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Date:   Thu, 23 Sep 2021 10:09:55 -0400
From:   Boris Ostrovsky <>
To:     Juergen Gross <>,,,
Cc:, Stefano Stabellini <>,
        Thomas Gleixner <>,
        Ingo Molnar <>, Borislav Petkov <>,
        "H. Peter Anvin" <>
Subject: Re: [PATCH v2 1/2] x86/xen: remove xen_have_vcpu_info_placement flag

On 9/23/21 12:44 AM, Juergen Gross wrote:
> Hmm, maybe I should have been more explicit saying that the hypercall
> was introduced in Xen 3.4, and only reason of failure is either an
> illegal vcpu, an invalid mapping specification, or a try to reissue the
> hypercall for a vcpu. None of those should ever happen.

That last sentence -- famous last words ;-) But yes, sure.

Assuming both patches adjust their commit messages and the typo

Reviewed-by: Boris Ostrovsky <>

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