KVM: VMX: Call fred_entry_from_kvm() for IRQ/NMI handling

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

Signed-off-by: Xin Li <xin3.li@intel.com>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: Borislav Petkov (AMD) <bp@alien8.de>
Tested-by: Shan Kang <shan.kang@intel.com>
Acked-by: Paolo Bonzini <pbonzini@redhat.com>
Link: https://lore.kernel.org/r/20231205105030.8698-33-xin3.li@intel.com

diff --git a/arch/x86/kvm/vmx/vmx.c b/arch/x86/kvm/vmx/vmx.c
index e262bc2ba4e569983a94c3db5c13e1f0dabd9951..cce92f701deeed932099b1a24cc4616101846405 100644 (file)
--- 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>
@@ -6960,14 +6961,16 @@ 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;
@@ -7260,7 +7263,10 @@ 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);
        }