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charset="utf-8" From: Yi-De Wu Add tracepoints for hypervisor calls and VCPU exit reasons in GenieZone driver. It aids performance debugging by providing more information about hypervisor operations and VCPU behavior. Command Usage: echo geniezone:* >> /sys/kernel/tracing/set_event echo 1 > /sys/kernel/tracing/tracing_on echo 0 > /sys/kernel/tracing/tracing_on cat /sys/kernel/tracing/trace For example: crosvm_vcpu0-4874 [007] ..... 94.757349: mtk_hypcall_enter: id=3D0xfb= 001005 crosvm_vcpu0-4874 [007] ..... 94.760902: mtk_hypcall_leave: id=3D0xfb= 001005 invalid=3D0 crosvm_vcpu0-4874 [007] ..... 94.760902: mtk_vcpu_exit: vcpu exit_rea= son=3DIRQ(0x92920003) This example tracks a hypervisor function call by an ID (`0xbb001005`) from initiation to termination, which is supported (invalid=3D0). A vCPU exit is triggered by an Interrupt Request (IRQ) (exit reason: 0x92920003). /* VM exit reason */ enum { GZVM_EXIT_UNKNOWN =3D 0x92920000, GZVM_EXIT_MMIO =3D 0x92920001, GZVM_EXIT_HYPERCALL =3D 0x92920002, GZVM_EXIT_IRQ =3D 0x92920003, GZVM_EXIT_EXCEPTION =3D 0x92920004, GZVM_EXIT_DEBUG =3D 0x92920005, GZVM_EXIT_FAIL_ENTRY =3D 0x92920006, GZVM_EXIT_INTERNAL_ERROR =3D 0x92920007, GZVM_EXIT_SYSTEM_EVENT =3D 0x92920008, GZVM_EXIT_SHUTDOWN =3D 0x92920009, GZVM_EXIT_GZ =3D 0x9292000a, }; Signed-off-by: Liju-clr Chen Signed-off-by: Yi-De Wu --- arch/arm64/geniezone/vm.c | 4 ++ drivers/virt/geniezone/gzvm_vcpu.c | 3 ++ include/trace/events/geniezone.h | 84 ++++++++++++++++++++++++++++++ 3 files changed, 91 insertions(+) create mode 100644 include/trace/events/geniezone.h diff --git a/arch/arm64/geniezone/vm.c b/arch/arm64/geniezone/vm.c index 62ffb415354c..618de2ff9471 100644 --- a/arch/arm64/geniezone/vm.c +++ b/arch/arm64/geniezone/vm.c @@ -7,6 +7,8 @@ #include #include =20 +#define CREATE_TRACE_POINTS +#include #include #include #include "gzvm_arch_common.h" @@ -44,11 +46,13 @@ int gzvm_hypcall_wrapper(unsigned long a0, unsigned lon= g a1, .a6 =3D a6, .a7 =3D a7, }; + trace_mtk_hypcall_enter(a0); arm_smccc_1_2_hvc(&args, &res_1_2); res->a0 =3D res_1_2.a0; res->a1 =3D res_1_2.a1; res->a2 =3D res_1_2.a2; res->a3 =3D res_1_2.a3; + trace_mtk_hypcall_leave(a0, (res->a0 !=3D ERR_NOT_SUPPORTED) ? 0 : 1); =20 return gzvm_err_to_errno(res->a0); } diff --git a/drivers/virt/geniezone/gzvm_vcpu.c b/drivers/virt/geniezone/gz= vm_vcpu.c index 8741088de479..28bd690e4b7c 100644 --- a/drivers/virt/geniezone/gzvm_vcpu.c +++ b/drivers/virt/geniezone/gzvm_vcpu.c @@ -10,6 +10,8 @@ #include #include #include + +#include #include =20 /* maximum size needed for holding an integer */ @@ -103,6 +105,7 @@ static long gzvm_vcpu_run(struct gzvm_vcpu *vcpu, void = __user *argp) =20 while (!need_userspace && !signal_pending(current)) { gzvm_arch_vcpu_run(vcpu, &exit_reason); + trace_mtk_vcpu_exit(exit_reason); =20 switch (exit_reason) { case GZVM_EXIT_MMIO: diff --git a/include/trace/events/geniezone.h b/include/trace/events/geniez= one.h new file mode 100644 index 000000000000..4fffd826ba67 --- /dev/null +++ b/include/trace/events/geniezone.h @@ -0,0 +1,84 @@ +/* SPDX-License-Identifier: GPL-2.0 */ +/* + * Copyright (c) 2023 MediaTek Inc. + */ + +#undef TRACE_SYSTEM +#define TRACE_SYSTEM geniezone + +#define _TRACE_GENIEZONE_H + +#include +#include + +#define GZVM_EXIT_REASONS \ +EM(UNKNOWN)\ +EM(MMIO)\ +EM(HYPERCALL)\ +EM(IRQ)\ +EM(EXCEPTION)\ +EM(DEBUG)\ +EM(FAIL_ENTRY)\ +EM(INTERNAL_ERROR)\ +EM(SYSTEM_EVENT)\ +EM(SHUTDOWN)\ +EMe(GZ) + +#undef EM +#undef EMe +#define EM(a) TRACE_DEFINE_ENUM(GZVM_EXIT_##a); +#define EMe(a) TRACE_DEFINE_ENUM(GZVM_EXIT_##a); + +GZVM_EXIT_REASONS + +#undef EM +#undef EMe + +#define EM(a) { GZVM_EXIT_##a, #a }, +#define EMe(a) { GZVM_EXIT_##a, #a } + +TRACE_EVENT(mtk_hypcall_enter, + TP_PROTO(unsigned long id), + + TP_ARGS(id), + + TP_STRUCT__entry(__field(unsigned long, id)), + + TP_fast_assign(__entry->id =3D id;), + + TP_printk("id=3D0x%lx", __entry->id) +); + +TRACE_EVENT(mtk_hypcall_leave, + TP_PROTO(unsigned long id, unsigned long invalid), + + TP_ARGS(id, invalid), + + TP_STRUCT__entry(__field(unsigned long, id) + __field(unsigned long, invalid) + ), + + TP_fast_assign(__entry->id =3D id; + __entry->invalid =3D invalid; + ), + + TP_printk("id=3D0x%lx invalid=3D%lu", __entry->id, __entry->invalid) +); + +TRACE_EVENT(mtk_vcpu_exit, + TP_PROTO(unsigned long exit_reason), + + TP_ARGS(exit_reason), + + TP_STRUCT__entry(__field(unsigned long, exit_reason)), + + TP_fast_assign(__entry->exit_reason =3D exit_reason;), + + TP_printk("vcpu exit_reason=3D%s(0x%lx)", + __print_symbolic(__entry->exit_reason, GZVM_EXIT_REASONS), + __entry->exit_reason) + +); + +/* This part must be outside protection */ +#include --=20 2.18.0