On Fri, Oct 12, 2012 at 7:17 PM, Paulo Zanoni <przanoni at gmail.com> wrote: > Ok, so please do a final test: try to write something to those > "must-be-preserved" bits and check if the values stay or not. If after > writing 1 to bits 17-18, 20-23 you read 0, then you have my > Reviewed-by: Paulo Zanoni <paulo.r.zanoni at intel.com>. I still do plan > to test the 6 patches of the series on hsw later btw. I've tested a few bits on a few machines, and some do stick and some cause ... strange things (like a seemingly random set of other register bits also being set). I guess that's not the answer you've been looking for. I'd still prefer if we just try to clear things, worst case we can easily read out the current state of these reserved bits at boot up and restore them at resume time. But I'd really prefer if we reduce our reliance on the boot-up state from the bios as much as possible. And in this case here the only way to figure things out is to merge it (it's really early for 3.8 anyway) and see what happens. Cheers, Daniel -- Daniel Vetter Software Engineer, Intel Corporation +41 (0) 79 365 57 48 - http://blog.ffwll.ch
