Re: [Xen-devel] [PATCH RFC 06/12] x86/vvmx: add stale_eptp flag

[George Dunlap <george.dunlap@xxxxxxxxxx>]

On 07/18/2017 11:34 AM, Sergey Dyasli wrote:
> The new variable will indicate if update of a shadow EPTP is needed

*element

> prior to vmentry. Update is required if a nested vcpu gets a new np2m
> or if its np2m was flushed by an IPI.
> 
> Helper function nvcpu_flush() is added.

Passive voice in this situation is to be avoided. :-)

We normally say something like, "Add nvcpu_flush() helper function."

> Signed-off-by: Sergey Dyasli <sergey.dyasli@xxxxxxxxxx>
> ---
>  xen/arch/x86/hvm/nestedhvm.c       |  1 +
>  xen/arch/x86/hvm/vmx/entry.S       |  6 ++++++
>  xen/arch/x86/hvm/vmx/vmx.c         |  8 +++++++-
>  xen/arch/x86/hvm/vmx/vvmx.c        | 15 +++++++++++++++
>  xen/arch/x86/mm/p2m.c              | 10 ++++++++--
>  xen/include/asm-x86/hvm/vmx/vvmx.h |  2 ++
>  6 files changed, 39 insertions(+), 3 deletions(-)
> 
> diff --git a/xen/arch/x86/hvm/nestedhvm.c b/xen/arch/x86/hvm/nestedhvm.c
> index 32b8acca6a..e9b1d8e628 100644
> --- a/xen/arch/x86/hvm/nestedhvm.c
> +++ b/xen/arch/x86/hvm/nestedhvm.c
> @@ -108,6 +108,7 @@ nestedhvm_flushtlb_ipi(void *info)
>       */
>      hvm_asid_flush_core();
>      vcpu_nestedhvm(v).nv_p2m = NULL;
> +    vcpu_2_nvmx(v).stale_eptp = true;

Looks like a vmx-specific function in common code?

 -George


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