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Re: [RFC PATCH v3 12/36] i386/tdx: Add property sept-ve-disable for tdx-
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From: |
Isaku Yamahata |
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Subject: |
Re: [RFC PATCH v3 12/36] i386/tdx: Add property sept-ve-disable for tdx-guest object |
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Date: |
Thu, 24 Mar 2022 18:35:34 -0700 |
On Thu, Mar 24, 2022 at 10:37:25AM +0100,
Gerd Hoffmann <kraxel@redhat.com> wrote:
> > #VE can be triggered in various situations. e.g., CPUID on some leaves, and
> > RD/WRMSR on some MSRs. #VE on pending page is just one of the sources, Linux
> > just wants to disable this kind of #VE since it wants to prevent unexpected
> > #VE during SYSCALL gap.
>
> Linux guests can't disable those on their own? Requiring this being
> configured on the host looks rather fragile to me ...
Guest can get the attributes. (But can't change it). If the attributes isn't
what the guest expects, the guest can stop working itself.
--
Isaku Yamahata <isaku.yamahata@gmail.com>
- Re: [RFC PATCH v3 09/36] KVM: Introduce kvm_arch_pre_create_vcpu(), (continued)
- [RFC PATCH v3 10/36] i386/kvm: Move architectural CPUID leaf generation to separate helper, Xiaoyao Li, 2022/03/17
- [RFC PATCH v3 11/36] i386/tdx: Initialize TDX before creating TD vcpus, Xiaoyao Li, 2022/03/17
- [RFC PATCH v3 12/36] i386/tdx: Add property sept-ve-disable for tdx-guest object, Xiaoyao Li, 2022/03/17
- Re: [RFC PATCH v3 12/36] i386/tdx: Add property sept-ve-disable for tdx-guest object, Gerd Hoffmann, 2022/03/22
- Re: [RFC PATCH v3 12/36] i386/tdx: Add property sept-ve-disable for tdx-guest object, Xiaoyao Li, 2022/03/24
- Re: [RFC PATCH v3 12/36] i386/tdx: Add property sept-ve-disable for tdx-guest object, Gerd Hoffmann, 2022/03/24
- Re: [RFC PATCH v3 12/36] i386/tdx: Add property sept-ve-disable for tdx-guest object, Xiaoyao Li, 2022/03/24
- Re: [RFC PATCH v3 12/36] i386/tdx: Add property sept-ve-disable for tdx-guest object, Gerd Hoffmann, 2022/03/24
- Re: [RFC PATCH v3 12/36] i386/tdx: Add property sept-ve-disable for tdx-guest object, Xiaoyao Li, 2022/03/24
- Re: [RFC PATCH v3 12/36] i386/tdx: Add property sept-ve-disable for tdx-guest object,
Isaku Yamahata <=
[RFC PATCH v3 13/36] i386/tdx: Wire CPU features up with attributes of TD guest, Xiaoyao Li, 2022/03/17
[RFC PATCH v3 14/36] i386/tdx: Validate TD attributes, Xiaoyao Li, 2022/03/17
[RFC PATCH v3 16/36] i386/tdx: Set kvm_readonly_mem_enabled to false for TDX VM, Xiaoyao Li, 2022/03/17
[RFC PATCH v3 15/36] i386/tdx: Implement user specified tsc frequency, Xiaoyao Li, 2022/03/17
[RFC PATCH v3 17/36] pflash_cfi01/tdx: Introduce ram_mode of pflash for TDVF, Xiaoyao Li, 2022/03/17