[PATCH v5 2/4] KVM: stats: Add fd-based API to read binary stats data

Jing Zhang
2021-05-17T16:23:58Z

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 | 26 +++++
arch/mips/kvm/mips.c | 52 +++++++++
arch/powerpc/kvm/book3s.c | 52 +++++++++
arch/powerpc/kvm/booke.c | 45 ++++++++
arch/s390/kvm/kvm-s390.c | 117 ++++++++++++++++++++
arch/x86/kvm/x86.c | 53 +++++++++
include/linux/kvm_host.h | 127 ++++++++++++++++++++++
include/uapi/linux/kvm.h | 50 +++++++++
virt/kvm/kvm_main.c | 223 ++++++++++++++++++++++++++++++++++++++
9 files changed, 745 insertions(+)

diff --git a/arch/arm64/kvm/guest.c b/arch/arm64/kvm/guest.c
index 0e41331b0911..1cc1d83630ac 100644
--- a/arch/arm64/kvm/guest.c
+++ b/arch/arm64/kvm/guest.c
@@ -28,6 +28,32 @@

#include "trace.h"

+struct _kvm_stats_desc kvm_vm_stats_desc[] = DEFINE_VM_STATS_DESC();
+
+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[] = DEFINE_VCPU_STATS_DESC(
+ 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 f4fc60c05e9c..f17a65743ccd 100644
--- a/arch/mips/kvm/mips.c
+++ b/arch/mips/kvm/mips.c
@@ -38,6 +38,58 @@
#define VECTORSPACING 0x100 /* for EI/VI mode */
#endif

+struct _kvm_stats_desc kvm_vm_stats_desc[] = DEFINE_VM_STATS_DESC();
+
+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[] = DEFINE_VCPU_STATS_DESC(
+ 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..5e8ee0d39ef9 100644
--- a/arch/powerpc/kvm/book3s.c
+++ b/arch/powerpc/kvm/book3s.c
@@ -38,6 +38,58 @@

/* #define EXIT_DEBUG */

+struct _kvm_stats_desc kvm_vm_stats_desc[] = DEFINE_VM_STATS_DESC(
+ 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[] = DEFINE_VCPU_STATS_DESC(
+ 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..86d221e9193e 100644
--- a/arch/powerpc/kvm/booke.c
+++ b/arch/powerpc/kvm/booke.c
@@ -36,6 +36,51 @@

unsigned long kvmppc_booke_handlers;

+struct _kvm_stats_desc kvm_vm_stats_desc[] = DEFINE_VM_STATS_DESC(
+ 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[] = DEFINE_VCPU_STATS_DESC(
+ 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..003feee79fce 100644
--- a/arch/s390/kvm/kvm-s390.c
+++ b/arch/s390/kvm/kvm-s390.c
@@ -58,6 +58,123 @@
#define VCPU_IRQS_MAX_BUF (sizeof(struct kvm_s390_irq) * \
(KVM_MAX_VCPUS + LOCAL_IRQS))

+struct _kvm_stats_desc kvm_vm_stats_desc[] = DEFINE_VM_STATS_DESC(
+ 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[] = DEFINE_VCPU_STATS_DESC(
+ 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 9a93d80caff6..84880687c199 100644
--- a/arch/x86/kvm/x86.c
+++ b/arch/x86/kvm/x86.c
@@ -214,6 +214,59 @@ EXPORT_SYMBOL_GPL(host_xss);
u64 __read_mostly supported_xss;
EXPORT_SYMBOL_GPL(supported_xss);

+struct _kvm_stats_desc kvm_vm_stats_desc[] = DEFINE_VM_STATS_DESC(
+ 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[] = DEFINE_VCPU_STATS_DESC(
+ 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 97700e41db3b..52783f8062ca 100644
--- a/include/linux/kvm_host.h
+++ b/include/linux/kvm_host.h
@@ -1240,6 +1240,19 @@ 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 48
+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)

@@ -1253,8 +1266,122 @@ 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 DEFINE_VM_STATS_DESC(...) { \
+ STATS_DESC_COUNTER("remote_tlb_flush"), \
+ ## __VA_ARGS__ \
+}
+
+#define DEFINE_VCPU_STATS_DESC(...) { \
+ 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"), \
+ ## __VA_ARGS__ \
+}
+
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 3fd9a7e9d90c..a64e92c7d9de 100644
--- a/include/uapi/linux/kvm.h
+++ b/include/uapi/linux/kvm.h
@@ -1082,6 +1082,7 @@ struct kvm_ppc_resize_hpt {
#define KVM_CAP_SGX_ATTRIBUTE 196
#define KVM_CAP_VM_COPY_ENC_CONTEXT_FROM 197
#define KVM_CAP_PTP_KVM 198
+#define KVM_CAP_STATS_BINARY_FD 199

#ifdef KVM_CAP_IRQ_ROUTING

@@ -1898,4 +1899,53 @@ 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 34a4cf265297..9e2c8dcdeae9 100644
--- a/virt/kvm/kvm_main.c
+++ b/virt/kvm/kvm_main.c
@@ -3409,6 +3409,115 @@ 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 const 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)
{
@@ -3606,6 +3715,10 @@ 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);
}
@@ -3864,6 +3977,8 @@ 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;
}
@@ -3967,6 +4082,111 @@ 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 const 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)
{
@@ -4149,6 +4369,9 @@ 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);
}
--
2.31.1.751.gd2f1c929bd-goog