Re: AMD DC graphics display code enables -mhard-float, -msse, -msse2 without any visible FPU state protection

2020-04-02 Thread Thomas Gleixner
Jann Horn writes: > On Thu, Apr 2, 2020 at 9:34 AM Christian König > wrote: >> Am 02.04.20 um 04:34 schrieb Jann Horn: >> > [x86 folks in CC so that they can chime in on the precise rules for >> > this stuff] They are pretty simple. Any code using FPU needs to be completely isolated from regul

Re: [PATCH RFC PKS/PMEM 05/58] kmap: Introduce k[un]map_thread

2020-11-10 Thread Thomas Gleixner
Ira, On Fri, Oct 09 2020 at 12:49, ira weiny wrote: > From: Ira Weiny > > To correctly support the semantics of kmap() with Kernel protection keys > (PKS), kmap() may be required to set the protections on multiple > processors (globally). Enabling PKS globally can be very expensive > depending o

Re: [PATCH RFC PKS/PMEM 05/58] kmap: Introduce k[un]map_thread

2020-11-10 Thread Thomas Gleixner
On Mon, Nov 09 2020 at 20:59, Ira Weiny wrote: > On Tue, Nov 10, 2020 at 02:13:56AM +0100, Thomas Gleixner wrote: > Also, we can convert the new memcpy_*_page() calls to kmap_local() as well. > [For now my patch just uses kmap_atomic().] > > I've not looked at all of the pa

RE: [PATCH v3 1/2] cpu/smt: add a notifier to notify the SMT changes

2023-03-31 Thread Thomas Gleixner
On Fri, Mar 31 2023 at 05:49, WenYou Yang wrote: Removing pointlessly copied mail headers. Please fix your email client >> > >> > So what do you want to have happen when someone goes and manually >> > offlines all the SMT siblings using >> > /sys/devices/system/cpu/cpu*/online >