Re: [Xen-devel] [v2 07/16] xen/arm: Introduce copy_to_guest_phys_flush_dcache

[Stefano Stabellini <sstabellini@xxxxxxxxxx>]

On Tue, 12 Dec 2017, Julien Grall wrote:
> This new function will be used in a follow-up patch to copy data to the guest
> using the IPA (aka guest physical address) and then clean the cache.
> 
> Signed-off-by: Julien Grall <julien.grall@xxxxxxxxxx>

Reviewed-by: Stefano Stabellini <sstabellini@xxxxxxxxxx>


> ---
>     Changes in v2:
>         - Use the new interface
> ---
>  xen/arch/arm/guestcopy.c           | 9 +++++++++
>  xen/include/asm-arm/guest_access.h | 6 ++++++
>  2 files changed, 15 insertions(+)
> 
> diff --git a/xen/arch/arm/guestcopy.c b/xen/arch/arm/guestcopy.c
> index 93e4aa2d3f..7a0f3e9d5f 100644
> --- a/xen/arch/arm/guestcopy.c
> +++ b/xen/arch/arm/guestcopy.c
> @@ -130,6 +130,15 @@ unsigned long raw_copy_from_guest(void *to, const void 
> __user *from, unsigned le
>                        COPY_from_guest | COPY_linear);
>  }
>  
> +unsigned long copy_to_guest_phys_flush_dcache(struct domain *d,
> +                                              paddr_t gpa,
> +                                              void *buf,
> +                                              unsigned int len)
> +{
> +    return copy_guest(buf, gpa, len, GPA_INFO(d),
> +                      COPY_to_guest | COPY_ipa | COPY_flush_dcache);
> +}
> +
>  int access_guest_memory_by_ipa(struct domain *d, paddr_t gpa, void *buf,
>                                 uint32_t size, bool is_write)
>  {
> diff --git a/xen/include/asm-arm/guest_access.h 
> b/xen/include/asm-arm/guest_access.h
> index 6796801cfe..224d2a033b 100644
> --- a/xen/include/asm-arm/guest_access.h
> +++ b/xen/include/asm-arm/guest_access.h
> @@ -11,6 +11,12 @@ unsigned long raw_copy_to_guest_flush_dcache(void *to, 
> const void *from,
>  unsigned long raw_copy_from_guest(void *to, const void *from, unsigned len);
>  unsigned long raw_clear_guest(void *to, unsigned len);
>  
> +/* Copy data to guest physical address, then clean the region. */
> +unsigned long copy_to_guest_phys_flush_dcache(struct domain *d,
> +                                              paddr_t phys,
> +                                              void *buf,
> +                                              unsigned int len);
> +
>  int access_guest_memory_by_ipa(struct domain *d, paddr_t ipa, void *buf,
>                                 uint32_t size, bool is_write);
>  
> -- 
> 2.11.0
> 

_______________________________________________
Xen-devel mailing list
Xen-devel@xxxxxxxxxxxxxxxxxxxx
https://lists.xenproject.org/mailman/listinfo/xen-devel