Re: [Qemu-devel] [PATCH] x86: Implement SMEP and SMAP

2012-09-26 Thread Anthony Liguori
"H. Peter Anvin" writes: > From: "H. Peter Anvin" > > This patch implements Supervisor Mode Execution Prevention (SMEP) and > Supervisor Mode Access Prevention (SMAP) for x86. The purpose of the > patch, obviously, is to help kernel developers debug the support for > those features. > > A fair

Re: [Qemu-devel] [PATCH] x86: Implement SMEP and SMAP

2012-09-26 Thread H. Peter Anvin
On 09/26/2012 12:50 PM, Anthony Liguori wrote: > > The patch looks good except for these two chunks. This would break live > migration from a new QEMU to an old one because CPUs are currently not > versioned. > > If you just remove these two chunks, the patch can be applied and you > can still t