KVM: s390: Add architectural trace events

Add trace events for several s390 architecture specifics:

- SIE entry/exit
- common intercepts
- common instructions (sigp/diagnose)

Reviewed-by: Christian Borntraeger <borntraeger@de.ibm.com>
Signed-off-by: Cornelia Huck <cornelia.huck@de.ibm.com>
Signed-off-by: Avi Kivity <avi@redhat.com>

1 files changed, 341 insertions, 0 deletions

diff --git a/arch/s390/kvm/trace.h b/arch/s390/kvm/trace.h
new file mode 100644
index 000000000000..2b29e62351d3
--- /dev/null
+++ b/arch/s390/kvm/trace.h
@@ -0,0 +1,341 @@
+#if !defined(_TRACE_KVM_H) || defined(TRACE_HEADER_MULTI_READ)
+#define _TRACE_KVM_H
+
+#include <linux/tracepoint.h>
+#include <asm/sigp.h>
+#include <asm/debug.h>
+
+#undef TRACE_SYSTEM
+#define TRACE_SYSTEM kvm
+#define TRACE_INCLUDE_PATH .
+#undef TRACE_INCLUDE_FILE
+#define TRACE_INCLUDE_FILE trace
+
+/*
+ * Helpers for vcpu-specific tracepoints containing the same information
+ * as s390dbf VCPU_EVENTs.
+ */
+#define VCPU_PROTO_COMMON struct kvm_vcpu *vcpu
+#define VCPU_ARGS_COMMON vcpu
+#define VCPU_FIELD_COMMON __field(int, id)			\
+	__field(unsigned long, pswmask)				\
+	__field(unsigned long, pswaddr)
+#define VCPU_ASSIGN_COMMON do {						\
+	__entry->id = vcpu->vcpu_id;					\
+	__entry->pswmask = vcpu->arch.sie_block->gpsw.mask;		\
+	__entry->pswaddr = vcpu->arch.sie_block->gpsw.addr;		\
+	} while (0);
+#define VCPU_TP_PRINTK(p_str, p_args...)				\
+	TP_printk("%02d[%016lx-%016lx]: " p_str, __entry->id,		\
+		  __entry->pswmask, __entry->pswaddr, p_args)
+
+/*
+ * Tracepoints for SIE entry and exit.
+ */
+TRACE_EVENT(kvm_s390_sie_enter,
+	    TP_PROTO(VCPU_PROTO_COMMON, int cpuflags),
+	    TP_ARGS(VCPU_ARGS_COMMON, cpuflags),
+
+	    TP_STRUCT__entry(
+		    VCPU_FIELD_COMMON
+		    __field(int, cpuflags)
+		    ),
+
+	    TP_fast_assign(
+		    VCPU_ASSIGN_COMMON
+		    __entry->cpuflags = cpuflags;
+		    ),
+
+	    VCPU_TP_PRINTK("entering sie flags %x", __entry->cpuflags)
+	);
+
+TRACE_EVENT(kvm_s390_sie_fault,
+	    TP_PROTO(VCPU_PROTO_COMMON),
+	    TP_ARGS(VCPU_ARGS_COMMON),
+
+	    TP_STRUCT__entry(
+		    VCPU_FIELD_COMMON
+		    ),
+
+	    TP_fast_assign(
+		    VCPU_ASSIGN_COMMON
+		    ),
+
+	    VCPU_TP_PRINTK("%s", "fault in sie instruction")
+	);
+
+#define sie_intercept_code				\
+	{0x04, "Instruction"},				\
+	{0x08, "Program interruption"},			\
+	{0x0C, "Instruction and program interuption"},	\
+	{0x10, "External request"},			\
+	{0x14, "External interruption"},		\
+	{0x18, "I/O request"},				\
+	{0x1C, "Wait state"},				\
+	{0x20, "Validity"},				\
+	{0x28, "Stop request"}
+
+TRACE_EVENT(kvm_s390_sie_exit,
+	    TP_PROTO(VCPU_PROTO_COMMON, u8 icptcode),
+	    TP_ARGS(VCPU_ARGS_COMMON, icptcode),
+
+	    TP_STRUCT__entry(
+		    VCPU_FIELD_COMMON
+		    __field(u8, icptcode)
+		    ),
+
+	    TP_fast_assign(
+		    VCPU_ASSIGN_COMMON
+		    __entry->icptcode = icptcode;
+		    ),
+
+	    VCPU_TP_PRINTK("exit sie icptcode %d (%s)", __entry->icptcode,
+			   __print_symbolic(__entry->icptcode,
+					    sie_intercept_code))
+	);
+
+/*
+ * Trace point for intercepted instructions.
+ */
+TRACE_EVENT(kvm_s390_intercept_instruction,
+	    TP_PROTO(VCPU_PROTO_COMMON, __u16 ipa, __u32 ipb),
+	    TP_ARGS(VCPU_ARGS_COMMON, ipa, ipb),
+
+	    TP_STRUCT__entry(
+		    VCPU_FIELD_COMMON
+		    __field(__u64, instruction)
+		    __field(char, insn[8])
+		    ),
+
+	    TP_fast_assign(
+		    VCPU_ASSIGN_COMMON
+		    __entry->instruction = ((__u64)ipa << 48) |
+		    ((__u64)ipb << 16);
+		    ),
+
+	    VCPU_TP_PRINTK("intercepted instruction %016llx (%s)",
+			   __entry->instruction,
+			   insn_to_mnemonic((unsigned char *)
+					    &__entry->instruction,
+					 __entry->insn) ?
+			   "unknown" : __entry->insn)
+	);
+
+/*
+ * Trace point for intercepted program interruptions.
+ */
+TRACE_EVENT(kvm_s390_intercept_prog,
+	    TP_PROTO(VCPU_PROTO_COMMON, __u16 code),
+	    TP_ARGS(VCPU_ARGS_COMMON, code),
+
+	    TP_STRUCT__entry(
+		    VCPU_FIELD_COMMON
+		    __field(__u16, code)
+		    ),
+
+	    TP_fast_assign(
+		    VCPU_ASSIGN_COMMON
+		    __entry->code = code;
+		    ),
+
+	    VCPU_TP_PRINTK("intercepted program interruption %04x",
+			   __entry->code)
+	);
+
+/*
+ * Trace point for validity intercepts.
+ */
+TRACE_EVENT(kvm_s390_intercept_validity,
+	    TP_PROTO(VCPU_PROTO_COMMON, __u16 viwhy),
+	    TP_ARGS(VCPU_ARGS_COMMON, viwhy),
+
+	    TP_STRUCT__entry(
+		    VCPU_FIELD_COMMON
+		    __field(__u16, viwhy)
+		    ),
+
+	    TP_fast_assign(
+		    VCPU_ASSIGN_COMMON
+		    __entry->viwhy = viwhy;
+		    ),
+
+	    VCPU_TP_PRINTK("got validity intercept %04x", __entry->viwhy)
+	);
+
+/*
+ * Trace points for instructions that are of special interest.
+ */
+
+#define sigp_order_codes					\
+	{SIGP_SENSE, "sense"},					\
+	{SIGP_EXTERNAL_CALL, "external call"},			\
+	{SIGP_EMERGENCY_SIGNAL, "emergency signal"},		\
+	{SIGP_STOP, "stop"},					\
+	{SIGP_STOP_AND_STORE_STATUS, "stop and store status"},	\
+	{SIGP_SET_ARCHITECTURE, "set architecture"},		\
+	{SIGP_SET_PREFIX, "set prefix"},			\
+	{SIGP_SENSE_RUNNING, "sense running"},			\
+	{SIGP_RESTART, "restart"}
+
+TRACE_EVENT(kvm_s390_handle_sigp,
+	    TP_PROTO(VCPU_PROTO_COMMON, __u8 order_code, __u16 cpu_addr, \
+		     __u32 parameter),
+	    TP_ARGS(VCPU_ARGS_COMMON, order_code, cpu_addr, parameter),
+
+	    TP_STRUCT__entry(
+		    VCPU_FIELD_COMMON
+		    __field(__u8, order_code)
+		    __field(__u16, cpu_addr)
+		    __field(__u32, parameter)
+		    ),
+
+	    TP_fast_assign(
+		    VCPU_ASSIGN_COMMON
+		    __entry->order_code = order_code;
+		    __entry->cpu_addr = cpu_addr;
+		    __entry->parameter = parameter;
+		    ),
+
+	    VCPU_TP_PRINTK("handle sigp order %02x (%s), cpu address %04x, " \
+			   "parameter %08x", __entry->order_code,
+			   __print_symbolic(__entry->order_code,
+					    sigp_order_codes),
+			   __entry->cpu_addr, __entry->parameter)
+	);
+
+#define diagnose_codes				\
+	{0x10, "release pages"},		\
+	{0x44, "time slice end"},		\
+	{0x308, "ipl functions"},		\
+	{0x500, "kvm hypercall"},		\
+	{0x501, "kvm breakpoint"}
+
+TRACE_EVENT(kvm_s390_handle_diag,
+	    TP_PROTO(VCPU_PROTO_COMMON, __u16 code),
+	    TP_ARGS(VCPU_ARGS_COMMON, code),
+
+	    TP_STRUCT__entry(
+		    VCPU_FIELD_COMMON
+		    __field(__u16, code)
+		    ),
+
+	    TP_fast_assign(
+		    VCPU_ASSIGN_COMMON
+		    __entry->code = code;
+		    ),
+
+	    VCPU_TP_PRINTK("handle diagnose call %04x (%s)", __entry->code,
+			   __print_symbolic(__entry->code, diagnose_codes))
+	);
+
+TRACE_EVENT(kvm_s390_handle_lctl,
+	    TP_PROTO(VCPU_PROTO_COMMON, int g, int reg1, int reg3, u64 addr),
+	    TP_ARGS(VCPU_ARGS_COMMON, g, reg1, reg3, addr),
+
+	    TP_STRUCT__entry(
+		    VCPU_FIELD_COMMON
+		    __field(int, g)
+		    __field(int, reg1)
+		    __field(int, reg3)
+		    __field(u64, addr)
+		    ),
+
+	    TP_fast_assign(
+		    VCPU_ASSIGN_COMMON
+		    __entry->g = g;
+		    __entry->reg1 = reg1;
+		    __entry->reg3 = reg3;
+		    __entry->addr = addr;
+		    ),
+
+	    VCPU_TP_PRINTK("%s: loading cr %x-%x from %016llx",
+			   __entry->g ? "lctlg" : "lctl",
+			   __entry->reg1, __entry->reg3, __entry->addr)
+	);
+
+TRACE_EVENT(kvm_s390_handle_prefix,
+	    TP_PROTO(VCPU_PROTO_COMMON, int set, u32 address),
+	    TP_ARGS(VCPU_ARGS_COMMON, set, address),
+
+	    TP_STRUCT__entry(
+		    VCPU_FIELD_COMMON
+		    __field(int, set)
+		    __field(u32, address)
+		    ),
+
+	    TP_fast_assign(
+		    VCPU_ASSIGN_COMMON
+		    __entry->set = set;
+		    __entry->address = address;
+		    ),
+
+	    VCPU_TP_PRINTK("%s prefix to %08x",
+			   __entry->set ? "setting" : "storing",
+			   __entry->address)
+	);
+
+TRACE_EVENT(kvm_s390_handle_stap,
+	    TP_PROTO(VCPU_PROTO_COMMON, u64 address),
+	    TP_ARGS(VCPU_ARGS_COMMON, address),
+
+	    TP_STRUCT__entry(
+		    VCPU_FIELD_COMMON
+		    __field(u64, address)
+		    ),
+
+	    TP_fast_assign(
+		    VCPU_ASSIGN_COMMON
+		    __entry->address = address;
+		    ),
+
+	    VCPU_TP_PRINTK("storing cpu address to %016llx",
+			   __entry->address)
+	);
+
+TRACE_EVENT(kvm_s390_handle_stfl,
+	    TP_PROTO(VCPU_PROTO_COMMON, unsigned int facility_list),
+	    TP_ARGS(VCPU_ARGS_COMMON, facility_list),
+
+	    TP_STRUCT__entry(
+		    VCPU_FIELD_COMMON
+		    __field(unsigned int, facility_list)
+		    ),
+
+	    TP_fast_assign(
+		    VCPU_ASSIGN_COMMON
+		    __entry->facility_list = facility_list;
+		    ),
+
+	    VCPU_TP_PRINTK("store facility list value %08x",
+			   __entry->facility_list)
+	);
+
+TRACE_EVENT(kvm_s390_handle_stsi,
+	    TP_PROTO(VCPU_PROTO_COMMON, int fc, int sel1, int sel2, u64 addr),
+	    TP_ARGS(VCPU_ARGS_COMMON, fc, sel1, sel2, addr),
+
+	    TP_STRUCT__entry(
+		    VCPU_FIELD_COMMON
+		    __field(int, fc)
+		    __field(int, sel1)
+		    __field(int, sel2)
+		    __field(u64, addr)
+		    ),
+
+	    TP_fast_assign(
+		    VCPU_ASSIGN_COMMON
+		    __entry->fc = fc;
+		    __entry->sel1 = sel1;
+		    __entry->sel2 = sel2;
+		    __entry->addr = addr;
+		    ),
+
+	    VCPU_TP_PRINTK("STSI %d.%d.%d information stored to %016llx",
+			   __entry->fc, __entry->sel1, __entry->sel2,
+			   __entry->addr)
+	);
+
+#endif /* _TRACE_KVM_H */
+
+/* This part must be outside protection */
+#include <trace/define_trace.h>