86ce85352f
All interrupt injection is now based on the VM ioctl KVM_IRQ_LINE. This
works semantically well for the GIC as we in fact raise/lower a line on
a machine component (the gic). The IOCTL uses the follwing struct.
struct kvm_irq_level {
union {
__u32 irq; /* GSI */
__s32 status; /* not used for KVM_IRQ_LEVEL */
};
__u32 level; /* 0 or 1 */
};
ARM can signal an interrupt either at the CPU level, or at the in-kernel irqchip
(GIC), and for in-kernel irqchip can tell the GIC to use PPIs designated for
specific cpus. The irq field is interpreted like this:
bits: | 31 ... 24 | 23 ... 16 | 15 ... 0 |
field: | irq_type | vcpu_index | irq_number |
The irq_type field has the following values:
- irq_type[0]: out-of-kernel GIC: irq_number 0 is IRQ, irq_number 1 is FIQ
- irq_type[1]: in-kernel GIC: SPI, irq_number between 32 and 1019 (incl.)
(the vcpu_index field is ignored)
- irq_type[2]: in-kernel GIC: PPI, irq_number between 16 and 31 (incl.)
The irq_number thus corresponds to the irq ID in as in the GICv2 specs.
This is documented in Documentation/kvm/api.txt.
Reviewed-by: Will Deacon <will.deacon@arm.com>
Reviewed-by: Marcelo Tosatti <mtosatti@redhat.com>
Signed-off-by: Christoffer Dall <c.dall@virtualopensystems.com>
124 lines
2.4 KiB
C
124 lines
2.4 KiB
C
#if !defined(_TRACE_KVM_H) || defined(TRACE_HEADER_MULTI_READ)
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#define _TRACE_KVM_H
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#include <linux/tracepoint.h>
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#undef TRACE_SYSTEM
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#define TRACE_SYSTEM kvm
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/*
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* Tracepoints for entry/exit to guest
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*/
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TRACE_EVENT(kvm_entry,
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TP_PROTO(unsigned long vcpu_pc),
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TP_ARGS(vcpu_pc),
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TP_STRUCT__entry(
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__field( unsigned long, vcpu_pc )
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),
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TP_fast_assign(
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__entry->vcpu_pc = vcpu_pc;
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),
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TP_printk("PC: 0x%08lx", __entry->vcpu_pc)
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);
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TRACE_EVENT(kvm_exit,
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TP_PROTO(unsigned long vcpu_pc),
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TP_ARGS(vcpu_pc),
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TP_STRUCT__entry(
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__field( unsigned long, vcpu_pc )
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),
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TP_fast_assign(
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__entry->vcpu_pc = vcpu_pc;
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),
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TP_printk("PC: 0x%08lx", __entry->vcpu_pc)
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);
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TRACE_EVENT(kvm_irq_line,
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TP_PROTO(unsigned int type, int vcpu_idx, int irq_num, int level),
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TP_ARGS(type, vcpu_idx, irq_num, level),
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TP_STRUCT__entry(
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__field( unsigned int, type )
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__field( int, vcpu_idx )
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__field( int, irq_num )
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__field( int, level )
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),
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TP_fast_assign(
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__entry->type = type;
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__entry->vcpu_idx = vcpu_idx;
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__entry->irq_num = irq_num;
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__entry->level = level;
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),
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TP_printk("Inject %s interrupt (%d), vcpu->idx: %d, num: %d, level: %d",
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(__entry->type == KVM_ARM_IRQ_TYPE_CPU) ? "CPU" :
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(__entry->type == KVM_ARM_IRQ_TYPE_PPI) ? "VGIC PPI" :
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(__entry->type == KVM_ARM_IRQ_TYPE_SPI) ? "VGIC SPI" : "UNKNOWN",
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__entry->type, __entry->vcpu_idx, __entry->irq_num, __entry->level)
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);
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TRACE_EVENT(kvm_unmap_hva,
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TP_PROTO(unsigned long hva),
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TP_ARGS(hva),
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TP_STRUCT__entry(
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__field( unsigned long, hva )
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),
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TP_fast_assign(
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__entry->hva = hva;
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),
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TP_printk("mmu notifier unmap hva: %#08lx", __entry->hva)
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);
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TRACE_EVENT(kvm_unmap_hva_range,
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TP_PROTO(unsigned long start, unsigned long end),
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TP_ARGS(start, end),
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TP_STRUCT__entry(
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__field( unsigned long, start )
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__field( unsigned long, end )
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),
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TP_fast_assign(
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__entry->start = start;
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__entry->end = end;
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),
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TP_printk("mmu notifier unmap range: %#08lx -- %#08lx",
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__entry->start, __entry->end)
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);
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TRACE_EVENT(kvm_set_spte_hva,
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TP_PROTO(unsigned long hva),
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TP_ARGS(hva),
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TP_STRUCT__entry(
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__field( unsigned long, hva )
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),
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TP_fast_assign(
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__entry->hva = hva;
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),
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TP_printk("mmu notifier set pte hva: %#08lx", __entry->hva)
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);
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#endif /* _TRACE_KVM_H */
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#undef TRACE_INCLUDE_PATH
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#define TRACE_INCLUDE_PATH arch/arm/kvm
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#undef TRACE_INCLUDE_FILE
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#define TRACE_INCLUDE_FILE trace
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/* This part must be outside protection */
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#include <trace/define_trace.h>
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