[KVM nVMX]: Check "load IA32_PERF_GLOBAL_CTRL" on vmentry of nested guests

[Krish Sadhukhan <krish.sadhukhan@oracle.com>]

Patch 1 through 7 add the necessary KVM code for checking and enabling
"load IA32_PERF_GLOBAL_CTRL" VM-{exit,entry} controls.

Patch# 8 adds a unit test for the "load IA32_PERF_GLOBAL_CTRL" VM-exit
control. I will send a separate patch for the unit test for
"load IA32_PERF_GLOBAL_CTRL" VM-entry control.


[PATCH 1/8][KVMnVMX]: Enable "load IA32_PERF_GLOBAL_CTRL" VM-exit control
[PATCH 2/8][KVM nVMX]: Enable "load IA32_PERF_GLOBAL_CTRL" VM-entry
[PATCH 3/8][KVM VMX]: Add a function to check reserved bits in
[PATCH 4/8][KVM nVMX]: Check "load IA32_PERF_GLOBAL_CTRL" VM-exit control
[PATCH 5/8][KVM nVMX]: Check "load IA32_PERF_GLOBAL_CTRL" VM-entry control
[PATCH 6/8][KVM nVMX]: Load IA32_PERF_GLOBAL_CTRL MSR on vmentry of nested
[PATCH 7/8][KVM nVMX]: Enable "load IA32_PERF_GLOBAL_CTRL VM-{entry,exit}
[PATCH 8/8][KVM nVMX]: Test "load IA32_PERF_GLOBAL_CTRL" controls on vmentry

 arch/x86/include/asm/kvm_host.h  |  1 +
 arch/x86/include/asm/msr-index.h |  7 +++++++
 arch/x86/kvm/vmx/nested.c        | 19 +++++++++++++++++--
 arch/x86/kvm/vmx/vmx.c           | 12 ++++++++++++
 arch/x86/kvm/x86.c               | 20 ++++++++++++++++++++
 5 files changed, 57 insertions(+), 2 deletions(-)

Krish Sadhukhan (7):
      nVMX: Enable "load IA32_PERF_GLOBAL_CTRL" VM-exit control for nested guests
      nVMX: Enable "load IA32_PERF_GLOBAL_CTRL" VM-entry control for nested guests
      VMX: Add a function to check reserved bits in MSR_CORE_PERF_GLOBAL_CTRL
      nVMX: Check "load IA32_PERF_GLOBAL_CTRL" VM-exit control on vmentry of nested guests
      nVMX: Check "load IA32_PERF_GLOBAL_CTRL" VM-entry control on vmentry of nested guests
      nVMX: Load IA32_PERF_GLOBAL_CTRL MSR on vmentry of nested guests
      nVMX: Enable "load IA32_PERF_GLOBAL_CTRL VM-{entry,exit} controls

 x86/vmx_tests.c | 59 +++++++++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 59 insertions(+)

Krish Sadhukhan (1):
      nVMX: Test "load IA32_PERF_GLOBAL_CTRL" controls on vmentry of nested guests