Re: XSAVEOPT

2012-07-09 Thread Konstantin Belousov
On Mon, Jul 09, 2012 at 11:24:52AM -0400, John Baldwin wrote: > On Sunday, July 08, 2012 11:02:25 am Konstantin Belousov wrote: > > Please find at > > http://people.freebsd.org/~kib/misc/xsaveopt.1.patch > > a patch to finally add suport for using XSAVEOPT for our amd64 co

Re: XSAVEOPT

2012-07-09 Thread John Baldwin
On Sunday, July 08, 2012 11:02:25 am Konstantin Belousov wrote: > Please find at > http://people.freebsd.org/~kib/misc/xsaveopt.1.patch > a patch to finally add suport for using XSAVEOPT for our amd64 context > switch code. See Intel SDM for description of the XSAVEOPT instruction. >

XSAVEOPT

2012-07-08 Thread Konstantin Belousov
Please find at http://people.freebsd.org/~kib/misc/xsaveopt.1.patch a patch to finally add suport for using XSAVEOPT for our amd64 context switch code. See Intel SDM for description of the XSAVEOPT instruction. Summary is that the instruction allows to not write parts of the FPU state which was