Re: [Xen-devel] [PATCH v3 2/9] x86/np2m: flush all np2m objects on nested INVEPT

[George Dunlap <george.dunlap@xxxxxxxxxx>]

On 10/03/2017 04:20 PM, Sergey Dyasli wrote:
> At the moment, nvmx_handle_invept() updates the current np2m just to
> flush it.  Instead introduce a function, np2m_flush_base(), which will
> look up the np2m base pointer and call p2m_flush_table() instead.
> 
> Unfortunately, since we don't know which p2m a given vcpu is using, we
> must flush all p2ms that share that base pointer.
> 
> Convert p2m_flush_table() into p2m_flush_table_locked() in order not
> to release the p2m_lock after np2m_base check.
> 
> Signed-off-by: Sergey Dyasli <sergey.dyasli@xxxxxxxxxx>
> Signed-off-by: George Dunlap <george.dunlap@xxxxxxxxxx>
> ---
> v2 --> v3:
> - Commit message update
> ---
>  xen/arch/x86/hvm/vmx/vvmx.c |  7 +------
>  xen/arch/x86/mm/p2m.c       | 35 +++++++++++++++++++++++++++++------
>  xen/include/asm-x86/p2m.h   |  2 ++

This needs a VMX maintainer's Ack.

 -George

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