Commit ae315738 authored by Mathieu Desnoyers's avatar Mathieu Desnoyers Committed by Peter Zijlstra
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selftests/rseq: x86: Template memory ordering and percpu access mode 



Introduce a rseq-x86-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.

This introduces changes to the rseq.h selftests API which require to
update the rseq selftest programs. Similar API/templating changes need
to be done for other architectures.

Signed-off-by: default avatarMathieu Desnoyers <mathieu.desnoyers@efficios.com>
Signed-off-by: default avatarPeter Zijlstra (Intel) <peterz@infradead.org>
Link: https://lore.kernel.org/r/20221122203932.231377-12-mathieu.desnoyers@efficios.com
parent 18c23558

tools/testing/selftests/rseq/compiler.h

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@@ -27,4 +27,10 @@ 
 */

#define rseq_after_asm_goto()	asm volatile ("" : : : "memory")



/* Combine two tokens. */

#define RSEQ__COMBINE_TOKENS(_tokena, _tokenb)	\

	_tokena##_tokenb

#define RSEQ_COMBINE_TOKENS(_tokena, _tokenb)	\

	RSEQ__COMBINE_TOKENS(_tokena, _tokenb)



#endif  /* RSEQ_COMPILER_H_ */

tools/testing/selftests/rseq/rseq-bits-reset.h

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/* SPDX-License-Identifier: LGPL-2.1 OR MIT */

/*

 * rseq-bits-reset.h

 *

 * (C) Copyright 2016-2022 - Mathieu Desnoyers <mathieu.desnoyers@efficios.com>

 */



#undef RSEQ_TEMPLATE_IDENTIFIER

#undef RSEQ_TEMPLATE_CPU_ID_FIELD

#undef RSEQ_TEMPLATE_CPU_ID_OFFSET

#undef RSEQ_TEMPLATE_SUFFIX

tools/testing/selftests/rseq/rseq-bits-template.h

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/* SPDX-License-Identifier: LGPL-2.1 OR MIT */

/*

 * rseq-bits-template.h

 *

 * (C) Copyright 2016-2022 - Mathieu Desnoyers <mathieu.desnoyers@efficios.com>

 */



#ifdef RSEQ_TEMPLATE_CPU_ID

# define RSEQ_TEMPLATE_CPU_ID_OFFSET	RSEQ_CPU_ID_OFFSET

# define RSEQ_TEMPLATE_CPU_ID_FIELD	cpu_id

# ifdef RSEQ_TEMPLATE_MO_RELEASE

#  define RSEQ_TEMPLATE_SUFFIX		_release_cpu_id

# elif defined (RSEQ_TEMPLATE_MO_RELAXED)

#  define RSEQ_TEMPLATE_SUFFIX		_relaxed_cpu_id

# else

#  error "Never use <rseq-bits-template.h> directly; include <rseq.h> instead."

# endif

#elif defined(RSEQ_TEMPLATE_MM_CID)

# define RSEQ_TEMPLATE_CPU_ID_OFFSET	RSEQ_MM_CID_OFFSET

# define RSEQ_TEMPLATE_CPU_ID_FIELD	mm_cid

# ifdef RSEQ_TEMPLATE_MO_RELEASE

#  define RSEQ_TEMPLATE_SUFFIX		_release_mm_cid

# elif defined (RSEQ_TEMPLATE_MO_RELAXED)

#  define RSEQ_TEMPLATE_SUFFIX		_relaxed_mm_cid

# else

#  error "Never use <rseq-bits-template.h> directly; include <rseq.h> instead."

# endif

#elif defined (RSEQ_TEMPLATE_CPU_ID_NONE)

# ifdef RSEQ_TEMPLATE_MO_RELEASE

#  define RSEQ_TEMPLATE_SUFFIX		_release

# elif defined (RSEQ_TEMPLATE_MO_RELAXED)

#  define RSEQ_TEMPLATE_SUFFIX		_relaxed

# else

#  error "Never use <rseq-bits-template.h> directly; include <rseq.h> instead."

# endif

#else

# error "Never use <rseq-bits-template.h> directly; include <rseq.h> instead."

#endif



#define RSEQ_TEMPLATE_IDENTIFIER(x)	RSEQ_COMBINE_TOKENS(x, RSEQ_TEMPLATE_SUFFIX)

tools/testing/selftests/rseq/rseq-x86-bits.h

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tools/testing/selftests/rseq/rseq-x86.h

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