public-mirrors/linux
1
0
Fork 0
mirror of git://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git synced 2025-08-05 16:54:27 +00:00
Code Issues Projects Releases Packages Wiki Activity Actions

selftests/rseq: Remove RSEQ_SKIP_FASTPATH code

Browse source 
This code is not currently build by the test Makefile, adds complexity,
and is not overall useful considering that the abort handling loops to
retry the fast-path.

Signed-off-by: Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Link: https://lore.kernel.org/r/20221122203932.231377-10-mathieu.desnoyers@efficios.com
This commit is contained in:
Mathieu Desnoyers 2022-11-22 15:39:11 -05:00 • committed by Peter Zijlstra
parent f7b01bb0b5
commit 72cb1d7f2f
9 changed files with 0 additions and 116 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

4
tools/testing/selftests/rseq/param_test.c
View file

@ -38,11 +38,7 @@ static int opt_yield, opt_signal, opt_sleep,
opt_disable_rseq, opt_threads = 200,
opt_disable_mod = 0, opt_test = 's', opt_mb = 0;
#ifndef RSEQ_SKIP_FASTPATH
static long long opt_reps = 5000;
#else
static long long opt_reps = 100;
#endif
static __thread __attribute__((tls_model("initial-exec")))
unsigned int signals_delivered;

6
tools/testing/selftests/rseq/rseq-arm.h
View file

@ -79,10 +79,6 @@ do { \
RSEQ_WRITE_ONCE(*p, v); \
} while (0)
#ifdef RSEQ_SKIP_FASTPATH
#include "rseq-skip.h"
#else /* !RSEQ_SKIP_FASTPATH */
#define __RSEQ_ASM_DEFINE_TABLE(label, version, flags, start_ip, \
post_commit_offset, abort_ip) \
".pushsection __rseq_cs, \"aw\"\n\t" \
@ -823,5 +819,3 @@ error2:
rseq_bug("expected value comparison failed");
#endif
}
#endif /* !RSEQ_SKIP_FASTPATH */

6
tools/testing/selftests/rseq/rseq-arm64.h
View file

@ -85,10 +85,6 @@ do { \
} \
} while (0)
#ifdef RSEQ_SKIP_FASTPATH
#include "rseq-skip.h"
#else /* !RSEQ_SKIP_FASTPATH */
#define RSEQ_ASM_TMP_REG32 "w15"
#define RSEQ_ASM_TMP_REG "x15"
#define RSEQ_ASM_TMP_REG_2 "x14"
@ -691,5 +687,3 @@ error2:
rseq_bug("expected value comparison failed");
#endif
}
#endif /* !RSEQ_SKIP_FASTPATH */

6
tools/testing/selftests/rseq/rseq-mips.h
View file

@ -60,10 +60,6 @@ do { \
RSEQ_WRITE_ONCE(*p, v); \
} while (0)
#ifdef RSEQ_SKIP_FASTPATH
#include "rseq-skip.h"
#else /* !RSEQ_SKIP_FASTPATH */
#if _MIPS_SZLONG == 64
# define LONG ".dword"
# define LONG_LA "dla"
@ -773,5 +769,3 @@ error2:
rseq_bug("expected value comparison failed");
#endif
}
#endif /* !RSEQ_SKIP_FASTPATH */

6
tools/testing/selftests/rseq/rseq-ppc.h
View file

@ -36,10 +36,6 @@ do { \
RSEQ_WRITE_ONCE(*p, v); \
} while (0)
#ifdef RSEQ_SKIP_FASTPATH
#include "rseq-skip.h"
#else /* !RSEQ_SKIP_FASTPATH */
/*
* The __rseq_cs_ptr_array and __rseq_cs sections can be used by debuggers to
* better handle single-stepping through the restartable critical sections.
@ -787,5 +783,3 @@ error2:
rseq_bug("expected value comparison failed");
#endif
}
#endif /* !RSEQ_SKIP_FASTPATH */

6
tools/testing/selftests/rseq/rseq-riscv.h
View file

@ -49,10 +49,6 @@ do { \
RSEQ_WRITE_ONCE(*(p), v); \
} while (0)
#ifdef RSEQ_SKIP_FASTPATH
#include "rseq-skip.h"
#else /* !RSEQ_SKIP_FASTPATH */
#define __RSEQ_ASM_DEFINE_TABLE(label, version, flags, start_ip, \
post_commit_offset, abort_ip) \
".pushsection __rseq_cs, \"aw\"\n" \
@ -673,5 +669,3 @@ error1:
rseq_bug("cpu_id comparison failed");
#endif
}
#endif /* !RSEQ_SKIP_FASTPATH */

5
tools/testing/selftests/rseq/rseq-s390.h
View file

@ -28,10 +28,6 @@ do { \
RSEQ_WRITE_ONCE(*p, v); \
} while (0)
#ifdef RSEQ_SKIP_FASTPATH
#include "rseq-skip.h"
#else /* !RSEQ_SKIP_FASTPATH */
#ifdef __s390x__
#define LONG_L "lg"
@ -607,4 +603,3 @@ int rseq_cmpeqv_trymemcpy_storev_release(intptr_t *v, intptr_t expect,
return rseq_cmpeqv_trymemcpy_storev(v, expect, dst, src, len,
newv, cpu);
}
#endif /* !RSEQ_SKIP_FASTPATH */

65
tools/testing/selftests/rseq/rseq-skip.h
View file

@ -1,65 +0,0 @@
/* SPDX-License-Identifier: LGPL-2.1 OR MIT */
/*
* rseq-skip.h
*
* (C) Copyright 2017-2018 - Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
*/
static inline __attribute__((always_inline))
int rseq_cmpeqv_storev(intptr_t *v, intptr_t expect, intptr_t newv, int cpu)
{
return -1;
}
static inline __attribute__((always_inline))
int rseq_cmpnev_storeoffp_load(intptr_t *v, intptr_t expectnot,
long voffp, intptr_t *load, int cpu)
{
return -1;
}
static inline __attribute__((always_inline))
int rseq_addv(intptr_t *v, intptr_t count, int cpu)
{
return -1;
}
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)
{
return -1;
}
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 -1;
}
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)
{
return -1;
}
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)
{
return -1;
}
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 -1;
}

12
tools/testing/selftests/rseq/rseq-x86.h
View file

@ -50,10 +50,6 @@ do { \
RSEQ_WRITE_ONCE(*p, v); \
} while (0)
#ifdef RSEQ_SKIP_FASTPATH
#include "rseq-skip.h"
#else /* !RSEQ_SKIP_FASTPATH */
#define __RSEQ_ASM_DEFINE_TABLE(label, version, flags, \
start_ip, post_commit_offset, abort_ip) \
".pushsection __rseq_cs, \"aw\"\n\t" \
@ -629,8 +625,6 @@ int rseq_cmpeqv_trymemcpy_storev_release(intptr_t *v, intptr_t expect,
newv, cpu);
}
#endif /* !RSEQ_SKIP_FASTPATH */
#elif defined(__i386__)
#define RSEQ_ASM_TP_SEGMENT %%gs
@ -657,10 +651,6 @@ do { \
RSEQ_WRITE_ONCE(*p, v); \
} while (0)
#ifdef RSEQ_SKIP_FASTPATH
#include "rseq-skip.h"
#else /* !RSEQ_SKIP_FASTPATH */
/*
* Use eax as scratch register and take memory operands as input to
* lessen register pressure. Especially needed when compiling in O0.
@ -1360,6 +1350,4 @@ error2:
#endif
}
#endif /* !RSEQ_SKIP_FASTPATH */
#endif