[PATCH v12 34/37] KVM: VMX: Call fred_entry_from_kvm() for IRQ/NMI handling

[Xin Li <xin3.li@xxxxxxxxx>]

When FRED is enabled, call fred_entry_from_kvm() to handle IRQ/NMI in
IRQ/NMI induced VM exits.

Tested-by: Shan Kang <shan.kang@xxxxxxxxx>
Signed-off-by: Xin Li <xin3.li@xxxxxxxxx>
Acked-by: Paolo Bonzini <pbonzini@xxxxxxxxxx>
---
 arch/x86/kvm/vmx/vmx.c | 12 +++++++++---
 1 file changed, 9 insertions(+), 3 deletions(-)

diff --git a/arch/x86/kvm/vmx/vmx.c b/arch/x86/kvm/vmx/vmx.c
index 72e3943f3693..db55b8418fa3 100644
--- a/arch/x86/kvm/vmx/vmx.c
+++ b/arch/x86/kvm/vmx/vmx.c
@@ -38,6 +38,7 @@
 #include <asm/desc.h>
 #include <asm/fpu/api.h>
 #include <asm/fpu/xstate.h>
+#include <asm/fred.h>
 #include <asm/idtentry.h>
 #include <asm/io.h>
 #include <asm/irq_remapping.h>
@@ -6962,14 +6963,16 @@ static void handle_external_interrupt_irqoff(struct 
kvm_vcpu *vcpu)
 {
        u32 intr_info = vmx_get_intr_info(vcpu);
        unsigned int vector = intr_info & INTR_INFO_VECTOR_MASK;
-       gate_desc *desc = (gate_desc *)host_idt_base + vector;
 
        if (KVM_BUG(!is_external_intr(intr_info), vcpu->kvm,
            "unexpected VM-Exit interrupt info: 0x%x", intr_info))
                return;
 
        kvm_before_interrupt(vcpu, KVM_HANDLING_IRQ);
-       vmx_do_interrupt_irqoff(gate_offset(desc));
+       if (cpu_feature_enabled(X86_FEATURE_FRED))
+               fred_entry_from_kvm(EVENT_TYPE_EXTINT, vector);
+       else
+               vmx_do_interrupt_irqoff(gate_offset((gate_desc *)host_idt_base 
+ vector));
        kvm_after_interrupt(vcpu);
 
        vcpu->arch.at_instruction_boundary = true;
@@ -7262,7 +7265,10 @@ static noinstr void vmx_vcpu_enter_exit(struct kvm_vcpu 
*vcpu,
        if ((u16)vmx->exit_reason.basic == EXIT_REASON_EXCEPTION_NMI &&
            is_nmi(vmx_get_intr_info(vcpu))) {
                kvm_before_interrupt(vcpu, KVM_HANDLING_NMI);
-               vmx_do_nmi_irqoff();
+               if (cpu_feature_enabled(X86_FEATURE_FRED))
+                       fred_entry_from_kvm(EVENT_TYPE_NMI, NMI_VECTOR);
+               else
+                       vmx_do_nmi_irqoff();
                kvm_after_interrupt(vcpu);
        }
 
-- 
2.34.1