Re: [Xen-devel] [PATCH 0/3] Fix and cleanup for 32-bit PV sysexit

2015-11-19 Thread Borislav Petkov
On Wed, Nov 18, 2015 at 03:06:16PM -0500, Boris Ostrovsky wrote: > The first patch fixes Xen PV regression introduced by 32-bit rewrite. Unlike > the > earlier version it uses ALTERNATIVE instruction and avoids using xen_sysexit > (and sysret32 in compat mode) pv ops, as suggested by Andy. (I

[Xen-devel] [PATCH 0/3] Fix and cleanup for 32-bit PV sysexit

2015-11-18 Thread Boris Ostrovsky
The first patch fixes Xen PV regression introduced by 32-bit rewrite. Unlike the earlier version it uses ALTERNATIVE instruction and avoids using xen_sysexit (and sysret32 in compat mode) pv ops, as suggested by Andy. (I ended up patching TEST with XOR to avoid extra NOPs, even though I said