mirror of
https://github.com/FEX-Emu/linux.git
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35307b9a5f
Until now, KVM/arm didn't care much for page aging (who was swapping anyway?), and simply provided empty hooks to the core KVM code. With server-type systems now being available, things are quite different. This patch implements very simple support for page aging, by clearing the Access flag in the Stage-2 page tables. On access fault, the current fault handling will write the PTE or PMD again, putting the Access flag back on. It should be possible to implement a much faster handling for Access faults, but that's left for a later patch. With this in place, performance in VMs is degraded much more gracefully. Signed-off-by: Marc Zyngier <marc.zyngier@arm.com> Acked-by: Christoffer Dall <christoffer.dall@linaro.org> Signed-off-by: Christoffer Dall <christoffer.dall@linaro.org>
314 lines
6.8 KiB
C
314 lines
6.8 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 int exit_reason, unsigned long vcpu_pc),
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TP_ARGS(exit_reason, vcpu_pc),
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TP_STRUCT__entry(
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__field( unsigned int, exit_reason )
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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->exit_reason = exit_reason;
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__entry->vcpu_pc = vcpu_pc;
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),
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TP_printk("HSR_EC: 0x%04x, PC: 0x%08lx",
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__entry->exit_reason,
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__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("ipa %#llx, hsr %#08lx, hxfar %#08lx, pc %#08lx",
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__entry->ipa, __entry->hsr,
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__entry->hxfar, __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_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_wfx,
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TP_PROTO(unsigned long vcpu_pc, bool is_wfe),
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TP_ARGS(vcpu_pc, is_wfe),
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TP_STRUCT__entry(
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__field( unsigned long, vcpu_pc )
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__field( bool, is_wfe )
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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->is_wfe = is_wfe;
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),
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TP_printk("guest executed wf%c at: 0x%08lx",
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__entry->is_wfe ? 'e' : 'i', __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_age_hva,
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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 age hva: %#08lx -- %#08lx",
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__entry->start, __entry->end)
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);
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TRACE_EVENT(kvm_test_age_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 test age 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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TRACE_EVENT(kvm_set_way_flush,
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TP_PROTO(unsigned long vcpu_pc, bool cache),
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TP_ARGS(vcpu_pc, cache),
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TP_STRUCT__entry(
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__field( unsigned long, vcpu_pc )
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__field( bool, cache )
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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->cache = cache;
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),
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TP_printk("S/W flush at 0x%016lx (cache %s)",
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__entry->vcpu_pc, __entry->cache ? "on" : "off")
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);
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TRACE_EVENT(kvm_toggle_cache,
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TP_PROTO(unsigned long vcpu_pc, bool was, bool now),
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TP_ARGS(vcpu_pc, was, now),
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TP_STRUCT__entry(
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__field( unsigned long, vcpu_pc )
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__field( bool, was )
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__field( bool, now )
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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->was = was;
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__entry->now = now;
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),
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TP_printk("VM op at 0x%016lx (cache was %s, now %s)",
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__entry->vcpu_pc, __entry->was ? "on" : "off",
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__entry->now ? "on" : "off")
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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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