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vhost-user: introduce virtio API

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Add virtio.c and virtio.h that define the functions needed
to manage virtqueues.

Signed-off-by: Laurent Vivier <lvivier@redhat.com>
This commit is contained in:
Laurent Vivier 2024-11-13 09:04:01 +01:00 • committed by Stefano Brivio
parent 8ac20f4795
commit 119b45358c
4 changed files with 859 additions and 2 deletions

9
util.h
View file

@ -144,7 +144,16 @@ static inline uint32_t ntohl_unaligned(const void *p)
return ntohl(val);
}
static inline void barrier(void) { __asm__ __volatile__("" ::: "memory"); }
#define smp_mb() do { barrier(); __atomic_thread_fence(__ATOMIC_SEQ_CST); } while (0)
#define smp_mb_release() do { barrier(); __atomic_thread_fence(__ATOMIC_RELEASE); } while (0)
#define smp_mb_acquire() do { barrier(); __atomic_thread_fence(__ATOMIC_ACQUIRE); } while (0)
#define smp_wmb() smp_mb_release()
#define smp_rmb() smp_mb_acquire()
#define NS_FN_STACK_SIZE (1024 * 1024) /* 1MiB */
int do_clone(int (*fn)(void *), char *stack_area, size_t stack_size, int flags,
void *arg);
#define NS_CALL(fn, arg) \