[v2,10/15] VMX: convert vmx_cpu_based_exec_control

Commit Message

Jan Beulich Nov. 24, 2023, 8:41 a.m. UTC

... to a field in the capability/controls struct.

Signed-off-by: Jan Beulich <[e-mail]>
---
v2: New.

Patch

--- a/xen/arch/x86/hvm/vmx/vmcs.c
+++ b/xen/arch/x86/hvm/vmx/vmcs.c
@@ -162,7 +162,6 @@  static int cf_check parse_ept_param_runt
 
 /* Dynamic (run-time adjusted) execution control flags. */
 struct vmx_caps __ro_after_init vmx_caps;
-u32 vmx_cpu_based_exec_control __read_mostly;
 u32 vmx_secondary_exec_control __read_mostly;
 u32 vmx_vmexit_control __read_mostly;
 u32 vmx_vmentry_control __read_mostly;
@@ -238,7 +237,6 @@  static int vmx_init_vmcs_config(bool bsp
 {
     u32 vmx_basic_msr_low, vmx_basic_msr_high, min, opt;
     struct vmx_caps caps;
-    u32 _vmx_cpu_based_exec_control;
     u32 _vmx_secondary_exec_control = 0;
     u64 _vmx_ept_vpid_cap = 0;
     u64 _vmx_misc_cap = 0;
@@ -274,12 +272,12 @@  static int vmx_init_vmcs_config(bool bsp
            CPU_BASED_TPR_SHADOW |
            CPU_BASED_MONITOR_TRAP_FLAG |
            CPU_BASED_ACTIVATE_SECONDARY_CONTROLS);
-    _vmx_cpu_based_exec_control = adjust_vmx_controls(
+    caps.cpu_based_exec_control = adjust_vmx_controls(
         "CPU-Based Exec Control", min, opt,
         MSR_IA32_VMX_PROCBASED_CTLS, &mismatch);
-    _vmx_cpu_based_exec_control &= ~CPU_BASED_RDTSC_EXITING;
-    if ( _vmx_cpu_based_exec_control & CPU_BASED_TPR_SHADOW )
-        _vmx_cpu_based_exec_control &=
+    caps.cpu_based_exec_control &= ~CPU_BASED_RDTSC_EXITING;
+    if ( caps.cpu_based_exec_control & CPU_BASED_TPR_SHADOW )
+        caps.cpu_based_exec_control &=
             ~(CPU_BASED_CR8_LOAD_EXITING | CPU_BASED_CR8_STORE_EXITING);
 
     rdmsrl(MSR_IA32_VMX_MISC, _vmx_misc_cap);
@@ -296,7 +294,7 @@  static int vmx_init_vmcs_config(bool bsp
         return -EINVAL;
     }
 
-    if ( _vmx_cpu_based_exec_control & CPU_BASED_ACTIVATE_SECONDARY_CONTROLS )
+    if ( caps.cpu_based_exec_control & CPU_BASED_ACTIVATE_SECONDARY_CONTROLS )
     {
         min = 0;
         opt = (SECONDARY_EXEC_VIRTUALIZE_APIC_ACCESSES |
@@ -326,7 +324,7 @@  static int vmx_init_vmcs_config(bool bsp
          * "APIC Register Virtualization" and "Virtual Interrupt Delivery"
          * can be set only when "use TPR shadow" is set
          */
-        if ( (_vmx_cpu_based_exec_control & CPU_BASED_TPR_SHADOW) &&
+        if ( (caps.cpu_based_exec_control & CPU_BASED_TPR_SHADOW) &&
              opt_apicv_enabled )
             opt |= SECONDARY_EXEC_APIC_REGISTER_VIRT |
                    SECONDARY_EXEC_VIRTUAL_INTR_DELIVERY |
@@ -464,7 +462,6 @@  static int vmx_init_vmcs_config(bool bsp
     {
         /* First time through. */
         vmx_caps = caps;
-        vmx_cpu_based_exec_control = _vmx_cpu_based_exec_control;
         vmx_secondary_exec_control = _vmx_secondary_exec_control;
         vmx_ept_vpid_cap           = _vmx_ept_vpid_cap;
         vmx_vmexit_control         = _vmx_vmexit_control;
@@ -496,7 +493,7 @@  static int vmx_init_vmcs_config(bool bsp
             vmx_caps.pin_based_exec_control, caps.pin_based_exec_control);
         mismatch |= cap_check(
             "CPU-Based Exec Control",
-            vmx_cpu_based_exec_control, _vmx_cpu_based_exec_control);
+            vmx_caps.cpu_based_exec_control, caps.cpu_based_exec_control);
         mismatch |= cap_check(
             "Secondary Exec Control",
             vmx_secondary_exec_control, _vmx_secondary_exec_control);
@@ -1073,7 +1070,7 @@  static int construct_vmcs(struct vcpu *v
     /* VMCS controls. */
     __vmwrite(PIN_BASED_VM_EXEC_CONTROL, vmx_caps.pin_based_exec_control);
 
-    v->arch.hvm.vmx.exec_control = vmx_cpu_based_exec_control;
+    v->arch.hvm.vmx.exec_control = vmx_caps.cpu_based_exec_control;
     if ( d->arch.vtsc && !cpu_has_vmx_tsc_scaling )
         v->arch.hvm.vmx.exec_control |= CPU_BASED_RDTSC_EXITING;
 
@@ -2169,7 +2166,6 @@  int __init vmx_vmcs_init(void)
          * Make sure all dependent features are off as well.
          */
         memset(&vmx_caps, 0, sizeof(vmx_caps));
-        vmx_cpu_based_exec_control = 0;
         vmx_secondary_exec_control = 0;
         vmx_vmexit_control         = 0;
         vmx_vmentry_control        = 0;
--- a/xen/arch/x86/include/asm/hvm/vmx/vmcs.h
+++ b/xen/arch/x86/include/asm/hvm/vmx/vmcs.h
@@ -208,7 +208,6 @@  void vmx_vmcs_reload(struct vcpu *v);
 #define CPU_BASED_MONITOR_EXITING             0x20000000U
 #define CPU_BASED_PAUSE_EXITING               0x40000000U
 #define CPU_BASED_ACTIVATE_SECONDARY_CONTROLS 0x80000000U
-extern u32 vmx_cpu_based_exec_control;
 
 #define PIN_BASED_EXT_INTR_MASK         0x00000001
 #define PIN_BASED_NMI_EXITING           0x00000008
@@ -286,6 +285,7 @@  extern u64 vmx_ept_vpid_cap;
 struct vmx_caps {
     uint64_t basic_msr;
     uint32_t pin_based_exec_control;
+    uint32_t cpu_based_exec_control;
 };
 extern struct vmx_caps vmx_caps;
 
@@ -294,13 +294,13 @@  extern struct vmx_caps vmx_caps;
 #define cpu_has_vmx_virtualize_apic_accesses \
     (vmx_secondary_exec_control & SECONDARY_EXEC_VIRTUALIZE_APIC_ACCESSES)
 #define cpu_has_vmx_tpr_shadow \
-    (vmx_cpu_based_exec_control & CPU_BASED_TPR_SHADOW)
+    (vmx_caps.cpu_based_exec_control & CPU_BASED_TPR_SHADOW)
 #define cpu_has_vmx_vnmi \
     (vmx_caps.pin_based_exec_control & PIN_BASED_VIRTUAL_NMIS)
 #define cpu_has_vmx_msr_bitmap \
-    (vmx_cpu_based_exec_control & CPU_BASED_ACTIVATE_MSR_BITMAP)
+    (vmx_caps.cpu_based_exec_control & CPU_BASED_ACTIVATE_MSR_BITMAP)
 #define cpu_has_vmx_secondary_exec_control \
-    (vmx_cpu_based_exec_control & CPU_BASED_ACTIVATE_SECONDARY_CONTROLS)
+    (vmx_caps.cpu_based_exec_control & CPU_BASED_ACTIVATE_SECONDARY_CONTROLS)
 #define cpu_has_vmx_ept \
     (vmx_secondary_exec_control & SECONDARY_EXEC_ENABLE_EPT)
 #define cpu_has_vmx_dt_exiting \
@@ -310,7 +310,7 @@  extern struct vmx_caps vmx_caps;
 #define cpu_has_vmx_vpid \
     (vmx_secondary_exec_control & SECONDARY_EXEC_ENABLE_VPID)
 #define cpu_has_monitor_trap_flag \
-    (vmx_cpu_based_exec_control & CPU_BASED_MONITOR_TRAP_FLAG)
+    (vmx_caps.cpu_based_exec_control & CPU_BASED_MONITOR_TRAP_FLAG)
 #define cpu_has_vmx_pat \
     (vmx_vmentry_control & VM_ENTRY_LOAD_GUEST_PAT)
 #define cpu_has_vmx_efer \