| Message ID | 20231228105147.13752-20-yi-de.wu@mediatek.com (mailing list archive) |
|---|---|
| State | Handled Elsewhere |
| Headers | show |
| Series | GenieZone hypervisor drivers | expand |
On Thu, 28 Dec 2023 18:51:46 +0800 Yi-De Wu <yi-de.wu@mediatek.com> wrote: > 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_vcpu0-4838 [004] ..... 76053.536034: mtk_hypcall_enter: id=0xbb001005 > crosvm_vcpu0-4838 [004] ..... 76053.540039: mtk_hypcall_leave: id=0xbb001005 invalid=0 > crosvm_vcpu0-4838 [004] ..... 76053.540040: mtk_vcpu_exit: vcpu exit_reason=0x92920003 Cleaning out patchwork, I noticed this patch. You can make the above more informative by having it output: crosvm_vcpu0-4838 [004] ..... 76053.540040: mtk_vcpu_exit: vcpu exit_reason=IRQ > > This example tracks a hypervisor function call by an ID (`0xbb001005`) > from initiation to termination, which is supported (invalid=0). A vCPU > exit is triggered by an Interrupt Request (IRQ) (exit reason: 0x92920003). > > /* VM exit reason */ > enum { > GZVM_EXIT_UNKNOWN = 0x92920000, > GZVM_EXIT_MMIO = 0x92920001, > GZVM_EXIT_HYPERCALL = 0x92920002, > GZVM_EXIT_IRQ = 0x92920003, > GZVM_EXIT_EXCEPTION = 0x92920004, > GZVM_EXIT_DEBUG = 0x92920005, > GZVM_EXIT_FAIL_ENTRY = 0x92920006, > GZVM_EXIT_INTERNAL_ERROR = 0x92920007, > GZVM_EXIT_SYSTEM_EVENT = 0x92920008, > GZVM_EXIT_SHUTDOWN = 0x92920009, > GZVM_EXIT_GZ = 0x9292000a, > }; > > Signed-off-by: Liju-clr Chen <liju-clr.chen@mediatek.com> > Signed-off-by: Yi-De Wu <yi-de.wu@mediatek.com> > --- > arch/arm64/geniezone/vm.c | 5 +++ > drivers/virt/geniezone/gzvm_vcpu.c | 3 ++ > include/trace/events/geniezone.h | 54 ++++++++++++++++++++++++++++++ > 3 files changed, 62 insertions(+) > create mode 100644 include/trace/events/geniezone.h > > diff --git a/arch/arm64/geniezone/vm.c b/arch/arm64/geniezone/vm.c > index a9d264bbb3b1..5667643251b5 100644 > --- a/arch/arm64/geniezone/vm.c > +++ b/arch/arm64/geniezone/vm.c > @@ -7,6 +7,8 @@ > #include <linux/err.h> > #include <linux/uaccess.h> > > +#define CREATE_TRACE_POINTS > +#include <trace/events/geniezone.h> > #include <linux/gzvm.h> > #include <linux/gzvm_drv.h> > #include "gzvm_arch_common.h" > @@ -33,7 +35,10 @@ int gzvm_hypcall_wrapper(unsigned long a0, unsigned long a1, > unsigned long a6, unsigned long a7, > struct arm_smccc_res *res) > { > + trace_mtk_hypcall_enter(a0); > arm_smccc_hvc(a0, a1, a2, a3, a4, a5, a6, a7, res); > + trace_mtk_hypcall_leave(a0, (res->a0 != ERR_NOT_SUPPORTED) ? 0 : 1); > + > return gzvm_err_to_errno(res->a0); > } > > diff --git a/drivers/virt/geniezone/gzvm_vcpu.c b/drivers/virt/geniezone/gzvm_vcpu.c > index 86c690749277..138ec064596b 100644 > --- a/drivers/virt/geniezone/gzvm_vcpu.c > +++ b/drivers/virt/geniezone/gzvm_vcpu.c > @@ -10,6 +10,8 @@ > #include <linux/mm.h> > #include <linux/platform_device.h> > #include <linux/slab.h> > + > +#include <trace/events/geniezone.h> > #include <linux/gzvm_drv.h> > > /* maximum size needed for holding an integer */ > @@ -103,6 +105,7 @@ static long gzvm_vcpu_run(struct gzvm_vcpu *vcpu, void __user *argp) > > while (!need_userspace && !signal_pending(current)) { > gzvm_arch_vcpu_run(vcpu, &exit_reason); > + trace_mtk_vcpu_exit(exit_reason); > > switch (exit_reason) { > case GZVM_EXIT_MMIO: > diff --git a/include/trace/events/geniezone.h b/include/trace/events/geniezone.h > new file mode 100644 > index 000000000000..1fa44f9c4b3c > --- /dev/null > +++ b/include/trace/events/geniezone.h > @@ -0,0 +1,54 @@ > +/* SPDX-License-Identifier: GPL-2.0 */ > +/* > + * Copyright (c) 2023 MediaTek Inc. > + */ > + > +#undef TRACE_SYSTEM > +#define TRACE_SYSTEM geniezone > + > +#define _TRACE_GENIEZONE_H > + > +#include <linux/tracepoint.h> #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 = id;), > + > + TP_printk("id=0x%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 = id; > + __entry->invalid = invalid; > + ), > + > + TP_printk("id=0x%lx invalid=%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 = exit_reason;), > + > + TP_printk("vcpu exit_reason=0x%lx", __entry->exit_reason) TP_printk("vcpu exit_reason=0x%lx", __print_symbolic(__entry->exit_reason, GZVM_EXIT_REASONS)) And instead of having the cryptic enum values printed, you will have human readable reasons. -- Steve > +); > + > +/* This part must be outside protection */ > +#include <trace/define_trace.h>
diff --git a/arch/arm64/geniezone/vm.c b/arch/arm64/geniezone/vm.c index a9d264bbb3b1..5667643251b5 100644 --- a/arch/arm64/geniezone/vm.c +++ b/arch/arm64/geniezone/vm.c @@ -7,6 +7,8 @@ #include <linux/err.h> #include <linux/uaccess.h> +#define CREATE_TRACE_POINTS +#include <trace/events/geniezone.h> #include <linux/gzvm.h> #include <linux/gzvm_drv.h> #include "gzvm_arch_common.h" @@ -33,7 +35,10 @@ int gzvm_hypcall_wrapper(unsigned long a0, unsigned long a1, unsigned long a6, unsigned long a7, struct arm_smccc_res *res) { + trace_mtk_hypcall_enter(a0); arm_smccc_hvc(a0, a1, a2, a3, a4, a5, a6, a7, res); + trace_mtk_hypcall_leave(a0, (res->a0 != ERR_NOT_SUPPORTED) ? 0 : 1); + return gzvm_err_to_errno(res->a0); } diff --git a/drivers/virt/geniezone/gzvm_vcpu.c b/drivers/virt/geniezone/gzvm_vcpu.c index 86c690749277..138ec064596b 100644 --- a/drivers/virt/geniezone/gzvm_vcpu.c +++ b/drivers/virt/geniezone/gzvm_vcpu.c @@ -10,6 +10,8 @@ #include <linux/mm.h> #include <linux/platform_device.h> #include <linux/slab.h> + +#include <trace/events/geniezone.h> #include <linux/gzvm_drv.h> /* maximum size needed for holding an integer */ @@ -103,6 +105,7 @@ static long gzvm_vcpu_run(struct gzvm_vcpu *vcpu, void __user *argp) while (!need_userspace && !signal_pending(current)) { gzvm_arch_vcpu_run(vcpu, &exit_reason); + trace_mtk_vcpu_exit(exit_reason); switch (exit_reason) { case GZVM_EXIT_MMIO: diff --git a/include/trace/events/geniezone.h b/include/trace/events/geniezone.h new file mode 100644 index 000000000000..1fa44f9c4b3c --- /dev/null +++ b/include/trace/events/geniezone.h @@ -0,0 +1,54 @@ +/* SPDX-License-Identifier: GPL-2.0 */ +/* + * Copyright (c) 2023 MediaTek Inc. + */ + +#undef TRACE_SYSTEM +#define TRACE_SYSTEM geniezone + +#define _TRACE_GENIEZONE_H + +#include <linux/tracepoint.h> + +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 = id;), + + TP_printk("id=0x%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 = id; + __entry->invalid = invalid; + ), + + TP_printk("id=0x%lx invalid=%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 = exit_reason;), + + TP_printk("vcpu exit_reason=0x%lx", __entry->exit_reason) +); + +/* This part must be outside protection */ +#include <trace/define_trace.h>
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_vcpu0-4838 [004] ..... 76053.536034: mtk_hypcall_enter: id=0xbb001005 crosvm_vcpu0-4838 [004] ..... 76053.540039: mtk_hypcall_leave: id=0xbb001005 invalid=0 crosvm_vcpu0-4838 [004] ..... 76053.540040: mtk_vcpu_exit: vcpu exit_reason=0x92920003 This example tracks a hypervisor function call by an ID (`0xbb001005`) from initiation to termination, which is supported (invalid=0). A vCPU exit is triggered by an Interrupt Request (IRQ) (exit reason: 0x92920003). /* VM exit reason */ enum { GZVM_EXIT_UNKNOWN = 0x92920000, GZVM_EXIT_MMIO = 0x92920001, GZVM_EXIT_HYPERCALL = 0x92920002, GZVM_EXIT_IRQ = 0x92920003, GZVM_EXIT_EXCEPTION = 0x92920004, GZVM_EXIT_DEBUG = 0x92920005, GZVM_EXIT_FAIL_ENTRY = 0x92920006, GZVM_EXIT_INTERNAL_ERROR = 0x92920007, GZVM_EXIT_SYSTEM_EVENT = 0x92920008, GZVM_EXIT_SHUTDOWN = 0x92920009, GZVM_EXIT_GZ = 0x9292000a, }; Signed-off-by: Liju-clr Chen <liju-clr.chen@mediatek.com> Signed-off-by: Yi-De Wu <yi-de.wu@mediatek.com> --- arch/arm64/geniezone/vm.c | 5 +++ drivers/virt/geniezone/gzvm_vcpu.c | 3 ++ include/trace/events/geniezone.h | 54 ++++++++++++++++++++++++++++++ 3 files changed, 62 insertions(+) create mode 100644 include/trace/events/geniezone.h