45e96ea6b3
When the guest accesses I/O memory this will create data abort exceptions and they are handled by decoding the HSR information (physical address, read/write, length, register) and forwarding reads and writes to QEMU which performs the device emulation. Certain classes of load/store operations do not support the syndrome information provided in the HSR. We don't support decoding these (patches are available elsewhere), so we report an error to user space in this case. This requires changing the general flow somewhat since new calls to run the VCPU must check if there's a pending MMIO load and perform the write after userspace has made the data available. Reviewed-by: Will Deacon <will.deacon@arm.com> Reviewed-by: Marcelo Tosatti <mtosatti@redhat.com> Signed-off-by: Rusty Russell <rusty@rustcorp.com.au> Signed-off-by: Marc Zyngier <marc.zyngier@arm.com> Signed-off-by: Christoffer Dall <c.dall@virtualopensystems.com>
235 lines
5.1 KiB
C
235 lines
5.1 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_guest_fault,
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TP_PROTO(unsigned long vcpu_pc, unsigned long hsr,
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unsigned long hxfar,
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unsigned long long ipa),
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TP_ARGS(vcpu_pc, hsr, hxfar, ipa),
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TP_STRUCT__entry(
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__field( unsigned long, vcpu_pc )
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__field( unsigned long, hsr )
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__field( unsigned long, hxfar )
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__field( unsigned long long, ipa )
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),
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TP_fast_assign(
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__entry->vcpu_pc = vcpu_pc;
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__entry->hsr = hsr;
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__entry->hxfar = hxfar;
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__entry->ipa = ipa;
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),
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TP_printk("guest fault at PC %#08lx (hxfar %#08lx, "
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"ipa %#16llx, hsr %#08lx",
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__entry->vcpu_pc, __entry->hxfar,
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__entry->ipa, __entry->hsr)
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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_mmio_emulate,
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TP_PROTO(unsigned long vcpu_pc, unsigned long instr,
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unsigned long cpsr),
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TP_ARGS(vcpu_pc, instr, cpsr),
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TP_STRUCT__entry(
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__field( unsigned long, vcpu_pc )
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__field( unsigned long, instr )
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__field( unsigned long, cpsr )
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),
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TP_fast_assign(
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__entry->vcpu_pc = vcpu_pc;
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__entry->instr = instr;
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__entry->cpsr = cpsr;
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),
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TP_printk("Emulate MMIO at: 0x%08lx (instr: %08lx, cpsr: %08lx)",
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__entry->vcpu_pc, __entry->instr, __entry->cpsr)
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);
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/* Architecturally implementation defined CP15 register access */
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TRACE_EVENT(kvm_emulate_cp15_imp,
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TP_PROTO(unsigned long Op1, unsigned long Rt1, unsigned long CRn,
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unsigned long CRm, unsigned long Op2, bool is_write),
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TP_ARGS(Op1, Rt1, CRn, CRm, Op2, is_write),
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TP_STRUCT__entry(
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__field( unsigned int, Op1 )
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__field( unsigned int, Rt1 )
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__field( unsigned int, CRn )
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__field( unsigned int, CRm )
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__field( unsigned int, Op2 )
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__field( bool, is_write )
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),
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TP_fast_assign(
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__entry->is_write = is_write;
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__entry->Op1 = Op1;
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__entry->Rt1 = Rt1;
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__entry->CRn = CRn;
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__entry->CRm = CRm;
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__entry->Op2 = Op2;
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),
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TP_printk("Implementation defined CP15: %s\tp15, %u, r%u, c%u, c%u, %u",
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(__entry->is_write) ? "mcr" : "mrc",
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__entry->Op1, __entry->Rt1, __entry->CRn,
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__entry->CRm, __entry->Op2)
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);
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TRACE_EVENT(kvm_wfi,
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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("guest executed wfi at: 0x%08lx", __entry->vcpu_pc)
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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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TRACE_EVENT(kvm_hvc,
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TP_PROTO(unsigned long vcpu_pc, unsigned long r0, unsigned long imm),
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TP_ARGS(vcpu_pc, r0, imm),
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TP_STRUCT__entry(
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__field( unsigned long, vcpu_pc )
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__field( unsigned long, r0 )
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__field( unsigned long, imm )
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),
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TP_fast_assign(
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__entry->vcpu_pc = vcpu_pc;
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__entry->r0 = r0;
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__entry->imm = imm;
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),
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TP_printk("HVC at 0x%08lx (r0: 0x%08lx, imm: 0x%lx",
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__entry->vcpu_pc, __entry->r0, __entry->imm)
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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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