[PATCH v3 16/25] KVM: VMX: Move CPU_BASED_CR8_{LOAD,STORE}_EXITING filtering out of setup_vmcs_config()

Vitaly Kuznetsov
2022-07-08T14:43:30Z

As a preparation to reusing the result of setup_vmcs_config() in
nested VMX MSR setup, move CPU_BASED_CR8_{LOAD,STORE}_EXITING filtering
to vmx_exec_control().

No functional change intended.

Reviewed-by: Jim Mattson <jmattson@google.com>
Signed-off-by: Vitaly Kuznetsov <vkuznets@redhat.com>
---
arch/x86/kvm/vmx/vmx.c | 13 ++++++-------
1 file changed, 6 insertions(+), 7 deletions(-)

diff --git a/arch/x86/kvm/vmx/vmx.c b/arch/x86/kvm/vmx/vmx.c
index 93ca9ff8e641..d7170990f469 100644
--- a/arch/x86/kvm/vmx/vmx.c
+++ b/arch/x86/kvm/vmx/vmx.c
@@ -2479,11 +2479,6 @@ static __init int setup_vmcs_config(struct vmcs_config *vmcs_conf,
MSR_IA32_VMX_PROCBASED_CTLS,
&_cpu_based_exec_control) < 0)
return -EIO;
-#ifdef CONFIG_X86_64
- if (_cpu_based_exec_control & CPU_BASED_TPR_SHADOW)
- _cpu_based_exec_control &= ~CPU_BASED_CR8_LOAD_EXITING &
- ~CPU_BASED_CR8_STORE_EXITING;
-#endif
if (_cpu_based_exec_control & CPU_BASED_ACTIVATE_SECONDARY_CONTROLS) {
if (adjust_vmx_controls(KVM_REQ_VMX_SECONDARY_VM_EXEC_CONTROL,
KVM_OPT_VMX_SECONDARY_VM_EXEC_CONTROL,
@@ -4248,13 +4243,17 @@ static u32 vmx_exec_control(struct vcpu_vmx *vmx)
if (vmx->vcpu.arch.switch_db_regs & KVM_DEBUGREG_WONT_EXIT)
exec_control &= ~CPU_BASED_MOV_DR_EXITING;

- if (!cpu_need_tpr_shadow(&vmx->vcpu)) {
+ if (!cpu_need_tpr_shadow(&vmx->vcpu))
exec_control &= ~CPU_BASED_TPR_SHADOW;
+
#ifdef CONFIG_X86_64
+ if (exec_control & CPU_BASED_TPR_SHADOW)
+ exec_control &= ~(CPU_BASED_CR8_LOAD_EXITING |
+ CPU_BASED_CR8_STORE_EXITING);
+ else
exec_control |= CPU_BASED_CR8_STORE_EXITING |
CPU_BASED_CR8_LOAD_EXITING;
#endif
- }
if (!enable_ept)
exec_control |= CPU_BASED_CR3_STORE_EXITING |
CPU_BASED_CR3_LOAD_EXITING |
--
2.35.3