On Mon, Aug 19, 2019 at 05:13:47PM +0200, Paolo Bonzini wrote:
> On 14/08/19 09:03, Yang Weijiang wrote:
> > static struct kvm_x86_ops vmx_x86_ops __ro_after_init = {
> > .cpu_has_kvm_support = cpu_has_kvm_support,
> > .disabled_by_bios = vmx_disabled_by_bios,
> > @@ -7740,6 +7783,11 @@
On Mon, Aug 19, 2019 at 05:05:22PM +0200, Paolo Bonzini wrote:
> On 14/08/19 09:03, Yang Weijiang wrote:
> > +
> > +int kvm_mmu_get_subpages(struct kvm *kvm, struct kvm_subpage *spp_info,
> > +bool mmu_locked)
> > +{
> > + u32 *access = spp_info->access_map;
> > + gfn_t gfn
On Mon, Aug 19, 2019 at 05:15:01PM +0200, Paolo Bonzini wrote:
> On 19/08/19 04:08, Yang Weijiang wrote:
> >> KVM_GET_NESTED_STATE has the requested information. If
> >> data.vmx.vmxon_pa is anything other than -1, then the vCPU is in VMX
> >> operation. If (flags & KVM_STATE_NESTED_GUEST_MODE),
On 19/08/19 04:08, Yang Weijiang wrote:
>> KVM_GET_NESTED_STATE has the requested information. If
>> data.vmx.vmxon_pa is anything other than -1, then the vCPU is in VMX
>> operation. If (flags & KVM_STATE_NESTED_GUEST_MODE), then L2 is
>> active.
> Thanks Jim, I'll reference the code and make
On 14/08/19 09:03, Yang Weijiang wrote:
> init_spp() must be called before {get, set}_subpage
> functions, it creates subpage access bitmaps for memory pages
> and issues a KVM request to setup SPPT root pages.
>
> kvm_mmu_set_subpages() is to enable SPP bit in EPT leaf page
> and setup
On 14/08/19 09:03, Yang Weijiang wrote:
> +
> +int kvm_mmu_get_subpages(struct kvm *kvm, struct kvm_subpage *spp_info,
> + bool mmu_locked)
> +{
> + u32 *access = spp_info->access_map;
> + gfn_t gfn = spp_info->base_gfn;
> + int npages = spp_info->npages;
> +
On Thu, Aug 15, 2019 at 04:03:31PM +0200, Vitaly Kuznetsov wrote:
> Yang Weijiang writes:
>
> > After looked into the issue and others, I feel to make SPP co-existing
> > with nested VM is not good, the major reason is, L1 pages protected by
> > SPP are transparent to L1 VM, if it launches L2
On Fri, Aug 16, 2019 at 11:19:46AM -0700, Jim Mattson wrote:
> On Fri, Aug 16, 2019 at 6:29 AM Yang Weijiang wrote:
>
> > Thanks Jim and Sean! Could we add a new flag in kvm to identify if nested
> > VM is on
> > or off? That would make things easier. When VMLAUNCH is trapped,
> > set the flag,
On Fri, Aug 16, 2019 at 6:29 AM Yang Weijiang wrote:
> Thanks Jim and Sean! Could we add a new flag in kvm to identify if nested VM
> is on
> or off? That would make things easier. When VMLAUNCH is trapped,
> set the flag, if VMXOFF is trapped, clear the flag.
KVM_GET_NESTED_STATE has the
On Thu, Aug 15, 2019 at 09:38:44AM -0700, Sean Christopherson wrote:
> On Thu, Aug 15, 2019 at 09:25:41AM -0700, Jim Mattson wrote:
> > On Thu, Aug 15, 2019 at 6:41 AM Yang Weijiang
> > wrote:
> >
> > > Hi, Vitaly,
> > > After looked into the issue and others, I feel to make SPP co-existing
> >
On Thu, Aug 15, 2019 at 09:25:41AM -0700, Jim Mattson wrote:
> On Thu, Aug 15, 2019 at 6:41 AM Yang Weijiang wrote:
>
> > Hi, Vitaly,
> > After looked into the issue and others, I feel to make SPP co-existing
> > with nested VM is not good, the major reason is, L1 pages protected by
> > SPP are
On Thu, Aug 15, 2019 at 6:41 AM Yang Weijiang wrote:
> Hi, Vitaly,
> After looked into the issue and others, I feel to make SPP co-existing
> with nested VM is not good, the major reason is, L1 pages protected by
> SPP are transparent to L1 VM, if it launches L2 VM, probably the
> pages would be
Yang Weijiang writes:
> After looked into the issue and others, I feel to make SPP co-existing
> with nested VM is not good, the major reason is, L1 pages protected by
> SPP are transparent to L1 VM, if it launches L2 VM, probably the
> pages would be allocated to L2 VM, and that will bother to
On Wed, Aug 14, 2019 at 02:43:39PM +0200, Vitaly Kuznetsov wrote:
> Yang Weijiang writes:
>
> > init_spp() must be called before {get, set}_subpage
> > functions, it creates subpage access bitmaps for memory pages
> > and issues a KVM request to setup SPPT root pages.
> >
> >
On Wed, Aug 14, 2019 at 02:43:39PM +0200, Vitaly Kuznetsov wrote:
> Yang Weijiang writes:
>
> > init_spp() must be called before {get, set}_subpage
> > functions, it creates subpage access bitmaps for memory pages
> > and issues a KVM request to setup SPPT root pages.
> >
> >
Yang Weijiang writes:
> init_spp() must be called before {get, set}_subpage
> functions, it creates subpage access bitmaps for memory pages
> and issues a KVM request to setup SPPT root pages.
>
> kvm_mmu_set_subpages() is to enable SPP bit in EPT leaf page
> and setup corresponding SPPT
init_spp() must be called before {get, set}_subpage
functions, it creates subpage access bitmaps for memory pages
and issues a KVM request to setup SPPT root pages.
kvm_mmu_set_subpages() is to enable SPP bit in EPT leaf page
and setup corresponding SPPT entries. The mmu_lock
is held before above
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