linux-kernel - Re: [RFC PATCH v2 10/11] KVM: selftests: Add tests for virtual enumeration/mitigation MSRs

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Date:   Mon, 22 May 2023 17:39:41 +0800
From:   "Liu, Jingqi" <jingqi.liu@...el.com>
To:     Chao Gao <chao.gao@...el.com>, <kvm@...r.kernel.org>
CC:     Jiaan Lu <jiaan.lu@...el.com>, Paolo Bonzini <pbonzini@...hat.com>,
        "Shuah Khan" <shuah@...nel.org>,
        Arnaldo Carvalho de Melo <acme@...hat.com>,
        "Borislav Petkov" <bp@...e.de>,
        Pawan Gupta <pawan.kumar.gupta@...ux.intel.com>,
        "Zhang Chen" <chen.zhang@...el.com>,
        Daniel Sneddon <daniel.sneddon@...ux.intel.com>,
        <linux-kernel@...r.kernel.org>, <linux-kselftest@...r.kernel.org>
Subject: Re: [RFC PATCH v2 10/11] KVM: selftests: Add tests for virtual
 enumeration/mitigation MSRs

On 4/14/2023 2:25 PM, Chao Gao wrote:
> Three virtual MSRs added for guest to report the usage of software
Seems it's better like below.
s/Three virtual MSRs added/Add three virtual MSRs ?
> mitigations. They are enumerated in an architectural way. Try to
> access the three MSRs to ensure the behavior is expected:
> Specifically,
>
> 1. below three cases should cause #GP:
>   * access to a non-present MSR
>   * write to read-only MSRs
>   * toggling reserved bit of a writeable MSR
>
> 2. rdmsr/wrmsr in other cases should succeed
>
> 3. rdmsr should return the value last written
>
> Signed-off-by: Chao Gao <chao.gao@...el.com>
> ---
Thanks,
Jingqi