[xen staging] VMX: convert vmx_cpu_based_exec_control

[patchbot@xxxxxxx]

commit 6bd5e5ec3d14a73a76c1b06ebdd7cb0754753ca2
Author:     Jan Beulich <jbeulich@xxxxxxxx>
AuthorDate: Thu Mar 6 13:58:04 2025 +0100
Commit:     Jan Beulich <jbeulich@xxxxxxxx>
CommitDate: Thu Mar 6 13:58:04 2025 +0100

    VMX: convert vmx_cpu_based_exec_control
    
    ... to a field in the capability/controls struct.
    
    Signed-off-by: Jan Beulich <jbeulich@xxxxxxxx>
    Acked-by: Roger Pau Monné <roger.pau@xxxxxxxxxx>
---
 xen/arch/x86/hvm/vmx/vmcs.c             | 22 +++++++++-------------
 xen/arch/x86/include/asm/hvm/vmx/vmcs.h | 12 ++++++------
 2 files changed, 15 insertions(+), 19 deletions(-)

diff --git a/xen/arch/x86/hvm/vmx/vmcs.c b/xen/arch/x86/hvm/vmx/vmcs.c
index ecac859f7e..bf73babac0 100644
--- a/xen/arch/x86/hvm/vmx/vmcs.c
+++ b/xen/arch/x86/hvm/vmx/vmcs.c
@@ -164,7 +164,6 @@ static int cf_check parse_ept_param_runtime(const char *s)
 
 /* 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;
 uint64_t vmx_tertiary_exec_control __read_mostly;
 u32 vmx_vmexit_control __read_mostly;
@@ -265,7 +264,6 @@ 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;
     uint64_t _vmx_tertiary_exec_control = 0;
     u64 _vmx_ept_vpid_cap = 0;
@@ -303,12 +301,12 @@ static int vmx_init_vmcs_config(bool bsp)
            CPU_BASED_MONITOR_TRAP_FLAG |
            CPU_BASED_ACTIVATE_SECONDARY_CONTROLS |
            CPU_BASED_ACTIVATE_TERTIARY_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);
@@ -325,7 +323,7 @@ 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 |
@@ -355,7 +353,7 @@ 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 |
@@ -366,7 +364,7 @@ static int vmx_init_vmcs_config(bool bsp)
             MSR_IA32_VMX_PROCBASED_CTLS2, &mismatch);
     }
 
-    if ( _vmx_cpu_based_exec_control & CPU_BASED_ACTIVATE_TERTIARY_CONTROLS )
+    if ( caps.cpu_based_exec_control & CPU_BASED_ACTIVATE_TERTIARY_CONTROLS )
     {
         uint64_t opt = (TERTIARY_EXEC_VIRT_SPEC_CTRL |
                         TERTIARY_EXEC_EPT_PAGING_WRITE);
@@ -503,7 +501,6 @@ 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_tertiary_exec_control  = _vmx_tertiary_exec_control;
         vmx_ept_vpid_cap           = _vmx_ept_vpid_cap;
@@ -536,7 +533,7 @@ 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);
@@ -1116,7 +1113,7 @@ 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;
 
@@ -2230,7 +2227,6 @@ 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_tertiary_exec_control  = 0;
         vmx_vmexit_control         = 0;
diff --git a/xen/arch/x86/include/asm/hvm/vmx/vmcs.h 
b/xen/arch/x86/include/asm/hvm/vmx/vmcs.h
index 28afad568f..685a28c336 100644
--- a/xen/arch/x86/include/asm/hvm/vmx/vmcs.h
+++ b/xen/arch/x86/include/asm/hvm/vmx/vmcs.h
@@ -210,7 +210,6 @@ 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
@@ -303,6 +302,7 @@ 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;
 
@@ -314,19 +314,19 @@ extern struct vmx_caps vmx_caps;
      vmx_secondary_exec_control & SECONDARY_EXEC_VIRTUALIZE_APIC_ACCESSES)
 #define cpu_has_vmx_tpr_shadow \
     (IS_ENABLED(CONFIG_INTEL_VMX) && \
-     vmx_cpu_based_exec_control & CPU_BASED_TPR_SHADOW)
+     (vmx_caps.cpu_based_exec_control & CPU_BASED_TPR_SHADOW))
 #define cpu_has_vmx_vnmi \
     (IS_ENABLED(CONFIG_INTEL_VMX) && \
      (vmx_caps.pin_based_exec_control & PIN_BASED_VIRTUAL_NMIS))
 #define cpu_has_vmx_msr_bitmap \
     (IS_ENABLED(CONFIG_INTEL_VMX) && \
-     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 \
     (IS_ENABLED(CONFIG_INTEL_VMX) && \
-     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_tertiary_exec_control \
     (IS_ENABLED(CONFIG_INTEL_VMX) && \
-     vmx_cpu_based_exec_control & CPU_BASED_ACTIVATE_TERTIARY_CONTROLS)
+     (vmx_caps.cpu_based_exec_control & CPU_BASED_ACTIVATE_TERTIARY_CONTROLS))
 #define cpu_has_vmx_ept \
     (IS_ENABLED(CONFIG_INTEL_VMX) && \
      vmx_secondary_exec_control & SECONDARY_EXEC_ENABLE_EPT)
@@ -341,7 +341,7 @@ extern struct vmx_caps vmx_caps;
      vmx_secondary_exec_control & SECONDARY_EXEC_ENABLE_VPID)
 #define cpu_has_monitor_trap_flag \
     (IS_ENABLED(CONFIG_INTEL_VMX) && \
-     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 \
     (IS_ENABLED(CONFIG_INTEL_VMX) && \
      vmx_vmentry_control & VM_ENTRY_LOAD_GUEST_PAT)
--
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