patches/kernel/0006-Revert-KVM-VMX-enable-nested-virtualization-by-defau.patch

   1 From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
   2 From: Thomas Lamprecht <t.lamprecht@proxmox.com>
   3 Date: Fri, 7 Jun 2019 21:16:42 +0200
   4 Subject: [PATCH] Revert "KVM: VMX: enable nested virtualization by default"
   5
   6 This reverts commit 1e58e5e59148916fa43444a406335a990783fb78
   7
   8 As we're not yet there, and this effectively breaks live migration
   9 for all VMs using host or +vmx which did not manually enabled nesting
  10
  11 Those which already enabled nesting manually have already breakage,
  12 but that was something to expect. The situation will get better in
  13 the future (probably post qemu 4.1).
  14
  15 Signed-off-by: Thomas Lamprecht <t.lamprecht@proxmox.com>
  16 ---
  17  arch/x86/kvm/vmx/vmx.c | 2 +-
  18  1 file changed, 1 insertion(+), 1 deletion(-)
  19
  20 diff --git a/arch/x86/kvm/vmx/vmx.c b/arch/x86/kvm/vmx/vmx.c
  21 index 39a116d43993..25ecb53517eb 100644
  22 --- a/arch/x86/kvm/vmx/vmx.c
  23 +++ b/arch/x86/kvm/vmx/vmx.c
  24 @@ -103,7 +103,7 @@ module_param(enable_apicv, bool, S_IRUGO);
  25   * VMX and be a hypervisor for its own guests. If nested=0, guests may not
  26   * use VMX instructions.
  27   */
  28 -static bool __read_mostly nested = 1;
  29 +static bool __read_mostly nested = 0;
  30  module_param(nested, bool, S_IRUGO);
  31
  32  static u64 __read_mostly host_xss;