| Message ID | 20230914044805.301390-35-xin3.li@intel.com (mailing list archive) |
|---|---|
| State | New, archived |
| Headers | show |
| Series | x86: enable FRED for x86-64 | expand |
On 9/14/23 06:48, Xin Li wrote: > 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@intel.com> > Signed-off-by: Xin Li <xin3.li@intel.com> Acked-by: Paolo Bonzini <pbonzini@redhat.com> > --- > 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); > } >
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); }