[PATCH 0/2] Expose VMFUNC to the nested hypervisor

From	Bandan Das <bsd@redhat.com>
Newsgroups	linux.kernel
Subject	[PATCH 0/2] Expose VMFUNC to the nested hypervisor
Date	2017-06-30 01:40 +0200
Message-ID	<tXRcu-5ZS-5@gated-at.bofh.it> (permalink)
Organization	linux.* mail to news gateway

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These patches expose eptp switching/vmfunc to the nested hypervisor. Testing with
kvm-unit-tests seems to work ok.

If the guest hypervisor enables vmfunc/eptp switching, a "shadow" eptp list
address page is written to the VMCS. Initially, it would be unpopulated which
would result in a vmexit with exit reason 59. This hooks to handle_vmfunc()
to rewrite vmcs12->ept_pointer to reload the mmu and get a new root hpa.
This new shadow ept pointer is written to the shadow eptp list in the given
index. A next vmfunc call to switch to the given index would succeed without
an exit.

Bandan Das (2):
  KVM: nVMX: Implement EPTP switching for the L1 hypervisor
  KVM: nVMX: Advertise VMFUNC to L1 hypervisor

 arch/x86/include/asm/vmx.h |   9 ++++
 arch/x86/kvm/vmx.c         | 122 +++++++++++++++++++++++++++++++++++++++++++++
 2 files changed, 131 insertions(+)

-- 
2.9.4

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[PATCH 0/2] Expose VMFUNC to the nested hypervisor Bandan Das <bsd@redhat.com> - 2017-06-30 01:40 +0200
  Re: [PATCH 0/2] Expose VMFUNC to the nested hypervisor Jim Mattson <jmattson@google.com> - 2017-06-30 19:10 +0200
    Re: [PATCH 0/2] Expose VMFUNC to the nested hypervisor Bandan Das <bsd@redhat.com> - 2017-06-30 20:00 +0200
    Re: [PATCH 0/2] Expose VMFUNC to the nested hypervisor Paolo Bonzini <pbonzini@redhat.com> - 2017-06-30 21:10 +0200

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