Provides a file descriptor per VM to read VM stats info/data. Provides a file descriptor per vCPU to read vCPU stats info/data.

Signed-off-by: Jing Zhang jingzhangos@google.com --- arch/arm64/kvm/guest.c | 30 +++++ arch/mips/kvm/mips.c | 55 ++++++++++ arch/powerpc/kvm/book3s.c | 56 ++++++++++ arch/powerpc/kvm/booke.c | 49 +++++++++ arch/s390/kvm/kvm-s390.c | 121 +++++++++++++++++++++ arch/x86/kvm/x86.c | 57 ++++++++++ include/linux/kvm_host.h | 127 +++++++++++++++++++++- include/uapi/linux/kvm.h | 50 +++++++++ virt/kvm/kvm_main.c | 223 ++++++++++++++++++++++++++++++++++++++ 9 files changed, 766 insertions(+), 2 deletions(-)

diff --git a/arch/arm64/kvm/guest.c b/arch/arm64/kvm/guest.c index 0e41331b0911..cf04c2a3a1ce 100644 --- a/arch/arm64/kvm/guest.c +++ b/arch/arm64/kvm/guest.c @@ -28,6 +28,36 @@

#include "trace.h"

+struct _kvm_stats_desc kvm_vm_stats_desc[] = { + STATS_VM_COMMON, +}; + +struct _kvm_stats_header kvm_vm_stats_header = { + .name_size = KVM_STATS_NAME_LEN, + .count = ARRAY_SIZE(kvm_vm_stats_desc), + .desc_offset = sizeof(struct kvm_stats_header), + .data_offset = sizeof(struct kvm_stats_header) + + sizeof(kvm_vm_stats_desc), +}; + +struct _kvm_stats_desc kvm_vcpu_stats_desc[] = { + STATS_VCPU_COMMON, + STATS_DESC_COUNTER("hvc_exit_stat"), + STATS_DESC_COUNTER("wfe_exit_stat"), + STATS_DESC_COUNTER("wfi_exit_stat"), + STATS_DESC_COUNTER("mmio_exit_user"), + STATS_DESC_COUNTER("mmio_exit_kernel"), + STATS_DESC_COUNTER("exits"), +}; + +struct _kvm_stats_header kvm_vcpu_stats_header = { + .name_size = KVM_STATS_NAME_LEN, + .count = ARRAY_SIZE(kvm_vcpu_stats_desc), + .desc_offset = sizeof(struct kvm_stats_header), + .data_offset = sizeof(struct kvm_stats_header) + + sizeof(kvm_vcpu_stats_desc), +}; + struct kvm_stats_debugfs_item debugfs_entries[] = { VCPU_STAT_COM("halt_successful_poll", halt_successful_poll), VCPU_STAT_COM("halt_attempted_poll", halt_attempted_poll), diff --git a/arch/mips/kvm/mips.c b/arch/mips/kvm/mips.c index 011c59acd606..ced50e8c1bb2 100644 --- a/arch/mips/kvm/mips.c +++ b/arch/mips/kvm/mips.c @@ -39,6 +39,61 @@ #define VECTORSPACING 0x100 /* for EI/VI mode */ #endif

+struct _kvm_stats_desc kvm_vm_stats_desc[] = { + STATS_VM_COMMON, +}; + +struct _kvm_stats_header kvm_vm_stats_header = { + .name_size = KVM_STATS_NAME_LEN, + .count = ARRAY_SIZE(kvm_vm_stats_desc), + .desc_offset = sizeof(struct kvm_stats_header), + .data_offset = sizeof(struct kvm_stats_header) + + sizeof(kvm_vm_stats_desc), +}; + +struct _kvm_stats_desc kvm_vcpu_stats_desc[] = { + STATS_VCPU_COMMON, + STATS_DESC_COUNTER("wait_exits"), + STATS_DESC_COUNTER("cache_exits"), + STATS_DESC_COUNTER("signal_exits"), + STATS_DESC_COUNTER("int_exits"), + STATS_DESC_COUNTER("cop_unusable_exits"), + STATS_DESC_COUNTER("tlbmod_exits"), + STATS_DESC_COUNTER("tlbmiss_ld_exits"), + STATS_DESC_COUNTER("tlbmiss_st_exits"), + STATS_DESC_COUNTER("addrerr_st_exits"), + STATS_DESC_COUNTER("addrerr_ld_exits"), + STATS_DESC_COUNTER("syscall_exits"), + STATS_DESC_COUNTER("resvd_inst_exits"), + STATS_DESC_COUNTER("break_inst_exits"), + STATS_DESC_COUNTER("trap_inst_exits"), + STATS_DESC_COUNTER("msa_fpe_exits"), + STATS_DESC_COUNTER("fpe_exits"), + STATS_DESC_COUNTER("msa_disabled_exits"), + STATS_DESC_COUNTER("flush_dcache_exits"), +#ifdef CONFIG_KVM_MIPS_VZ + STATS_DESC_COUNTER("vz_gpsi_exits"), + STATS_DESC_COUNTER("vz_gsfc_exits"), + STATS_DESC_COUNTER("vz_hc_exits"), + STATS_DESC_COUNTER("vz_grr_exits"), + STATS_DESC_COUNTER("vz_gva_exits"), + STATS_DESC_COUNTER("vz_ghfc_exits"), + STATS_DESC_COUNTER("vz_gpa_exits"), + STATS_DESC_COUNTER("vz_resvd_exits"), +#ifdef CONFIG_CPU_LOONGSON64 + STATS_DESC_COUNTER("vz_cpucfg_exits"), +#endif +#endif +}; + +struct _kvm_stats_header kvm_vcpu_stats_header = { + .name_size = KVM_STATS_NAME_LEN, + .count = ARRAY_SIZE(kvm_vcpu_stats_desc), + .desc_offset = sizeof(struct kvm_stats_header), + .data_offset = sizeof(struct kvm_stats_header) + + sizeof(kvm_vcpu_stats_desc), +}; + struct kvm_stats_debugfs_item debugfs_entries[] = { VCPU_STAT("wait", wait_exits), VCPU_STAT("cache", cache_exits), diff --git a/arch/powerpc/kvm/book3s.c b/arch/powerpc/kvm/book3s.c index bd3a10e1fdaf..9dc2510537ce 100644 --- a/arch/powerpc/kvm/book3s.c +++ b/arch/powerpc/kvm/book3s.c @@ -38,6 +38,62 @@

/* #define EXIT_DEBUG */

+struct _kvm_stats_desc kvm_vm_stats_desc[] = { + STATS_VM_COMMON, + STATS_DESC_ICOUNTER("num_2M_pages"), + STATS_DESC_ICOUNTER("num_1G_pages"), +}; + +struct _kvm_stats_header kvm_vm_stats_header = { + .name_size = KVM_STATS_NAME_LEN, + .count = ARRAY_SIZE(kvm_vm_stats_desc), + .desc_offset = sizeof(struct kvm_stats_header), + .data_offset = sizeof(struct kvm_stats_header) + + sizeof(kvm_vm_stats_desc), +}; + +struct _kvm_stats_desc kvm_vcpu_stats_desc[] = { + STATS_VCPU_COMMON, + STATS_DESC_COUNTER("sum_exits"), + STATS_DESC_COUNTER("mmio_exits"), + STATS_DESC_COUNTER("signal_exits"), + STATS_DESC_COUNTER("light_exits"), + STATS_DESC_COUNTER("itlb_real_miss_exits"), + STATS_DESC_COUNTER("itlb_virt_miss_exits"), + STATS_DESC_COUNTER("dtlb_real_miss_exits"), + STATS_DESC_COUNTER("dtlb_virt_miss_exits"), + STATS_DESC_COUNTER("syscall_exits"), + STATS_DESC_COUNTER("isi_exits"), + STATS_DESC_COUNTER("dsi_exits"), + STATS_DESC_COUNTER("emulated_inst_exits"), + STATS_DESC_COUNTER("dec_exits"), + STATS_DESC_COUNTER("ext_intr_exits"), + STATS_DESC_TIME_NSEC("halt_wait_ns"), + STATS_DESC_COUNTER("halt_successful_wait"), + STATS_DESC_COUNTER("dbell_exits"), + STATS_DESC_COUNTER("gdbell_exits"), + STATS_DESC_COUNTER("ld"), + STATS_DESC_COUNTER("st"), + STATS_DESC_COUNTER("pf_storage"), + STATS_DESC_COUNTER("pf_instruc"), + STATS_DESC_COUNTER("sp_storage"), + STATS_DESC_COUNTER("sp_instruc"), + STATS_DESC_COUNTER("queue_intr"), + STATS_DESC_COUNTER("ld_slow"), + STATS_DESC_COUNTER("st_slow"), + STATS_DESC_COUNTER("pthru_all"), + STATS_DESC_COUNTER("pthru_host"), + STATS_DESC_COUNTER("pthru_bad_aff"), +}; + +struct _kvm_stats_header kvm_vcpu_stats_header = { + .name_size = KVM_STATS_NAME_LEN, + .count = ARRAY_SIZE(kvm_vcpu_stats_desc), + .desc_offset = sizeof(struct kvm_stats_header), + .data_offset = sizeof(struct kvm_stats_header) + + sizeof(kvm_vcpu_stats_desc), +}; + struct kvm_stats_debugfs_item debugfs_entries[] = { VCPU_STAT("exits", sum_exits), VCPU_STAT("mmio", mmio_exits), diff --git a/arch/powerpc/kvm/booke.c b/arch/powerpc/kvm/booke.c index 07fdd7a1254a..e9ffcf0f022d 100644 --- a/arch/powerpc/kvm/booke.c +++ b/arch/powerpc/kvm/booke.c @@ -36,6 +36,55 @@

unsigned long kvmppc_booke_handlers;

+struct _kvm_stats_desc kvm_vm_stats_desc[] = { + STATS_VM_COMMON, + STATS_DESC_ICOUNTER("num_2M_pages",), + STATS_DESC_ICOUNTER("num_1G_pages",), +}; + +struct _kvm_stats_header kvm_vm_stats_header = { + .name_size = KVM_STATS_NAME_LEN, + .count = ARRAY_SIZE(kvm_vm_stats_desc), + .desc_offset = sizeof(struct kvm_stats_header), + .data_offset = sizeof(struct kvm_stats_header) + + sizeof(kvm_vm_stats_desc), +}; + +struct _kvm_stats_desc kvm_vcpu_stats_desc[] = { + STATS_VCPU_COMMON, + STATS_DESC_COUNTER("sum_exits"), + STATS_DESC_COUNTER("mmio_exits"), + STATS_DESC_COUNTER("signal_exits"), + STATS_DESC_COUNTER("light_exits"), + STATS_DESC_COUNTER("itlb_real_miss_exits"), + STATS_DESC_COUNTER("itlb_virt_miss_exits"), + STATS_DESC_COUNTER("dtlb_real_miss_exits"), + STATS_DESC_COUNTER("dtlb_virt_miss_exits"), + STATS_DESC_COUNTER("syscall_exits"), + STATS_DESC_COUNTER("isi_exits"), + STATS_DESC_COUNTER("dsi_exits"), + STATS_DESC_COUNTER("emulated_inst_exits"), + STATS_DESC_COUNTER("dec_exits"), + STATS_DESC_COUNTER("ext_intr_exits"), + STATS_DESC_TIME_NSEC("halt_wait_ns"), + STATS_DESC_COUNTER("halt_successful_wait"), + STATS_DESC_COUNTER("dbell_exits"), + STATS_DESC_COUNTER("gdbell_exits"), + STATS_DESC_COUNTER("ld"), + STATS_DESC_COUNTER("st"), + STATS_DESC_COUNTER("pthru_all"), + STATS_DESC_COUNTER("pthru_host"), + STATS_DESC_COUNTER("pthru_bad_aff"), +}; + +struct _kvm_stats_header kvm_vcpu_stats_header = { + .name_size = KVM_STATS_NAME_LEN, + .count = ARRAY_SIZE(kvm_vcpu_stats_desc), + .desc_offset = sizeof(struct kvm_stats_header), + .data_offset = sizeof(struct kvm_stats_header) + + sizeof(kvm_vcpu_stats_desc), +}; + struct kvm_stats_debugfs_item debugfs_entries[] = { VCPU_STAT("mmio", mmio_exits), VCPU_STAT("sig", signal_exits), diff --git a/arch/s390/kvm/kvm-s390.c b/arch/s390/kvm/kvm-s390.c index d6bf3372bb10..2c91d70754a9 100644 --- a/arch/s390/kvm/kvm-s390.c +++ b/arch/s390/kvm/kvm-s390.c @@ -58,6 +58,127 @@ #define VCPU_IRQS_MAX_BUF (sizeof(struct kvm_s390_irq) * \ (KVM_MAX_VCPUS + LOCAL_IRQS))

+struct _kvm_stats_desc kvm_vm_stats_desc[] = { + STATS_VM_COMMON, + STATS_DESC_COUNTER("inject_io"), + STATS_DESC_COUNTER("inject_float_mchk"), + STATS_DESC_COUNTER("inject_pfault_done"), + STATS_DESC_COUNTER("inject_service_signal"), + STATS_DESC_COUNTER("inject_virtio"), +}; + +struct _kvm_stats_header kvm_vm_stats_header = { + .name_size = KVM_STATS_NAME_LEN, + .count = ARRAY_SIZE(kvm_vm_stats_desc), + .desc_offset = sizeof(struct kvm_stats_header), + .data_offset = sizeof(struct kvm_stats_header) + + sizeof(kvm_vm_stats_desc), +}; + +struct _kvm_stats_desc kvm_vcpu_stats_desc[] = { + STATS_VCPU_COMMON, + STATS_DESC_COUNTER("exit_userspace"), + STATS_DESC_COUNTER("exit_null"), + STATS_DESC_COUNTER("exit_external_request"), + STATS_DESC_COUNTER("exit_io_request"), + STATS_DESC_COUNTER("exit_external_interrupt"), + STATS_DESC_COUNTER("exit_stop_request"), + STATS_DESC_COUNTER("exit_validity"), + STATS_DESC_COUNTER("exit_instruction"), + STATS_DESC_COUNTER("exit_pei"), + STATS_DESC_COUNTER("halt_no_poll_steal"), + STATS_DESC_COUNTER("instruction_lctl"), + STATS_DESC_COUNTER("instruction_lctlg"), + STATS_DESC_COUNTER("instruction_stctl"), + STATS_DESC_COUNTER("instruction_stctg"), + STATS_DESC_COUNTER("exit_program_interruption"), + STATS_DESC_COUNTER("exit_instr_and_program"), + STATS_DESC_COUNTER("exit_operation_exception"), + STATS_DESC_COUNTER("deliver_ckc"), + STATS_DESC_COUNTER("deliver_cputm"), + STATS_DESC_COUNTER("deliver_external_call"), + STATS_DESC_COUNTER("deliver_emergency_signal"), + STATS_DESC_COUNTER("deliver_service_signal"), + STATS_DESC_COUNTER("deliver_virtio"), + STATS_DESC_COUNTER("deliver_stop_signal"), + STATS_DESC_COUNTER("deliver_prefix_signal"), + STATS_DESC_COUNTER("deliver_restart_signal"), + STATS_DESC_COUNTER("deliver_program"), + STATS_DESC_COUNTER("deliver_io"), + STATS_DESC_COUNTER("deliver_machine_check"), + STATS_DESC_COUNTER("exit_wait_state"), + STATS_DESC_COUNTER("inject_ckc"), + STATS_DESC_COUNTER("inject_cputm"), + STATS_DESC_COUNTER("inject_external_call"), + STATS_DESC_COUNTER("inject_emergency_signal"), + STATS_DESC_COUNTER("inject_mchk"), + STATS_DESC_COUNTER("inject_pfault_init"), + STATS_DESC_COUNTER("inject_program"), + STATS_DESC_COUNTER("inject_restart"), + STATS_DESC_COUNTER("inject_set_prefix"), + STATS_DESC_COUNTER("inject_stop_signal"), + STATS_DESC_COUNTER("instruction_epsw"), + STATS_DESC_COUNTER("instruction_gs"), + STATS_DESC_COUNTER("instruction_io_other"), + STATS_DESC_COUNTER("instruction_lpsw"), + STATS_DESC_COUNTER("instruction_lpswe"), + STATS_DESC_COUNTER("instruction_pfmf"), + STATS_DESC_COUNTER("instruction_ptff"), + STATS_DESC_COUNTER("instruction_sck"), + STATS_DESC_COUNTER("instruction_sckpf"), + STATS_DESC_COUNTER("instruction_stidp"), + STATS_DESC_COUNTER("instruction_spx"), + STATS_DESC_COUNTER("instruction_stpx"), + STATS_DESC_COUNTER("instruction_stap"), + STATS_DESC_COUNTER("instruction_iske"), + STATS_DESC_COUNTER("instruction_ri"), + STATS_DESC_COUNTER("instruction_rrbe"), + STATS_DESC_COUNTER("instruction_sske"), + STATS_DESC_COUNTER("instruction_ipte_interlock"), + STATS_DESC_COUNTER("instruction_stsi"), + STATS_DESC_COUNTER("instruction_stfl"), + STATS_DESC_COUNTER("instruction_tb"), + STATS_DESC_COUNTER("instruction_tpi"), + STATS_DESC_COUNTER("instruction_tprot"), + STATS_DESC_COUNTER("instruction_tsch"), + STATS_DESC_COUNTER("instruction_sie"), + STATS_DESC_COUNTER("instruction_essa"), + STATS_DESC_COUNTER("instruction_sthyi"), + STATS_DESC_COUNTER("instruction_sigp_sense"), + STATS_DESC_COUNTER("instruction_sigp_sense_running"), + STATS_DESC_COUNTER("instruction_sigp_external_call"), + STATS_DESC_COUNTER("instruction_sigp_emergency"), + STATS_DESC_COUNTER("instruction_sigp_cond_emergency"), + STATS_DESC_COUNTER("instruction_sigp_start"), + STATS_DESC_COUNTER("instruction_sigp_stop"), + STATS_DESC_COUNTER("instruction_sigp_stop_store_status"), + STATS_DESC_COUNTER("instruction_sigp_store_status"), + STATS_DESC_COUNTER("instruction_sigp_store_adtl_status"), + STATS_DESC_COUNTER("instruction_sigp_arch"), + STATS_DESC_COUNTER("instruction_sigp_prefix"), + STATS_DESC_COUNTER("instruction_sigp_restart"), + STATS_DESC_COUNTER("instruction_sigp_init_cpu_reset"), + STATS_DESC_COUNTER("instruction_sigp_cpu_reset"), + STATS_DESC_COUNTER("instruction_sigp_unknown"), + STATS_DESC_COUNTER("diagnose_10"), + STATS_DESC_COUNTER("diagnose_44"), + STATS_DESC_COUNTER("diagnose_9c"), + STATS_DESC_COUNTER("diagnose_9c_ignored"), + STATS_DESC_COUNTER("diagnose_258"), + STATS_DESC_COUNTER("diagnose_308"), + STATS_DESC_COUNTER("diagnose_500"), + STATS_DESC_COUNTER("diagnose_other"), + STATS_DESC_COUNTER("pfault_sync"), +}; + +struct _kvm_stats_header kvm_vcpu_stats_header = { + .name_size = KVM_STATS_NAME_LEN, + .count = ARRAY_SIZE(kvm_vcpu_stats_desc), + .desc_offset = sizeof(struct kvm_stats_header), + .data_offset = sizeof(struct kvm_stats_header) + + sizeof(kvm_vcpu_stats_desc), +}; + struct kvm_stats_debugfs_item debugfs_entries[] = { VCPU_STAT("userspace_handled", exit_userspace), VCPU_STAT("exit_null", exit_null), diff --git a/arch/x86/kvm/x86.c b/arch/x86/kvm/x86.c index e1207fd8b40d..dc55de1f958f 100644 --- a/arch/x86/kvm/x86.c +++ b/arch/x86/kvm/x86.c @@ -217,6 +217,63 @@ EXPORT_SYMBOL_GPL(host_xss); u64 __read_mostly supported_xss; EXPORT_SYMBOL_GPL(supported_xss);

+struct _kvm_stats_desc kvm_vm_stats_desc[] = { + STATS_VM_COMMON, + STATS_DESC_COUNTER("mmu_shadow_zapped"), + STATS_DESC_COUNTER("mmu_pte_write"), + STATS_DESC_COUNTER("mmu_pde_zapped"), + STATS_DESC_COUNTER("mmu_flooded"), + STATS_DESC_COUNTER("mmu_recycled"), + STATS_DESC_COUNTER("mmu_cache_miss"), + STATS_DESC_ICOUNTER("mmu_unsync"), + STATS_DESC_ICOUNTER("largepages"), + STATS_DESC_ICOUNTER("nx_largepages_splits"), + STATS_DESC_ICOUNTER("max_mmu_page_hash_collisions"), +}; + +struct _kvm_stats_header kvm_vm_stats_header = { + .name_size = KVM_STATS_NAME_LEN, + .count = ARRAY_SIZE(kvm_vm_stats_desc), + .desc_offset = sizeof(struct kvm_stats_header), + .data_offset = sizeof(struct kvm_stats_header) + + sizeof(kvm_vm_stats_desc), +}; + +struct _kvm_stats_desc kvm_vcpu_stats_desc[] = { + STATS_VCPU_COMMON, + STATS_DESC_COUNTER("pf_fixed"), + STATS_DESC_COUNTER("pf_guest"), + STATS_DESC_COUNTER("tlb_flush"), + STATS_DESC_COUNTER("invlpg"), + STATS_DESC_COUNTER("exits"), + STATS_DESC_COUNTER("io_exits"), + STATS_DESC_COUNTER("mmio_exits"), + STATS_DESC_COUNTER("signal_exits"), + STATS_DESC_COUNTER("irq_window_exits"), + STATS_DESC_COUNTER("nmi_window_exits"), + STATS_DESC_COUNTER("l1d_flush"), + STATS_DESC_COUNTER("halt_exits"), + STATS_DESC_COUNTER("request_irq_exits"), + STATS_DESC_COUNTER("irq_exits"), + STATS_DESC_COUNTER("host_state_reload"), + STATS_DESC_COUNTER("fpu_reload"), + STATS_DESC_COUNTER("insn_emulation"), + STATS_DESC_COUNTER("insn_emulation_fail"), + STATS_DESC_COUNTER("hypercalls"), + STATS_DESC_COUNTER("irq_injections"), + STATS_DESC_COUNTER("nmi_injections"), + STATS_DESC_COUNTER("req_event"), + STATS_DESC_COUNTER("nested_run"), +}; + +struct _kvm_stats_header kvm_vcpu_stats_header = { + .name_size = KVM_STATS_NAME_LEN, + .count = ARRAY_SIZE(kvm_vcpu_stats_desc), + .desc_offset = sizeof(struct kvm_stats_header), + .data_offset = sizeof(struct kvm_stats_header) + + sizeof(kvm_vcpu_stats_desc), +}; + struct kvm_stats_debugfs_item debugfs_entries[] = { VCPU_STAT("pf_fixed", pf_fixed), VCPU_STAT("pf_guest", pf_guest), diff --git a/include/linux/kvm_host.h b/include/linux/kvm_host.h index 9286516094e3..796d97c8bbf0 100644 --- a/include/linux/kvm_host.h +++ b/include/linux/kvm_host.h @@ -1201,12 +1201,25 @@ struct kvm_stats_debugfs_item { int mode; };

+struct _kvm_stats_header { + __u32 name_size; + __u32 count; + __u32 desc_offset; + __u32 data_offset; +}; + +#define KVM_STATS_NAME_LEN 32 +struct _kvm_stats_desc { + struct kvm_stats_desc desc; + char name[KVM_STATS_NAME_LEN]; +}; + #define KVM_DBGFS_GET_MODE(dbgfs_item) \ ((dbgfs_item)->mode ? (dbgfs_item)->mode : 0644)

-#define VM_STAT(n, x, ...) \ +#define VM_STAT(n, x, ...) \ { n, offsetof(struct kvm, stat.x), KVM_STAT_VM, ## __VA_ARGS__ } -#define VCPU_STAT(n, x, ...) \ +#define VCPU_STAT(n, x, ...) \ { n, offsetof(struct kvm_vcpu, stat.x), KVM_STAT_VCPU, ## __VA_ARGS__ } #define VM_STAT_COM(n, x, ...) \ { n, offsetof(struct kvm, stat.common.x), KVM_STAT_VM, ## __VA_ARGS__ } @@ -1214,8 +1227,118 @@ struct kvm_stats_debugfs_item { { n, offsetof(struct kvm_vcpu, stat.common.x), \ KVM_STAT_VCPU, ## __VA_ARGS__ }

+#define STATS_DESC(name, type, unit, scale, exponent) \ + { \ + {type | unit | scale, exponent, 1}, name, \ + } +#define STATS_DESC_CUMULATIVE(name, unit, scale, exponent) \ + STATS_DESC(name, KVM_STATS_TYPE_CUMULATIVE, unit, scale, exponent) +#define STATS_DESC_INSTANT(name, unit, scale, exponent) \ + STATS_DESC(name, KVM_STATS_TYPE_INSTANT, unit, scale, exponent) + +/* Cumulative counter */ +#define STATS_DESC_COUNTER(name) \ + STATS_DESC_CUMULATIVE(name, KVM_STATS_UNIT_NONE, \ + KVM_STATS_SCALE_POW10, 0) +/* Instantaneous counter */ +#define STATS_DESC_ICOUNTER(name) \ + STATS_DESC_INSTANT(name, KVM_STATS_UNIT_NONE, \ + KVM_STATS_SCALE_POW10, 0) + +/* Cumulative clock cycles */ +#define STATS_DESC_CYCLE(name) \ + STATS_DESC_CUMULATIVE(name, KVM_STATS_UNIT_CYCLES, \ + KVM_STATS_SCALE_POW10, 0) +/* Instantaneous clock cycles */ +#define STATS_DESC_ICYCLE(name) \ + STATS_DESC_INSTANT(name, KVM_STATS_UNIT_CYCLES, \ + KVM_STATS_SCALE_POW10, 0) + +/* Cumulative memory size in Byte */ +#define STATS_DESC_SIZE_BYTE(name) \ + STATS_DESC_CUMULATIVE(name, KVM_STATS_UNIT_BYTES, \ + KVM_STATS_SCALE_POW2, 0) +/* Cumulative memory size in KiByte */ +#define STATS_DESC_SIZE_KBYTE(name) \ + STATS_DESC_CUMULATIVE(name, KVM_STATS_UNIT_BYTES, \ + KVM_STATS_SCALE_POW2, 10) +/* Cumulative memory size in MiByte */ +#define STATS_DESC_SIZE_MBYTE(name) \ + STATS_DESC_CUMULATIVE(name, KVM_STATS_UNIT_BYTES, \ + KVM_STATS_SCALE_POW2, 20) +/* Cumulative memory size in GiByte */ +#define STATS_DESC_SIZE_GBYTE(name) \ + STATS_DESC_CUMULATIVE(name, KVM_STATS_UNIT_BYTES, \ + KVM_STATS_SCALE_POW2, 30) + +/* Instantaneous memory size in Byte */ +#define STATS_DESC_ISIZE_BYTE(name) \ + STATS_DESC_INSTANT(name, KVM_STATS_UNIT_BYTES, \ + KVM_STATS_SCALE_POW2, 0) +/* Instantaneous memory size in KiByte */ +#define STATS_DESC_ISIZE_KBYTE(name) \ + STATS_DESC_INSTANT(name, KVM_STATS_UNIT_BYTES, \ + KVM_STATS_SCALE_POW2, 10) +/* Instantaneous memory size in MiByte */ +#define STATS_DESC_ISIZE_MBYTE(name) \ + STATS_DESC_INSTANT(name, KVM_STATS_UNIT_BYTES, \ + KVM_STATS_SCALE_POW2, 20) +/* Instantaneous memory size in GiByte */ +#define STATS_DESC_ISIZE_GBYTE(name) \ + STATS_DESC_INSTANT(name, KVM_STATS_UNIT_BYTES, \ + KVM_STATS_SCALE_POW2, 30) + +/* Cumulative time in second */ +#define STATS_DESC_TIME_SEC(name) \ + STATS_DESC_CUMULATIVE(name, KVM_STATS_UNIT_SECONDS, \ + KVM_STATS_SCALE_POW10, 0) +/* Cumulative time in millisecond */ +#define STATS_DESC_TIME_MSEC(name) \ + STATS_DESC_CUMULATIVE(name, KVM_STATS_UNIT_SECONDS, \ + KVM_STATS_SCALE_POW10, -3) +/* Cumulative time in microsecond */ +#define STATS_DESC_TIME_USEC(name) \ + STATS_DESC_CUMULATIVE(name, KVM_STATS_UNIT_SECONDS, \ + KVM_STATS_SCALE_POW10, -6) +/* Cumulative time in nanosecond */ +#define STATS_DESC_TIME_NSEC(name) \ + STATS_DESC_CUMULATIVE(name, KVM_STATS_UNIT_SECONDS, \ + KVM_STATS_SCALE_POW10, -9) + +/* Instantaneous time in second */ +#define STATS_DESC_ITIME_SEC(name) \ + STATS_DESC_INSTANT(name, KVM_STATS_UNIT_SECONDS, \ + KVM_STATS_SCALE_POW10, 0) +/* Instantaneous time in millisecond */ +#define STATS_DESC_ITIME_MSEC(name) \ + STATS_DESC_INSTANT(name, KVM_STATS_UNIT_SECONDS, \ + KVM_STATS_SCALE_POW10, -3) +/* Instantaneous time in microsecond */ +#define STATS_DESC_ITIME_USEC(name) \ + STATS_DESC_INSTANT(name, KVM_STATS_UNIT_SECONDS, \ + KVM_STATS_SCALE_POW10, -6) +/* Instantaneous time in nanosecond */ +#define STATS_DESC_ITIME_NSEC(name) \ + STATS_DESC_INSTANT(name, KVM_STATS_UNIT_SECONDS, \ + KVM_STATS_SCALE_POW10, -9) + +#define STATS_VM_COMMON \ + STATS_DESC_COUNTER("remote_tlb_flush") + +#define STATS_VCPU_COMMON \ + STATS_DESC_COUNTER("halt_successful_poll"), \ + STATS_DESC_COUNTER("halt_attempted_poll"), \ + STATS_DESC_COUNTER("halt_poll_invalid"), \ + STATS_DESC_COUNTER("halt_wakeup"), \ + STATS_DESC_TIME_NSEC("halt_poll_success_ns"), \ + STATS_DESC_TIME_NSEC("halt_poll_fail_ns") + extern struct kvm_stats_debugfs_item debugfs_entries[]; extern struct dentry *kvm_debugfs_dir; +extern struct _kvm_stats_header kvm_vm_stats_header; +extern struct _kvm_stats_header kvm_vcpu_stats_header; +extern struct _kvm_stats_desc kvm_vm_stats_desc[]; +extern struct _kvm_stats_desc kvm_vcpu_stats_desc[];

#if defined(CONFIG_MMU_NOTIFIER) && defined(KVM_ARCH_WANT_MMU_NOTIFIER) static inline int mmu_notifier_retry(struct kvm *kvm, unsigned long mmu_seq) diff --git a/include/uapi/linux/kvm.h b/include/uapi/linux/kvm.h index 1fb4fd863324..e7b8dc8fe7a4 100644 --- a/include/uapi/linux/kvm.h +++ b/include/uapi/linux/kvm.h @@ -1083,6 +1083,7 @@ struct kvm_ppc_resize_hpt { #define KVM_CAP_VM_COPY_ENC_CONTEXT_FROM 197 #define KVM_CAP_PTP_KVM 198 #define KVM_CAP_EXIT_HYPERCALL 199 +#define KVM_CAP_STATS_BINARY_FD 200

#ifdef KVM_CAP_IRQ_ROUTING

@@ -1899,4 +1900,53 @@ struct kvm_dirty_gfn { #define KVM_BUS_LOCK_DETECTION_OFF (1 << 0) #define KVM_BUS_LOCK_DETECTION_EXIT (1 << 1)

+#define KVM_STATS_ID_MAXLEN 64 + +struct kvm_stats_header { + char id[KVM_STATS_ID_MAXLEN]; + __u32 name_size; + __u32 count; + __u32 desc_offset; + __u32 data_offset; +}; + +#define KVM_STATS_TYPE_SHIFT 0 +#define KVM_STATS_TYPE_MASK (0xF << KVM_STATS_TYPE_SHIFT) +#define KVM_STATS_TYPE_CUMULATIVE (0x0 << KVM_STATS_TYPE_SHIFT) +#define KVM_STATS_TYPE_INSTANT (0x1 << KVM_STATS_TYPE_SHIFT) +#define KVM_STATS_TYPE_MAX KVM_STATS_TYPE_INSTANT + +#define KVM_STATS_UNIT_SHIFT 4 +#define KVM_STATS_UNIT_MASK (0xF << KVM_STATS_UNIT_SHIFT) +#define KVM_STATS_UNIT_NONE (0x0 << KVM_STATS_UNIT_SHIFT) +#define KVM_STATS_UNIT_BYTES (0x1 << KVM_STATS_UNIT_SHIFT) +#define KVM_STATS_UNIT_SECONDS (0x2 << KVM_STATS_UNIT_SHIFT) +#define KVM_STATS_UNIT_CYCLES (0x3 << KVM_STATS_UNIT_SHIFT) +#define KVM_STATS_UNIT_MAX KVM_STATS_UNIT_CYCLES + +#define KVM_STATS_SCALE_SHIFT 8 +#define KVM_STATS_SCALE_MASK (0xF << KVM_STATS_SCALE_SHIFT) +#define KVM_STATS_SCALE_POW10 (0x0 << KVM_STATS_SCALE_SHIFT) +#define KVM_STATS_SCALE_POW2 (0x1 << KVM_STATS_SCALE_SHIFT) +#define KVM_STATS_SCALE_MAX KVM_STATS_SCALE_POW2 + +struct kvm_stats_desc { + __u32 flags; + __s16 exponent; + __u16 size; + __u32 unused1; + __u32 unused2; + char name[0]; +}; + +struct kvm_vm_stats_data { + unsigned long value[0]; +}; + +struct kvm_vcpu_stats_data { + __u64 value[0]; +}; + +#define KVM_STATS_GETFD _IOR(KVMIO, 0xcc, struct kvm_stats_header) + #endif /* __LINUX_KVM_H */ diff --git a/virt/kvm/kvm_main.c b/virt/kvm/kvm_main.c index cdf53fb75ca1..c48089ab366c 100644 --- a/virt/kvm/kvm_main.c +++ b/virt/kvm/kvm_main.c @@ -3458,6 +3458,115 @@ static int kvm_vcpu_ioctl_set_sigmask(struct kvm_vcpu *vcpu, sigset_t *sigset) return 0; }

+static ssize_t kvm_vcpu_stats_read(struct file *file, char __user *user_buffer, + size_t size, loff_t *offset) +{ + char id[KVM_STATS_ID_MAXLEN]; + struct kvm_vcpu *vcpu = file->private_data; + ssize_t copylen, len, remain = size; + size_t size_header, size_desc, size_stats; + loff_t pos = *offset; + char __user *dest = user_buffer; + void *src; + + snprintf(id, sizeof(id), "kvm-%d/vcpu-%d", + task_pid_nr(current), vcpu->vcpu_id); + size_header = sizeof(kvm_vcpu_stats_header); + size_desc = + kvm_vcpu_stats_header.count * sizeof(struct _kvm_stats_desc); + size_stats = sizeof(vcpu->stat); + + len = sizeof(id) + size_header + size_desc + size_stats - pos; + len = min(len, remain); + if (len <= 0) + return 0; + remain = len; + + /* Copy kvm vcpu stats header id string */ + copylen = sizeof(id) - pos; + copylen = min(copylen, remain); + if (copylen > 0) { + src = (void *)id + pos; + if (copy_to_user(dest, src, copylen)) + return -EFAULT; + remain -= copylen; + pos += copylen; + dest += copylen; + } + /* Copy kvm vcpu stats header */ + copylen = sizeof(id) + size_header - pos; + copylen = min(copylen, remain); + if (copylen > 0) { + src = (void *)&kvm_vcpu_stats_header; + src += pos - sizeof(id); + if (copy_to_user(dest, src, copylen)) + return -EFAULT; + remain -= copylen; + pos += copylen; + dest += copylen; + } + /* Copy kvm vcpu stats descriptors */ + copylen = kvm_vcpu_stats_header.desc_offset + size_desc - pos; + copylen = min(copylen, remain); + if (copylen > 0) { + src = (void *)&kvm_vcpu_stats_desc; + src += pos - kvm_vcpu_stats_header.desc_offset; + if (copy_to_user(dest, src, copylen)) + return -EFAULT; + remain -= copylen; + pos += copylen; + dest += copylen; + } + /* Copy kvm vcpu stats values */ + copylen = kvm_vcpu_stats_header.data_offset + size_stats - pos; + copylen = min(copylen, remain); + if (copylen > 0) { + src = (void *)&vcpu->stat; + src += pos - kvm_vcpu_stats_header.data_offset; + if (copy_to_user(dest, src, copylen)) + return -EFAULT; + remain -= copylen; + pos += copylen; + dest += copylen; + } + + *offset = pos; + return len; +} + +static struct file_operations kvm_vcpu_stats_fops = { + .read = kvm_vcpu_stats_read, + .llseek = noop_llseek, +}; + +static int kvm_vcpu_ioctl_get_statsfd(struct kvm_vcpu *vcpu) +{ + int error, fd; + struct file *file; + char name[15 + ITOA_MAX_LEN + 1]; + + snprintf(name, sizeof(name), "kvm-vcpu-stats:%d", vcpu->vcpu_id); + + error = get_unused_fd_flags(O_CLOEXEC); + if (error < 0) + return error; + fd = error; + + file = anon_inode_getfile(name, &kvm_vcpu_stats_fops, vcpu, O_RDONLY); + if (IS_ERR(file)) { + error = PTR_ERR(file); + goto err_put_unused_fd; + } + file->f_mode |= FMODE_PREAD; + fd_install(fd, file); + + return fd; + +err_put_unused_fd: + put_unused_fd(fd); + return error; +} + static long kvm_vcpu_ioctl(struct file *filp, unsigned int ioctl, unsigned long arg) { @@ -3655,6 +3764,10 @@ static long kvm_vcpu_ioctl(struct file *filp, r = kvm_arch_vcpu_ioctl_set_fpu(vcpu, fpu); break; } + case KVM_STATS_GETFD: { + r = kvm_vcpu_ioctl_get_statsfd(vcpu); + break; + } default: r = kvm_arch_vcpu_ioctl(filp, ioctl, arg); } @@ -3913,6 +4026,8 @@ static long kvm_vm_ioctl_check_extension_generic(struct kvm *kvm, long arg) #else return 0; #endif + case KVM_CAP_STATS_BINARY_FD: + return 1; default: break; } @@ -4016,6 +4131,111 @@ static int kvm_vm_ioctl_enable_cap_generic(struct kvm *kvm, } }

+static ssize_t kvm_vm_stats_read(struct file *file, char __user *user_buffer, + size_t size, loff_t *offset) +{ + char id[KVM_STATS_ID_MAXLEN]; + struct kvm *kvm = file->private_data; + ssize_t copylen, len, remain = size; + size_t size_header, size_desc, size_stats; + loff_t pos = *offset; + char __user *dest = user_buffer; + void *src; + + snprintf(id, sizeof(id), "kvm-%d", task_pid_nr(current)); + size_header = sizeof(kvm_vm_stats_header); + size_desc = kvm_vm_stats_header.count * sizeof(struct _kvm_stats_desc); + size_stats = sizeof(kvm->stat); + + len = sizeof(id) + size_header + size_desc + size_stats - pos; + len = min(len, remain); + if (len <= 0) + return 0; + remain = len; + + /* Copy kvm vm stats header id string */ + copylen = sizeof(id) - pos; + copylen = min(copylen, remain); + if (copylen > 0) { + src = (void *)id + pos; + if (copy_to_user(dest, src, copylen)) + return -EFAULT; + remain -= copylen; + pos += copylen; + dest += copylen; + } + /* Copy kvm vm stats header */ + copylen = sizeof(id) + size_header - pos; + copylen = min(copylen, remain); + if (copylen > 0) { + src = (void *)&kvm_vm_stats_header; + src += pos - sizeof(id); + if (copy_to_user(dest, src, copylen)) + return -EFAULT; + remain -= copylen; + pos += copylen; + dest += copylen; + } + /* Copy kvm vm stats descriptors */ + copylen = kvm_vm_stats_header.desc_offset + size_desc - pos; + copylen = min(copylen, remain); + if (copylen > 0) { + src = (void *)&kvm_vm_stats_desc; + src += pos - kvm_vm_stats_header.desc_offset; + if (copy_to_user(dest, src, copylen)) + return -EFAULT; + remain -= copylen; + pos += copylen; + dest += copylen; + } + /* Copy kvm vm stats values */ + copylen = kvm_vm_stats_header.data_offset + size_stats - pos; + copylen = min(copylen, remain); + if (copylen > 0) { + src = (void *)&kvm->stat; + src += pos - kvm_vm_stats_header.data_offset; + if (copy_to_user(dest, src, copylen)) + return -EFAULT; + remain -= copylen; + pos += copylen; + dest += copylen; + } + + *offset = pos; + return len; +} + +static struct file_operations kvm_vm_stats_fops = { + .read = kvm_vm_stats_read, + .llseek = noop_llseek, +}; + +static int kvm_vm_ioctl_get_statsfd(struct kvm *kvm) +{ + int error, fd; + struct file *file; + + error = get_unused_fd_flags(O_CLOEXEC); + if (error < 0) + return error; + fd = error; + + file = anon_inode_getfile("kvm-vm-stats", + &kvm_vm_stats_fops, kvm, O_RDONLY); + if (IS_ERR(file)) { + error = PTR_ERR(file); + goto err_put_unused_fd; + } + file->f_mode |= FMODE_PREAD; + fd_install(fd, file); + + return fd; + +err_put_unused_fd: + put_unused_fd(fd); + return error; +} + static long kvm_vm_ioctl(struct file *filp, unsigned int ioctl, unsigned long arg) { @@ -4198,6 +4418,9 @@ static long kvm_vm_ioctl(struct file *filp, case KVM_RESET_DIRTY_RINGS: r = kvm_vm_ioctl_reset_dirty_pages(kvm); break; + case KVM_STATS_GETFD: + r = kvm_vm_ioctl_get_statsfd(kvm); + break; default: r = kvm_arch_vm_ioctl(filp, ioctl, arg); }

Signed-off-by: Jing Zhang jingzhangos@google.com --- tools/testing/selftests/kvm/.gitignore | 1 + tools/testing/selftests/kvm/Makefile | 3 + .../testing/selftests/kvm/include/kvm_util.h | 3 + .../selftests/kvm/kvm_bin_form_stats.c | 380 ++++++++++++++++++ tools/testing/selftests/kvm/lib/kvm_util.c | 11 + 5 files changed, 398 insertions(+) create mode 100644 tools/testing/selftests/kvm/kvm_bin_form_stats.c

diff --git a/tools/testing/selftests/kvm/.gitignore b/tools/testing/selftests/kvm/.gitignore index bd83158e0e0b..35796667c944 100644 --- a/tools/testing/selftests/kvm/.gitignore +++ b/tools/testing/selftests/kvm/.gitignore @@ -43,3 +43,4 @@ /memslot_modification_stress_test /set_memory_region_test /steal_time +/kvm_bin_form_stats diff --git a/tools/testing/selftests/kvm/Makefile b/tools/testing/selftests/kvm/Makefile index ea5c42841307..e06ced4f99a2 100644 --- a/tools/testing/selftests/kvm/Makefile +++ b/tools/testing/selftests/kvm/Makefile @@ -76,6 +76,7 @@ TEST_GEN_PROGS_x86_64 += kvm_page_table_test TEST_GEN_PROGS_x86_64 += memslot_modification_stress_test TEST_GEN_PROGS_x86_64 += set_memory_region_test TEST_GEN_PROGS_x86_64 += steal_time +TEST_GEN_PROGS_x86_64 += kvm_bin_form_stats

TEST_GEN_PROGS_aarch64 += aarch64/get-reg-list TEST_GEN_PROGS_aarch64 += aarch64/get-reg-list-sve @@ -87,6 +88,7 @@ TEST_GEN_PROGS_aarch64 += kvm_create_max_vcpus TEST_GEN_PROGS_aarch64 += kvm_page_table_test TEST_GEN_PROGS_aarch64 += set_memory_region_test TEST_GEN_PROGS_aarch64 += steal_time +TEST_GEN_PROGS_aarch64 += kvm_bin_form_stats

TEST_GEN_PROGS_s390x = s390x/memop TEST_GEN_PROGS_s390x += s390x/resets @@ -96,6 +98,7 @@ TEST_GEN_PROGS_s390x += dirty_log_test TEST_GEN_PROGS_s390x += kvm_create_max_vcpus TEST_GEN_PROGS_s390x += kvm_page_table_test TEST_GEN_PROGS_s390x += set_memory_region_test +TEST_GEN_PROGS_s390x += kvm_bin_form_stats

TEST_GEN_PROGS += $(TEST_GEN_PROGS_$(UNAME_M)) LIBKVM += $(LIBKVM_$(UNAME_M)) diff --git a/tools/testing/selftests/kvm/include/kvm_util.h b/tools/testing/selftests/kvm/include/kvm_util.h index a8f022794ce3..ee01a67022d9 100644 --- a/tools/testing/selftests/kvm/include/kvm_util.h +++ b/tools/testing/selftests/kvm/include/kvm_util.h @@ -387,4 +387,7 @@ uint64_t get_ucall(struct kvm_vm *vm, uint32_t vcpu_id, struct ucall *uc); #define GUEST_ASSERT_4(_condition, arg1, arg2, arg3, arg4) \ __GUEST_ASSERT((_condition), 4, (arg1), (arg2), (arg3), (arg4))

+int vm_get_statsfd(struct kvm_vm *vm); +int vcpu_get_statsfd(struct kvm_vm *vm, uint32_t vcpuid); + #endif /* SELFTEST_KVM_UTIL_H */ diff --git a/tools/testing/selftests/kvm/kvm_bin_form_stats.c b/tools/testing/selftests/kvm/kvm_bin_form_stats.c new file mode 100644 index 000000000000..486e54ff2e1e --- /dev/null +++ b/tools/testing/selftests/kvm/kvm_bin_form_stats.c @@ -0,0 +1,380 @@ +// SPDX-License-Identifier: GPL-2.0-only +/* + * kvm_bin_form_stats + * + * Copyright (C) 2021, Google LLC. + * + * Test the fd-based interface for KVM statistics. + */ + +#define _GNU_SOURCE /* for program_invocation_short_name */ +#include <fcntl.h> +#include <stdio.h> +#include <stdlib.h> +#include <string.h> +#include <errno.h> + +#include "test_util.h" + +#include "kvm_util.h" +#include "asm/kvm.h" +#include "linux/kvm.h" + +int vm_stats_test(struct kvm_vm *vm) +{ + ssize_t ret; + int i, stats_fd, err = -1; + size_t size_desc, size_data = 0; + struct kvm_stats_header header; + struct kvm_stats_desc *stats_desc, *pdesc; + struct kvm_vm_stats_data *stats_data; + + /* Get fd for VM stats */ + stats_fd = vm_get_statsfd(vm); + if (stats_fd < 0) { + perror("Get VM stats fd"); + return err; + } + /* Read kvm vm stats header */ + ret = read(stats_fd, &header, sizeof(header)); + if (ret != sizeof(header)) { + perror("Read VM stats header"); + goto out_close_fd; + } + size_desc = sizeof(*stats_desc) + header.name_size; + /* Check id string in header, that should start with "kvm" */ + if (strncmp(header.id, "kvm", 3) || + strlen(header.id) >= KVM_STATS_ID_MAXLEN) { + printf("Invalid KVM VM stats type!\n"); + goto out_close_fd; + } + /* Sanity check for other fields in header */ + if (header.count == 0) { + err = 0; + goto out_close_fd; + } + /* Check overlap */ + if (header.desc_offset == 0 || header.data_offset == 0 || + header.desc_offset < sizeof(header) || + header.data_offset < sizeof(header)) { + printf("Invalid offset fields in header!\n"); + goto out_close_fd; + } + if (header.desc_offset < header.data_offset && + (header.desc_offset + size_desc * header.count > + header.data_offset)) { + printf("VM Descriptor block is overlapped with data block!\n"); + goto out_close_fd; + } + + /* Allocate memory for stats descriptors */ + stats_desc = calloc(header.count, size_desc); + if (!stats_desc) { + perror("Allocate memory for VM stats descriptors"); + goto out_close_fd; + } + /* Read kvm vm stats descriptors */ + ret = pread(stats_fd, stats_desc, + size_desc * header.count, header.desc_offset); + if (ret != size_desc * header.count) { + perror("Read KVM VM stats descriptors"); + goto out_free_desc; + } + /* Sanity check for fields in descriptors */ + for (i = 0; i < header.count; ++i) { + pdesc = (void *)stats_desc + i * size_desc; + /* Check type,unit,scale boundaries */ + if ((pdesc->flags & KVM_STATS_TYPE_MASK) > KVM_STATS_TYPE_MAX) { + printf("Unknown KVM stats type!\n"); + goto out_free_desc; + } + if ((pdesc->flags & KVM_STATS_UNIT_MASK) > KVM_STATS_UNIT_MAX) { + printf("Unknown KVM stats unit!\n"); + goto out_free_desc; + } + if ((pdesc->flags & KVM_STATS_SCALE_MASK) > + KVM_STATS_SCALE_MAX) { + printf("Unknown KVM stats scale!\n"); + goto out_free_desc; + } + /* Check exponent for stats unit + * Exponent for counter should be greater than or equal to 0 + * Exponent for unit bytes should be greater than or equal to 0 + * Exponent for unit seconds should be less than or equal to 0 + * Exponent for unit clock cycles should be greater than or + * equal to 0 + */ + switch (pdesc->flags & KVM_STATS_UNIT_MASK) { + case KVM_STATS_UNIT_NONE: + case KVM_STATS_UNIT_BYTES: + case KVM_STATS_UNIT_CYCLES: + if (pdesc->exponent < 0) { + printf("Unsupported KVM stats unit!\n"); + goto out_free_desc; + } + break; + case KVM_STATS_UNIT_SECONDS: + if (pdesc->exponent > 0) { + printf("Unsupported KVM stats unit!\n"); + goto out_free_desc; + } + break; + } + /* Check name string */ + if (strlen(pdesc->name) >= header.name_size) { + printf("KVM stats name(%s) too long!\n", pdesc->name); + goto out_free_desc; + } + /* Check size field, which should not be zero */ + if (pdesc->size == 0) { + printf("KVM descriptor(%s) with size of 0!\n", + pdesc->name); + goto out_free_desc; + } + size_data += pdesc->size * sizeof(stats_data->value[0]); + } + /* Check overlap */ + if (header.data_offset < header.desc_offset && + header.data_offset + size_data > header.desc_offset) { + printf("Data block is overlapped with Descriptor block!\n"); + goto out_free_desc; + } + /* Check validity of all stats data size */ + if (size_data < header.count * sizeof(stats_data->value[0])) { + printf("Data size is not correct!\n"); + goto out_free_desc; + } + + /* Allocate memory for stats data */ + stats_data = malloc(size_data); + if (!stats_data) { + perror("Allocate memory for VM stats data"); + goto out_free_desc; + } + /* Read kvm vm stats data */ + ret = pread(stats_fd, stats_data, size_data, header.data_offset); + if (ret != size_data) { + perror("Read KVM VM stats data"); + goto out_free_data; + } + + err = 0; +out_free_data: + free(stats_data); +out_free_desc: + free(stats_desc); +out_close_fd: + close(stats_fd); + return err; +} + +int vcpu_stats_test(struct kvm_vm *vm, int vcpu_id) +{ + ssize_t ret; + int i, stats_fd, err = -1; + size_t size_desc, size_data = 0; + struct kvm_stats_header header; + struct kvm_stats_desc *stats_desc, *pdesc; + struct kvm_vcpu_stats_data *stats_data; + + /* Get fd for VCPU stats */ + stats_fd = vcpu_get_statsfd(vm, vcpu_id); + if (stats_fd < 0) { + perror("Get VCPU stats fd"); + return err; + } + /* Read kvm vcpu stats header */ + ret = read(stats_fd, &header, sizeof(header)); + if (ret != sizeof(header)) { + perror("Read VCPU stats header"); + goto out_close_fd; + } + size_desc = sizeof(*stats_desc) + header.name_size; + /* Check id string in header, that should start with "kvm" */ + if (strncmp(header.id, "kvm", 3) || + strlen(header.id) >= KVM_STATS_ID_MAXLEN) { + printf("Invalid KVM VCPU stats type!\n"); + goto out_close_fd; + } + /* Sanity check for other fields in header */ + if (header.count == 0) { + err = 0; + goto out_close_fd; + } + /* Check overlap */ + if (header.desc_offset == 0 || header.data_offset == 0 || + header.desc_offset < sizeof(header) || + header.data_offset < sizeof(header)) { + printf("Invalid offset fields in header!\n"); + goto out_close_fd; + } + if (header.desc_offset < header.data_offset && + (header.desc_offset + size_desc * header.count > + header.data_offset)) { + printf("VCPU Descriptor block is overlapped with data block!\n"); + goto out_close_fd; + } + + /* Allocate memory for stats descriptors */ + stats_desc = calloc(header.count, size_desc); + if (!stats_desc) { + perror("Allocate memory for VCPU stats descriptors"); + goto out_close_fd; + } + /* Read kvm vcpu stats descriptors */ + ret = pread(stats_fd, stats_desc, + size_desc * header.count, header.desc_offset); + if (ret != size_desc * header.count) { + perror("Read KVM VCPU stats descriptors"); + goto out_free_desc; + } + /* Sanity check for fields in descriptors */ + for (i = 0; i < header.count; ++i) { + pdesc = (void *)stats_desc + i * size_desc; + /* Check boundaries */ + if ((pdesc->flags & KVM_STATS_TYPE_MASK) > KVM_STATS_TYPE_MAX) { + printf("Unknown KVM stats type!\n"); + goto out_free_desc; + } + if ((pdesc->flags & KVM_STATS_UNIT_MASK) > KVM_STATS_UNIT_MAX) { + printf("Unknown KVM stats unit!\n"); + goto out_free_desc; + } + if ((pdesc->flags & KVM_STATS_SCALE_MASK) > + KVM_STATS_SCALE_MAX) { + printf("Unknown KVM stats scale!\n"); + goto out_free_desc; + } + /* Check exponent for stats unit + * Exponent for counter should be greater than or equal to 0 + * Exponent for unit bytes should be greater than or equal to 0 + * Exponent for unit seconds should be less than or equal to 0 + * Exponent for unit clock cycles should be greater than or + * equal to 0 + */ + switch (pdesc->flags & KVM_STATS_UNIT_MASK) { + case KVM_STATS_UNIT_NONE: + case KVM_STATS_UNIT_BYTES: + case KVM_STATS_UNIT_CYCLES: + if (pdesc->exponent < 0) { + printf("Unsupported KVM stats unit!\n"); + goto out_free_desc; + } + break; + case KVM_STATS_UNIT_SECONDS: + if (pdesc->exponent > 0) { + printf("Unsupported KVM stats unit!\n"); + goto out_free_desc; + } + break; + } + /* Check name string */ + if (strlen(pdesc->name) >= header.name_size) { + printf("KVM stats name(%s) too long!\n", pdesc->name); + goto out_free_desc; + } + /* Check size field, which should not be zero */ + if (pdesc->size == 0) { + printf("KVM descriptor(%s) with size of 0!\n", + pdesc->name); + goto out_free_desc; + } + size_data += pdesc->size * sizeof(stats_data->value[0]); + } + /* Check overlap */ + if (header.data_offset < header.desc_offset && + header.data_offset + size_data > header.desc_offset) { + printf("Data block is overlapped with Descriptor block!\n"); + goto out_free_desc; + } + /* Check validity of all stats data size */ + if (size_data < header.count * sizeof(stats_data->value[0])) { + printf("Data size is not correct!\n"); + goto out_free_desc; + } + + /* Allocate memory for stats data */ + stats_data = malloc(size_data); + if (!stats_data) { + perror("Allocate memory for VCPU stats data"); + goto out_free_desc; + } + /* Read kvm vcpu stats data */ + ret = pread(stats_fd, stats_data, size_data, header.data_offset); + if (ret != size_data) { + perror("Read KVM VCPU stats data"); + goto out_free_data; + } + + err = 0; +out_free_data: + free(stats_data); +out_free_desc: + free(stats_desc); +out_close_fd: + close(stats_fd); + return err; +} + +/* + * Usage: kvm_bin_form_stats [#vm] [#vcpu] + * The first parameter #vm set the number of VMs being created. + * The second parameter #vcpu set the number of VCPUs being created. + * By default, 1 VM and 1 VCPU for the VM would be created for testing. + */ + +int main(int argc, char *argv[]) +{ + int max_vm = 1, max_vcpu = 1, ret, i, j, err = -1; + struct kvm_vm **vms; + + /* Get the number of VMs and VCPUs that would be created for testing. */ + if (argc > 1) { + max_vm = strtol(argv[1], NULL, 0); + if (max_vm <= 0) + max_vm = 1; + } + if (argc > 2 ) { + max_vcpu = strtol(argv[2], NULL, 0); + if (max_vcpu <= 0) + max_vcpu = 1; + } + + /* Check the extension for binary stats */ + ret = kvm_check_cap(KVM_CAP_STATS_BINARY_FD); + if (ret < 0) { + printf("Binary form statistics interface is not supported!\n"); + return err; + } + + /* Create VMs and VCPUs */ + vms = malloc(sizeof(vms[0]) * max_vm); + if (!vms) { + perror("Allocate memory for storing VM pointers"); + return err; + } + for (i = 0; i < max_vm; ++i) { + vms[i] = vm_create(VM_MODE_DEFAULT, + DEFAULT_GUEST_PHY_PAGES, O_RDWR); + for (j = 0; j < max_vcpu; ++j) { + vm_vcpu_add(vms[i], j); + } + } + + /* Check stats read for every VM and VCPU */ + for (i = 0; i < max_vm; ++i) { + if (vm_stats_test(vms[i])) + goto out_free_vm; + for (j = 0; j < max_vcpu; ++j) { + if (vcpu_stats_test(vms[i], j)) + goto out_free_vm; + } + } + + err = 0; +out_free_vm: + for (i = 0; i < max_vm; ++i) + kvm_vm_free(vms[i]); + free(vms); + return err; +} diff --git a/tools/testing/selftests/kvm/lib/kvm_util.c b/tools/testing/selftests/kvm/lib/kvm_util.c index fc83f6c5902d..9b5768f893f9 100644 --- a/tools/testing/selftests/kvm/lib/kvm_util.c +++ b/tools/testing/selftests/kvm/lib/kvm_util.c @@ -2090,3 +2090,14 @@ unsigned int vm_calc_num_guest_pages(enum vm_guest_mode mode, size_t size) n = DIV_ROUND_UP(size, vm_guest_mode_params[mode].page_size); return vm_adjust_num_guest_pages(mode, n); } + +int vm_get_statsfd(struct kvm_vm *vm) +{ + return ioctl(vm->fd, KVM_STATS_GETFD, NULL); +} + +int vcpu_get_statsfd(struct kvm_vm *vm, uint32_t vcpuid) +{ + struct vcpu *vcpu = vcpu_find(vm, vcpuid); + return ioctl(vcpu->fd, KVM_STATS_GETFD, NULL); +}