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

[Andrew Cooper <andrew.cooper3@citrix.com>]

On 28/01/2021 10:52, Andrew Cooper wrote:
> 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.

FAOD I've committed a fixed up version of this patch as discussed.

~Andrew