From mboxrd@z Thu Jan 1 00:00:00 1970 From: Peter Zijlstra Subject: Re: [PATCH v2 0/4] Remove 32-bit Xen PV guest support Date: Thu, 2 Jul 2020 10:18:27 +0200 Message-ID: <20200702081827.GA4781@hirez.programming.kicks-ass.net> References: <20200701110650.16172-1-jgross@suse.com> Mime-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Return-path: Content-Disposition: inline In-Reply-To: <20200701110650.16172-1-jgross@suse.com> List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: virtualization-bounces@lists.linux-foundation.org Sender: "Virtualization" To: Juergen Gross Cc: Stefano Stabellini , "VMware, Inc." , x86@kernel.org, linux-kernel@vger.kernel.org, virtualization@lists.linux-foundation.org, Ingo Molnar , Borislav Petkov , Andy Lutomirski , "H. Peter Anvin" , xen-devel@lists.xenproject.org, Thomas Gleixner , Boris Ostrovsky List-Id: virtualization@lists.linuxfoundation.org On Wed, Jul 01, 2020 at 01:06:46PM +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. Hooray!!! Much thanks!