From: james.morse@arm•com (James Morse)
To: linux-arm-kernel@lists•infradead.org
Subject: [PATCH v6 5/7] arm64: kvm: route synchronous external abort exceptions to el2
Date: Mon, 16 Oct 2017 12:44:56 +0100 [thread overview]
Message-ID: <59E49BB8.8080801@arm.com> (raw)
In-Reply-To: <fb7da3e3-d0f7-7ac6-b088-888a563d7ee7@huawei.com>
Hi gengdongjiu,
On 14/09/17 12:12, gengdongjiu wrote:
> 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.
Where can I find this patch?
I'd like to repost it as part of the SError_rework/RAS/IESB series: this is one
of the bits KVM needs but I didn't touch as it looks like your updated version
of this patch should cover it.
Thanks,
James
next prev parent reply other threads:[~2017-10-16 11:44 UTC|newest]
Thread overview: 49+ 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
2017-09-08 14:34 ` 答复: " gengdongjiu
2017-09-08 15:03 ` Peter Maydell
2017-09-14 12:34 ` James Morse
2017-09-08 17:36 ` gengdongjiu
2017-09-14 12:38 ` 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
2017-09-14 12:36 ` James Morse
2017-10-16 11:44 ` James Morse [this message]
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
2017-09-25 15:13 ` 答复: " gengdongjiu
2017-10-06 16:46 ` James Morse
2017-10-19 5:48 ` gengdongjiu
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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