From mboxrd@z Thu Jan  1 00:00:00 1970
From: takahiro.akashi@linaro.org (AKASHI Takahiro)
Date: Mon, 30 Mar 2015 10:39:53 +0900
Subject: [RFC v2 0/5] arm64: kvm: reset hyp context for kexec
In-Reply-To: <20150327174044.GL12400@redacted.bos.redhat.com>
References: <1427358326-3708-1-git-send-email-takahiro.akashi@linaro.org>
 <20150327153131.GK12400@redacted.bos.redhat.com> <55157920.3050003@arm.com>
 <20150327174044.GL12400@redacted.bos.redhat.com>
Message-ID: <5518A969.3090707@linaro.org>
To: linux-arm-kernel@lists.infradead.org
List-Id: linux-arm-kernel.lists.infradead.org

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
>