From: gengdongjiu <gengdongjiu@huawei.com>
To: James Morse <james.morse@arm.com>
Cc: <christoffer.dall@linaro.org>, <marc.zyngier@arm.com>,
<rkrcmar@redhat.com>, <linux@armlinux.org.uk>,
<catalin.marinas@arm.com>, <will.deacon@arm.com>,
<lenb@kernel.org>, <robert.moore@intel.com>, <lv.zheng@intel.com>,
<mark.rutland@arm.com>, <xiexiuqi@huawei.com>,
<cov@codeaurora.org>, <david.daney@cavium.com>,
<suzuki.poulose@arm.com>, <stefan@hello-penguin.com>,
<Dave.Martin@arm.com>, <kristina.martsenko@arm.com>,
<wangkefeng.wang@huawei.com>, <tbaicar@codeaurora.org>,
<ard.biesheuvel@linaro.org>, <mingo@kernel.org>, <bp@suse.de>,
<shiju.jose@huawei.com>, <zjzhang@codeaurora.org>,
<linux-arm-kernel@lists.infradead.org>,
<kvmarm@lists.cs.columbia.edu>, <kvm@vger.kernel.org>,
<linux-kernel@vger.kernel.org>, <linux-acpi@vger.kernel.org>,
<devel@acpica.org>, <mst@redhat.com>, <john.garry@huawei.com>,
<jonathan.cameron@huawei.com>,
<shameerali.kolothum.thodi@huawei.com>,
<huangdaode@hisilicon.com>, <wangzhou1@hisilicon.com>,
<huangshaoyu@huawei.com>, <wuquanming@huawei.com>,
<linuxarm@huawei.com>, <zhengqiang10@huawei.com>
Subject: Re: [PATCH v6 5/7] arm64: kvm: route synchronous external abort exceptions to el2
Date: Thu, 14 Sep 2017 19:12:06 +0800 [thread overview]
Message-ID: <fb7da3e3-d0f7-7ac6-b088-888a563d7ee7@huawei.com> (raw)
In-Reply-To: <59B17449.6010201@arm.com>
James,
On 2017/9/8 0:31, James Morse wrote:
> KVM already handles external aborts from lower exception levels, no more work
> needs doing for TEA.
If it is firmware first solution, that is SCR_EL3.EA=1, all SError interrupt and synchronous External
Abort exceptions are taken to EL3, so EL3 firmware will handle it, KVM no needs to handle it.
HCR_EL3.TEA is only for EL3 to check its value to decide to jump to hypervisor or kernel.
>
> What happens when a guest access the RAS-Error-Record registers?
>
> Before we can set HCR_EL2.TERR I think we need to add some minimal emulation for
> the registers it traps. Most of them should be RAZ/WI, so it should be
> straightforward. (I think KVMs default is to emulate an undef for unknown traps).
Today I added the support to do some minimal emulation for RAS-Error-Record registers, thanks
for the good suggestion.
>
> Eventually we will want to back this with a page of memory that lets
> Qemu/kvmtool configure what the guest can see. (i.e. the emulated machine's
> errors for kernel-first handling.)
next prev parent reply other threads:[~2017-09-14 11:13 UTC|newest]
Thread overview: 41+ messages / expand[flat|nested] mbox.gz Atom feed top
2017-08-28 10:38 [PATCH v6 0/7] Add RAS virtualization support for SEA/SEI notification type in KVM Dongjiu Geng
2017-08-28 10:38 ` [PATCH v6 1/7] arm64: cpufeature: Detect CPU RAS Extentions Dongjiu Geng
2017-08-31 17:44 ` James Morse
2017-09-04 11:20 ` gengdongjiu
2017-08-28 10:38 ` [PATCH v6 2/7] KVM: arm64: Save ESR_EL2 on guest SError Dongjiu Geng
2017-08-28 10:38 ` [PATCH v6 3/7] acpi: apei: remove the unused code Dongjiu Geng
2017-08-31 17:50 ` James Morse
2017-09-04 11:43 ` gengdongjiu
2017-09-08 18:17 ` James Morse
2017-09-11 12:04 ` gengdongjiu
2017-09-14 12:35 ` James Morse
2017-09-14 12:51 ` gengdongjiu
2017-08-28 10:38 ` [PATCH v6 4/7] arm64: kvm: support user space to query RAS extension feature Dongjiu Geng
2017-08-31 18:04 ` James Morse
2017-09-05 7:18 ` gengdongjiu
2017-09-07 16:31 ` James Morse
2017-08-28 10:38 ` [PATCH v6 5/7] arm64: kvm: route synchronous external abort exceptions to el2 Dongjiu Geng
2017-09-07 16:31 ` James Morse
2017-09-13 8:12 ` gengdongjiu
2017-09-14 11:12 ` gengdongjiu [this message]
2017-09-14 12:36 ` James Morse
2017-10-16 11:44 ` James Morse
2017-10-16 13:44 ` gengdongjiu
2017-08-28 10:38 ` [PATCH v6 6/7] KVM: arm64: allow get exception information from userspace Dongjiu Geng
2017-09-07 16:30 ` James Morse
2017-09-13 7:32 ` gengdongjiu
2017-09-14 13:00 ` James Morse
2017-09-18 13:36 ` gengdongjiu
2017-09-22 16:39 ` James Morse
2017-09-21 7:55 ` gengdongjiu
2017-09-22 16:51 ` James Morse
2017-09-27 11:07 ` gengdongjiu
2017-09-27 15:37 ` gengdongjiu
2017-10-06 17:31 ` James Morse
2017-10-19 7:49 ` gengdongjiu
2017-08-28 10:38 ` [PATCH v6 7/7] arm64: kvm: handle SEI notification and pass the virtual syndrome Dongjiu Geng
2017-08-31 17:43 ` [PATCH v6 0/7] Add RAS virtualization support for SEA/SEI notification type in KVM James Morse
2017-09-04 11:10 ` gengdongjiu
2017-09-07 16:32 ` James Morse
2017-09-06 11:19 ` Peter Maydell
2017-09-06 11:29 ` gengdongjiu
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