From: Christoph Hellwig <hch@infradead.org>
To: Zhang Yi <yi.z.zhang@linux.intel.com>
Cc: kvm@vger.kernel.org, linux-kernel@vger.kernel.org,
pbonzini@redhat.com, rkrcmar@redhat.com
Subject: Re: [PATCH RFC 00/10] Intel EPT-Based Sub-page Write Protection Support.
Date: Wed, 18 Oct 2017 00:09:36 -0700 [thread overview]
Message-ID: <20171018070936.GA10808@infradead.org> (raw)
In-Reply-To: <cover.1506559196.git.yi.z.zhang@linux.intel.com>
> We introduced 2 ioctls to let user application to set/get subpage write protection bitmap per gfn, each gfn corresponds to a bitmap.
> The user application, qemu, or some other security control daemon. will set the protection bitmap via this ioctl.
> the API defined as:
> struct kvm_subpage {
> __u64 base_gfn;
> __u64 npages;
> /* sub-page write-access bitmap array */
> __u32 access_map[SUBPAGE_MAX_BITMAP];
> }sp;
> kvm_vm_ioctl(s, KVM_SUBPAGES_SET_ACCESS, &sp)
> kvm_vm_ioctl(s, KVM_SUBPAGES_GET_ACCESS, &sp)
What is the use case for this feature?
next prev parent reply other threads:[~2017-10-18 7:09 UTC|newest]
Thread overview: 29+ messages / expand[flat|nested] mbox.gz Atom feed top
2017-10-13 23:11 [PATCH RFC 00/10] Intel EPT-Based Sub-page Write Protection Support 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 ` Christoph Hellwig [this message]
2017-10-18 14:02 ` [PATCH RFC 00/10] Intel EPT-Based Sub-page Write Protection Support Yi Zhang
2017-11-04 0:12 ` Yi Zhang
2017-11-04 16:54 ` Paolo Bonzini
2017-11-10 15:39 ` Paolo Bonzini
2017-11-13 10:37 ` Yi Zhang
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