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

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Message-ID: <5518A969.3090707@linaro.org>
Date:	Mon, 30 Mar 2015 10:39:53 +0900
From:	AKASHI Takahiro <takahiro.akashi@...aro.org>
To:	Kyle McMartin <kmcmarti@...hat.com>,
	Marc Zyngier <marc.zyngier@....com>
CC:	Catalin Marinas <Catalin.Marinas@....com>,
	Will Deacon <Will.Deacon@....com>,
	Mark Rutland <Mark.Rutland@....com>,
	"linux-arm-kernel@...ts.infradead.org" 
	<linux-arm-kernel@...ts.infradead.org>,
	"linaro-kernel@...ts.linaro.org" <linaro-kernel@...ts.linaro.org>,
	"geoff@...radead.org" <geoff@...radead.org>,
	"kexec@...ts.infradead.org" <kexec@...ts.infradead.org>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	"broonie@...nel.org" <broonie@...nel.org>,
	"david.griego@...aro.org" <david.griego@...aro.org>,
	"christoffer.dall@...aro.org" <christoffer.dall@...aro.org>,
	"freddy77@...il.com" <freddy77@...il.com>
Subject: Re: [RFC v2 0/5] arm64: kvm: reset hyp context for kexec

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
>
--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/