aboutsummaryrefslogtreecommitdiffstatshomepage
path: root/tools/testing/selftests/rcutorture/formal/srcu-cbmc/src/percpu.h
diff options
context:
space:
mode:
Diffstat (limited to 'tools/testing/selftests/rcutorture/formal/srcu-cbmc/src/percpu.h')
-rw-r--r--tools/testing/selftests/rcutorture/formal/srcu-cbmc/src/percpu.h93
1 files changed, 0 insertions, 93 deletions
diff --git a/tools/testing/selftests/rcutorture/formal/srcu-cbmc/src/percpu.h b/tools/testing/selftests/rcutorture/formal/srcu-cbmc/src/percpu.h
deleted file mode 100644
index 27e67a3f291f..000000000000
--- a/tools/testing/selftests/rcutorture/formal/srcu-cbmc/src/percpu.h
+++ /dev/null
@@ -1,93 +0,0 @@
-/* SPDX-License-Identifier: GPL-2.0 */
-#ifndef PERCPU_H
-#define PERCPU_H
-
-#include <stddef.h>
-#include "bug_on.h"
-#include "preempt.h"
-
-#define __percpu
-
-/* Maximum size of any percpu data. */
-#define PERCPU_OFFSET (4 * sizeof(long))
-
-/* Ignore alignment, as CBMC doesn't care about false sharing. */
-#define alloc_percpu(type) __alloc_percpu(sizeof(type), 1)
-
-static inline void *__alloc_percpu(size_t size, size_t align)
-{
- BUG();
- return NULL;
-}
-
-static inline void free_percpu(void *ptr)
-{
- BUG();
-}
-
-#define per_cpu_ptr(ptr, cpu) \
- ((typeof(ptr)) ((char *) (ptr) + PERCPU_OFFSET * cpu))
-
-#define __this_cpu_inc(pcp) __this_cpu_add(pcp, 1)
-#define __this_cpu_dec(pcp) __this_cpu_sub(pcp, 1)
-#define __this_cpu_sub(pcp, n) __this_cpu_add(pcp, -(typeof(pcp)) (n))
-
-#define this_cpu_inc(pcp) this_cpu_add(pcp, 1)
-#define this_cpu_dec(pcp) this_cpu_sub(pcp, 1)
-#define this_cpu_sub(pcp, n) this_cpu_add(pcp, -(typeof(pcp)) (n))
-
-/* Make CBMC use atomics to work around bug. */
-#ifdef RUN
-#define THIS_CPU_ADD_HELPER(ptr, x) (*(ptr) += (x))
-#else
-/*
- * Split the atomic into a read and a write so that it has the least
- * possible ordering.
- */
-#define THIS_CPU_ADD_HELPER(ptr, x) \
- do { \
- typeof(ptr) this_cpu_add_helper_ptr = (ptr); \
- typeof(ptr) this_cpu_add_helper_x = (x); \
- typeof(*ptr) this_cpu_add_helper_temp; \
- __CPROVER_atomic_begin(); \
- this_cpu_add_helper_temp = *(this_cpu_add_helper_ptr); \
- __CPROVER_atomic_end(); \
- this_cpu_add_helper_temp += this_cpu_add_helper_x; \
- __CPROVER_atomic_begin(); \
- *(this_cpu_add_helper_ptr) = this_cpu_add_helper_temp; \
- __CPROVER_atomic_end(); \
- } while (0)
-#endif
-
-/*
- * For some reason CBMC needs an atomic operation even though this is percpu
- * data.
- */
-#define __this_cpu_add(pcp, n) \
- do { \
- BUG_ON(preemptible()); \
- THIS_CPU_ADD_HELPER(per_cpu_ptr(&(pcp), thread_cpu_id), \
- (typeof(pcp)) (n)); \
- } while (0)
-
-#define this_cpu_add(pcp, n) \
- do { \
- int this_cpu_add_impl_cpu = get_cpu(); \
- THIS_CPU_ADD_HELPER(per_cpu_ptr(&(pcp), this_cpu_add_impl_cpu), \
- (typeof(pcp)) (n)); \
- put_cpu(); \
- } while (0)
-
-/*
- * This will cause a compiler warning because of the cast from char[][] to
- * type*. This will cause a compile time error if type is too big.
- */
-#define DEFINE_PER_CPU(type, name) \
- char name[NR_CPUS][PERCPU_OFFSET]; \
- typedef char percpu_too_big_##name \
- [sizeof(type) > PERCPU_OFFSET ? -1 : 1]
-
-#define for_each_possible_cpu(cpu) \
- for ((cpu) = 0; (cpu) < NR_CPUS; ++(cpu))
-
-#endif