Re: [PATCH v2] libs/foreignmemory: Implement on NetBSD

[Andrew Cooper <andrew.cooper3@xxxxxxxxxx>]

On 26/01/2021 22:47, Manuel Bouyer wrote:
> diff --git a/tools/libs/foreignmemory/netbsd.c 
> b/tools/libs/foreignmemory/netbsd.c
> index 54a418ebd6..a7e1d72ffc 100644
> --- a/tools/libs/foreignmemory/netbsd.c
> +++ b/tools/libs/foreignmemory/netbsd.c
> @@ -97,7 +102,48 @@ void *osdep_map_foreign_batch(xenforeignmem_handle *fmem, 
> uint32_t dom,
>  int osdep_xenforeignmemory_unmap(xenforeignmemory_handle *fmem,
>                                   void *addr, size_t num)
>  {
> -    return munmap(addr, num*XC_PAGE_SIZE);
> +    return munmap(addr, num*PAGE_SIZE);
> +}
> +
> +int osdep_xenforeignmemory_restrict(xenforeignmemory_handle *fmem,
> +                                    domid_t domid)
> +{
> +    errno = EOPNOTSUPP;
> +    return -1;
> +}
> +
> +int osdep_xenforeignmemory_unmap_resource(
> +    xenforeignmemory_handle *fmem, xenforeignmemory_resource_handle *fres)
> +{
> +    return fres ? munmap(fres->addr, fres->nr_frames << PAGE_SHIFT) : 0;
> +}
> +
> +int osdep_xenforeignmemory_map_resource(
> +    xenforeignmemory_handle *fmem, xenforeignmemory_resource_handle *fres)
> +{
> +    privcmd_mmap_resource_t mr = {
> +        .dom = fres->domid,
> +        .type = fres->type,
> +        .id = fres->id,
> +        .idx = fres->frame,
> +        .num = fres->nr_frames,
> +    };
> +    int rc;
> +
> +    fres->addr = mmap(fres->addr, fres->nr_frames << PAGE_SHIFT,
> +                      fres->prot, fres->flags | MAP_ANON | MAP_SHARED, -1, 
> 0);
> +    if ( fres->addr == MAP_FAILED )
> +        return -1;
> +
> +    mr.addr = (uintptr_t)fres->addr;
> +
> +    rc = ioctl(fmem->fd, IOCTL_PRIVCMD_MMAP_RESOURCE, &mr);
> +    if ( rc )
> +    {
> +        PERROR("ioctl failed");

return -1;

I was rebasing my resource_size fix over this patch.

It would be easiest for me if I fix up and commit this patch, if
everyone is happy with that.

~Andrew