From mboxrd@z Thu Jan 1 00:00:00 1970 From: Shenlin Liang Date: Fri, 7 Jun 2024 10:11:31 +0800 (GMT+08:00) Subject: [PATCH v3 2/2] perf kvm/riscv: Port perf kvm stat to RISC-V In-Reply-To: References: <20240422080833.8745-1-liangshenlin@eswincomputing.com> <20240422080833.8745-3-liangshenlin@eswincomputing.com> Message-ID: <5fa1e23d.1f4a.18ff07726a1.Coremail.liangshenlin@eswincomputing.com> List-Id: To: kvm-riscv@lists.infradead.org MIME-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit On 2024-06-07 08:27, Namhyung Kim wrote: > > Hello, > > On Mon, Apr 22, 2024 at 08:08:33AM +0000, Shenlin Liang wrote: > > 'perf kvm stat report/record' generates a statistical analysis of KVM > > events and can be used to analyze guest exit reasons. > > > > "report" reports statistical analysis of guest exit events. > > > > To record kvm events on the host: > > # perf kvm stat record -a > > > > To report kvm VM EXIT events: > > # perf kvm stat report --event=vmexit > > > > Signed-off-by: Shenlin Liang > > --- > > tools/perf/arch/riscv/Makefile | 1 + > > tools/perf/arch/riscv/util/Build | 1 + > > tools/perf/arch/riscv/util/kvm-stat.c | 79 +++++++++++++++++++ > > .../arch/riscv/util/riscv_exception_types.h | 35 ++++++++ > > 4 files changed, 116 insertions(+) > > create mode 100644 tools/perf/arch/riscv/util/kvm-stat.c > > create mode 100644 tools/perf/arch/riscv/util/riscv_exception_types.h > > > > diff --git a/tools/perf/arch/riscv/Makefile b/tools/perf/arch/riscv/Makefile > > index a8d25d005207..e1e445615536 100644 > > --- a/tools/perf/arch/riscv/Makefile > > +++ b/tools/perf/arch/riscv/Makefile > > @@ -3,3 +3,4 @@ PERF_HAVE_DWARF_REGS := 1 > > endif > > PERF_HAVE_ARCH_REGS_QUERY_REGISTER_OFFSET := 1 > > PERF_HAVE_JITDUMP := 1 > > +HAVE_KVM_STAT_SUPPORT := 1 > > \ No newline at end of file > > diff --git a/tools/perf/arch/riscv/util/Build b/tools/perf/arch/riscv/util/Build > > index 603dbb5ae4dc..d72b04f8d32b 100644 > > --- a/tools/perf/arch/riscv/util/Build > > +++ b/tools/perf/arch/riscv/util/Build > > @@ -1,5 +1,6 @@ > > perf-y += perf_regs.o > > perf-y += header.o > > > > +perf-$(CONFIG_LIBTRACEEVENT) += kvm-stat.o > > perf-$(CONFIG_DWARF) += dwarf-regs.o > > perf-$(CONFIG_LIBDW_DWARF_UNWIND) += unwind-libdw.o > > diff --git a/tools/perf/arch/riscv/util/kvm-stat.c b/tools/perf/arch/riscv/util/kvm-stat.c > > new file mode 100644 > > index 000000000000..58813049fc45 > > --- /dev/null > > +++ b/tools/perf/arch/riscv/util/kvm-stat.c > > @@ -0,0 +1,79 @@ > > +// SPDX-License-Identifier: GPL-2.0 > > +/* > > + * Arch specific functions for perf kvm stat. > > + * > > + * Copyright 2024 Beijing ESWIN Computing Technology Co., Ltd. > > + * > > + */ > > +#include > > +#include > > +#include "../../../util/evsel.h" > > +#include "../../../util/kvm-stat.h" > > +#include "riscv_exception_types.h" > > +#include "debug.h" > > + > > +define_exit_reasons_table(riscv_exit_reasons, kvm_riscv_exception_class); > > + > > +const char *vcpu_id_str = "id"; > > +const char *kvm_exit_reason = "scause"; > > +const char *kvm_entry_trace = "kvm:kvm_entry"; > > +const char *kvm_exit_trace = "kvm:kvm_exit"; > > + > > +const char *kvm_events_tp[] = { > > + "kvm:kvm_entry", > > + "kvm:kvm_exit", > > + NULL, > > +}; > > + > > +static void event_get_key(struct evsel *evsel, > > + struct perf_sample *sample, > > + struct event_key *key) > > +{ > > + key->info = 0; > > + key->key = evsel__intval(evsel, sample, kvm_exit_reason); > > + key->key = (int)key->key; > > Looks unnecessary.. > > Thanks, > Namhyung Yes?it's unnecessary... @Anup, Could you delete this line when merging, or should I send another revision ? Thanks, Shenlin > > > > + key->exit_reasons = riscv_exit_reasons; > > +} > > + > > +static bool event_begin(struct evsel *evsel, > > + struct perf_sample *sample __maybe_unused, > > + struct event_key *key __maybe_unused) > > +{ > > + return evsel__name_is(evsel, kvm_entry_trace); > > +} > > + > > +static bool event_end(struct evsel *evsel, > > + struct perf_sample *sample, > > + struct event_key *key) > > +{ > > + if (evsel__name_is(evsel, kvm_exit_trace)) { > > + event_get_key(evsel, sample, key); > > + return true; > > + } > > + return false; > > +} > > + > > +static struct kvm_events_ops exit_events = { > > + .is_begin_event = event_begin, > > + .is_end_event = event_end, > > + .decode_key = exit_event_decode_key, > > + .name = "VM-EXIT" > > +}; > > + > > +struct kvm_reg_events_ops kvm_reg_events_ops[] = { > > + { > > + .name = "vmexit", > > + .ops = &exit_events, > > + }, > > + { NULL, NULL }, > > +}; > > + > > +const char * const kvm_skip_events[] = { > > + NULL, > > +}; > > + > > +int cpu_isa_init(struct perf_kvm_stat *kvm, const char *cpuid __maybe_unused) > > +{ > > + kvm->exit_reasons_isa = "riscv64"; > > + return 0; > > +} > > diff --git a/tools/perf/arch/riscv/util/riscv_exception_types.h b/tools/perf/arch/riscv/util/riscv_exception_types.h > > new file mode 100644 > > index 000000000000..c49b8fa5e847 > > --- /dev/null > > +++ b/tools/perf/arch/riscv/util/riscv_exception_types.h > > @@ -0,0 +1,35 @@ > > +// SPDX-License-Identifier: GPL-2.0 > > +#ifndef ARCH_PERF_RISCV_EXCEPTION_TYPES_H > > +#define ARCH_PERF_RISCV_EXCEPTION_TYPES_H > > + > > +#define EXC_INST_MISALIGNED 0 > > +#define EXC_INST_ACCESS 1 > > +#define EXC_INST_ILLEGAL 2 > > +#define EXC_BREAKPOINT 3 > > +#define EXC_LOAD_MISALIGNED 4 > > +#define EXC_LOAD_ACCESS 5 > > +#define EXC_STORE_MISALIGNED 6 > > +#define EXC_STORE_ACCESS 7 > > +#define EXC_SYSCALL 8 > > +#define EXC_HYPERVISOR_SYSCALL 9 > > +#define EXC_SUPERVISOR_SYSCALL 10 > > +#define EXC_INST_PAGE_FAULT 12 > > +#define EXC_LOAD_PAGE_FAULT 13 > > +#define EXC_STORE_PAGE_FAULT 15 > > +#define EXC_INST_GUEST_PAGE_FAULT 20 > > +#define EXC_LOAD_GUEST_PAGE_FAULT 21 > > +#define EXC_VIRTUAL_INST_FAULT 22 > > +#define EXC_STORE_GUEST_PAGE_FAULT 23 > > + > > +#define EXC(x) {EXC_##x, #x } > > + > > +#define kvm_riscv_exception_class \ > > + EXC(INST_MISALIGNED), EXC(INST_ACCESS), EXC(INST_ILLEGAL), \ > > + EXC(BREAKPOINT), EXC(LOAD_MISALIGNED), EXC(LOAD_ACCESS), \ > > + EXC(STORE_MISALIGNED), EXC(STORE_ACCESS), EXC(SYSCALL), \ > > + EXC(HYPERVISOR_SYSCALL), EXC(SUPERVISOR_SYSCALL), \ > > + EXC(INST_PAGE_FAULT), EXC(LOAD_PAGE_FAULT), EXC(STORE_PAGE_FAULT), \ > > + EXC(INST_GUEST_PAGE_FAULT), EXC(LOAD_GUEST_PAGE_FAULT), \ > > + EXC(VIRTUAL_INST_FAULT), EXC(STORE_GUEST_PAGE_FAULT) > > + > > +#endif /* ARCH_PERF_RISCV_EXCEPTION_TYPES_H */ > > -- > > 2.37.2 > > From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from zg8tmtu5ljy1ljeznc42.icoremail.net (zg8tmtu5ljy1ljeznc42.icoremail.net [159.65.134.6]) by 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