[lkml]   [2017]   [Jun]   [29]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
Messages in this thread
Subject[PATCH 0/2] Expose VMFUNC to the nested hypervisor
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(+)


 \ /
  Last update: 2017-06-30 01:30    [W:0.118 / U:0.024 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site