Re: [Xen-devel] [v3][PATCH 09/16] tools/libxc: Expose new hypercall xc_reserved_device_memory_map

["Tian, Kevin" <kevin.tian@xxxxxxxxx>]

> From: Chen, Tiejun
> Sent: Thursday, June 11, 2015 9:15 AM
> 
> We will introduce the hypercall xc_reserved_device_memory_map
> approach to libxc. This helps us get rdm entry info according to
> different parameters. If flag == PCI_DEV_RDM_ALL, all entries
> should be exposed. Or we just expose that rdm entry specific to
> a SBDF.
> 
> Signed-off-by: Tiejun Chen <tiejun.chen@xxxxxxxxx>

Reviewed-by: Kevin Tian <kevin.tian@xxxxxxxxx>

> ---
>  tools/libxc/include/xenctrl.h |  8 ++++++++
>  tools/libxc/xc_domain.c       | 36
> ++++++++++++++++++++++++++++++++++++
>  2 files changed, 44 insertions(+)
> 
> diff --git a/tools/libxc/include/xenctrl.h b/tools/libxc/include/xenctrl.h
> index 50fa9e7..6c01362 100644
> --- a/tools/libxc/include/xenctrl.h
> +++ b/tools/libxc/include/xenctrl.h
> @@ -1326,6 +1326,14 @@ int xc_domain_set_memory_map(xc_interface *xch,
>  int xc_get_machine_memory_map(xc_interface *xch,
>                                struct e820entry entries[],
>                                uint32_t max_entries);
> +
> +int xc_reserved_device_memory_map(xc_interface *xch,
> +                                  uint32_t flag,
> +                                  uint16_t seg,
> +                                  uint8_t bus,
> +                                  uint8_t devfn,
> +                                  struct xen_reserved_device_memory 
> entries[],
> +                                  uint32_t *max_entries);
>  #endif
>  int xc_domain_set_time_offset(xc_interface *xch,
>                                uint32_t domid,
> diff --git a/tools/libxc/xc_domain.c b/tools/libxc/xc_domain.c
> index 1ff6d0a..4f96e1b 100644
> --- a/tools/libxc/xc_domain.c
> +++ b/tools/libxc/xc_domain.c
> @@ -684,6 +684,42 @@ int xc_domain_set_memory_map(xc_interface *xch,
> 
>      return rc;
>  }
> +
> +int xc_reserved_device_memory_map(xc_interface *xch,
> +                                  uint32_t flag,
> +                                  uint16_t seg,
> +                                  uint8_t bus,
> +                                  uint8_t devfn,
> +                                  struct xen_reserved_device_memory 
> entries[],
> +                                  uint32_t *max_entries)
> +{
> +    int rc;
> +    struct xen_reserved_device_memory_map xrdmmap = {
> +        .flag = flag,
> +        .seg = seg,
> +        .bus = bus,
> +        .devfn = devfn,
> +        .nr_entries = *max_entries
> +    };
> +    DECLARE_HYPERCALL_BOUNCE(entries,
> +                             sizeof(struct xen_reserved_device_memory) *
> +                             *max_entries, XC_HYPERCALL_BUFFER_BOUNCE_OUT);
> +
> +    if ( xc_hypercall_bounce_pre(xch, entries) )
> +        return -1;
> +
> +    set_xen_guest_handle(xrdmmap.buffer, entries);
> +
> +    rc = do_memory_op(xch, XENMEM_reserved_device_memory_map,
> +                      &xrdmmap, sizeof(xrdmmap));
> +
> +    xc_hypercall_bounce_post(xch, entries);
> +
> +    *max_entries = xrdmmap.nr_entries;
> +
> +    return rc;
> +}
> +
>  int xc_get_machine_memory_map(xc_interface *xch,
>                                struct e820entry entries[],
>                                uint32_t max_entries)
> --
> 1.9.1


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