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2024-02-20 ea08eeccae9297f7aabd2ef7f0c2517ac4549acc

 kernel/arch/powerpc/kvm/book3s_xive.h
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@@ -1,9 +1,6 @@
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+/* SPDX-License-Identifier: GPL-2.0-only */
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 /*
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  * Copyright 2017 Benjamin Herrenschmidt, IBM Corporation
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- *
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- * This program is free software; you can redistribute it and/or modify
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- * it under the terms of the GNU General Public License, version 2, as
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- * published by the Free Software Foundation.
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  */
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 #ifndef _KVM_PPC_BOOK3S_XIVE_H
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@@ -11,6 +8,13 @@
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 #ifdef CONFIG_KVM_XICS
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 #include "book3s_xics.h"
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+
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+/*
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+ * The XIVE Interrupt source numbers are within the range 0 to
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+ * KVMPPC_XICS_NR_IRQS.
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+ */
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+#define KVMPPC_XIVE_FIRST_IRQ	0
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+#define KVMPPC_XIVE_NR_IRQS	KVMPPC_XICS_NR_IRQS
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 /*
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  * State for one guest irq source.
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@@ -54,6 +58,9 @@
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 	bool saved_p;
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 	bool saved_q;
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 	u8 saved_scan_prio;
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+
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+	/* Xive native */
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+	u32 eisn;			/* Guest Effective IRQ number */
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 };
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 /* Select the "right" interrupt (IPI vs. passthrough) */
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@@ -84,6 +91,11 @@
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 	struct kvmppc_xive_irq_state irq_state[KVMPPC_XICS_IRQ_PER_ICS];
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 };
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+struct kvmppc_xive;
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+
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+struct kvmppc_xive_ops {
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+	int (*reset_mapped)(struct kvm *kvm, unsigned long guest_irq);
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+};
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 struct kvmppc_xive {
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 	struct kvm *kvm;
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@@ -122,6 +134,14 @@
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 	/* Flags */
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 	u8	single_escalation;
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+
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+	/* Number of entries in the VP block */
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+	u32	nr_servers;
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+
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+	struct kvmppc_xive_ops *ops;
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+	struct address_space   *mapping;
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+	struct mutex mapping_lock;
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+	struct mutex lock;
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 };
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 #define KVMPPC_XIVE_Q_COUNT	8
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@@ -198,6 +218,23 @@
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 	return xive->src_blocks[bid];
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 }
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+static inline u32 kvmppc_xive_vp(struct kvmppc_xive *xive, u32 server)
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+{
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+	return xive->vp_base + kvmppc_pack_vcpu_id(xive->kvm, server);
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+}
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+
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+static inline bool kvmppc_xive_vp_in_use(struct kvm *kvm, u32 vp_id)
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+{
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+	struct kvm_vcpu *vcpu = NULL;
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+	int i;
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+
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+	kvm_for_each_vcpu(i, vcpu, kvm) {
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+		if (vcpu->arch.xive_vcpu && vp_id == vcpu->arch.xive_vcpu->vp_id)
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+			return true;
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+	}
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+	return false;
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+}
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+
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 /*
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  * Mapping between guest priorities and host priorities
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  * is as follow.
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@@ -248,5 +285,22 @@
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 extern int (*__xive_vm_h_cppr)(struct kvm_vcpu *vcpu, unsigned long cppr);
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 extern int (*__xive_vm_h_eoi)(struct kvm_vcpu *vcpu, unsigned long xirr);
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+/*
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+ * Common Xive routines for XICS-over-XIVE and XIVE native
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+ */
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+void kvmppc_xive_disable_vcpu_interrupts(struct kvm_vcpu *vcpu);
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+int kvmppc_xive_debug_show_queues(struct seq_file *m, struct kvm_vcpu *vcpu);
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+struct kvmppc_xive_src_block *kvmppc_xive_create_src_block(
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+	struct kvmppc_xive *xive, int irq);
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+void kvmppc_xive_free_sources(struct kvmppc_xive_src_block *sb);
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+int kvmppc_xive_select_target(struct kvm *kvm, u32 *server, u8 prio);
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+int kvmppc_xive_attach_escalation(struct kvm_vcpu *vcpu, u8 prio,
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+				  bool single_escalation);
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+struct kvmppc_xive *kvmppc_xive_get_device(struct kvm *kvm, u32 type);
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+void xive_cleanup_single_escalation(struct kvm_vcpu *vcpu,
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+				    struct kvmppc_xive_vcpu *xc, int irq);
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+int kvmppc_xive_compute_vp_id(struct kvmppc_xive *xive, u32 cpu, u32 *vp);
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+int kvmppc_xive_set_nr_servers(struct kvmppc_xive *xive, u64 addr);
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+
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 #endif /* CONFIG_KVM_XICS */
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 #endif /* _KVM_PPC_BOOK3S_XICS_H */