[PATCH v2 21/28] KVM: VMX: Add missing CPU based VM execution controls to vmcs_config

[Vitaly Kuznetsov]

As a preparation to reusing the result of setup_vmcs_config() in
nested VMX MSR setup, add the CPU based VM execution controls which KVM
doesn't use but supports for nVMX to KVM_OPT_VMX_CPU_BASED_VM_EXEC_CONTROL
and filter them out in vmx_exec_control().

No functional change intended.

Signed-off-by: Vitaly Kuznetsov <vkuznets@xxxxxxxxxx>
---
 arch/x86/kvm/vmx/vmx.c | 6 ++++++
 arch/x86/kvm/vmx/vmx.h | 6 +++++-
 2 files changed, 11 insertions(+), 1 deletion(-)

diff --git a/arch/x86/kvm/vmx/vmx.c b/arch/x86/kvm/vmx/vmx.c
index b774b6391e0e..e5e4383d0cff 100644
--- a/arch/x86/kvm/vmx/vmx.c
+++ b/arch/x86/kvm/vmx/vmx.c
@@ -4244,6 +4244,12 @@ static u32 vmx_exec_control(struct vcpu_vmx *vmx)
 {
 	u32 exec_control = vmcs_config.cpu_based_exec_ctrl;
 
+	/* Not used by KVM but supported for nesting. */
+	exec_control &= ~(CPU_BASED_RDTSC_EXITING |
+			  CPU_BASED_USE_IO_BITMAPS |
+			  CPU_BASED_MONITOR_TRAP_FLAG |
+			  CPU_BASED_PAUSE_EXITING);
+
 	/* INTR_WINDOW_EXITING and NMI_WINDOW_EXITING are toggled dynamically */
 	exec_control &= ~(CPU_BASED_INTR_WINDOW_EXITING |
 			  CPU_BASED_NMI_WINDOW_EXITING);
diff --git a/arch/x86/kvm/vmx/vmx.h b/arch/x86/kvm/vmx/vmx.h
index 7ada8410a037..01420ef5a9b0 100644
--- a/arch/x86/kvm/vmx/vmx.h
+++ b/arch/x86/kvm/vmx/vmx.h
@@ -543,8 +543,12 @@ static inline u8 vmx_get_rvi(void)
 #endif
 
 #define KVM_OPT_VMX_CPU_BASED_VM_EXEC_CONTROL			\
-	(CPU_BASED_TPR_SHADOW |					\
+	(CPU_BASED_RDTSC_EXITING |				\
+	CPU_BASED_TPR_SHADOW |					\
+	CPU_BASED_USE_IO_BITMAPS |				\
+	CPU_BASED_MONITOR_TRAP_FLAG |				\
 	CPU_BASED_USE_MSR_BITMAPS |				\
+	CPU_BASED_PAUSE_EXITING |				\
 	CPU_BASED_ACTIVATE_SECONDARY_CONTROLS |			\
 	CPU_BASED_ACTIVATE_TERTIARY_CONTROLS)
 
-- 
2.35.3