mirror of
https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
synced 2024-10-13 12:06:49 +00:00
3c038e6be0
This patch enables async page faults for s390 kvm guests. It provides the userspace API to enable and disable_wait this feature. The disable_wait will enforce that the feature is off by waiting on it. Also it includes the diagnose code, called by the guest to enable async page faults. The async page faults will use an already existing guest interface for this purpose, as described in "CP Programming Services (SC24-6084)". Signed-off-by: Dominik Dingel <dingel@linux.vnet.ibm.com> Signed-off-by: Christian Borntraeger <borntraeger@de.ibm.com>
389 lines
9.4 KiB
C
389 lines
9.4 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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#include <asm/sigp.h>
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#include <asm/debug.h>
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#include <asm/dis.h>
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#undef TRACE_SYSTEM
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#define TRACE_SYSTEM kvm
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#define TRACE_INCLUDE_PATH .
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#undef TRACE_INCLUDE_FILE
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#define TRACE_INCLUDE_FILE trace
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/*
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* Helpers for vcpu-specific tracepoints containing the same information
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* as s390dbf VCPU_EVENTs.
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*/
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#define VCPU_PROTO_COMMON struct kvm_vcpu *vcpu
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#define VCPU_ARGS_COMMON vcpu
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#define VCPU_FIELD_COMMON __field(int, id) \
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__field(unsigned long, pswmask) \
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__field(unsigned long, pswaddr)
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#define VCPU_ASSIGN_COMMON do { \
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__entry->id = vcpu->vcpu_id; \
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__entry->pswmask = vcpu->arch.sie_block->gpsw.mask; \
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__entry->pswaddr = vcpu->arch.sie_block->gpsw.addr; \
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} while (0);
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#define VCPU_TP_PRINTK(p_str, p_args...) \
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TP_printk("%02d[%016lx-%016lx]: " p_str, __entry->id, \
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__entry->pswmask, __entry->pswaddr, p_args)
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TRACE_EVENT(kvm_s390_major_guest_pfault,
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TP_PROTO(VCPU_PROTO_COMMON),
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TP_ARGS(VCPU_ARGS_COMMON),
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TP_STRUCT__entry(
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VCPU_FIELD_COMMON
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),
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TP_fast_assign(
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VCPU_ASSIGN_COMMON
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),
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VCPU_TP_PRINTK("%s", "major fault, maybe applicable for pfault")
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);
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TRACE_EVENT(kvm_s390_pfault_init,
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TP_PROTO(VCPU_PROTO_COMMON, long pfault_token),
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TP_ARGS(VCPU_ARGS_COMMON, pfault_token),
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TP_STRUCT__entry(
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VCPU_FIELD_COMMON
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__field(long, pfault_token)
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),
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TP_fast_assign(
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VCPU_ASSIGN_COMMON
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__entry->pfault_token = pfault_token;
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),
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VCPU_TP_PRINTK("init pfault token %ld", __entry->pfault_token)
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);
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TRACE_EVENT(kvm_s390_pfault_done,
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TP_PROTO(VCPU_PROTO_COMMON, long pfault_token),
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TP_ARGS(VCPU_ARGS_COMMON, pfault_token),
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TP_STRUCT__entry(
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VCPU_FIELD_COMMON
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__field(long, pfault_token)
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),
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TP_fast_assign(
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VCPU_ASSIGN_COMMON
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__entry->pfault_token = pfault_token;
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),
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VCPU_TP_PRINTK("done pfault token %ld", __entry->pfault_token)
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);
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/*
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* Tracepoints for SIE entry and exit.
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*/
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TRACE_EVENT(kvm_s390_sie_enter,
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TP_PROTO(VCPU_PROTO_COMMON, int cpuflags),
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TP_ARGS(VCPU_ARGS_COMMON, cpuflags),
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TP_STRUCT__entry(
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VCPU_FIELD_COMMON
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__field(int, cpuflags)
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),
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TP_fast_assign(
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VCPU_ASSIGN_COMMON
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__entry->cpuflags = cpuflags;
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),
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VCPU_TP_PRINTK("entering sie flags %x", __entry->cpuflags)
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);
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TRACE_EVENT(kvm_s390_sie_fault,
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TP_PROTO(VCPU_PROTO_COMMON),
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TP_ARGS(VCPU_ARGS_COMMON),
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TP_STRUCT__entry(
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VCPU_FIELD_COMMON
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),
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TP_fast_assign(
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VCPU_ASSIGN_COMMON
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),
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VCPU_TP_PRINTK("%s", "fault in sie instruction")
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);
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#define sie_intercept_code \
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{0x04, "Instruction"}, \
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{0x08, "Program interruption"}, \
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{0x0C, "Instruction and program interruption"}, \
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{0x10, "External request"}, \
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{0x14, "External interruption"}, \
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{0x18, "I/O request"}, \
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{0x1C, "Wait state"}, \
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{0x20, "Validity"}, \
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{0x28, "Stop request"}
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TRACE_EVENT(kvm_s390_sie_exit,
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TP_PROTO(VCPU_PROTO_COMMON, u8 icptcode),
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TP_ARGS(VCPU_ARGS_COMMON, icptcode),
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TP_STRUCT__entry(
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VCPU_FIELD_COMMON
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__field(u8, icptcode)
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),
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TP_fast_assign(
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VCPU_ASSIGN_COMMON
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__entry->icptcode = icptcode;
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),
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VCPU_TP_PRINTK("exit sie icptcode %d (%s)", __entry->icptcode,
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__print_symbolic(__entry->icptcode,
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sie_intercept_code))
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);
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/*
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* Trace point for intercepted instructions.
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*/
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TRACE_EVENT(kvm_s390_intercept_instruction,
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TP_PROTO(VCPU_PROTO_COMMON, __u16 ipa, __u32 ipb),
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TP_ARGS(VCPU_ARGS_COMMON, ipa, ipb),
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TP_STRUCT__entry(
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VCPU_FIELD_COMMON
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__field(__u64, instruction)
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__field(char, insn[8])
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),
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TP_fast_assign(
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VCPU_ASSIGN_COMMON
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__entry->instruction = ((__u64)ipa << 48) |
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((__u64)ipb << 16);
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),
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VCPU_TP_PRINTK("intercepted instruction %016llx (%s)",
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__entry->instruction,
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insn_to_mnemonic((unsigned char *)
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&__entry->instruction,
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__entry->insn, sizeof(__entry->insn)) ?
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"unknown" : __entry->insn)
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);
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/*
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* Trace point for intercepted program interruptions.
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*/
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TRACE_EVENT(kvm_s390_intercept_prog,
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TP_PROTO(VCPU_PROTO_COMMON, __u16 code),
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TP_ARGS(VCPU_ARGS_COMMON, code),
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TP_STRUCT__entry(
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VCPU_FIELD_COMMON
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__field(__u16, code)
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),
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TP_fast_assign(
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VCPU_ASSIGN_COMMON
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__entry->code = code;
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),
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VCPU_TP_PRINTK("intercepted program interruption %04x",
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__entry->code)
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);
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/*
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* Trace point for validity intercepts.
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*/
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TRACE_EVENT(kvm_s390_intercept_validity,
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TP_PROTO(VCPU_PROTO_COMMON, __u16 viwhy),
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TP_ARGS(VCPU_ARGS_COMMON, viwhy),
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TP_STRUCT__entry(
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VCPU_FIELD_COMMON
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__field(__u16, viwhy)
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),
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TP_fast_assign(
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VCPU_ASSIGN_COMMON
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__entry->viwhy = viwhy;
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),
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VCPU_TP_PRINTK("got validity intercept %04x", __entry->viwhy)
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);
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/*
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* Trace points for instructions that are of special interest.
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*/
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#define sigp_order_codes \
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{SIGP_SENSE, "sense"}, \
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{SIGP_EXTERNAL_CALL, "external call"}, \
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{SIGP_EMERGENCY_SIGNAL, "emergency signal"}, \
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{SIGP_STOP, "stop"}, \
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{SIGP_STOP_AND_STORE_STATUS, "stop and store status"}, \
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{SIGP_SET_ARCHITECTURE, "set architecture"}, \
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{SIGP_SET_PREFIX, "set prefix"}, \
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{SIGP_STORE_STATUS_AT_ADDRESS, "store status at addr"}, \
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{SIGP_SENSE_RUNNING, "sense running"}, \
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{SIGP_RESTART, "restart"}
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TRACE_EVENT(kvm_s390_handle_sigp,
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TP_PROTO(VCPU_PROTO_COMMON, __u8 order_code, __u16 cpu_addr, \
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__u32 parameter),
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TP_ARGS(VCPU_ARGS_COMMON, order_code, cpu_addr, parameter),
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TP_STRUCT__entry(
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VCPU_FIELD_COMMON
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__field(__u8, order_code)
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__field(__u16, cpu_addr)
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__field(__u32, parameter)
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),
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TP_fast_assign(
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VCPU_ASSIGN_COMMON
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__entry->order_code = order_code;
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__entry->cpu_addr = cpu_addr;
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__entry->parameter = parameter;
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),
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VCPU_TP_PRINTK("handle sigp order %02x (%s), cpu address %04x, " \
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"parameter %08x", __entry->order_code,
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__print_symbolic(__entry->order_code,
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sigp_order_codes),
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__entry->cpu_addr, __entry->parameter)
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);
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#define diagnose_codes \
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{0x10, "release pages"}, \
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{0x44, "time slice end"}, \
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{0x308, "ipl functions"}, \
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{0x500, "kvm hypercall"}, \
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{0x501, "kvm breakpoint"}
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TRACE_EVENT(kvm_s390_handle_diag,
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TP_PROTO(VCPU_PROTO_COMMON, __u16 code),
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TP_ARGS(VCPU_ARGS_COMMON, code),
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TP_STRUCT__entry(
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VCPU_FIELD_COMMON
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__field(__u16, code)
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),
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TP_fast_assign(
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VCPU_ASSIGN_COMMON
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__entry->code = code;
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),
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VCPU_TP_PRINTK("handle diagnose call %04x (%s)", __entry->code,
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__print_symbolic(__entry->code, diagnose_codes))
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);
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TRACE_EVENT(kvm_s390_handle_lctl,
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TP_PROTO(VCPU_PROTO_COMMON, int g, int reg1, int reg3, u64 addr),
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TP_ARGS(VCPU_ARGS_COMMON, g, reg1, reg3, addr),
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TP_STRUCT__entry(
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VCPU_FIELD_COMMON
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__field(int, g)
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__field(int, reg1)
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__field(int, reg3)
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__field(u64, addr)
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),
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TP_fast_assign(
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VCPU_ASSIGN_COMMON
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__entry->g = g;
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__entry->reg1 = reg1;
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__entry->reg3 = reg3;
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__entry->addr = addr;
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),
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VCPU_TP_PRINTK("%s: loading cr %x-%x from %016llx",
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__entry->g ? "lctlg" : "lctl",
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__entry->reg1, __entry->reg3, __entry->addr)
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);
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TRACE_EVENT(kvm_s390_handle_prefix,
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TP_PROTO(VCPU_PROTO_COMMON, int set, u32 address),
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TP_ARGS(VCPU_ARGS_COMMON, set, address),
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TP_STRUCT__entry(
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VCPU_FIELD_COMMON
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__field(int, set)
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__field(u32, address)
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),
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TP_fast_assign(
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VCPU_ASSIGN_COMMON
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__entry->set = set;
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__entry->address = address;
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),
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VCPU_TP_PRINTK("%s prefix to %08x",
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__entry->set ? "setting" : "storing",
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__entry->address)
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);
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TRACE_EVENT(kvm_s390_handle_stap,
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TP_PROTO(VCPU_PROTO_COMMON, u64 address),
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TP_ARGS(VCPU_ARGS_COMMON, address),
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TP_STRUCT__entry(
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VCPU_FIELD_COMMON
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__field(u64, address)
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),
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TP_fast_assign(
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VCPU_ASSIGN_COMMON
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__entry->address = address;
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),
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VCPU_TP_PRINTK("storing cpu address to %016llx",
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__entry->address)
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);
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TRACE_EVENT(kvm_s390_handle_stfl,
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TP_PROTO(VCPU_PROTO_COMMON, unsigned int facility_list),
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TP_ARGS(VCPU_ARGS_COMMON, facility_list),
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TP_STRUCT__entry(
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VCPU_FIELD_COMMON
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__field(unsigned int, facility_list)
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),
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TP_fast_assign(
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VCPU_ASSIGN_COMMON
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__entry->facility_list = facility_list;
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),
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VCPU_TP_PRINTK("store facility list value %08x",
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__entry->facility_list)
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);
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TRACE_EVENT(kvm_s390_handle_stsi,
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TP_PROTO(VCPU_PROTO_COMMON, int fc, int sel1, int sel2, u64 addr),
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TP_ARGS(VCPU_ARGS_COMMON, fc, sel1, sel2, addr),
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TP_STRUCT__entry(
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VCPU_FIELD_COMMON
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__field(int, fc)
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__field(int, sel1)
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__field(int, sel2)
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__field(u64, addr)
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),
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TP_fast_assign(
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VCPU_ASSIGN_COMMON
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__entry->fc = fc;
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__entry->sel1 = sel1;
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__entry->sel2 = sel2;
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__entry->addr = addr;
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),
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VCPU_TP_PRINTK("STSI %d.%d.%d information stored to %016llx",
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__entry->fc, __entry->sel1, __entry->sel2,
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__entry->addr)
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);
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#endif /* _TRACE_KVM_H */
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/* This part must be outside protection */
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#include <trace/define_trace.h>
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