On 03/30/2015 04:16 PM, Marc Zyngier wrote: > On Mon, 30 Mar 2015 02:39:53 +0100 > AKASHI Takahiro <takahiro.akashi at linaro.org> wrote: > >> 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. > > ... which is consistent with what we're seeing here (data fault on > something that doesn't generate a load/store). I'm pretty sure the > page tables are screwed. > > Have you tested it with 64k pages? Hmm... It seems that I was able to reproduce the problem if 64k pages enabled. -Takahiro AKASHI > Thanks, > > M. >
