>>> On 13.02.17 at 16:33, <andrew.coop...@citrix.com> wrote: > On 13/02/17 15:30, Jan Beulich wrote: >>>>> On 13.02.17 at 16:26, <andrew.coop...@citrix.com> wrote: >>> On 13/02/17 15:19, Jan Beulich wrote: >>>>>>> On 13.02.17 at 15:32, <andrew.coop...@citrix.com> wrote: >>>>> Xen's choice of the MSR_STAR value is constant across all pcpus. >>>>> Introduce a >>>>> new define and use it to avoid the opencoding in >>>>> subarch_percpu_traps_init() >>>>> and restore_rest_processor_state(). >>>>> >>>>> Despite Intel hardware having an MSR_CSTAR register, nothing actually >>>>> uses it >>>>> as the SYSCALL instruction raises #UD out of 64bit mode, meaning that >>>> Did you mean "32-bit"? >>> SYSCALL on Intel will #UD if CS.L == 0, so you can't even use it from a >>> compatability mode segment. >> Right - so my comment stands. Or did you mean "outside of 64-bit >> mode"? > > I did, but I don't see how that is meaningfully different from what I wrote.
Interesting, you'll have to correct my English understanding then: "out of <something>" to me so far meant originating in <something>, quite the opposite of "outside of <something>". Jan _______________________________________________ Xen-devel mailing list Xen-devel@lists.xen.org https://lists.xen.org/xen-devel
