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| author | Sean Christopherson <seanjc@google.com> | 2021-08-10 10:19:51 -0700 |
|---|---|---|
| committer | Paolo Bonzini <pbonzini@redhat.com> | 2021-08-13 03:35:15 -0400 |
| commit | b6247686b7571003eca2305b2096f59e1e1ce976 (patch) | |
| tree | 77692d9549be503715264270b0a6f5049809ce7f /arch/x86/kvm/vmx/vmx.c | |
| parent | 389ab25216c9d09e0d335e764eeeb84c2089614f (diff) | |
| download | lwn-b6247686b7571003eca2305b2096f59e1e1ce976.tar.gz lwn-b6247686b7571003eca2305b2096f59e1e1ce976.zip | |
KVM: VMX: Drop caching of KVM's desired sec exec controls for vmcs01
Remove the secondary execution controls cache now that it's effectively
dead code; it is only read immediately after it is written.
No functional change intended.
Signed-off-by: Sean Christopherson <seanjc@google.com>
Message-Id: <20210810171952.2758100-4-seanjc@google.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Diffstat (limited to 'arch/x86/kvm/vmx/vmx.c')
| -rw-r--r-- | arch/x86/kvm/vmx/vmx.c | 20 |
1 files changed, 8 insertions, 12 deletions
diff --git a/arch/x86/kvm/vmx/vmx.c b/arch/x86/kvm/vmx/vmx.c index 123ecca91c27..f2622dd335ce 100644 --- a/arch/x86/kvm/vmx/vmx.c +++ b/arch/x86/kvm/vmx/vmx.c @@ -4212,7 +4212,7 @@ vmx_adjust_secondary_exec_control(struct vcpu_vmx *vmx, u32 *exec_control, #define vmx_adjust_sec_exec_exiting(vmx, exec_control, lname, uname) \ vmx_adjust_sec_exec_control(vmx, exec_control, lname, uname, uname##_EXITING, true) -static void vmx_compute_secondary_exec_control(struct vcpu_vmx *vmx) +u32 vmx_secondary_exec_control(struct vcpu_vmx *vmx) { struct kvm_vcpu *vcpu = &vmx->vcpu; @@ -4298,7 +4298,7 @@ static void vmx_compute_secondary_exec_control(struct vcpu_vmx *vmx) if (!vcpu->kvm->arch.bus_lock_detection_enabled) exec_control &= ~SECONDARY_EXEC_BUS_LOCK_DETECTION; - vmx->secondary_exec_control = exec_control; + return exec_control; } #define VMX_XSS_EXIT_BITMAP 0 @@ -4322,10 +4322,8 @@ static void init_vmcs(struct vcpu_vmx *vmx) exec_controls_set(vmx, vmx_exec_control(vmx)); - if (cpu_has_secondary_exec_ctrls()) { - vmx_compute_secondary_exec_control(vmx); - secondary_exec_controls_set(vmx, vmx->secondary_exec_control); - } + if (cpu_has_secondary_exec_ctrls()) + secondary_exec_controls_set(vmx, vmx_secondary_exec_control(vmx)); if (kvm_vcpu_apicv_active(&vmx->vcpu)) { vmcs_write64(EOI_EXIT_BITMAP0, 0); @@ -6992,7 +6990,7 @@ exit: return (cache << VMX_EPT_MT_EPTE_SHIFT) | ipat; } -static void vmcs_set_secondary_exec_control(struct vcpu_vmx *vmx) +static void vmcs_set_secondary_exec_control(struct vcpu_vmx *vmx, u32 new_ctl) { /* * These bits in the secondary execution controls field @@ -7006,7 +7004,6 @@ static void vmcs_set_secondary_exec_control(struct vcpu_vmx *vmx) SECONDARY_EXEC_VIRTUALIZE_APIC_ACCESSES | SECONDARY_EXEC_DESC; - u32 new_ctl = vmx->secondary_exec_control; u32 cur_ctl = secondary_exec_controls_get(vmx); secondary_exec_controls_set(vmx, (new_ctl & ~mask) | (cur_ctl & mask)); @@ -7151,10 +7148,9 @@ static void vmx_vcpu_after_set_cpuid(struct kvm_vcpu *vcpu) vmx_setup_uret_msrs(vmx); - if (cpu_has_secondary_exec_ctrls()) { - vmx_compute_secondary_exec_control(vmx); - vmcs_set_secondary_exec_control(vmx); - } + if (cpu_has_secondary_exec_ctrls()) + vmcs_set_secondary_exec_control(vmx, + vmx_secondary_exec_control(vmx)); if (nested_vmx_allowed(vcpu)) to_vmx(vcpu)->msr_ia32_feature_control_valid_bits |= |