On Wed, 2009-02-04 at 09:54 -0600, Serge E. Hallyn wrote:
> Quoting Benjamin Herrenschmidt (b...@kernel.crashing.org):
> >
> > > +struct cr_hdr_cpu {
> > > + struct pt_regs pt_regs;
> > > + /* relevant fields from thread_struct */
> > > + double fpr[32][TS_FPRWIDTH];
> > > + unsigned int fpscr;
> > > + int fpexc_mode;
> > > + /* unsigned int align_ctl; this is never updated? */
> > > + unsigned long dabr;
> > > +};
> >
> > Is there some version or other identification somewhere ? If not there
> > should be. ie, we're going to add things here. For example, what about
> > the vector registers ? Also, some CPUs will have more HW debug registers
> > than just the DABR (we plan to add support for all the BookE architected
> > IACs and DACs for example), etc...
>
> The arch-independent checkpoint header does have kernel
> maj:min:rev:patch info. We expect to have to do more,
> assuming that the .config can change the arch-dependent
> cpu header (i.e. perhaps TS_FPRWIDTH could be changed).
It could to a certain extent... things like VSX, VSR, or freescale SPE,
or even the Cell SPU state etc....
I wonder if we want a tagged structure so we can easily add things...
Ben.
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