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/* SPDX-License-Identifier: GPL-2.0-only */
#ifndef SELFTEST_KVM_SYSCALLS_H
#define SELFTEST_KVM_SYSCALLS_H
#include <sys/syscall.h>
#define MAP_ARGS0(m,...)
#define MAP_ARGS1(m,t,a,...) m(t,a)
#define MAP_ARGS2(m,t,a,...) m(t,a), MAP_ARGS1(m,__VA_ARGS__)
#define MAP_ARGS3(m,t,a,...) m(t,a), MAP_ARGS2(m,__VA_ARGS__)
#define MAP_ARGS4(m,t,a,...) m(t,a), MAP_ARGS3(m,__VA_ARGS__)
#define MAP_ARGS5(m,t,a,...) m(t,a), MAP_ARGS4(m,__VA_ARGS__)
#define MAP_ARGS6(m,t,a,...) m(t,a), MAP_ARGS5(m,__VA_ARGS__)
#define MAP_ARGS(n,...) MAP_ARGS##n(__VA_ARGS__)
#define __DECLARE_ARGS(t, a) t a
#define __UNPACK_ARGS(t, a) a
#define DECLARE_ARGS(nr_args, args...) MAP_ARGS(nr_args, __DECLARE_ARGS, args)
#define UNPACK_ARGS(nr_args, args...) MAP_ARGS(nr_args, __UNPACK_ARGS, args)
#define __KVM_SYSCALL_ERROR(_name, _ret) \
"%s failed, rc: %i errno: %i (%s)", (_name), (_ret), errno, strerror(errno)
/* Define a kvm_<syscall>() API to assert success. */
#define __KVM_SYSCALL_DEFINE(name, nr_args, args...) \
static inline void kvm_##name(DECLARE_ARGS(nr_args, args)) \
{ \
int r; \
\
r = name(UNPACK_ARGS(nr_args, args)); \
TEST_ASSERT(!r, __KVM_SYSCALL_ERROR(#name, r)); \
}
/*
* Macro to define syscall APIs, either because KVM selftests doesn't link to
* the standard library, e.g. libnuma, or because there is no library that yet
* provides the syscall. These
*/
#define KVM_SYSCALL_DEFINE(name, nr_args, args...) \
static inline long name(DECLARE_ARGS(nr_args, args)) \
{ \
return syscall(__NR_##name, UNPACK_ARGS(nr_args, args)); \
} \
__KVM_SYSCALL_DEFINE(name, nr_args, args)
/*
* Special case mmap(), as KVM selftest rarely/never specific an address,
* rarely specify an offset, and because the unique return code requires
* special handling anyways.
*/
static inline void *__kvm_mmap(size_t size, int prot, int flags, int fd,
off_t offset)
{
void *mem;
mem = mmap(NULL, size, prot, flags, fd, offset);
TEST_ASSERT(mem != MAP_FAILED, __KVM_SYSCALL_ERROR("mmap()",
(int)(unsigned long)MAP_FAILED));
return mem;
}
static inline void *kvm_mmap(size_t size, int prot, int flags, int fd)
{
return __kvm_mmap(size, prot, flags, fd, 0);
}
static inline int kvm_dup(int fd)
{
int new_fd = dup(fd);
TEST_ASSERT(new_fd >= 0, __KVM_SYSCALL_ERROR("dup()", new_fd));
return new_fd;
}
__KVM_SYSCALL_DEFINE(munmap, 2, void *, mem, size_t, size);
__KVM_SYSCALL_DEFINE(close, 1, int, fd);
__KVM_SYSCALL_DEFINE(fallocate, 4, int, fd, int, mode, loff_t, offset, loff_t, len);
__KVM_SYSCALL_DEFINE(ftruncate, 2, unsigned int, fd, off_t, length);
#endif /* SELFTEST_KVM_SYSCALLS_H */
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