linux-kernel - Re: [PATCH 0/2] Remove 32-bit Xen PV guest support

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Date:   Mon, 15 Jul 2019 14:36:37 +0200
From:   Juergen Gross <jgross@...e.com>
To:     Peter Zijlstra <peterz@...radead.org>
Cc:     Borislav Petkov <bp@...en8.de>, Andy Lutomirski <luto@...nel.org>,
        Stefano Stabellini <sstabellini@...nel.org>, x86@...nel.org,
        Thomas Gleixner <tglx@...utronix.de>,
        virtualization@...ts.linux-foundation.org,
        xen-devel@...ts.xenproject.org,
        Boris Ostrovsky <boris.ostrovsky@...cle.com>,
        Ingo Molnar <mingo@...hat.com>, linux-kernel@...r.kernel.org,
        Alok Kataria <akataria@...are.com>,
        "H. Peter Anvin" <hpa@...or.com>
Subject: Re: [PATCH 0/2] Remove 32-bit Xen PV guest support

On 15.07.19 14:32, Peter Zijlstra wrote:
> On Mon, Jul 15, 2019 at 01:37:37PM +0200, Juergen Gross wrote:
>> The long term plan has been to replace Xen PV guests by PVH. The first
>> victim of that plan are now 32-bit PV guests, as those are used only
>> rather seldom these days. Xen on x86 requires 64-bit support and with
>> Grub2 now supporting PVH officially since version 2.04 there is no
>> need to keep 32-bit PV guest support alive in the Linux kernel.
>> Additionally Meltdown mitigation is not available in the kernel running
>> as 32-bit PV guest, so dropping this mode makes sense from security
>> point of view, too.
>>
>> Juergen Gross (2):
>>    x86/xen: remove 32-bit Xen PV guest support
>>    x86/paravirt: remove 32-bit support from PARAVIRT_XXL
> 
> Hooray!
> 

Always a pleasure to cheer the community up by sending Xen patches. :-D


Juergen