Re: [RFC v2 0/5] arm64: kvm: reset hyp context for kexec

[AKASHI Takahiro]

On 03/28/2015 02:40 AM, Kyle McMartin wrote:
> On Fri, Mar 27, 2015 at 03:37:04PM +0000, Marc Zyngier wrote:
> > > [  236.260863] Kernel panic - not syncing: HYP panic:
> > > [  236.260863] PS:600003c9 PC:000003ffffff0830 ESR:0000000096000006
> >
> > It would be interesting if you could find out what you have at offset
> > 0x830 of hyp-init.o (the stack trace is for EL1, and is not going to
> > help much).
>
> Given the alignment, i'm going to assume i'm looking at the right thing:
>
> 0000000000000820 <__kvm_hyp_reset>:
>       820:       d51c2000        msr     ttbr0_el2, x0
>       824:       d5033fdf        isb
>       828:       d50c871f        tlbi    alle2
>       82c:       d5033f9f        dsb     sy
>       830:       10000060        adr     x0, 83c <__kvm_hyp_reset+0x1c>
>       834:       b3403c01        bfxil   x1, x0, #0, #16
>       838:       d61f0020        br      x1
>       83c:       d53c1000        mrs     x0, sctlr_el2
>
> but it seems fairly implausible to be trapping on ADR x0, 1f...


I've never seen this panic on fast model...

ESR shows that
  - Exception class: Data abort taken without a change in Exception level
  - Data fault status code: Translation fault at EL2

and FAR seems not to be a proper address.

-Takahiro AKASHI

> --Kyle
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