[PATCH v8 2/4] KVM: stats: Add fd-based API to read binary stats data

Jing Zhang
2021-06-11T12:46:45Z

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

Reviewed-by: David Matlack <dmatlack@google.com>
Reviewed-by: Ricardo Koller <ricarkol@google.com>
Reviewed-by: Krish Sadhukhan <krish.sadhukhan@oracle.com>
Signed-off-by: Jing Zhang <jingzhangos@google.com>
---
arch/arm64/kvm/guest.c | 34 +++++++++
arch/mips/kvm/mips.c | 59 ++++++++++++++++
arch/powerpc/kvm/book3s.c | 60 ++++++++++++++++
arch/powerpc/kvm/booke.c | 53 ++++++++++++++
arch/s390/kvm/kvm-s390.c | 125 +++++++++++++++++++++++++++++++++
arch/x86/kvm/x86.c | 61 ++++++++++++++++
include/linux/kvm_host.h | 129 ++++++++++++++++++++++++++++++++++
include/uapi/linux/kvm.h | 46 ++++++++++++
virt/kvm/kvm_main.c | 143 ++++++++++++++++++++++++++++++++++++++
9 files changed, 710 insertions(+)

diff --git a/arch/arm64/kvm/guest.c b/arch/arm64/kvm/guest.c
index 4962331d01e6..7048603f4b26 100644
--- a/arch/arm64/kvm/guest.c
+++ b/arch/arm64/kvm/guest.c
@@ -28,6 +28,40 @@

#include "trace.h"

+struct _kvm_stats_desc kvm_vm_stats_desc[] = {
+ KVM_GENERIC_VM_STATS()
+};
+
+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[] = {
+ KVM_GENERIC_VCPU_STATS(),
+ 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_GENERIC("halt_successful_poll", halt_successful_poll),
VCPU_STAT_GENERIC("halt_attempted_poll", halt_attempted_poll),
diff --git a/arch/mips/kvm/mips.c b/arch/mips/kvm/mips.c
index ff205b35719b..8fc70539a83b 100644
--- a/arch/mips/kvm/mips.c
+++ b/arch/mips/kvm/mips.c
@@ -38,6 +38,65 @@
#define VECTORSPACING 0x100 /* for EI/VI mode */
#endif

+struct _kvm_stats_desc kvm_vm_stats_desc[] = {
+ KVM_GENERIC_VM_STATS()
+};
+
+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[] = {
+ KVM_GENERIC_VCPU_STATS(),
+ 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 92cdb4175945..eff5a96aa638 100644
--- a/arch/powerpc/kvm/book3s.c
+++ b/arch/powerpc/kvm/book3s.c
@@ -38,6 +38,66 @@

/* #define EXIT_DEBUG */

+struct _kvm_stats_desc kvm_vm_stats_desc[] = {
+ KVM_GENERIC_VM_STATS(),
+ 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[] = {
+ KVM_GENERIC_VCPU_STATS(),
+ 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 80d3b39aa7ac..5b0c4dff4f10 100644
--- a/arch/powerpc/kvm/booke.c
+++ b/arch/powerpc/kvm/booke.c
@@ -36,6 +36,59 @@

unsigned long kvmppc_booke_handlers;

+struct _kvm_stats_desc kvm_vm_stats_desc[] = {
+ KVM_GENERIC_VM_STATS(),
+ 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[] = {
+ KVM_GENERIC_VCPU_STATS(),
+ 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 e8bc7cd06794..522a6ac2e347 100644
--- a/arch/s390/kvm/kvm-s390.c
+++ b/arch/s390/kvm/kvm-s390.c
@@ -58,6 +58,131 @@
#define VCPU_IRQS_MAX_BUF (sizeof(struct kvm_s390_irq) * \
(KVM_MAX_VCPUS + LOCAL_IRQS))

+struct _kvm_stats_desc kvm_vm_stats_desc[] = {
+ KVM_GENERIC_VM_STATS(),
+ 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[] = {
+ KVM_GENERIC_VCPU_STATS(),
+ 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 df267b6b8cb7..abc5cc8293b3 100644
--- a/arch/x86/kvm/x86.c
+++ b/arch/x86/kvm/x86.c
@@ -221,6 +221,67 @@ EXPORT_SYMBOL_GPL(host_xss);
u64 __read_mostly supported_xss;
EXPORT_SYMBOL_GPL(supported_xss);

+struct _kvm_stats_desc kvm_vm_stats_desc[] = {
+ KVM_GENERIC_VM_STATS(),
+ 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[] = {
+ KVM_GENERIC_VCPU_STATS(),
+ 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 5a31e0696360..5e77f32abef5 100644
--- a/include/linux/kvm_host.h
+++ b/include/linux/kvm_host.h
@@ -1272,6 +1272,17 @@ struct kvm_stats_debugfs_item {
int mode;
};

+struct _kvm_stats_header {
+ struct kvm_stats_header header;
+ char id[KVM_STATS_ID_MAXLEN];
+};
+
+#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)

@@ -1285,8 +1296,126 @@ struct kvm_stats_debugfs_item {
{ n, offsetof(struct kvm_vcpu, stat.generic.x), \
KVM_STAT_VCPU, ## __VA_ARGS__ }

+#define STATS_DESC(stat, type, unit, base, exp) \
+ { \
+ { \
+ .flags = type | unit | base | \
+ BUILD_BUG_ON_ZERO(type & ~KVM_STATS_TYPE_MASK) | \
+ BUILD_BUG_ON_ZERO(unit & ~KVM_STATS_UNIT_MASK) | \
+ BUILD_BUG_ON_ZERO(base & ~KVM_STATS_BASE_MASK), \
+ .exponent = exp, \
+ .size = 1 \
+ }, \
+ .name = stat, \
+ }
+#define STATS_DESC_CUMULATIVE(name, unit, base, exponent) \
+ STATS_DESC(name, KVM_STATS_TYPE_CUMULATIVE, unit, base, exponent)
+#define STATS_DESC_INSTANT(name, unit, base, exponent) \
+ STATS_DESC(name, KVM_STATS_TYPE_INSTANT, unit, base, exponent)
+
+/* Cumulative counter */
+#define STATS_DESC_COUNTER(name) \
+ STATS_DESC_CUMULATIVE(name, KVM_STATS_UNIT_NONE, \
+ KVM_STATS_BASE_POW10, 0)
+/* Instantaneous counter */
+#define STATS_DESC_ICOUNTER(name) \
+ STATS_DESC_INSTANT(name, KVM_STATS_UNIT_NONE, \
+ KVM_STATS_BASE_POW10, 0)
+
+/* Cumulative clock cycles */
+#define STATS_DESC_CYCLE(name) \
+ STATS_DESC_CUMULATIVE(name, KVM_STATS_UNIT_CYCLES, \
+ KVM_STATS_BASE_POW10, 0)
+/* Instantaneous clock cycles */
+#define STATS_DESC_ICYCLE(name) \
+ STATS_DESC_INSTANT(name, KVM_STATS_UNIT_CYCLES, \
+ KVM_STATS_BASE_POW10, 0)
+
+/* Cumulative memory size in Byte */
+#define STATS_DESC_SIZE_BYTE(name) \
+ STATS_DESC_CUMULATIVE(name, KVM_STATS_UNIT_BYTES, \
+ KVM_STATS_BASE_POW2, 0)
+/* Cumulative memory size in KiByte */
+#define STATS_DESC_SIZE_KBYTE(name) \
+ STATS_DESC_CUMULATIVE(name, KVM_STATS_UNIT_BYTES, \
+ KVM_STATS_BASE_POW2, 10)
+/* Cumulative memory size in MiByte */
+#define STATS_DESC_SIZE_MBYTE(name) \
+ STATS_DESC_CUMULATIVE(name, KVM_STATS_UNIT_BYTES, \
+ KVM_STATS_BASE_POW2, 20)
+/* Cumulative memory size in GiByte */
+#define STATS_DESC_SIZE_GBYTE(name) \
+ STATS_DESC_CUMULATIVE(name, KVM_STATS_UNIT_BYTES, \
+ KVM_STATS_BASE_POW2, 30)
+
+/* Instantaneous memory size in Byte */
+#define STATS_DESC_ISIZE_BYTE(name) \
+ STATS_DESC_INSTANT(name, KVM_STATS_UNIT_BYTES, \
+ KVM_STATS_BASE_POW2, 0)
+/* Instantaneous memory size in KiByte */
+#define STATS_DESC_ISIZE_KBYTE(name) \
+ STATS_DESC_INSTANT(name, KVM_STATS_UNIT_BYTES, \
+ KVM_STATS_BASE_POW2, 10)
+/* Instantaneous memory size in MiByte */
+#define STATS_DESC_ISIZE_MBYTE(name) \
+ STATS_DESC_INSTANT(name, KVM_STATS_UNIT_BYTES, \
+ KVM_STATS_BASE_POW2, 20)
+/* Instantaneous memory size in GiByte */
+#define STATS_DESC_ISIZE_GBYTE(name) \
+ STATS_DESC_INSTANT(name, KVM_STATS_UNIT_BYTES, \
+ KVM_STATS_BASE_POW2, 30)
+
+/* Cumulative time in second */
+#define STATS_DESC_TIME_SEC(name) \
+ STATS_DESC_CUMULATIVE(name, KVM_STATS_UNIT_SECONDS, \
+ KVM_STATS_BASE_POW10, 0)
+/* Cumulative time in millisecond */
+#define STATS_DESC_TIME_MSEC(name) \
+ STATS_DESC_CUMULATIVE(name, KVM_STATS_UNIT_SECONDS, \
+ KVM_STATS_BASE_POW10, -3)
+/* Cumulative time in microsecond */
+#define STATS_DESC_TIME_USEC(name) \
+ STATS_DESC_CUMULATIVE(name, KVM_STATS_UNIT_SECONDS, \
+ KVM_STATS_BASE_POW10, -6)
+/* Cumulative time in nanosecond */
+#define STATS_DESC_TIME_NSEC(name) \
+ STATS_DESC_CUMULATIVE(name, KVM_STATS_UNIT_SECONDS, \
+ KVM_STATS_BASE_POW10, -9)
+
+/* Instantaneous time in second */
+#define STATS_DESC_ITIME_SEC(name) \
+ STATS_DESC_INSTANT(name, KVM_STATS_UNIT_SECONDS, \
+ KVM_STATS_BASE_POW10, 0)
+/* Instantaneous time in millisecond */
+#define STATS_DESC_ITIME_MSEC(name) \
+ STATS_DESC_INSTANT(name, KVM_STATS_UNIT_SECONDS, \
+ KVM_STATS_BASE_POW10, -3)
+/* Instantaneous time in microsecond */
+#define STATS_DESC_ITIME_USEC(name) \
+ STATS_DESC_INSTANT(name, KVM_STATS_UNIT_SECONDS, \
+ KVM_STATS_BASE_POW10, -6)
+/* Instantaneous time in nanosecond */
+#define STATS_DESC_ITIME_NSEC(name) \
+ STATS_DESC_INSTANT(name, KVM_STATS_UNIT_SECONDS, \
+ KVM_STATS_BASE_POW10, -9)
+
+#define KVM_GENERIC_VM_STATS() \
+ STATS_DESC_COUNTER("remote_tlb_flush")
+
+#define KVM_GENERIC_VCPU_STATS() \
+ 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 90d44138dbfb..5879e8fb6ff4 100644
--- a/include/uapi/linux/kvm.h
+++ b/include/uapi/linux/kvm.h
@@ -1085,6 +1085,7 @@ struct kvm_ppc_resize_hpt {
#define KVM_CAP_PTP_KVM 198
#define KVM_CAP_HYPERV_ENFORCE_CPUID 199
#define KVM_CAP_SREGS2 200
+#define KVM_CAP_BINARY_STATS_FD 201

#ifdef KVM_CAP_IRQ_ROUTING

@@ -1904,4 +1905,49 @@ 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 {
+ __u32 name_size;
+ __u32 count;
+ __u32 desc_offset;
+ __u32 data_offset;
+ char id[0];
+};
+
+#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_BASE_SHIFT 8
+#define KVM_STATS_BASE_MASK (0xF << KVM_STATS_BASE_SHIFT)
+#define KVM_STATS_BASE_POW10 (0x0 << KVM_STATS_BASE_SHIFT)
+#define KVM_STATS_BASE_POW2 (0x1 << KVM_STATS_BASE_SHIFT)
+#define KVM_STATS_BASE_MAX KVM_STATS_BASE_POW2
+
+struct kvm_stats_desc {
+ __u32 flags;
+ __s16 exponent;
+ __u16 size;
+ __u32 unused1;
+ __u32 unused2;
+ char name[0];
+};
+
+struct kvm_stats_data {
+ __u64 value[0];
+};
+
+#define KVM_GET_STATS_FD _IO(KVMIO, 0xce)
+
#endif /* __LINUX_KVM_H */
diff --git a/virt/kvm/kvm_main.c b/virt/kvm/kvm_main.c
index cec986487b30..f5bea71ea61c 100644
--- a/virt/kvm/kvm_main.c
+++ b/virt/kvm/kvm_main.c
@@ -3497,6 +3497,103 @@ static int kvm_vcpu_ioctl_set_sigmask(struct kvm_vcpu *vcpu, sigset_t *sigset)
return 0;
}

+static ssize_t kvm_stats_read(struct _kvm_stats_header *header,
+ struct _kvm_stats_desc *desc, void *stats, size_t size_stats,
+ char __user *user_buffer, size_t size, loff_t *offset)
+{
+ ssize_t copylen, len, remain = size;
+ size_t size_header, size_desc;
+ loff_t pos = *offset;
+ char __user *dest = user_buffer;
+ void *src;
+
+ size_header = sizeof(*header);
+ size_desc = header->header.count * sizeof(*desc);
+
+ len = size_header + size_desc + size_stats - pos;
+ len = min(len, remain);
+ if (len <= 0)
+ return 0;
+ remain = len;
+
+ /* Copy kvm stats header */
+ copylen = size_header - pos;
+ copylen = min(copylen, remain);
+ if (copylen > 0) {
+ src = (void *)header + pos;
+ if (copy_to_user(dest, src, copylen))
+ return -EFAULT;
+ remain -= copylen;
+ pos += copylen;
+ dest += copylen;
+ }
+ /* Copy kvm stats descriptors */
+ copylen = header->header.desc_offset + size_desc - pos;
+ copylen = min(copylen, remain);
+ if (copylen > 0) {
+ src = (void *)desc + pos - header->header.desc_offset;
+ if (copy_to_user(dest, src, copylen))
+ return -EFAULT;
+ remain -= copylen;
+ pos += copylen;
+ dest += copylen;
+ }
+ /* Copy kvm stats values */
+ copylen = header->header.data_offset + size_stats - pos;
+ copylen = min(copylen, remain);
+ if (copylen > 0) {
+ src = stats + pos - header->header.data_offset;
+ if (copy_to_user(dest, src, copylen))
+ return -EFAULT;
+ remain -= copylen;
+ pos += copylen;
+ dest += copylen;
+ }
+
+ *offset = pos;
+ return len;
+}
+
+static ssize_t kvm_vcpu_stats_read(struct file *file, char __user *user_buffer,
+ size_t size, loff_t *offset)
+{
+ struct kvm_vcpu *vcpu = file->private_data;
+
+ snprintf(&kvm_vcpu_stats_header.id[0], sizeof(kvm_vcpu_stats_header.id),
+ "kvm-%d/vcpu-%d", task_pid_nr(current), vcpu->vcpu_id);
+ return kvm_stats_read(&kvm_vcpu_stats_header,
+ &kvm_vcpu_stats_desc[0], &vcpu->stat,
+ sizeof(vcpu->stat), user_buffer, size, offset);
+}
+
+static const struct file_operations kvm_vcpu_stats_fops = {
+ .read = kvm_vcpu_stats_read,
+ .llseek = noop_llseek,
+};
+
+static int kvm_vcpu_ioctl_get_stats_fd(struct kvm_vcpu *vcpu)
+{
+ int fd;
+ struct file *file;
+ char name[15 + ITOA_MAX_LEN + 1];
+
+ snprintf(name, sizeof(name), "kvm-vcpu-stats:%d", vcpu->vcpu_id);
+
+ fd = get_unused_fd_flags(O_CLOEXEC);
+ if (fd < 0)
+ return fd;
+
+ file = anon_inode_getfile(name, &kvm_vcpu_stats_fops, vcpu, O_RDONLY);
+ if (IS_ERR(file)) {
+ put_unused_fd(fd);
+ return PTR_ERR(file);
+ }
+ file->f_mode |= FMODE_PREAD;
+ fd_install(fd, file);
+
+ return fd;
+}
+
static long kvm_vcpu_ioctl(struct file *filp,
unsigned int ioctl, unsigned long arg)
{
@@ -3694,6 +3791,10 @@ static long kvm_vcpu_ioctl(struct file *filp,
r = kvm_arch_vcpu_ioctl_set_fpu(vcpu, fpu);
break;
}
+ case KVM_GET_STATS_FD: {
+ r = kvm_vcpu_ioctl_get_stats_fd(vcpu);
+ break;
+ }
default:
r = kvm_arch_vcpu_ioctl(filp, ioctl, arg);
}
@@ -3952,6 +4053,8 @@ static long kvm_vm_ioctl_check_extension_generic(struct kvm *kvm, long arg)
#else
return 0;
#endif
+ case KVM_CAP_BINARY_STATS_FD:
+ return 1;
default:
break;
}
@@ -4055,6 +4158,43 @@ 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)
+{
+ struct kvm *kvm = file->private_data;
+
+ snprintf(&kvm_vm_stats_header.id[0], sizeof(kvm_vm_stats_header.id),
+ "kvm-%d", task_pid_nr(current));
+ return kvm_stats_read(&kvm_vm_stats_header, &kvm_vm_stats_desc[0],
+ &kvm->stat, sizeof(kvm->stat), user_buffer, size, offset);
+}
+
+static const struct file_operations kvm_vm_stats_fops = {
+ .read = kvm_vm_stats_read,
+ .llseek = noop_llseek,
+};
+
+static int kvm_vm_ioctl_get_stats_fd(struct kvm *kvm)
+{
+ int fd;
+ struct file *file;
+
+ fd = get_unused_fd_flags(O_CLOEXEC);
+ if (fd < 0)
+ return fd;
+
+ file = anon_inode_getfile("kvm-vm-stats",
+ &kvm_vm_stats_fops, kvm, O_RDONLY);
+ if (IS_ERR(file)) {
+ put_unused_fd(fd);
+ return PTR_ERR(file);
+ }
+ file->f_mode |= FMODE_PREAD;
+ fd_install(fd, file);
+
+ return fd;
+}
+
static long kvm_vm_ioctl(struct file *filp,
unsigned int ioctl, unsigned long arg)
{
@@ -4237,6 +4377,9 @@ static long kvm_vm_ioctl(struct file *filp,
case KVM_RESET_DIRTY_RINGS:
r = kvm_vm_ioctl_reset_dirty_pages(kvm);
break;
+ case KVM_GET_STATS_FD:
+ r = kvm_vm_ioctl_get_stats_fd(kvm);
+ break;
default:
r = kvm_arch_vm_ioctl(filp, ioctl, arg);
}
--
2.32.0.272.g935e593368-goog