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[xen master] x86/vmx: guard access to cpu_has_vmx_* in common code

Date: Thu, 15 Aug 2024 18:00:32 +0000

Delivery-date: Thu, 15 Aug 2024 18:00:33 +0000

List-id: "Change log for Mercurial \(receive only\)" <xen-changelog.lists.xenproject.org>

commit b2e8c8f42083afcac8b4720c50680d7c9eaaf90a Author: Sergiy Kibrik <Sergiy_Kibrik@xxxxxxxx> AuthorDate: Tue Aug 13 16:38:40 2024 +0200 Commit: Jan Beulich <jbeulich@xxxxxxxx> CommitDate: Tue Aug 13 16:38:40 2024 +0200 x86/vmx: guard access to cpu_has_vmx_* in common code There're several places in common code, outside of arch/x86/hvm/vmx, where cpu_has_vmx_* get accessed without checking whether VMX supported first. These macros rely on global variables defined in vmx code, so when VMX support is disabled accesses to these variables turn into build failures. To overcome these failures, build-time check is done before accessing global variables, so that DCE would remove these variables. Signed-off-by: Sergiy Kibrik <Sergiy_Kibrik@xxxxxxxx> Acked-by: Paul Durrant <paul@xxxxxxx> Acked-by: Jan Beulich <jbeulich@xxxxxxxx> --- xen/arch/x86/include/asm/hvm/vmx/vmcs.h | 90 ++++++++++++++++++++++----------- 1 file changed, 60 insertions(+), 30 deletions(-) diff --git a/xen/arch/x86/include/asm/hvm/vmx/vmcs.h b/xen/arch/x86/include/asm/hvm/vmx/vmcs.h index 58140af691..939b87eb50 100644 --- a/xen/arch/x86/include/asm/hvm/vmx/vmcs.h +++ b/xen/arch/x86/include/asm/hvm/vmx/vmcs.h @@ -298,69 +298,99 @@ extern u64 vmx_ept_vpid_cap; #define VMX_TSC_MULTIPLIER_MAX 0xffffffffffffffffULL #define cpu_has_wbinvd_exiting \ - (vmx_secondary_exec_control & SECONDARY_EXEC_WBINVD_EXITING) + (IS_ENABLED(CONFIG_INTEL_VMX) && \ + vmx_secondary_exec_control & SECONDARY_EXEC_WBINVD_EXITING) #define cpu_has_vmx_virtualize_apic_accesses \ - (vmx_secondary_exec_control & SECONDARY_EXEC_VIRTUALIZE_APIC_ACCESSES) + (IS_ENABLED(CONFIG_INTEL_VMX) && \ + vmx_secondary_exec_control & SECONDARY_EXEC_VIRTUALIZE_APIC_ACCESSES) #define cpu_has_vmx_tpr_shadow \ - (vmx_cpu_based_exec_control & CPU_BASED_TPR_SHADOW) + (IS_ENABLED(CONFIG_INTEL_VMX) && \ + vmx_cpu_based_exec_control & CPU_BASED_TPR_SHADOW) #define cpu_has_vmx_vnmi \ - (vmx_pin_based_exec_control & PIN_BASED_VIRTUAL_NMIS) + (IS_ENABLED(CONFIG_INTEL_VMX) && \ + vmx_pin_based_exec_control & PIN_BASED_VIRTUAL_NMIS) #define cpu_has_vmx_msr_bitmap \ - (vmx_cpu_based_exec_control & CPU_BASED_ACTIVATE_MSR_BITMAP) + (IS_ENABLED(CONFIG_INTEL_VMX) && \ + vmx_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) + (IS_ENABLED(CONFIG_INTEL_VMX) && \ + vmx_cpu_based_exec_control & CPU_BASED_ACTIVATE_SECONDARY_CONTROLS) #define cpu_has_vmx_tertiary_exec_control \ - (vmx_cpu_based_exec_control & CPU_BASED_ACTIVATE_TERTIARY_CONTROLS) + (IS_ENABLED(CONFIG_INTEL_VMX) && \ + vmx_cpu_based_exec_control & CPU_BASED_ACTIVATE_TERTIARY_CONTROLS) #define cpu_has_vmx_ept \ - (vmx_secondary_exec_control & SECONDARY_EXEC_ENABLE_EPT) + (IS_ENABLED(CONFIG_INTEL_VMX) && \ + vmx_secondary_exec_control & SECONDARY_EXEC_ENABLE_EPT) #define cpu_has_vmx_dt_exiting \ - (vmx_secondary_exec_control & SECONDARY_EXEC_DESCRIPTOR_TABLE_EXITING) + (IS_ENABLED(CONFIG_INTEL_VMX) && \ + vmx_secondary_exec_control & SECONDARY_EXEC_DESCRIPTOR_TABLE_EXITING) #define cpu_has_vmx_rdtscp \ - (vmx_secondary_exec_control & SECONDARY_EXEC_ENABLE_RDTSCP) + (IS_ENABLED(CONFIG_INTEL_VMX) && \ + vmx_secondary_exec_control & SECONDARY_EXEC_ENABLE_RDTSCP) #define cpu_has_vmx_vpid \ - (vmx_secondary_exec_control & SECONDARY_EXEC_ENABLE_VPID) + (IS_ENABLED(CONFIG_INTEL_VMX) && \ + vmx_secondary_exec_control & SECONDARY_EXEC_ENABLE_VPID) #define cpu_has_monitor_trap_flag \ - (vmx_cpu_based_exec_control & CPU_BASED_MONITOR_TRAP_FLAG) + (IS_ENABLED(CONFIG_INTEL_VMX) && \ + vmx_cpu_based_exec_control & CPU_BASED_MONITOR_TRAP_FLAG) #define cpu_has_vmx_pat \ - (vmx_vmentry_control & VM_ENTRY_LOAD_GUEST_PAT) + (IS_ENABLED(CONFIG_INTEL_VMX) && \ + vmx_vmentry_control & VM_ENTRY_LOAD_GUEST_PAT) #define cpu_has_vmx_efer \ - (vmx_vmentry_control & VM_ENTRY_LOAD_GUEST_EFER) + (IS_ENABLED(CONFIG_INTEL_VMX) && \ + vmx_vmentry_control & VM_ENTRY_LOAD_GUEST_EFER) #define cpu_has_vmx_unrestricted_guest \ - (vmx_secondary_exec_control & SECONDARY_EXEC_UNRESTRICTED_GUEST) + (IS_ENABLED(CONFIG_INTEL_VMX) && \ + vmx_secondary_exec_control & SECONDARY_EXEC_UNRESTRICTED_GUEST) #define vmx_unrestricted_guest(v) \ ((v)->arch.hvm.vmx.secondary_exec_control & \ SECONDARY_EXEC_UNRESTRICTED_GUEST) #define cpu_has_vmx_ple \ - (vmx_secondary_exec_control & SECONDARY_EXEC_PAUSE_LOOP_EXITING) + (IS_ENABLED(CONFIG_INTEL_VMX) && \ + vmx_secondary_exec_control & SECONDARY_EXEC_PAUSE_LOOP_EXITING) #define cpu_has_vmx_invpcid \ - (vmx_secondary_exec_control & SECONDARY_EXEC_ENABLE_INVPCID) + (IS_ENABLED(CONFIG_INTEL_VMX) && \ + vmx_secondary_exec_control & SECONDARY_EXEC_ENABLE_INVPCID) #define cpu_has_vmx_apic_reg_virt \ - (vmx_secondary_exec_control & SECONDARY_EXEC_APIC_REGISTER_VIRT) + (IS_ENABLED(CONFIG_INTEL_VMX) && \ + vmx_secondary_exec_control & SECONDARY_EXEC_APIC_REGISTER_VIRT) #define cpu_has_vmx_virtual_intr_delivery \ - (vmx_secondary_exec_control & SECONDARY_EXEC_VIRTUAL_INTR_DELIVERY) + (IS_ENABLED(CONFIG_INTEL_VMX) && \ + vmx_secondary_exec_control & SECONDARY_EXEC_VIRTUAL_INTR_DELIVERY) #define cpu_has_vmx_virtualize_x2apic_mode \ - (vmx_secondary_exec_control & SECONDARY_EXEC_VIRTUALIZE_X2APIC_MODE) + (IS_ENABLED(CONFIG_INTEL_VMX) && \ + vmx_secondary_exec_control & SECONDARY_EXEC_VIRTUALIZE_X2APIC_MODE) #define cpu_has_vmx_posted_intr_processing \ - (vmx_pin_based_exec_control & PIN_BASED_POSTED_INTERRUPT) + (IS_ENABLED(CONFIG_INTEL_VMX) && \ + vmx_pin_based_exec_control & PIN_BASED_POSTED_INTERRUPT) #define cpu_has_vmx_vmcs_shadowing \ - (vmx_secondary_exec_control & SECONDARY_EXEC_ENABLE_VMCS_SHADOWING) + (IS_ENABLED(CONFIG_INTEL_VMX) && \ + vmx_secondary_exec_control & SECONDARY_EXEC_ENABLE_VMCS_SHADOWING) #define cpu_has_vmx_vmfunc \ - (vmx_secondary_exec_control & SECONDARY_EXEC_ENABLE_VM_FUNCTIONS) + (IS_ENABLED(CONFIG_INTEL_VMX) && \ + vmx_secondary_exec_control & SECONDARY_EXEC_ENABLE_VM_FUNCTIONS) #define cpu_has_vmx_virt_exceptions \ - (vmx_secondary_exec_control & SECONDARY_EXEC_ENABLE_VIRT_EXCEPTIONS) + (IS_ENABLED(CONFIG_INTEL_VMX) && \ + vmx_secondary_exec_control & SECONDARY_EXEC_ENABLE_VIRT_EXCEPTIONS) #define cpu_has_vmx_pml \ - (vmx_secondary_exec_control & SECONDARY_EXEC_ENABLE_PML) + (IS_ENABLED(CONFIG_INTEL_VMX) && \ + vmx_secondary_exec_control & SECONDARY_EXEC_ENABLE_PML) #define cpu_has_vmx_mpx \ - ((vmx_vmexit_control & VM_EXIT_CLEAR_BNDCFGS) && \ + (IS_ENABLED(CONFIG_INTEL_VMX) && \ + (vmx_vmexit_control & VM_EXIT_CLEAR_BNDCFGS) && \ (vmx_vmentry_control & VM_ENTRY_LOAD_BNDCFGS)) #define cpu_has_vmx_xsaves \ - (vmx_secondary_exec_control & SECONDARY_EXEC_XSAVES) + (IS_ENABLED(CONFIG_INTEL_VMX) && \ + vmx_secondary_exec_control & SECONDARY_EXEC_XSAVES) #define cpu_has_vmx_tsc_scaling \ - (vmx_secondary_exec_control & SECONDARY_EXEC_TSC_SCALING) + (IS_ENABLED(CONFIG_INTEL_VMX) && \ + vmx_secondary_exec_control & SECONDARY_EXEC_TSC_SCALING) #define cpu_has_vmx_bus_lock_detection \ - (vmx_secondary_exec_control & SECONDARY_EXEC_BUS_LOCK_DETECTION) + (IS_ENABLED(CONFIG_INTEL_VMX) && \ + vmx_secondary_exec_control & SECONDARY_EXEC_BUS_LOCK_DETECTION) #define cpu_has_vmx_notify_vm_exiting \ - (vmx_secondary_exec_control & SECONDARY_EXEC_NOTIFY_VM_EXITING) + (IS_ENABLED(CONFIG_INTEL_VMX) && \ + vmx_secondary_exec_control & SECONDARY_EXEC_NOTIFY_VM_EXITING) #define VMCS_RID_TYPE_MASK 0x80000000U -- generated by git-patchbot for /home/xen/git/xen.git#master

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