler_def.h>
+
+#define UCM_BISTRO_PROLOGUE
+#define UCM_BISTRO_EPILOGUE
+
+
+#endif
diff --git src/ucm/mmap/install.c src/ucm/mmap/install.c
index ebf22aaa0415..80ed26838837 100644
--- src/ucm/mmap/install.c
+++ src/ucm/mmap/install.c
@@ -173,7 +173,11 @@ static ucs_status_t ucs_mmap_install_reloc(int events)
                 status = ucm_reloc_modify(&entry->patch);
             } else {
                 ucs_assert(ucm_mmap_hook_mode() == UCM_MMAP_HOOK_BISTRO);
+#if UCM_BISTRO_HOOKS
                 status = ucm_bistro_patch(entry->patch.symbol, entry->patch.value, NULL);
+#else
+				status = UCS_ERR_UNSUPPORTED;
+#endif
             }
             if (status != UCS_OK) {
                 ucm_warn("failed to install %s hook for '%s'",
diff --git src/ucs/Makefile.am src/ucs/Makefile.am
index f82540e775a4..592d89c51109 100644
--- src/ucs/Makefile.am
+++ src/ucs/Makefile.am
@@ -57,6 +57,8 @@ noinst_HEADERS = \
 	arch/generic/cpu.h \
 	arch/ppc64/bitops.h \
 	arch/ppc64/cpu.h \
+	arch/s390x/bitops.h \
+	arch/s390x/cpu.h \
 	arch/x86_64/atomic.h \
 	arch/x86_64/bitops.h \
 	arch/x86_64/cpu.h \
diff --git src/ucs/arch/atomic.h src/ucs/arch/atomic.h
index 0caea9b1f3ba..d9afa780bbc5 100644
--- src/ucs/arch/atomic.h
+++ src/ucs/arch/atomic.h
@@ -15,6 +15,8 @@
 #  include "generic/atomic.h"
 #elif defined(__aarch64__)
 #  include "generic/atomic.h"
+#elif defined(__s390x__)
+#  include "generic/atomic.h"
 #else
 #  error "Unsupported architecture"
 #endif
diff --git src/ucs/arch/bitops.h src/ucs/arch/bitops.h
index 2049b7c71c8a..a4eceeea52e7 100644
--- src/ucs/arch/bitops.h
+++ src/ucs/arch/bitops.h
@@ -14,6 +14,8 @@
 #  include "ppc64/bitops.h"
 #elif defined(__aarch64__)
 #  include "aarch64/bitops.h"
+#elif defined(__s390x__)
+#  include "s390x/bitops.h"
 #else
 #  error "Unsupported architecture"
 #endif
diff --git src/ucs/arch/cpu.h src/ucs/arch/cpu.h
index 58a83825ee4a..a30456ba441d 100644
--- src/ucs/arch/cpu.h
+++ src/ucs/arch/cpu.h
@@ -59,6 +59,8 @@ typedef enum ucs_cpu_flag {
 #  include "ppc64/cpu.h"
 #elif defined(__aarch64__)
 #  include "aarch64/cpu.h"
+#elif defined(__s390x__)
+#  include "s390x/cpu.h"
 #else
 #  error "Unsupported architecture"
 #endif
diff --git src/ucs/arch/s390x/bitops.h src/ucs/arch/s390x/bitops.h
new file mode 100644
index 000000000000..39ad125107e9
--- /dev/null
+++ src/ucs/arch/s390x/bitops.h
@@ -0,0 +1,32 @@
+/**
+* Copyright (C) Mellanox Technologies Ltd. 2001-2015.  ALL RIGHTS RESERVED.
+*
+* See file LICENSE for terms.
+*/
+
+#ifndef UCS_S390X_BITOPS_H_
+#define UCS_S390X_BITOPS_H_
+
+#include <stdint.h>
+
+
+static inline unsigned __ucs_ilog2_u32(uint32_t n)
+{
+	if (!n)
+		return 0;
+	return 31 - __builtin_clz(n);
+}
+
+static inline unsigned __ucs_ilog2_u64(uint64_t n)
+{
+	if (!n)
+		return 0;
+	return 63 - __builtin_clz(n);
+}
+
+static inline unsigned ucs_ffs64(uint64_t n)
+{
+    return __ucs_ilog2_u64(n & -n);
+}
+
+#endif
diff --git src/ucs/arch/s390x/cpu.h src/ucs/arch/s390x/cpu.h
new file mode 100644
index 000000000000..b8ab713d6e21
--- /dev/null
+++ src/ucs/arch/s390x/cpu.h
@@ -0,0 +1,53 @@
+/**
+* Copyright (C) Mellanox Technologies Ltd. 2001-2013.  ALL RIGHTS RESERVED.
+* Copyright (C) ARM Ltd. 2016-2017.  ALL RIGHTS RESERVED.
+*
+* See file LICENSE for terms.
+*/
+
+
+#ifndef UCS_S390X_CPU_H_
+#define UCS_S390X_CPU_H_
+
+#include <ucs/sys/compiler.h>
+#include <ucs/arch/generic/cpu.h>
+#include <stdint.h>
+
+
+#define UCS_ARCH_CACHE_LINE_SIZE 256
+
+/* Assume the worst - weak memory ordering */
+#define ucs_memory_bus_fence()        asm volatile (""::: "memory")
+#define ucs_memory_bus_store_fence()  ucs_memory_bus_fence()
+#define ucs_memory_bus_load_fence()   ucs_memory_bus_fence()
+#define ucs_memory_bus_wc_flush()     ucs_memory_bus_fence()
+#define ucs_memory_cpu_fence()        ucs_memory_bus_fence()
+#define ucs_memory_cpu_store_fence()  ucs_memory_bus_fence()
+#define ucs_memory_cpu_load_fence()   ucs_memory_bus_fence()
+#define ucs_memory_cpu_wc_fence()     ucs_memory_bus_fence()
+
+
+static inline uint64_t ucs_arch_read_hres_clock()
+{
+    unsigned long  clk;
+    asm volatile("stck %0" : "=Q" (clk) : : "cc");
+    return clk >> 2;
+}
+#define ucs_arch_get_clocks_per_sec ucs_arch_generic_get_clocks_per_sec
+
+
+static inline ucs_cpu_model_t ucs_arch_get_cpu_model()
+{
+    return UCS_CPU_MODEL_UNKNOWN;
+}
+
+static inline int ucs_arch_get_cpu_flag()
+{
+    return UCS_CPU_FLAG_UNKNOWN;
+}
+
+double ucs_arch_get_clocks_per_sec();
+
+#define ucs_arch_wait_mem ucs_arch_generic_wait_mem
+
+#endif