From: Andrew Cooper <andrew.cooper3@citrix.com>
To: Boris Ostrovsky <boris.ostrovsky@oracle.com>, jbeulich@suse.com
Cc: xen-devel@lists.xen.org, roger.pau@citrix.com
Subject: Re: [PATCH v4] x86/HVM: Merge HVM and PVH hypercall tables
Date: Fri, 18 Dec 2015 21:24:27 +0000 [thread overview]
Message-ID: <5674798B.8020406@citrix.com> (raw)
In-Reply-To: <1450472960-5524-1-git-send-email-boris.ostrovsky@oracle.com>
On 18/12/2015 21:09, Boris Ostrovsky wrote:
> The tables are almost identical and therefore there is little reason to
> keep both sets.
>
> PVH needs 3 extra hypercalls:
> * mmuext_op. MMUEXT_PIN_L<x>_TABLE are required by control domain (dom0)
> when building guests. We add MMUEXT_UNPIN_TABLE for completeness.
> * platform_op. These are only available to privileged domains. We will
> (eventually) have privileged HVMlite guests and therefore shouldn't
> limit this to PVH only.
> * xenpmu_op. any guest with !has_vlapic() (i.e. PV, PVH and HVMlite)
> should be able to use it.
>
> Note that until recently PVH guests used mmuext_op's MMUEXT_INVLPG_MULTI and
> MMUEXT_TLB_FLUSH_MULTI commands but it has been determined that using the
> former was incorrect and using the latter is correct for now but is not
> guaranteed to work in the future.
>
> Signed-off-by: Boris Ostrovsky <boris.ostrovsky@oracle.com>
Reviewed-by: Andrew Cooper <andrew.cooper3@citrix.com>
prev parent reply other threads:[~2015-12-18 21:24 UTC|newest]
Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top
2015-12-18 21:09 [PATCH v4] x86/HVM: Merge HVM and PVH hypercall tables Boris Ostrovsky
2015-12-18 21:24 ` Andrew Cooper [this message]
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