Re: [PATCH v3 06/13] x86/retpoline/xen: Convert Xen hypercall indirect jumps

[Juergen Gross]

On 04/01/18 15:37, David Woodhouse wrote:
> Convert indirect call in Xen hypercall to use non-speculative sequence,
> when CONFIG_RETPOLINE is enabled.
> 
> Signed-off-by: David Woodhouse <dwmw@xxxxxxxxxxxx>
> ---
>  arch/x86/include/asm/xen/hypercall.h | 5 +++--
>  1 file changed, 3 insertions(+), 2 deletions(-)
> 
> diff --git a/arch/x86/include/asm/xen/hypercall.h b/arch/x86/include/asm/xen/hypercall.h
> index 7cb282e9e587..393c0048c63e 100644
> --- a/arch/x86/include/asm/xen/hypercall.h
> +++ b/arch/x86/include/asm/xen/hypercall.h
> @@ -44,6 +44,7 @@
>  #include <asm/page.h>
>  #include <asm/pgtable.h>
>  #include <asm/smap.h>
> +#include <asm/nospec-branch.h>

Where does this file come from? It isn't added in any of the patches.


Juergen