mirror of
https://github.com/clearlinux/kvmtool.git
synced 2026-06-16 02:15:47 +00:00
Will Deacon
9dc5430ce7
All architectures are now doing the same thing for irq__alloc_line: 1. Initialise a global counter to some fixed offset 2. Return the current value of the counter and increment it This is better off in core code, with each architecture specifying the initial offset, which is specific to the interrupt controller being used by the guest. Signed-off-by: Will Deacon <will.deacon@arm.com> Signed-off-by: Pekka Enberg <penberg@kernel.org>
102 lines
2.1 KiB
C
102 lines
2.1 KiB
C
#include "kvm/irq.h"
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#include "kvm/kvm.h"
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#include "kvm/util.h"
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#include <linux/types.h>
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#include <linux/rbtree.h>
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#include <linux/list.h>
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#include <linux/kvm.h>
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#include <sys/ioctl.h>
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#include <stddef.h>
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#include <stdlib.h>
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#define IRQ_MAX_GSI 64
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#define IRQCHIP_MASTER 0
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#define IRQCHIP_SLAVE 1
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#define IRQCHIP_IOAPIC 2
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/* First 24 GSIs are routed between IRQCHIPs and IOAPICs */
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static u32 gsi = 24;
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struct kvm_irq_routing *irq_routing;
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static int irq__add_routing(u32 gsi, u32 type, u32 irqchip, u32 pin)
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{
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if (gsi >= IRQ_MAX_GSI)
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return -ENOSPC;
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irq_routing->entries[irq_routing->nr++] =
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(struct kvm_irq_routing_entry) {
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.gsi = gsi,
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.type = type,
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.u.irqchip.irqchip = irqchip,
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.u.irqchip.pin = pin,
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};
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return 0;
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}
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int irq__init(struct kvm *kvm)
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{
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int i, r;
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irq_routing = calloc(sizeof(struct kvm_irq_routing) +
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IRQ_MAX_GSI * sizeof(struct kvm_irq_routing_entry), 1);
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if (irq_routing == NULL)
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return -ENOMEM;
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/* Hook first 8 GSIs to master IRQCHIP */
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for (i = 0; i < 8; i++)
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if (i != 2)
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irq__add_routing(i, KVM_IRQ_ROUTING_IRQCHIP, IRQCHIP_MASTER, i);
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/* Hook next 8 GSIs to slave IRQCHIP */
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for (i = 8; i < 16; i++)
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irq__add_routing(i, KVM_IRQ_ROUTING_IRQCHIP, IRQCHIP_SLAVE, i - 8);
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/* Last but not least, IOAPIC */
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for (i = 0; i < 24; i++) {
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if (i == 0)
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irq__add_routing(i, KVM_IRQ_ROUTING_IRQCHIP, IRQCHIP_IOAPIC, 2);
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else if (i != 2)
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irq__add_routing(i, KVM_IRQ_ROUTING_IRQCHIP, IRQCHIP_IOAPIC, i);
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}
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r = ioctl(kvm->vm_fd, KVM_SET_GSI_ROUTING, irq_routing);
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if (r) {
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free(irq_routing);
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return errno;
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}
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return 0;
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}
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dev_base_init(irq__init);
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int irq__exit(struct kvm *kvm)
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{
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free(irq_routing);
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return 0;
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}
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dev_base_exit(irq__exit);
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int irq__add_msix_route(struct kvm *kvm, struct msi_msg *msg)
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{
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int r;
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irq_routing->entries[irq_routing->nr++] =
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(struct kvm_irq_routing_entry) {
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.gsi = gsi,
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.type = KVM_IRQ_ROUTING_MSI,
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.u.msi.address_hi = msg->address_hi,
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.u.msi.address_lo = msg->address_lo,
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.u.msi.data = msg->data,
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};
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r = ioctl(kvm->vm_fd, KVM_SET_GSI_ROUTING, irq_routing);
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if (r)
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return r;
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return gsi++;
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}
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