linux-kernel - Re: [PATCH v4] xen: support priv-mapping in an HVM tools domain

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Date:   Fri, 3 Nov 2017 16:51:56 -0400
From:   Boris Ostrovsky <boris.ostrovsky@...cle.com>
To:     Paul Durrant <paul.durrant@...rix.com>, x86@...nel.org,
        xen-devel@...ts.xenproject.org, linux-kernel@...r.kernel.org
Cc:     Juergen Gross <jgross@...e.com>,
        Thomas Gleixner <tglx@...utronix.de>,
        Ingo Molnar <mingo@...hat.com>,
        "H. Peter Anvin" <hpa@...or.com>
Subject: Re: [PATCH v4] xen: support priv-mapping in an HVM tools domain

On 11/03/2017 01:04 PM, Paul Durrant wrote:
> If the domain has XENFEAT_auto_translated_physmap then use of the PV-
> specific HYPERVISOR_mmu_update hypercall is clearly incorrect.
>
> This patch adds checks in xen_remap_domain_gfn_array() and
> xen_unmap_domain_gfn_array() which call through to the approprate
> xlate_mmu function if the feature is present. A check is also added
> to xen_remap_domain_gfn_range() to fail with -EOPNOTSUPP since this
> should not be used in an HVM tools domain.
>
> Signed-off-by: Paul Durrant <paul.durrant@...rix.com>

Reviewed-by: Boris Ostrovsky <boris.ostrovsky@...cle.com>