Re: [Xen-devel] [PATCH 2/3] x86emul: deliver correct math exceptions

2016-10-04 Thread Andrew Cooper
On 04/10/16 14:39, Jan Beulich wrote: > #MF only applies to x87 instructions. SSE and AVX ones need #XM to be > raised instead, unless CR4.OSXMMEXCPT is clear, in which case #UD needs > to result. (But note that this is only a latent issue - we don't > emulate any instructions so far which could re

[Xen-devel] [PATCH 2/3] x86emul: deliver correct math exceptions

2016-10-04 Thread Jan Beulich
#MF only applies to x87 instructions. SSE and AVX ones need #XM to be raised instead, unless CR4.OSXMMEXCPT is clear, in which case #UD needs to result. (But note that this is only a latent issue - we don't emulate any instructions so far which could result in #XM.) Signed-off-by: Jan Beulich --