[PATCH 16/30] selftests/rseq: s390: Template memory ordering and percpu access mode

[Mathieu Desnoyers <mathieu.desnoyers@efficios.com>]

Introduce a rseq-s390-bits.h template header which is internally included
to generate the static inline functions covering:

- relaxed and release memory ordering,
- per-cpu-id and per-mm-cid per-cpu data access.

Signed-off-by: Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
Cc: Vasily Gorbik <gor@linux.ibm.com>
Cc: Heiko Carstens <heiko.carstens@de.ibm.com>
Cc: Martin Schwidefsky <schwidefsky@de.ibm.com>
---
Changes since v4:
- Use RSEQ_TEMPLATE_CPU_ID_FIELD.
---
 tools/testing/selftests/rseq/rseq-s390-bits.h | 474 +++++++++++++++++
 tools/testing/selftests/rseq/rseq-s390.h      | 490 +-----------------
 2 files changed, 498 insertions(+), 466 deletions(-)
 create mode 100644 tools/testing/selftests/rseq/rseq-s390-bits.h

diff --git a/tools/testing/selftests/rseq/rseq-s390-bits.h b/tools/testing/selftests/rseq/rseq-s390-bits.h
new file mode 100644
index 000000000000..0cf17d9f170a
--- /dev/null
+++ b/tools/testing/selftests/rseq/rseq-s390-bits.h
@@ -0,0 +1,474 @@
+/* SPDX-License-Identifier: LGPL-2.1 OR MIT */
+
+#include "rseq-bits-template.h"
+
+#if defined(RSEQ_TEMPLATE_MO_RELAXED) && \
+	(defined(RSEQ_TEMPLATE_CPU_ID) || defined(RSEQ_TEMPLATE_MM_CID))
+
+static inline __attribute__((always_inline))
+int RSEQ_TEMPLATE_IDENTIFIER(rseq_cmpeqv_storev)(intptr_t *v, intptr_t expect, intptr_t newv, int cpu)
+{
+	RSEQ_INJECT_C(9)
+
+	__asm__ __volatile__ goto (
+		RSEQ_ASM_DEFINE_TABLE(3, 1f, 2f, 4f) /* start, commit, abort */
+		RSEQ_ASM_DEFINE_EXIT_POINT(1f, %l[cmpfail])
+#ifdef RSEQ_COMPARE_TWICE
+		RSEQ_ASM_DEFINE_EXIT_POINT(1f, %l[error1])
+		RSEQ_ASM_DEFINE_EXIT_POINT(1f, %l[error2])
+#endif
+		/* Start rseq by storing table entry pointer into rseq_cs. */
+		RSEQ_ASM_STORE_RSEQ_CS(1, 3b, rseq_cs)
+		RSEQ_ASM_CMP_CPU_ID(cpu_id, current_cpu_id, 4f)
+		RSEQ_INJECT_ASM(3)
+		LONG_CMP " %[expect], %[v]\n\t"
+		"jnz %l[cmpfail]\n\t"
+		RSEQ_INJECT_ASM(4)
+#ifdef RSEQ_COMPARE_TWICE
+		RSEQ_ASM_CMP_CPU_ID(cpu_id, current_cpu_id, %l[error1])
+		LONG_CMP " %[expect], %[v]\n\t"
+		"jnz %l[error2]\n\t"
+#endif
+		/* final store */
+		LONG_S " %[newv], %[v]\n\t"
+		"2:\n\t"
+		RSEQ_INJECT_ASM(5)
+		RSEQ_ASM_DEFINE_ABORT(4, "", abort)
+		: /* gcc asm goto does not allow outputs */
+		: [cpu_id]		"r" (cpu),
+		  [current_cpu_id]	"m" (rseq_get_abi()->RSEQ_TEMPLATE_CPU_ID_FIELD),
+		  [rseq_cs]		"m" (rseq_get_abi()->rseq_cs.arch.ptr),
+		  [v]			"m" (*v),
+		  [expect]		"r" (expect),
+		  [newv]		"r" (newv)
+		  RSEQ_INJECT_INPUT
+		: "memory", "cc", "r0"
+		  RSEQ_INJECT_CLOBBER
+		: abort, cmpfail
+#ifdef RSEQ_COMPARE_TWICE
+		  , error1, error2
+#endif
+	);
+	rseq_after_asm_goto();
+	return 0;
+abort:
+	rseq_after_asm_goto();
+	RSEQ_INJECT_FAILED
+	return -1;
+cmpfail:
+	rseq_after_asm_goto();
+	return 1;
+#ifdef RSEQ_COMPARE_TWICE
+error1:
+	rseq_after_asm_goto();
+	rseq_bug("cpu_id comparison failed");
+error2:
+	rseq_after_asm_goto();
+	rseq_bug("expected value comparison failed");
+#endif
+}
+
+/*
+ * Compare @v against @expectnot. When it does _not_ match, load @v
+ * into @load, and store the content of *@v + voffp into @v.
+ */
+static inline __attribute__((always_inline))
+int RSEQ_TEMPLATE_IDENTIFIER(rseq_cmpnev_storeoffp_load)(intptr_t *v, intptr_t expectnot,
+			       long voffp, intptr_t *load, int cpu)
+{
+	RSEQ_INJECT_C(9)
+
+	__asm__ __volatile__ goto (
+		RSEQ_ASM_DEFINE_TABLE(3, 1f, 2f, 4f) /* start, commit, abort */
+		RSEQ_ASM_DEFINE_EXIT_POINT(1f, %l[cmpfail])
+#ifdef RSEQ_COMPARE_TWICE
+		RSEQ_ASM_DEFINE_EXIT_POINT(1f, %l[error1])
+		RSEQ_ASM_DEFINE_EXIT_POINT(1f, %l[error2])
+#endif
+		/* Start rseq by storing table entry pointer into rseq_cs. */
+		RSEQ_ASM_STORE_RSEQ_CS(1, 3b, rseq_cs)
+		RSEQ_ASM_CMP_CPU_ID(cpu_id, current_cpu_id, 4f)
+		RSEQ_INJECT_ASM(3)
+		LONG_L " %%r1, %[v]\n\t"
+		LONG_CMP_R " %%r1, %[expectnot]\n\t"
+		"je %l[cmpfail]\n\t"
+		RSEQ_INJECT_ASM(4)
+#ifdef RSEQ_COMPARE_TWICE
+		RSEQ_ASM_CMP_CPU_ID(cpu_id, current_cpu_id, %l[error1])
+		LONG_L " %%r1, %[v]\n\t"
+		LONG_CMP_R " %%r1, %[expectnot]\n\t"
+		"je %l[error2]\n\t"
+#endif
+		LONG_S " %%r1, %[load]\n\t"
+		LONG_ADD_R " %%r1, %[voffp]\n\t"
+		LONG_L " %%r1, 0(%%r1)\n\t"
+		/* final store */
+		LONG_S " %%r1, %[v]\n\t"
+		"2:\n\t"
+		RSEQ_INJECT_ASM(5)
+		RSEQ_ASM_DEFINE_ABORT(4, "", abort)
+		: /* gcc asm goto does not allow outputs */
+		: [cpu_id]		"r" (cpu),
+		  [current_cpu_id]	"m" (rseq_get_abi()->RSEQ_TEMPLATE_CPU_ID_FIELD),
+		  [rseq_cs]		"m" (rseq_get_abi()->rseq_cs.arch.ptr),
+		  /* final store input */
+		  [v]			"m" (*v),
+		  [expectnot]		"r" (expectnot),
+		  [voffp]		"r" (voffp),
+		  [load]		"m" (*load)
+		  RSEQ_INJECT_INPUT
+		: "memory", "cc", "r0", "r1"
+		  RSEQ_INJECT_CLOBBER
+		: abort, cmpfail
+#ifdef RSEQ_COMPARE_TWICE
+		  , error1, error2
+#endif
+	);
+	rseq_after_asm_goto();
+	return 0;
+abort:
+	rseq_after_asm_goto();
+	RSEQ_INJECT_FAILED
+	return -1;
+cmpfail:
+	rseq_after_asm_goto();
+	return 1;
+#ifdef RSEQ_COMPARE_TWICE
+error1:
+	rseq_after_asm_goto();
+	rseq_bug("cpu_id comparison failed");
+error2:
+	rseq_after_asm_goto();
+	rseq_bug("expected value comparison failed");
+#endif
+}
+
+static inline __attribute__((always_inline))
+int RSEQ_TEMPLATE_IDENTIFIER(rseq_addv)(intptr_t *v, intptr_t count, int cpu)
+{
+	RSEQ_INJECT_C(9)
+
+	__asm__ __volatile__ goto (
+		RSEQ_ASM_DEFINE_TABLE(3, 1f, 2f, 4f) /* start, commit, abort */
+#ifdef RSEQ_COMPARE_TWICE
+		RSEQ_ASM_DEFINE_EXIT_POINT(1f, %l[error1])
+#endif
+		/* Start rseq by storing table entry pointer into rseq_cs. */
+		RSEQ_ASM_STORE_RSEQ_CS(1, 3b, rseq_cs)
+		RSEQ_ASM_CMP_CPU_ID(cpu_id, current_cpu_id, 4f)
+		RSEQ_INJECT_ASM(3)
+#ifdef RSEQ_COMPARE_TWICE
+		RSEQ_ASM_CMP_CPU_ID(cpu_id, current_cpu_id, %l[error1])
+#endif
+		LONG_L " %%r0, %[v]\n\t"
+		LONG_ADD_R " %%r0, %[count]\n\t"
+		/* final store */
+		LONG_S " %%r0, %[v]\n\t"
+		"2:\n\t"
+		RSEQ_INJECT_ASM(4)
+		RSEQ_ASM_DEFINE_ABORT(4, "", abort)
+		: /* gcc asm goto does not allow outputs */
+		: [cpu_id]		"r" (cpu),
+		  [current_cpu_id]	"m" (rseq_get_abi()->RSEQ_TEMPLATE_CPU_ID_FIELD),
+		  [rseq_cs]		"m" (rseq_get_abi()->rseq_cs.arch.ptr),
+		  /* final store input */
+		  [v]			"m" (*v),
+		  [count]		"r" (count)
+		  RSEQ_INJECT_INPUT
+		: "memory", "cc", "r0"
+		  RSEQ_INJECT_CLOBBER
+		: abort
+#ifdef RSEQ_COMPARE_TWICE
+		  , error1
+#endif
+	);
+	rseq_after_asm_goto();
+	return 0;
+abort:
+	rseq_after_asm_goto();
+	RSEQ_INJECT_FAILED
+	return -1;
+#ifdef RSEQ_COMPARE_TWICE
+error1:
+	rseq_after_asm_goto();
+	rseq_bug("cpu_id comparison failed");
+#endif
+}
+
+static inline __attribute__((always_inline))
+int RSEQ_TEMPLATE_IDENTIFIER(rseq_cmpeqv_cmpeqv_storev)(intptr_t *v, intptr_t expect,
+			      intptr_t *v2, intptr_t expect2,
+			      intptr_t newv, int cpu)
+{
+	RSEQ_INJECT_C(9)
+
+	__asm__ __volatile__ goto (
+		RSEQ_ASM_DEFINE_TABLE(3, 1f, 2f, 4f) /* start, commit, abort */
+		RSEQ_ASM_DEFINE_EXIT_POINT(1f, %l[cmpfail])
+#ifdef RSEQ_COMPARE_TWICE
+		RSEQ_ASM_DEFINE_EXIT_POINT(1f, %l[error1])
+		RSEQ_ASM_DEFINE_EXIT_POINT(1f, %l[error2])
+		RSEQ_ASM_DEFINE_EXIT_POINT(1f, %l[error3])
+#endif
+		/* Start rseq by storing table entry pointer into rseq_cs. */
+		RSEQ_ASM_STORE_RSEQ_CS(1, 3b, rseq_cs)
+		RSEQ_ASM_CMP_CPU_ID(cpu_id, current_cpu_id, 4f)
+		RSEQ_INJECT_ASM(3)
+		LONG_CMP " %[expect], %[v]\n\t"
+		"jnz %l[cmpfail]\n\t"
+		RSEQ_INJECT_ASM(4)
+		LONG_CMP " %[expect2], %[v2]\n\t"
+		"jnz %l[cmpfail]\n\t"
+		RSEQ_INJECT_ASM(5)
+#ifdef RSEQ_COMPARE_TWICE
+		RSEQ_ASM_CMP_CPU_ID(cpu_id, current_cpu_id, %l[error1])
+		LONG_CMP " %[expect], %[v]\n\t"
+		"jnz %l[error2]\n\t"
+		LONG_CMP " %[expect2], %[v2]\n\t"
+		"jnz %l[error3]\n\t"
+#endif
+		/* final store */
+		LONG_S " %[newv], %[v]\n\t"
+		"2:\n\t"
+		RSEQ_INJECT_ASM(6)
+		RSEQ_ASM_DEFINE_ABORT(4, "", abort)
+		: /* gcc asm goto does not allow outputs */
+		: [cpu_id]		"r" (cpu),
+		  [current_cpu_id]	"m" (rseq_get_abi()->RSEQ_TEMPLATE_CPU_ID_FIELD),
+		  [rseq_cs]		"m" (rseq_get_abi()->rseq_cs.arch.ptr),
+		  /* cmp2 input */
+		  [v2]			"m" (*v2),
+		  [expect2]		"r" (expect2),
+		  /* final store input */
+		  [v]			"m" (*v),
+		  [expect]		"r" (expect),
+		  [newv]		"r" (newv)
+		  RSEQ_INJECT_INPUT
+		: "memory", "cc", "r0"
+		  RSEQ_INJECT_CLOBBER
+		: abort, cmpfail
+#ifdef RSEQ_COMPARE_TWICE
+		  , error1, error2, error3
+#endif
+	);
+	rseq_after_asm_goto();
+	return 0;
+abort:
+	rseq_after_asm_goto();
+	RSEQ_INJECT_FAILED
+	return -1;
+cmpfail:
+	rseq_after_asm_goto();
+	return 1;
+#ifdef RSEQ_COMPARE_TWICE
+error1:
+	rseq_after_asm_goto();
+	rseq_bug("cpu_id comparison failed");
+error2:
+	rseq_after_asm_goto();
+	rseq_bug("1st expected value comparison failed");
+error3:
+	rseq_after_asm_goto();
+	rseq_bug("2nd expected value comparison failed");
+#endif
+}
+
+#endif /* #if defined(RSEQ_TEMPLATE_MO_RELAXED) &&
+	(defined(RSEQ_TEMPLATE_CPU_ID) || defined(RSEQ_TEMPLATE_MM_CID)) */
+
+#if (defined(RSEQ_TEMPLATE_MO_RELAXED) || defined(RSEQ_TEMPLATE_MO_RELEASE)) && \
+	(defined(RSEQ_TEMPLATE_CPU_ID) || defined(RSEQ_TEMPLATE_MM_CID))
+
+/* s390 is TSO. */
+static inline __attribute__((always_inline))
+int RSEQ_TEMPLATE_IDENTIFIER(rseq_cmpeqv_trystorev_storev)(intptr_t *v, intptr_t expect,
+				 intptr_t *v2, intptr_t newv2,
+				 intptr_t newv, int cpu)
+{
+	RSEQ_INJECT_C(9)
+
+	__asm__ __volatile__ goto (
+		RSEQ_ASM_DEFINE_TABLE(3, 1f, 2f, 4f) /* start, commit, abort */
+		RSEQ_ASM_DEFINE_EXIT_POINT(1f, %l[cmpfail])
+#ifdef RSEQ_COMPARE_TWICE
+		RSEQ_ASM_DEFINE_EXIT_POINT(1f, %l[error1])
+		RSEQ_ASM_DEFINE_EXIT_POINT(1f, %l[error2])
+#endif
+		/* Start rseq by storing table entry pointer into rseq_cs. */
+		RSEQ_ASM_STORE_RSEQ_CS(1, 3b, rseq_cs)
+		RSEQ_ASM_CMP_CPU_ID(cpu_id, current_cpu_id, 4f)
+		RSEQ_INJECT_ASM(3)
+		LONG_CMP " %[expect], %[v]\n\t"
+		"jnz %l[cmpfail]\n\t"
+		RSEQ_INJECT_ASM(4)
+#ifdef RSEQ_COMPARE_TWICE
+		RSEQ_ASM_CMP_CPU_ID(cpu_id, current_cpu_id, %l[error1])
+		LONG_CMP " %[expect], %[v]\n\t"
+		"jnz %l[error2]\n\t"
+#endif
+		/* try store */
+		LONG_S " %[newv2], %[v2]\n\t"
+		RSEQ_INJECT_ASM(5)
+		/* final store */
+		LONG_S " %[newv], %[v]\n\t"
+		"2:\n\t"
+		RSEQ_INJECT_ASM(6)
+		RSEQ_ASM_DEFINE_ABORT(4, "", abort)
+		: /* gcc asm goto does not allow outputs */
+		: [cpu_id]		"r" (cpu),
+		  [current_cpu_id]	"m" (rseq_get_abi()->RSEQ_TEMPLATE_CPU_ID_FIELD),
+		  [rseq_cs]		"m" (rseq_get_abi()->rseq_cs.arch.ptr),
+		  /* try store input */
+		  [v2]			"m" (*v2),
+		  [newv2]		"r" (newv2),
+		  /* final store input */
+		  [v]			"m" (*v),
+		  [expect]		"r" (expect),
+		  [newv]		"r" (newv)
+		  RSEQ_INJECT_INPUT
+		: "memory", "cc", "r0"
+		  RSEQ_INJECT_CLOBBER
+		: abort, cmpfail
+#ifdef RSEQ_COMPARE_TWICE
+		  , error1, error2
+#endif
+	);
+	rseq_after_asm_goto();
+	return 0;
+abort:
+	rseq_after_asm_goto();
+	RSEQ_INJECT_FAILED
+	return -1;
+cmpfail:
+	rseq_after_asm_goto();
+	return 1;
+#ifdef RSEQ_COMPARE_TWICE
+error1:
+	rseq_after_asm_goto();
+	rseq_bug("cpu_id comparison failed");
+error2:
+	rseq_after_asm_goto();
+	rseq_bug("expected value comparison failed");
+#endif
+}
+
+/* s390 is TSO. */
+static inline __attribute__((always_inline))
+int RSEQ_TEMPLATE_IDENTIFIER(rseq_cmpeqv_trymemcpy_storev)(intptr_t *v, intptr_t expect,
+				 void *dst, void *src, size_t len,
+				 intptr_t newv, int cpu)
+{
+	uint64_t rseq_scratch[3];
+
+	RSEQ_INJECT_C(9)
+
+	__asm__ __volatile__ goto (
+		RSEQ_ASM_DEFINE_TABLE(3, 1f, 2f, 4f) /* start, commit, abort */
+		RSEQ_ASM_DEFINE_EXIT_POINT(1f, %l[cmpfail])
+#ifdef RSEQ_COMPARE_TWICE
+		RSEQ_ASM_DEFINE_EXIT_POINT(1f, %l[error1])
+		RSEQ_ASM_DEFINE_EXIT_POINT(1f, %l[error2])
+#endif
+		LONG_S " %[src], %[rseq_scratch0]\n\t"
+		LONG_S " %[dst], %[rseq_scratch1]\n\t"
+		LONG_S " %[len], %[rseq_scratch2]\n\t"
+		/* Start rseq by storing table entry pointer into rseq_cs. */
+		RSEQ_ASM_STORE_RSEQ_CS(1, 3b, rseq_cs)
+		RSEQ_ASM_CMP_CPU_ID(cpu_id, current_cpu_id, 4f)
+		RSEQ_INJECT_ASM(3)
+		LONG_CMP " %[expect], %[v]\n\t"
+		"jnz 5f\n\t"
+		RSEQ_INJECT_ASM(4)
+#ifdef RSEQ_COMPARE_TWICE
+		RSEQ_ASM_CMP_CPU_ID(cpu_id, current_cpu_id, 6f)
+		LONG_CMP " %[expect], %[v]\n\t"
+		"jnz 7f\n\t"
+#endif
+		/* try memcpy */
+		LONG_LT_R " %[len], %[len]\n\t"
+		"jz 333f\n\t"
+		"222:\n\t"
+		"ic %%r0,0(%[src])\n\t"
+		"stc %%r0,0(%[dst])\n\t"
+		LONG_ADDI " %[src], 1\n\t"
+		LONG_ADDI " %[dst], 1\n\t"
+		LONG_ADDI " %[len], -1\n\t"
+		"jnz 222b\n\t"
+		"333:\n\t"
+		RSEQ_INJECT_ASM(5)
+		/* final store */
+		LONG_S " %[newv], %[v]\n\t"
+		"2:\n\t"
+		RSEQ_INJECT_ASM(6)
+		/* teardown */
+		LONG_L " %[len], %[rseq_scratch2]\n\t"
+		LONG_L " %[dst], %[rseq_scratch1]\n\t"
+		LONG_L " %[src], %[rseq_scratch0]\n\t"
+		RSEQ_ASM_DEFINE_ABORT(4,
+			LONG_L " %[len], %[rseq_scratch2]\n\t"
+			LONG_L " %[dst], %[rseq_scratch1]\n\t"
+			LONG_L " %[src], %[rseq_scratch0]\n\t",
+			abort)
+		RSEQ_ASM_DEFINE_CMPFAIL(5,
+			LONG_L " %[len], %[rseq_scratch2]\n\t"
+			LONG_L " %[dst], %[rseq_scratch1]\n\t"
+			LONG_L " %[src], %[rseq_scratch0]\n\t",
+			cmpfail)
+#ifdef RSEQ_COMPARE_TWICE
+		RSEQ_ASM_DEFINE_CMPFAIL(6,
+			LONG_L " %[len], %[rseq_scratch2]\n\t"
+			LONG_L " %[dst], %[rseq_scratch1]\n\t"
+			LONG_L " %[src], %[rseq_scratch0]\n\t",
+			error1)
+		RSEQ_ASM_DEFINE_CMPFAIL(7,
+			LONG_L " %[len], %[rseq_scratch2]\n\t"
+			LONG_L " %[dst], %[rseq_scratch1]\n\t"
+			LONG_L " %[src], %[rseq_scratch0]\n\t",
+			error2)
+#endif
+		: /* gcc asm goto does not allow outputs */
+		: [cpu_id]		"r" (cpu),
+		  [current_cpu_id]	"m" (rseq_get_abi()->RSEQ_TEMPLATE_CPU_ID_FIELD),
+		  [rseq_cs]		"m" (rseq_get_abi()->rseq_cs.arch.ptr),
+		  /* final store input */
+		  [v]			"m" (*v),
+		  [expect]		"r" (expect),
+		  [newv]		"r" (newv),
+		  /* try memcpy input */
+		  [dst]			"r" (dst),
+		  [src]			"r" (src),
+		  [len]			"r" (len),
+		  [rseq_scratch0]	"m" (rseq_scratch[0]),
+		  [rseq_scratch1]	"m" (rseq_scratch[1]),
+		  [rseq_scratch2]	"m" (rseq_scratch[2])
+		  RSEQ_INJECT_INPUT
+		: "memory", "cc", "r0"
+		  RSEQ_INJECT_CLOBBER
+		: abort, cmpfail
+#ifdef RSEQ_COMPARE_TWICE
+		  , error1, error2
+#endif
+	);
+	rseq_after_asm_goto();
+	return 0;
+abort:
+	rseq_after_asm_goto();
+	RSEQ_INJECT_FAILED
+	return -1;
+cmpfail:
+	rseq_after_asm_goto();
+	return 1;
+#ifdef RSEQ_COMPARE_TWICE
+error1:
+	rseq_after_asm_goto();
+	rseq_bug("cpu_id comparison failed");
+error2:
+	rseq_after_asm_goto();
+	rseq_bug("expected value comparison failed");
+#endif
+}
+
+#endif /* #if (defined(RSEQ_TEMPLATE_MO_RELAXED) || defined(RSEQ_TEMPLATE_MO_RELEASE)) &&
+	(defined(RSEQ_TEMPLATE_CPU_ID) || defined(RSEQ_TEMPLATE_MM_CID)) */
+
+#include "rseq-bits-reset.h"
diff --git a/tools/testing/selftests/rseq/rseq-s390.h b/tools/testing/selftests/rseq/rseq-s390.h
index 4d3286453bbf..46c92598acc7 100644
--- a/tools/testing/selftests/rseq/rseq-s390.h
+++ b/tools/testing/selftests/rseq/rseq-s390.h
@@ -130,476 +130,34 @@ do {									\
 		"jg %l[" __rseq_str(cmpfail_label) "]\n\t"		\
 		".popsection\n\t"
 
-static inline __attribute__((always_inline))
-int rseq_cmpeqv_storev(intptr_t *v, intptr_t expect, intptr_t newv, int cpu)
-{
-	RSEQ_INJECT_C(9)
+/* Per-cpu-id indexing. */
 
-	__asm__ __volatile__ goto (
-		RSEQ_ASM_DEFINE_TABLE(3, 1f, 2f, 4f) /* start, commit, abort */
-		RSEQ_ASM_DEFINE_EXIT_POINT(1f, %l[cmpfail])
-#ifdef RSEQ_COMPARE_TWICE
-		RSEQ_ASM_DEFINE_EXIT_POINT(1f, %l[error1])
-		RSEQ_ASM_DEFINE_EXIT_POINT(1f, %l[error2])
-#endif
-		/* Start rseq by storing table entry pointer into rseq_cs. */
-		RSEQ_ASM_STORE_RSEQ_CS(1, 3b, rseq_cs)
-		RSEQ_ASM_CMP_CPU_ID(cpu_id, current_cpu_id, 4f)
-		RSEQ_INJECT_ASM(3)
-		LONG_CMP " %[expect], %[v]\n\t"
-		"jnz %l[cmpfail]\n\t"
-		RSEQ_INJECT_ASM(4)
-#ifdef RSEQ_COMPARE_TWICE
-		RSEQ_ASM_CMP_CPU_ID(cpu_id, current_cpu_id, %l[error1])
-		LONG_CMP " %[expect], %[v]\n\t"
-		"jnz %l[error2]\n\t"
-#endif
-		/* final store */
-		LONG_S " %[newv], %[v]\n\t"
-		"2:\n\t"
-		RSEQ_INJECT_ASM(5)
-		RSEQ_ASM_DEFINE_ABORT(4, "", abort)
-		: /* gcc asm goto does not allow outputs */
-		: [cpu_id]		"r" (cpu),
-		  [current_cpu_id]	"m" (rseq_get_abi()->cpu_id),
-		  [rseq_cs]		"m" (rseq_get_abi()->rseq_cs.arch.ptr),
-		  [v]			"m" (*v),
-		  [expect]		"r" (expect),
-		  [newv]		"r" (newv)
-		  RSEQ_INJECT_INPUT
-		: "memory", "cc", "r0"
-		  RSEQ_INJECT_CLOBBER
-		: abort, cmpfail
-#ifdef RSEQ_COMPARE_TWICE
-		  , error1, error2
-#endif
-	);
-	rseq_after_asm_goto();
-	return 0;
-abort:
-	rseq_after_asm_goto();
-	RSEQ_INJECT_FAILED
-	return -1;
-cmpfail:
-	rseq_after_asm_goto();
-	return 1;
-#ifdef RSEQ_COMPARE_TWICE
-error1:
-	rseq_after_asm_goto();
-	rseq_bug("cpu_id comparison failed");
-error2:
-	rseq_after_asm_goto();
-	rseq_bug("expected value comparison failed");
-#endif
-}
-
-/*
- * Compare @v against @expectnot. When it does _not_ match, load @v
- * into @load, and store the content of *@v + voffp into @v.
- */
-static inline __attribute__((always_inline))
-int rseq_cmpnev_storeoffp_load(intptr_t *v, intptr_t expectnot,
-			       long voffp, intptr_t *load, int cpu)
-{
-	RSEQ_INJECT_C(9)
-
-	__asm__ __volatile__ goto (
-		RSEQ_ASM_DEFINE_TABLE(3, 1f, 2f, 4f) /* start, commit, abort */
-		RSEQ_ASM_DEFINE_EXIT_POINT(1f, %l[cmpfail])
-#ifdef RSEQ_COMPARE_TWICE
-		RSEQ_ASM_DEFINE_EXIT_POINT(1f, %l[error1])
-		RSEQ_ASM_DEFINE_EXIT_POINT(1f, %l[error2])
-#endif
-		/* Start rseq by storing table entry pointer into rseq_cs. */
-		RSEQ_ASM_STORE_RSEQ_CS(1, 3b, rseq_cs)
-		RSEQ_ASM_CMP_CPU_ID(cpu_id, current_cpu_id, 4f)
-		RSEQ_INJECT_ASM(3)
-		LONG_L " %%r1, %[v]\n\t"
-		LONG_CMP_R " %%r1, %[expectnot]\n\t"
-		"je %l[cmpfail]\n\t"
-		RSEQ_INJECT_ASM(4)
-#ifdef RSEQ_COMPARE_TWICE
-		RSEQ_ASM_CMP_CPU_ID(cpu_id, current_cpu_id, %l[error1])
-		LONG_L " %%r1, %[v]\n\t"
-		LONG_CMP_R " %%r1, %[expectnot]\n\t"
-		"je %l[error2]\n\t"
-#endif
-		LONG_S " %%r1, %[load]\n\t"
-		LONG_ADD_R " %%r1, %[voffp]\n\t"
-		LONG_L " %%r1, 0(%%r1)\n\t"
-		/* final store */
-		LONG_S " %%r1, %[v]\n\t"
-		"2:\n\t"
-		RSEQ_INJECT_ASM(5)
-		RSEQ_ASM_DEFINE_ABORT(4, "", abort)
-		: /* gcc asm goto does not allow outputs */
-		: [cpu_id]		"r" (cpu),
-		  [current_cpu_id]	"m" (rseq_get_abi()->cpu_id),
-		  [rseq_cs]		"m" (rseq_get_abi()->rseq_cs.arch.ptr),
-		  /* final store input */
-		  [v]			"m" (*v),
-		  [expectnot]		"r" (expectnot),
-		  [voffp]		"r" (voffp),
-		  [load]		"m" (*load)
-		  RSEQ_INJECT_INPUT
-		: "memory", "cc", "r0", "r1"
-		  RSEQ_INJECT_CLOBBER
-		: abort, cmpfail
-#ifdef RSEQ_COMPARE_TWICE
-		  , error1, error2
-#endif
-	);
-	rseq_after_asm_goto();
-	return 0;
-abort:
-	rseq_after_asm_goto();
-	RSEQ_INJECT_FAILED
-	return -1;
-cmpfail:
-	rseq_after_asm_goto();
-	return 1;
-#ifdef RSEQ_COMPARE_TWICE
-error1:
-	rseq_after_asm_goto();
-	rseq_bug("cpu_id comparison failed");
-error2:
-	rseq_after_asm_goto();
-	rseq_bug("expected value comparison failed");
-#endif
-}
-
-static inline __attribute__((always_inline))
-int rseq_addv(intptr_t *v, intptr_t count, int cpu)
-{
-	RSEQ_INJECT_C(9)
-
-	__asm__ __volatile__ goto (
-		RSEQ_ASM_DEFINE_TABLE(3, 1f, 2f, 4f) /* start, commit, abort */
-#ifdef RSEQ_COMPARE_TWICE
-		RSEQ_ASM_DEFINE_EXIT_POINT(1f, %l[error1])
-#endif
-		/* Start rseq by storing table entry pointer into rseq_cs. */
-		RSEQ_ASM_STORE_RSEQ_CS(1, 3b, rseq_cs)
-		RSEQ_ASM_CMP_CPU_ID(cpu_id, current_cpu_id, 4f)
-		RSEQ_INJECT_ASM(3)
-#ifdef RSEQ_COMPARE_TWICE
-		RSEQ_ASM_CMP_CPU_ID(cpu_id, current_cpu_id, %l[error1])
-#endif
-		LONG_L " %%r0, %[v]\n\t"
-		LONG_ADD_R " %%r0, %[count]\n\t"
-		/* final store */
-		LONG_S " %%r0, %[v]\n\t"
-		"2:\n\t"
-		RSEQ_INJECT_ASM(4)
-		RSEQ_ASM_DEFINE_ABORT(4, "", abort)
-		: /* gcc asm goto does not allow outputs */
-		: [cpu_id]		"r" (cpu),
-		  [current_cpu_id]	"m" (rseq_get_abi()->cpu_id),
-		  [rseq_cs]		"m" (rseq_get_abi()->rseq_cs.arch.ptr),
-		  /* final store input */
-		  [v]			"m" (*v),
-		  [count]		"r" (count)
-		  RSEQ_INJECT_INPUT
-		: "memory", "cc", "r0"
-		  RSEQ_INJECT_CLOBBER
-		: abort
-#ifdef RSEQ_COMPARE_TWICE
-		  , error1
-#endif
-	);
-	rseq_after_asm_goto();
-	return 0;
-abort:
-	rseq_after_asm_goto();
-	RSEQ_INJECT_FAILED
-	return -1;
-#ifdef RSEQ_COMPARE_TWICE
-error1:
-	rseq_after_asm_goto();
-	rseq_bug("cpu_id comparison failed");
-#endif
-}
+#define RSEQ_TEMPLATE_CPU_ID
+#define RSEQ_TEMPLATE_MO_RELAXED
+#include "rseq-s390-bits.h"
+#undef RSEQ_TEMPLATE_MO_RELAXED
 
-static inline __attribute__((always_inline))
-int rseq_cmpeqv_trystorev_storev(intptr_t *v, intptr_t expect,
-				 intptr_t *v2, intptr_t newv2,
-				 intptr_t newv, int cpu)
-{
-	RSEQ_INJECT_C(9)
+#define RSEQ_TEMPLATE_MO_RELEASE
+#include "rseq-s390-bits.h"
+#undef RSEQ_TEMPLATE_MO_RELEASE
+#undef RSEQ_TEMPLATE_CPU_ID
 
-	__asm__ __volatile__ goto (
-		RSEQ_ASM_DEFINE_TABLE(3, 1f, 2f, 4f) /* start, commit, abort */
-		RSEQ_ASM_DEFINE_EXIT_POINT(1f, %l[cmpfail])
-#ifdef RSEQ_COMPARE_TWICE
-		RSEQ_ASM_DEFINE_EXIT_POINT(1f, %l[error1])
-		RSEQ_ASM_DEFINE_EXIT_POINT(1f, %l[error2])
-#endif
-		/* Start rseq by storing table entry pointer into rseq_cs. */
-		RSEQ_ASM_STORE_RSEQ_CS(1, 3b, rseq_cs)
-		RSEQ_ASM_CMP_CPU_ID(cpu_id, current_cpu_id, 4f)
-		RSEQ_INJECT_ASM(3)
-		LONG_CMP " %[expect], %[v]\n\t"
-		"jnz %l[cmpfail]\n\t"
-		RSEQ_INJECT_ASM(4)
-#ifdef RSEQ_COMPARE_TWICE
-		RSEQ_ASM_CMP_CPU_ID(cpu_id, current_cpu_id, %l[error1])
-		LONG_CMP " %[expect], %[v]\n\t"
-		"jnz %l[error2]\n\t"
-#endif
-		/* try store */
-		LONG_S " %[newv2], %[v2]\n\t"
-		RSEQ_INJECT_ASM(5)
-		/* final store */
-		LONG_S " %[newv], %[v]\n\t"
-		"2:\n\t"
-		RSEQ_INJECT_ASM(6)
-		RSEQ_ASM_DEFINE_ABORT(4, "", abort)
-		: /* gcc asm goto does not allow outputs */
-		: [cpu_id]		"r" (cpu),
-		  [current_cpu_id]	"m" (rseq_get_abi()->cpu_id),
-		  [rseq_cs]		"m" (rseq_get_abi()->rseq_cs.arch.ptr),
-		  /* try store input */
-		  [v2]			"m" (*v2),
-		  [newv2]		"r" (newv2),
-		  /* final store input */
-		  [v]			"m" (*v),
-		  [expect]		"r" (expect),
-		  [newv]		"r" (newv)
-		  RSEQ_INJECT_INPUT
-		: "memory", "cc", "r0"
-		  RSEQ_INJECT_CLOBBER
-		: abort, cmpfail
-#ifdef RSEQ_COMPARE_TWICE
-		  , error1, error2
-#endif
-	);
-	rseq_after_asm_goto();
-	return 0;
-abort:
-	rseq_after_asm_goto();
-	RSEQ_INJECT_FAILED
-	return -1;
-cmpfail:
-	rseq_after_asm_goto();
-	return 1;
-#ifdef RSEQ_COMPARE_TWICE
-error1:
-	rseq_after_asm_goto();
-	rseq_bug("cpu_id comparison failed");
-error2:
-	rseq_after_asm_goto();
-	rseq_bug("expected value comparison failed");
-#endif
-}
+/* Per-mm-cid indexing. */
 
-/* s390 is TSO. */
-static inline __attribute__((always_inline))
-int rseq_cmpeqv_trystorev_storev_release(intptr_t *v, intptr_t expect,
-					 intptr_t *v2, intptr_t newv2,
-					 intptr_t newv, int cpu)
-{
-	return rseq_cmpeqv_trystorev_storev(v, expect, v2, newv2, newv, cpu);
-}
+#define RSEQ_TEMPLATE_MM_CID
+#define RSEQ_TEMPLATE_MO_RELAXED
+#include "rseq-s390-bits.h"
+#undef RSEQ_TEMPLATE_MO_RELAXED
 
-static inline __attribute__((always_inline))
-int rseq_cmpeqv_cmpeqv_storev(intptr_t *v, intptr_t expect,
-			      intptr_t *v2, intptr_t expect2,
-			      intptr_t newv, int cpu)
-{
-	RSEQ_INJECT_C(9)
+#define RSEQ_TEMPLATE_MO_RELEASE
+#include "rseq-s390-bits.h"
+#undef RSEQ_TEMPLATE_MO_RELEASE
+#undef RSEQ_TEMPLATE_MM_CID
 
-	__asm__ __volatile__ goto (
-		RSEQ_ASM_DEFINE_TABLE(3, 1f, 2f, 4f) /* start, commit, abort */
-		RSEQ_ASM_DEFINE_EXIT_POINT(1f, %l[cmpfail])
-#ifdef RSEQ_COMPARE_TWICE
-		RSEQ_ASM_DEFINE_EXIT_POINT(1f, %l[error1])
-		RSEQ_ASM_DEFINE_EXIT_POINT(1f, %l[error2])
-		RSEQ_ASM_DEFINE_EXIT_POINT(1f, %l[error3])
-#endif
-		/* Start rseq by storing table entry pointer into rseq_cs. */
-		RSEQ_ASM_STORE_RSEQ_CS(1, 3b, rseq_cs)
-		RSEQ_ASM_CMP_CPU_ID(cpu_id, current_cpu_id, 4f)
-		RSEQ_INJECT_ASM(3)
-		LONG_CMP " %[expect], %[v]\n\t"
-		"jnz %l[cmpfail]\n\t"
-		RSEQ_INJECT_ASM(4)
-		LONG_CMP " %[expect2], %[v2]\n\t"
-		"jnz %l[cmpfail]\n\t"
-		RSEQ_INJECT_ASM(5)
-#ifdef RSEQ_COMPARE_TWICE
-		RSEQ_ASM_CMP_CPU_ID(cpu_id, current_cpu_id, %l[error1])
-		LONG_CMP " %[expect], %[v]\n\t"
-		"jnz %l[error2]\n\t"
-		LONG_CMP " %[expect2], %[v2]\n\t"
-		"jnz %l[error3]\n\t"
-#endif
-		/* final store */
-		LONG_S " %[newv], %[v]\n\t"
-		"2:\n\t"
-		RSEQ_INJECT_ASM(6)
-		RSEQ_ASM_DEFINE_ABORT(4, "", abort)
-		: /* gcc asm goto does not allow outputs */
-		: [cpu_id]		"r" (cpu),
-		  [current_cpu_id]	"m" (rseq_get_abi()->cpu_id),
-		  [rseq_cs]		"m" (rseq_get_abi()->rseq_cs.arch.ptr),
-		  /* cmp2 input */
-		  [v2]			"m" (*v2),
-		  [expect2]		"r" (expect2),
-		  /* final store input */
-		  [v]			"m" (*v),
-		  [expect]		"r" (expect),
-		  [newv]		"r" (newv)
-		  RSEQ_INJECT_INPUT
-		: "memory", "cc", "r0"
-		  RSEQ_INJECT_CLOBBER
-		: abort, cmpfail
-#ifdef RSEQ_COMPARE_TWICE
-		  , error1, error2, error3
-#endif
-	);
-	rseq_after_asm_goto();
-	return 0;
-abort:
-	rseq_after_asm_goto();
-	RSEQ_INJECT_FAILED
-	return -1;
-cmpfail:
-	rseq_after_asm_goto();
-	return 1;
-#ifdef RSEQ_COMPARE_TWICE
-error1:
-	rseq_after_asm_goto();
-	rseq_bug("cpu_id comparison failed");
-error2:
-	rseq_after_asm_goto();
-	rseq_bug("1st expected value comparison failed");
-error3:
-	rseq_after_asm_goto();
-	rseq_bug("2nd expected value comparison failed");
-#endif
-}
-
-static inline __attribute__((always_inline))
-int rseq_cmpeqv_trymemcpy_storev(intptr_t *v, intptr_t expect,
-				 void *dst, void *src, size_t len,
-				 intptr_t newv, int cpu)
-{
-	uint64_t rseq_scratch[3];
-
-	RSEQ_INJECT_C(9)
-
-	__asm__ __volatile__ goto (
-		RSEQ_ASM_DEFINE_TABLE(3, 1f, 2f, 4f) /* start, commit, abort */
-		RSEQ_ASM_DEFINE_EXIT_POINT(1f, %l[cmpfail])
-#ifdef RSEQ_COMPARE_TWICE
-		RSEQ_ASM_DEFINE_EXIT_POINT(1f, %l[error1])
-		RSEQ_ASM_DEFINE_EXIT_POINT(1f, %l[error2])
-#endif
-		LONG_S " %[src], %[rseq_scratch0]\n\t"
-		LONG_S " %[dst], %[rseq_scratch1]\n\t"
-		LONG_S " %[len], %[rseq_scratch2]\n\t"
-		/* Start rseq by storing table entry pointer into rseq_cs. */
-		RSEQ_ASM_STORE_RSEQ_CS(1, 3b, rseq_cs)
-		RSEQ_ASM_CMP_CPU_ID(cpu_id, current_cpu_id, 4f)
-		RSEQ_INJECT_ASM(3)
-		LONG_CMP " %[expect], %[v]\n\t"
-		"jnz 5f\n\t"
-		RSEQ_INJECT_ASM(4)
-#ifdef RSEQ_COMPARE_TWICE
-		RSEQ_ASM_CMP_CPU_ID(cpu_id, current_cpu_id, 6f)
-		LONG_CMP " %[expect], %[v]\n\t"
-		"jnz 7f\n\t"
-#endif
-		/* try memcpy */
-		LONG_LT_R " %[len], %[len]\n\t"
-		"jz 333f\n\t"
-		"222:\n\t"
-		"ic %%r0,0(%[src])\n\t"
-		"stc %%r0,0(%[dst])\n\t"
-		LONG_ADDI " %[src], 1\n\t"
-		LONG_ADDI " %[dst], 1\n\t"
-		LONG_ADDI " %[len], -1\n\t"
-		"jnz 222b\n\t"
-		"333:\n\t"
-		RSEQ_INJECT_ASM(5)
-		/* final store */
-		LONG_S " %[newv], %[v]\n\t"
-		"2:\n\t"
-		RSEQ_INJECT_ASM(6)
-		/* teardown */
-		LONG_L " %[len], %[rseq_scratch2]\n\t"
-		LONG_L " %[dst], %[rseq_scratch1]\n\t"
-		LONG_L " %[src], %[rseq_scratch0]\n\t"
-		RSEQ_ASM_DEFINE_ABORT(4,
-			LONG_L " %[len], %[rseq_scratch2]\n\t"
-			LONG_L " %[dst], %[rseq_scratch1]\n\t"
-			LONG_L " %[src], %[rseq_scratch0]\n\t",
-			abort)
-		RSEQ_ASM_DEFINE_CMPFAIL(5,
-			LONG_L " %[len], %[rseq_scratch2]\n\t"
-			LONG_L " %[dst], %[rseq_scratch1]\n\t"
-			LONG_L " %[src], %[rseq_scratch0]\n\t",
-			cmpfail)
-#ifdef RSEQ_COMPARE_TWICE
-		RSEQ_ASM_DEFINE_CMPFAIL(6,
-			LONG_L " %[len], %[rseq_scratch2]\n\t"
-			LONG_L " %[dst], %[rseq_scratch1]\n\t"
-			LONG_L " %[src], %[rseq_scratch0]\n\t",
-			error1)
-		RSEQ_ASM_DEFINE_CMPFAIL(7,
-			LONG_L " %[len], %[rseq_scratch2]\n\t"
-			LONG_L " %[dst], %[rseq_scratch1]\n\t"
-			LONG_L " %[src], %[rseq_scratch0]\n\t",
-			error2)
-#endif
-		: /* gcc asm goto does not allow outputs */
-		: [cpu_id]		"r" (cpu),
-		  [current_cpu_id]	"m" (rseq_get_abi()->cpu_id),
-		  [rseq_cs]		"m" (rseq_get_abi()->rseq_cs.arch.ptr),
-		  /* final store input */
-		  [v]			"m" (*v),
-		  [expect]		"r" (expect),
-		  [newv]		"r" (newv),
-		  /* try memcpy input */
-		  [dst]			"r" (dst),
-		  [src]			"r" (src),
-		  [len]			"r" (len),
-		  [rseq_scratch0]	"m" (rseq_scratch[0]),
-		  [rseq_scratch1]	"m" (rseq_scratch[1]),
-		  [rseq_scratch2]	"m" (rseq_scratch[2])
-		  RSEQ_INJECT_INPUT
-		: "memory", "cc", "r0"
-		  RSEQ_INJECT_CLOBBER
-		: abort, cmpfail
-#ifdef RSEQ_COMPARE_TWICE
-		  , error1, error2
-#endif
-	);
-	rseq_after_asm_goto();
-	return 0;
-abort:
-	rseq_after_asm_goto();
-	RSEQ_INJECT_FAILED
-	return -1;
-cmpfail:
-	rseq_after_asm_goto();
-	return 1;
-#ifdef RSEQ_COMPARE_TWICE
-error1:
-	rseq_after_asm_goto();
-	rseq_bug("cpu_id comparison failed");
-error2:
-	rseq_after_asm_goto();
-	rseq_bug("expected value comparison failed");
-#endif
-}
+/* APIs which are not based on cpu ids. */
 
-/* s390 is TSO. */
-static inline __attribute__((always_inline))
-int rseq_cmpeqv_trymemcpy_storev_release(intptr_t *v, intptr_t expect,
-					 void *dst, void *src, size_t len,
-					 intptr_t newv, int cpu)
-{
-	return rseq_cmpeqv_trymemcpy_storev(v, expect, dst, src, len,
-					    newv, cpu);
-}
+#define RSEQ_TEMPLATE_CPU_ID_NONE
+#define RSEQ_TEMPLATE_MO_RELAXED
+#include "rseq-s390-bits.h"
+#undef RSEQ_TEMPLATE_MO_RELAXED
+#undef RSEQ_TEMPLATE_CPU_ID_NONE
-- 
2.25.1