On Mon, Dec 10, 2018 at 07:41:53PM +0100, Borislav Petkov wrote: > On Mon, Dec 10, 2018 at 04:37:30PM -0200, Eduardo Habkost wrote: > > It isn't as simply as reverting commit 33b5e8c03ae7, but we can > > surely re-add RDTSCP on pc-*-4.0 and newer. > > Sure. If you could only point me to an example how to add that to > pc-*-4.0 and newer, I'll gladly cook up a patch and test it. > > > I thought we added documentation mentioning the minimum kernel > > version required by QEMU, but I can't find it. In either case, > > it seems reasonable to require Linux 4.5 or newer on newer > > machine-types. > > When you say "require" does that mean, one puts it in a text file > somewhere in the qemu sources or do we enforce it somehow? I mean documenting it. We already have code that will print warnings if a feature isn't available. See my previous attempt to document the minimum kernel version at <https://www.mail-archive.com/qemu-devel@xxxxxxxxxx/msg486559.html>. -- Eduardo
