Re: [PATCH 1/5] KVM: nVMX: Fix VMX controls MSRs setup when nested VMX enabled

[Xiaoyao Li]

On 8/28/2020 4:56 PM, Chenyi Qiang wrote:

KVM supports the nested VM_{EXIT, ENTRY}_LOAD_IA32_PERF_GLOBAL_CTRL and
VM_{ENTRY_LOAD, EXIT_CLEAR}_BNDCFGS, but they doesn't expose during
the setup of nested VMX controls MSR.

Signed-off-by: Chenyi Qiang <chenyi.qi...@intel.com>

Reviewed-by: Xiaoyao Li <xiaoyao...@intel.com>

---
  arch/x86/kvm/vmx/nested.c | 6 ++++--
  1 file changed, 4 insertions(+), 2 deletions(-)

diff --git a/arch/x86/kvm/vmx/nested.c b/arch/x86/kvm/vmx/nested.c
index 23b58c28a1c9..6e0e71f4d45f 100644
--- a/arch/x86/kvm/vmx/nested.c
+++ b/arch/x86/kvm/vmx/nested.c
@@ -6310,7 +6310,8 @@ void nested_vmx_setup_ctls_msrs(struct nested_vmx_msrs 
*msrs, u32 ept_caps)
  #ifdef CONFIG_X86_64
                VM_EXIT_HOST_ADDR_SPACE_SIZE |
  #endif
-               VM_EXIT_LOAD_IA32_PAT | VM_EXIT_SAVE_IA32_PAT;
+               VM_EXIT_LOAD_IA32_PAT | VM_EXIT_SAVE_IA32_PAT |
+               VM_EXIT_CLEAR_BNDCFGS | VM_EXIT_LOAD_IA32_PERF_GLOBAL_CTRL;
        msrs->exit_ctls_high |=
                VM_EXIT_ALWAYSON_WITHOUT_TRUE_MSR |
                VM_EXIT_LOAD_IA32_EFER | VM_EXIT_SAVE_IA32_EFER |
@@ -6329,7 +6330,8 @@ void nested_vmx_setup_ctls_msrs(struct nested_vmx_msrs 
*msrs, u32 ept_caps)
  #ifdef CONFIG_X86_64
                VM_ENTRY_IA32E_MODE |
  #endif
-               VM_ENTRY_LOAD_IA32_PAT;
+               VM_ENTRY_LOAD_IA32_PAT | VM_ENTRY_LOAD_BNDCFGS |
+               VM_ENTRY_LOAD_IA32_PERF_GLOBAL_CTRL;
        msrs->entry_ctls_high |=
                (VM_ENTRY_ALWAYSON_WITHOUT_TRUE_MSR | VM_ENTRY_LOAD_IA32_EFER);