1 files changed, 133 insertions, 7 deletions

diff --git a/arch/x86/kvm/xen.h b/arch/x86/kvm/xen.h
index 463a7844a8ca..59e6128a7bd3 100644
--- a/arch/x86/kvm/xen.h
+++ b/arch/x86/kvm/xen.h
@@ -9,56 +9,142 @@
 #ifndef __ARCH_X86_KVM_XEN_H__
 #define __ARCH_X86_KVM_XEN_H__
 
+#include <asm/xen/cpuid.h>
+#include <asm/xen/hypervisor.h>
+
 #ifdef CONFIG_KVM_XEN
 #include <linux/jump_label_ratelimit.h>
 
 extern struct static_key_false_deferred kvm_xen_enabled;
 
 int __kvm_xen_has_interrupt(struct kvm_vcpu *vcpu);
+void kvm_xen_inject_pending_events(struct kvm_vcpu *vcpu);
+void kvm_xen_inject_vcpu_vector(struct kvm_vcpu *vcpu);
 int kvm_xen_vcpu_set_attr(struct kvm_vcpu *vcpu, struct kvm_xen_vcpu_attr *data);
 int kvm_xen_vcpu_get_attr(struct kvm_vcpu *vcpu, struct kvm_xen_vcpu_attr *data);
 int kvm_xen_hvm_set_attr(struct kvm *kvm, struct kvm_xen_hvm_attr *data);
 int kvm_xen_hvm_get_attr(struct kvm *kvm, struct kvm_xen_hvm_attr *data);
+int kvm_xen_hvm_evtchn_send(struct kvm *kvm, struct kvm_irq_routing_xen_evtchn *evt);
 int kvm_xen_write_hypercall_page(struct kvm_vcpu *vcpu, u64 data);
 int kvm_xen_hvm_config(struct kvm *kvm, struct kvm_xen_hvm_config *xhc);
+void kvm_xen_init_vm(struct kvm *kvm);
 void kvm_xen_destroy_vm(struct kvm *kvm);
+void kvm_xen_init_vcpu(struct kvm_vcpu *vcpu);
+void kvm_xen_destroy_vcpu(struct kvm_vcpu *vcpu);
+int kvm_xen_set_evtchn_fast(struct kvm_xen_evtchn *xe,
+			    struct kvm *kvm);
+int kvm_xen_setup_evtchn(struct kvm *kvm,
+			 struct kvm_kernel_irq_routing_entry *e,
+			 const struct kvm_irq_routing_entry *ue);
+
+static inline void kvm_xen_sw_enable_lapic(struct kvm_vcpu *vcpu)
+{
+	/*
+	 * The local APIC is being enabled. If the per-vCPU upcall vector is
+	 * set and the vCPU's evtchn_upcall_pending flag is set, inject the
+	 * interrupt.
+	 */
+	if (static_branch_unlikely(&kvm_xen_enabled.key) &&
+	    vcpu->arch.xen.vcpu_info_cache.active &&
+	    vcpu->arch.xen.upcall_vector && __kvm_xen_has_interrupt(vcpu))
+		kvm_xen_inject_vcpu_vector(vcpu);
+}
+
+static inline bool kvm_xen_is_tsc_leaf(struct kvm_vcpu *vcpu, u32 function)
+{
+	return static_branch_unlikely(&kvm_xen_enabled.key) &&
+	       vcpu->arch.xen.cpuid.base &&
+	       function <= vcpu->arch.xen.cpuid.limit &&
+	       function == (vcpu->arch.xen.cpuid.base | XEN_CPUID_LEAF(3));
+}
 
 static inline bool kvm_xen_msr_enabled(struct kvm *kvm)
 {
 	return static_branch_unlikely(&kvm_xen_enabled.key) &&
-		kvm->arch.xen_hvm_config.msr;
+		kvm->arch.xen.hvm_config.msr;
+}
+
+static inline bool kvm_xen_is_hypercall_page_msr(struct kvm *kvm, u32 msr)
+{
+	if (!static_branch_unlikely(&kvm_xen_enabled.key))
+		return false;
+
+	return msr && msr == kvm->arch.xen.hvm_config.msr;
 }
 
 static inline bool kvm_xen_hypercall_enabled(struct kvm *kvm)
 {
 	return static_branch_unlikely(&kvm_xen_enabled.key) &&
-		(kvm->arch.xen_hvm_config.flags &
+		(kvm->arch.xen.hvm_config.flags &
 		 KVM_XEN_HVM_CONFIG_INTERCEPT_HCALL);
 }
 
 static inline int kvm_xen_has_interrupt(struct kvm_vcpu *vcpu)
 {
 	if (static_branch_unlikely(&kvm_xen_enabled.key) &&
-	    vcpu->arch.xen.vcpu_info_set && vcpu->kvm->arch.xen.upcall_vector)
+	    vcpu->arch.xen.vcpu_info_cache.active &&
+	    vcpu->kvm->arch.xen.upcall_vector)
 		return __kvm_xen_has_interrupt(vcpu);
 
 	return 0;
 }
+
+static inline bool kvm_xen_has_pending_events(struct kvm_vcpu *vcpu)
+{
+	return static_branch_unlikely(&kvm_xen_enabled.key) &&
+		vcpu->arch.xen.evtchn_pending_sel;
+}
+
+static inline bool kvm_xen_timer_enabled(struct kvm_vcpu *vcpu)
+{
+	return !!vcpu->arch.xen.timer_virq;
+}
+
+static inline int kvm_xen_has_pending_timer(struct kvm_vcpu *vcpu)
+{
+	if (kvm_xen_hypercall_enabled(vcpu->kvm) && kvm_xen_timer_enabled(vcpu))
+		return atomic_read(&vcpu->arch.xen.timer_pending);
+
+	return 0;
+}
+
+void kvm_xen_inject_timer_irqs(struct kvm_vcpu *vcpu);
 #else
 static inline int kvm_xen_write_hypercall_page(struct kvm_vcpu *vcpu, u64 data)
 {
 	return 1;
 }
 
+static inline void kvm_xen_init_vm(struct kvm *kvm)
+{
+}
+
 static inline void kvm_xen_destroy_vm(struct kvm *kvm)
 {
 }
 
+static inline void kvm_xen_init_vcpu(struct kvm_vcpu *vcpu)
+{
+}
+
+static inline void kvm_xen_destroy_vcpu(struct kvm_vcpu *vcpu)
+{
+}
+
+static inline void kvm_xen_sw_enable_lapic(struct kvm_vcpu *vcpu)
+{
+}
+
 static inline bool kvm_xen_msr_enabled(struct kvm *kvm)
 {
 	return false;
 }
 
+static inline bool kvm_xen_is_hypercall_page_msr(struct kvm *kvm, u32 msr)
+{
+	return false;
+}
+
 static inline bool kvm_xen_hypercall_enabled(struct kvm *kvm)
 {
 	return false;
@@ -68,6 +154,34 @@ static inline int kvm_xen_has_interrupt(struct kvm_vcpu *vcpu)
 {
 	return 0;
 }
+
+static inline void kvm_xen_inject_pending_events(struct kvm_vcpu *vcpu)
+{
+}
+
+static inline bool kvm_xen_has_pending_events(struct kvm_vcpu *vcpu)
+{
+	return false;
+}
+
+static inline int kvm_xen_has_pending_timer(struct kvm_vcpu *vcpu)
+{
+	return 0;
+}
+
+static inline void kvm_xen_inject_timer_irqs(struct kvm_vcpu *vcpu)
+{
+}
+
+static inline bool kvm_xen_timer_enabled(struct kvm_vcpu *vcpu)
+{
+	return false;
+}
+
+static inline bool kvm_xen_is_tsc_leaf(struct kvm_vcpu *vcpu, u32 function)
+{
+	return false;
+}
 #endif
 
 int kvm_xen_hypercall(struct kvm_vcpu *vcpu);
@@ -76,11 +190,11 @@ int kvm_xen_hypercall(struct kvm_vcpu *vcpu);
 #include <asm/xen/interface.h>
 #include <xen/interface/vcpu.h>
 
-void kvm_xen_update_runstate_guest(struct kvm_vcpu *vcpu, int state);
+void kvm_xen_update_runstate(struct kvm_vcpu *vcpu, int state);
 
 static inline void kvm_xen_runstate_set_running(struct kvm_vcpu *vcpu)
 {
-	kvm_xen_update_runstate_guest(vcpu, RUNSTATE_running);
+	kvm_xen_update_runstate(vcpu, RUNSTATE_running);
 }
 
 static inline void kvm_xen_runstate_set_preempted(struct kvm_vcpu *vcpu)
@@ -92,8 +206,10 @@ static inline void kvm_xen_runstate_set_preempted(struct kvm_vcpu *vcpu)
 	 * behalf of the vCPU. Only if the VMM does actually block
 	 * does it need to enter RUNSTATE_blocked.
 	 */
-	if (vcpu->preempted)
-		kvm_xen_update_runstate_guest(vcpu, RUNSTATE_runnable);
+	if (WARN_ON_ONCE(!vcpu->preempted))
+		return;
+
+	kvm_xen_update_runstate(vcpu, RUNSTATE_runnable);
 }
 
 /* 32-bit compatibility definitions, also used natively in 32-bit build */
@@ -129,10 +245,20 @@ struct compat_shared_info {
 	struct compat_arch_shared_info arch;
 };
 
+#define COMPAT_EVTCHN_2L_NR_CHANNELS (8 *				\
+				      sizeof_field(struct compat_shared_info, \
+						   evtchn_pending))
 struct compat_vcpu_runstate_info {
     int state;
     uint64_t state_entry_time;
     uint64_t time[4];
 } __attribute__((packed));
 
+struct compat_sched_poll {
+	/* This is actually a guest virtual address which points to ports. */
+	uint32_t ports;
+	unsigned int nr_ports;
+	uint64_t timeout;
+};
+
 #endif /* __ARCH_X86_KVM_XEN_H__ */