From: Paolo Bonzini <pbonzini@redhat.com>
To: kvm@vger.kernel.org, linux-kernel@vger.kernel.org,
rkrcmar@redhat.com, ravi.sahita@intel.com
Subject: Re: [PATCH RFC 00/10] Intel EPT-Based Sub-page Write Protection Support.
Date: Sat, 4 Nov 2017 17:54:20 +0100 [thread overview]
Message-ID: <b99bcf08-5a4a-1931-3fe3-a8747c38f5b1@redhat.com> (raw)
In-Reply-To: <20171104001243.GA81548@dazhang1-ssd.sh.intel.com>
On 04/11/2017 01:12, Yi Zhang wrote:
>>
> Adding Ravi,
>
> Does anyone have further comments on current implementation, it is a
> important feature in our next generation chip-set.
What matters is not the feature, but the use case; without a use case,
there is no point in including code for SPP in KVM. KVM doesn't use
VMFUNC or #VE for example, because they are not necessary.
SPP may become useful once we have the introspection interface. Or, if
another hypervisor uses it, support for nested SPP may be useful (for
example we support nested VMFUNC and should get nested #VE sooner or
later, even though the features are not used on bare metal).
Right now, however, supporting SPP does not seem to be particularly
important honestly.
Paolo
next prev parent reply other threads:[~2017-11-04 16:54 UTC|newest]
Thread overview: 29+ messages / expand[flat|nested] mbox.gz Atom feed top
2017-10-13 23:11 Zhang Yi
2017-10-13 16:57 ` Jim Mattson
2017-10-13 21:13 ` Paolo Bonzini
2017-10-16 0:08 ` Yi Zhang
2017-10-18 9:35 ` Paolo Bonzini
2017-10-18 14:07 ` Yi Zhang
2017-10-19 11:57 ` Paolo Bonzini
2017-10-20 8:51 ` Yi Zhang
2017-10-18 14:13 ` Mihai Donțu
2017-10-20 8:47 ` Yi Zhang
2017-10-20 17:06 ` Mihai Donțu
2017-10-24 7:52 ` Yi Zhang
2017-10-16 0:01 ` Yi Zhang
2017-10-13 23:12 ` [PATCH RFC 01/10] KVM: VMX: Added EPT Subpage Protection Documentation Zhang Yi
2017-10-13 23:12 ` [PATCH RFC 02/10] x86/cpufeature: Add intel Sub-Page Protection to CPU features Zhang Yi
2017-10-13 23:13 ` [PATCH RFC 03/10] KVM: VMX: Added VMX SPP feature flags and VM-Execution Controls Zhang Yi
2017-10-13 23:13 ` [PATCH RFC 04/10] KVM: VMX: Introduce the SPPTP and SPP page table Zhang Yi
2017-10-13 23:14 ` [PATCH RFC 05/10] KVM: VMX: Introduce SPP-Induced vm exit and it's handle Zhang Yi
2017-10-13 23:14 ` [PATCH RFC 06/10] KVM: VMX: Added handle of SPP write protection fault Zhang Yi
2017-10-13 23:14 ` [PATCH RFC 07/10] KVM: VMX: Introduce ioctls to set/get Sub-Page Write Protection Zhang Yi
2017-10-13 23:14 ` [PATCH RFC 08/10] KVM: VMX: Update the EPT leaf entry indicated with the SPP enable bit Zhang Yi
2017-10-13 23:14 ` [PATCH RFC 09/10] KVM: VMX: Added setup spp page structure Zhang Yi
2017-10-13 23:16 ` [PATCH RFC 10/10] KVM: VMX: implement setup SPP page structure in spp miss Zhang Yi
2017-10-18 7:09 ` [PATCH RFC 00/10] Intel EPT-Based Sub-page Write Protection Support Christoph Hellwig
2017-10-18 14:02 ` Yi Zhang
2017-11-04 0:12 ` Yi Zhang
2017-11-04 16:54 ` Paolo Bonzini [this message]
2017-11-10 15:39 ` Paolo Bonzini
2017-11-13 10:37 ` Yi Zhang
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