Re: [PATCH v1 14/23] KVM: VMX: Dump FRED context in dump_vmcs()

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On 8.11.23 г. 20:29 ч., Xin Li wrote:
Add FRED related VMCS fields to dump_vmcs() to have it dump FRED context.

Tested-by: Shan Kang <shan.kang@xxxxxxxxx>
Signed-off-by: Xin Li <xin3.li@xxxxxxxxx>
---
  arch/x86/kvm/vmx/vmx.c | 48 ++++++++++++++++++++++++++++++++++++------
  1 file changed, 41 insertions(+), 7 deletions(-)

diff --git a/arch/x86/kvm/vmx/vmx.c b/arch/x86/kvm/vmx/vmx.c
index 518e68ee5a0d..b826dc188fc7 100644
--- a/arch/x86/kvm/vmx/vmx.c
+++ b/arch/x86/kvm/vmx/vmx.c
@@ -6429,7 +6429,7 @@ void dump_vmcs(struct kvm_vcpu *vcpu)
  	struct vcpu_vmx *vmx = to_vmx(vcpu);
  	u32 vmentry_ctl, vmexit_ctl;
  	u32 cpu_based_exec_ctrl, pin_based_exec_ctrl, secondary_exec_control;
-	u64 tertiary_exec_control;
+	u64 tertiary_exec_control, secondary_vmexit_ctl;
  	unsigned long cr4;
  	int efer_slot;
@@ -6440,6 +6440,8 @@ void dump_vmcs(struct kvm_vcpu *vcpu) vmentry_ctl = vmcs_read32(VM_ENTRY_CONTROLS);
  	vmexit_ctl = vmcs_read32(VM_EXIT_CONTROLS);
+	secondary_vmexit_ctl = cpu_has_secondary_vmexit_ctrls() ?
+			       vmcs_read64(SECONDARY_VM_EXIT_CONTROLS) : 0;
  	cpu_based_exec_ctrl = vmcs_read32(CPU_BASED_VM_EXEC_CONTROL);
  	pin_based_exec_ctrl = vmcs_read32(PIN_BASED_VM_EXEC_CONTROL);
  	cr4 = vmcs_readl(GUEST_CR4);
@@ -6486,6 +6488,19 @@ void dump_vmcs(struct kvm_vcpu *vcpu)
  	vmx_dump_sel("LDTR:", GUEST_LDTR_SELECTOR);
  	vmx_dump_dtsel("IDTR:", GUEST_IDTR_LIMIT);
  	vmx_dump_sel("TR:  ", GUEST_TR_SELECTOR);
+#ifdef CONFIG_X86_64
+	if (cpu_feature_enabled(X86_FEATURE_FRED)) {

Shouldn't this be gated on whether FRED is enabled in kvm aka the CPUID bit is enumerated ?

<snip>




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