From: Will Deacon <will.deacon@arm.com>
To: Wei Xu <xuwei5@hisilicon.com>
Cc: James Morse <james.morse@arm.com>,
catalin.marinas@arm.com, suzuki.poulose@arm.com,
dave.martin@arm.com, mark.rutland@arm.com, marc.zyngier@arm.com,
linux-arm-kernel@lists.infradead.org,
linux-kernel@vger.kernel.org, Linuxarm <linuxarm@huawei.com>,
Hanjun Guo <guohanjun@huawei.com>,
xiexiuqi@huawei.com, huangdaode <huangdaode@hisilicon.com>,
"Chenxin (Charles)" <charles.chenxin@huawei.com>,
"Xiongfanggou (James)" <james.xiong@huawei.com>,
"Liguozhu (Kenneth)" <liguozhu@hisilicon.com>,
Zhangyi ac <zhangyi.ac@huawei.com>,
jonathan.cameron@huawei.com,
Shameerali Kolothum Thodi <shameerali.kolothum.thodi@huawei.com>,
John Garry <john.garry@huawei.com>,
Salil Mehta <salil.mehta@huawei.com>,
Shiju Jose <shiju.jose@huawei.com>,
"Zhuangyuzeng (Yisen)" <yisen.zhuang@huawei.com>,
"Wangzhou (B)" <wangzhou1@hisilicon.com>,
"kongxinwei (A)" <kong.kongxinwei@hisilicon.com>,
"Liyuan (Larry, Turing Solution)" <Larry.T@huawei.com>,
libeijian@hisilicon.com
Subject: Re: KVM guest sometimes failed to boot because of kernel stack overflow if KPTI is enabled on a hisilicon ARM64 platform.
Date: Wed, 20 Jun 2018 17:28:45 +0100 [thread overview]
Message-ID: <20180620162845.GD27776@arm.com> (raw)
In-Reply-To: <5B2A7FE1.5040607@hisilicon.com>
On Thu, Jun 21, 2018 at 12:25:05AM +0800, Wei Xu wrote:
> Hi James,
>
> On 2018/6/20 23:54, James Morse wrote:
> >Hi Wei,
> >
> >On 20/06/18 16:52, Wei Xu wrote:
> >>On 2018/6/20 22:42, Will Deacon wrote:
> >>>Hmm, I wonder if this is at all related to RAS, since we've just enabled
> >>>that and if we take a fault whilst rewriting swapper then we're going to
> >>>get stuck. What happens if you set CONFIG_ARM64_RAS_EXTN=n in the guest?
> >>I will try it now.
> >It's not just the Kconfig symbol, could you also revert:
> >
> >f751daa4f9d3 ("arm64: Unconditionally enable IESB on exception entry/return for
> >firmware-first")
> >
> >
> >(reverts and build cleanly on 4.17)
>
> Thanks to point out this!
> I have disabled CONFIG_ARM64_RAS_EXTN and reverted that commit.
> But I still got the stack overflow issue sometimes.
> Do you have more hint?
[...]
> [ 0.076797] pstate: 604003c5 (nZCv DAIF +PAN -UAO)
> [ 0.081727] pc : el1_sync+0x0/0xb0
> [ 0.085217] lr : kpti_install_ng_mappings+0x120/0x214
Please run:
$ ./scripts/faddr2line vmlinux kpti_install_ng_mappings+0x120/0x214
as the GDB output wasn't helpful (it only showed local variable
declarations?!).
Will
next prev parent reply other threads:[~2018-06-20 16:28 UTC|newest]
Thread overview: 39+ messages / expand[flat|nested] mbox.gz Atom feed top
2018-06-20 14:18 KVM guest sometimes failed to boot because of kernel stack overflow if KPTI is enabled on a hisilicon ARM64 platform Wei Xu
2018-06-20 14:42 ` Will Deacon
2018-06-20 15:52 ` Wei Xu
2018-06-20 15:54 ` James Morse
2018-06-20 16:25 ` Wei Xu
2018-06-20 16:28 ` Will Deacon [this message]
2018-06-20 16:33 ` Wei Xu
2018-06-21 8:38 ` James Morse
2018-06-21 9:00 ` Marc Zyngier
2018-06-21 9:18 ` Will Deacon
2018-06-21 10:14 ` Wei Xu
2018-06-21 10:54 ` Will Deacon
2018-06-22 8:33 ` Wei Xu
2018-06-22 9:23 ` Will Deacon
2018-06-22 10:45 ` Wei Xu
2018-06-22 11:16 ` Will Deacon
2018-06-22 13:18 ` Wei Xu
2018-06-22 13:31 ` Will Deacon
2018-06-22 13:46 ` Wei Xu
2018-06-22 14:43 ` Will Deacon
2018-06-22 15:26 ` Wei Xu
2018-06-22 14:28 ` Mark Rutland
2018-06-22 15:28 ` Wei Xu
2018-06-22 15:41 ` Will Deacon
2018-06-22 16:02 ` Wei Xu
2018-06-21 9:20 ` Wei Xu
2018-06-26 17:16 ` Wei Xu
2018-06-26 17:47 ` Will Deacon
2018-06-27 8:39 ` James Morse
2018-06-27 13:26 ` Wei Xu
2018-06-28 8:45 ` James Morse
2018-06-28 10:20 ` Wei Xu
2018-06-27 13:22 ` Wei Xu
2018-06-27 13:28 ` Will Deacon
2018-06-27 13:32 ` Wei Xu
2018-06-28 14:50 ` Wei Xu
2018-06-28 15:34 ` Mark Rutland
[not found] ` <etPan.5b3507f7.914aa16.1d6b@localhost>
2018-06-28 16:24 ` 答复: " Mark Rutland
2018-06-29 9:59 ` Mark Rutland
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