Bulk pagetable unmap

Bulk pagetable unmap

[Mick Jordan]

Is it possible to use HYPERVISOR_mmu_update to unmap an area of the 
virtual address range and achieve the TLB update at the same time. I.e., 
a bulk version of:

    return HYPERVISOR_update_va_mapping(addr), val,
        (unsigned long)UVMF_ALL | UVMF_INVLPG);

Mick.

P.S. What happened to the developer manual for 3.3? The xen.org site 
only shows a user manual.

Re: Bulk pagetable unmap

[Mark Williamson]

I've only ever known this done by batching multiple hypercalls using a 
multicall - saves multiple Guest<->Xen transitions, which I assume is what you 
are aiming for?  Would that do for your purposes?

Cheers,
Mark

On Monday 09 March 2009 16:29:18 Mick Jordan wrote:
> Is it possible to use HYPERVISOR_mmu_update to unmap an area of the
> virtual address range and achieve the TLB update at the same time. I.e.,
> a bulk version of:
>
>     return HYPERVISOR_update_va_mapping(addr), val,
>         (unsigned long)UVMF_ALL | UVMF_INVLPG);
>
> Mick.
>
> P.S. What happened to the developer manual for 3.3? The xen.org site
> only shows a user manual.
>
>
> _______________________________________________
> Xen-devel mailing list
> Xen-devel@lists.xensource.com
> http://lists.xensource.com/xen-devel

Re: Bulk pagetable unmap

[Keir Fraser]

On 09/03/2009 16:29, "Mick Jordan" <Mick.Jordan@sun.com> wrote:

> Is it possible to use HYPERVISOR_mmu_update to unmap an area of the
> virtual address range and achieve the TLB update at the same time. I.e.,
> a bulk version of:
> 
>     return HYPERVISOR_update_va_mapping(addr), val,
>         (unsigned long)UVMF_ALL | UVMF_INVLPG);

You'll have to do a multicall of HYPERVISOR_mmu_update followed by
HYPERVISOR_mmuext_op.

> Mick.
> 
> P.S. What happened to the developer manual for 3.3? The xen.org site
> only shows a user manual.

There's no actively maintained developer manual.

 -- Keir