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authorDaniel Baumann <daniel.baumann@progress-linux.org>2024-04-07 18:49:45 +0000
committerDaniel Baumann <daniel.baumann@progress-linux.org>2024-04-07 18:49:45 +0000
commit2c3c1048746a4622d8c89a29670120dc8fab93c4 (patch)
tree848558de17fb3008cdf4d861b01ac7781903ce39 /arch/x86/kvm/irq.h
parentInitial commit. (diff)
downloadlinux-2c3c1048746a4622d8c89a29670120dc8fab93c4.tar.xz
linux-2c3c1048746a4622d8c89a29670120dc8fab93c4.zip
Adding upstream version 6.1.76.upstream/6.1.76upstream
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to 'arch/x86/kvm/irq.h')
-rw-r--r--arch/x86/kvm/irq.h114
1 files changed, 114 insertions, 0 deletions
diff --git a/arch/x86/kvm/irq.h b/arch/x86/kvm/irq.h
new file mode 100644
index 000000000..c2d7cfe82
--- /dev/null
+++ b/arch/x86/kvm/irq.h
@@ -0,0 +1,114 @@
+/* SPDX-License-Identifier: GPL-2.0-only */
+/*
+ * irq.h: in kernel interrupt controller related definitions
+ * Copyright (c) 2007, Intel Corporation.
+ *
+ * Authors:
+ * Yaozu (Eddie) Dong <Eddie.dong@intel.com>
+ */
+
+#ifndef __IRQ_H
+#define __IRQ_H
+
+#include <linux/mm_types.h>
+#include <linux/hrtimer.h>
+#include <linux/kvm_host.h>
+#include <linux/spinlock.h>
+
+#include <kvm/iodev.h>
+#include "lapic.h"
+
+#define PIC_NUM_PINS 16
+#define SELECT_PIC(irq) \
+ ((irq) < 8 ? KVM_IRQCHIP_PIC_MASTER : KVM_IRQCHIP_PIC_SLAVE)
+
+struct kvm;
+struct kvm_vcpu;
+
+struct kvm_kpic_state {
+ u8 last_irr; /* edge detection */
+ u8 irr; /* interrupt request register */
+ u8 imr; /* interrupt mask register */
+ u8 isr; /* interrupt service register */
+ u8 priority_add; /* highest irq priority */
+ u8 irq_base;
+ u8 read_reg_select;
+ u8 poll;
+ u8 special_mask;
+ u8 init_state;
+ u8 auto_eoi;
+ u8 rotate_on_auto_eoi;
+ u8 special_fully_nested_mode;
+ u8 init4; /* true if 4 byte init */
+ u8 elcr; /* PIIX edge/trigger selection */
+ u8 elcr_mask;
+ u8 isr_ack; /* interrupt ack detection */
+ struct kvm_pic *pics_state;
+};
+
+struct kvm_pic {
+ spinlock_t lock;
+ bool wakeup_needed;
+ unsigned pending_acks;
+ struct kvm *kvm;
+ struct kvm_kpic_state pics[2]; /* 0 is master pic, 1 is slave pic */
+ int output; /* intr from master PIC */
+ struct kvm_io_device dev_master;
+ struct kvm_io_device dev_slave;
+ struct kvm_io_device dev_elcr;
+ unsigned long irq_states[PIC_NUM_PINS];
+};
+
+int kvm_pic_init(struct kvm *kvm);
+void kvm_pic_destroy(struct kvm *kvm);
+int kvm_pic_read_irq(struct kvm *kvm);
+void kvm_pic_update_irq(struct kvm_pic *s);
+
+static inline int irqchip_split(struct kvm *kvm)
+{
+ int mode = kvm->arch.irqchip_mode;
+
+ /* Matches smp_wmb() when setting irqchip_mode */
+ smp_rmb();
+ return mode == KVM_IRQCHIP_SPLIT;
+}
+
+static inline int irqchip_kernel(struct kvm *kvm)
+{
+ int mode = kvm->arch.irqchip_mode;
+
+ /* Matches smp_wmb() when setting irqchip_mode */
+ smp_rmb();
+ return mode == KVM_IRQCHIP_KERNEL;
+}
+
+static inline int pic_in_kernel(struct kvm *kvm)
+{
+ return irqchip_kernel(kvm);
+}
+
+static inline int irqchip_in_kernel(struct kvm *kvm)
+{
+ int mode = kvm->arch.irqchip_mode;
+
+ /* Matches smp_wmb() when setting irqchip_mode */
+ smp_rmb();
+ return mode != KVM_IRQCHIP_NONE;
+}
+
+void kvm_inject_pending_timer_irqs(struct kvm_vcpu *vcpu);
+void kvm_inject_apic_timer_irqs(struct kvm_vcpu *vcpu);
+void kvm_apic_nmi_wd_deliver(struct kvm_vcpu *vcpu);
+void __kvm_migrate_apic_timer(struct kvm_vcpu *vcpu);
+void __kvm_migrate_pit_timer(struct kvm_vcpu *vcpu);
+void __kvm_migrate_timers(struct kvm_vcpu *vcpu);
+
+int apic_has_pending_timer(struct kvm_vcpu *vcpu);
+
+int kvm_setup_default_irq_routing(struct kvm *kvm);
+int kvm_setup_empty_irq_routing(struct kvm *kvm);
+int kvm_irq_delivery_to_apic(struct kvm *kvm, struct kvm_lapic *src,
+ struct kvm_lapic_irq *irq,
+ struct dest_map *dest_map);
+
+#endif