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SubjectRe: [PATCH v7 5/5] x86/xen: Add "nopv" support for HVM guest
On 7/11/19 8:02 AM, Zhenzhong Duan wrote:
> PVH guest needs PV extentions to work, so "nopv" parameter should be
> ignored for PVH but not for HVM guest.
> If PVH guest boots up via the Xen-PVH boot entry, xen_pvh is set early,
> we know it's PVH guest and ignore "nopv" parameter directly.
> If PVH guest boots up via the normal boot entry same as HVM guest, it's
> hard to distinguish PVH and HVM guest at that time. In this case, we
> have to panic early if PVH is detected and nopv is enabled to avoid a
> worse situation later.
> Move xen_platform_hvm() after xen_hvm_guest_late_init() to avoid compile
> error.
> Signed-off-by: Zhenzhong Duan <>
> Cc: Boris Ostrovsky <>
> Cc: Juergen Gross <>
> Cc: Stefano Stabellini <>
> Cc: Thomas Gleixner <>
> Cc: Ingo Molnar <>
> Cc: Borislav Petkov <>

Reviewed-by: Boris Ostrovsky <>

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