On Wed, May 16, 2012 at 7:58 PM, Rusty Russell <rusty at rustcorp.com.au> wrote: > On Mon, 14 May 2012 18:57:20 -0400, Christoffer Dall <c.dall at virtualopensystems.com> wrote: >> On Thu, Mar 22, 2012 at 8:41 PM, Rusty Russell <rusty.russell at linaro.org> wrote: >> > As our emulation gets more sophisticated, we need to know what CPU model >> > we're dealing with. ?Particularly for some of the nastier workarounds. >> > >> > Let's start with Cortex A-15. ?We can then test the MIDR elsewhere in the >> > code, knowing that it's one of a finite set of allowed values. > > (Revisiting this now) > > The intent is good, this patch is not the right way to do it though. ?I > think want an explicit ioctl to tell the kernel what CPU; since the > kernel initialized the regs, it needs to know. > not sure of your point exactly, but if I understand correctly, what you're saying is that since the kernel initializes all the regs (at least it's going to) we want an ioctl to say "this is the cpu for which you will initialize the regs"? that also makes for a more friendly user space interface than "you need to set this register to this cryptic value to emulate this cpu"... -Christoffer
