On Tue, 2016-26-07 at 08:06:01 UTC, Simon Guo wrote: > From: Simon Guo <wei.guo.si...@gmail.com> > > Normally, when MSR[VSX/VR/SPE] bits = 1, the used_vsr/used_vr/used_spe > bit have already been set. However signal frame locates at user space > and it is controlled by user application. It is up to kernel to make > sure used_vsr/used_vr/used_spe(in kernel)=1 and consistent with MSR > bits. > > For example, CRIU application, who utilizes sigreturn to restore > checkpointed process, will lead to the case where MSR[VSX] bit is > active in signal frame, but used_vsx bit is not set. (the same applies > to VR/SPE). > > This patch will reinforce this at kernel by always setting used_* bit > when MSR related bits are active in signal frame and we are doing > sigreturn. > > This patch is based on Ben's Proposal. > > Signed-off-by: Benjamin Herrenschmidt <b...@kernel.crashing.org> > Signed-off-by: Simon Guo <wei.guo.si...@gmail.com>
Applied to powerpc next, thanks. https://git.kernel.org/powerpc/c/e1c0d66fcb179a1737b3d5cc11 cheers
