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charset="us-ascii" Content-Transfer-Encoding: 7bit Errors-To: kvmarm-bounces@lists.cs.columbia.edu Sender: kvmarm-bounces@lists.cs.columbia.edu Add a VM ioctl to get a statistics file descriptor by which a read functionality is provided for userspace to read out VM stats header, descriptors and data. Define VM statistics descriptors and header for all architectures. Reviewed-by: David Matlack Reviewed-by: Ricardo Koller Reviewed-by: Krish Sadhukhan Reviewed-by: Fuad Tabba Tested-by: Fuad Tabba #arm64 Signed-off-by: Jing Zhang --- arch/arm64/kvm/guest.c | 14 +++++++++++++ arch/mips/kvm/mips.c | 14 +++++++++++++ arch/powerpc/kvm/book3s.c | 16 +++++++++++++++ arch/powerpc/kvm/booke.c | 16 +++++++++++++++ arch/s390/kvm/kvm-s390.c | 19 +++++++++++++++++ arch/x86/kvm/x86.c | 24 ++++++++++++++++++++++ include/linux/kvm_host.h | 6 ++++++ virt/kvm/kvm_main.c | 43 +++++++++++++++++++++++++++++++++++++++ 8 files changed, 152 insertions(+) diff --git a/arch/arm64/kvm/guest.c b/arch/arm64/kvm/guest.c index 4962331d01e6..f456d1defe2b 100644 --- a/arch/arm64/kvm/guest.c +++ b/arch/arm64/kvm/guest.c @@ -28,6 +28,20 @@ #include "trace.h" +struct _kvm_stats_desc kvm_vm_stats_desc[] = { + KVM_GENERIC_VM_STATS() +}; +static_assert(ARRAY_SIZE(kvm_vm_stats_desc) == + sizeof(struct kvm_vm_stat) / sizeof(u64)); + +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) + KVM_STATS_ID_MAXLEN, + .data_offset = sizeof(struct kvm_stats_header) + KVM_STATS_ID_MAXLEN + + sizeof(kvm_vm_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..a1c6b9c5a4ae 100644 --- a/arch/mips/kvm/mips.c +++ b/arch/mips/kvm/mips.c @@ -38,6 +38,20 @@ #define VECTORSPACING 0x100 /* for EI/VI mode */ #endif +struct _kvm_stats_desc kvm_vm_stats_desc[] = { + KVM_GENERIC_VM_STATS() +}; +static_assert(ARRAY_SIZE(kvm_vm_stats_desc) == + sizeof(struct kvm_vm_stat) / sizeof(u64)); + +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) + KVM_STATS_ID_MAXLEN, + .data_offset = sizeof(struct kvm_stats_header) + KVM_STATS_ID_MAXLEN + + sizeof(kvm_vm_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..d3dfdddb4f7d 100644 --- a/arch/powerpc/kvm/book3s.c +++ b/arch/powerpc/kvm/book3s.c @@ -38,6 +38,22 @@ /* #define EXIT_DEBUG */ +struct _kvm_stats_desc kvm_vm_stats_desc[] = { + KVM_GENERIC_VM_STATS(), + STATS_DESC_ICOUNTER(VM, num_2M_pages), + STATS_DESC_ICOUNTER(VM, num_1G_pages) +}; +static_assert(ARRAY_SIZE(kvm_vm_stats_desc) == + sizeof(struct kvm_vm_stat) / sizeof(u64)); + +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) + KVM_STATS_ID_MAXLEN, + .data_offset = sizeof(struct kvm_stats_header) + KVM_STATS_ID_MAXLEN + + sizeof(kvm_vm_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..4e4a58b19487 100644 --- a/arch/powerpc/kvm/booke.c +++ b/arch/powerpc/kvm/booke.c @@ -36,6 +36,22 @@ unsigned long kvmppc_booke_handlers; +struct _kvm_stats_desc kvm_vm_stats_desc[] = { + KVM_GENERIC_VM_STATS(), + STATS_DESC_ICOUNTER(VM, num_2M_pages), + STATS_DESC_ICOUNTER(VM, num_1G_pages) +}; +static_assert(ARRAY_SIZE(kvm_vm_stats_desc) == + sizeof(struct kvm_vm_stat) / sizeof(u64)); + +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) + KVM_STATS_ID_MAXLEN, + .data_offset = sizeof(struct kvm_stats_header) + KVM_STATS_ID_MAXLEN + + sizeof(kvm_vm_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..89c0a2722183 100644 --- a/arch/s390/kvm/kvm-s390.c +++ b/arch/s390/kvm/kvm-s390.c @@ -58,6 +58,25 @@ #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(VM, inject_io), + STATS_DESC_COUNTER(VM, inject_float_mchk), + STATS_DESC_COUNTER(VM, inject_pfault_done), + STATS_DESC_COUNTER(VM, inject_service_signal), + STATS_DESC_COUNTER(VM, inject_virtio) +}; +static_assert(ARRAY_SIZE(kvm_vm_stats_desc) == + sizeof(struct kvm_vm_stat) / sizeof(u64)); + +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) + KVM_STATS_ID_MAXLEN, + .data_offset = sizeof(struct kvm_stats_header) + KVM_STATS_ID_MAXLEN + + sizeof(kvm_vm_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 157212157aee..a461d9d79865 100644 --- a/arch/x86/kvm/x86.c +++ b/arch/x86/kvm/x86.c @@ -223,6 +223,30 @@ 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(VM, mmu_shadow_zapped), + STATS_DESC_COUNTER(VM, mmu_pte_write), + STATS_DESC_COUNTER(VM, mmu_pde_zapped), + STATS_DESC_COUNTER(VM, mmu_flooded), + STATS_DESC_COUNTER(VM, mmu_recycled), + STATS_DESC_COUNTER(VM, mmu_cache_miss), + STATS_DESC_ICOUNTER(VM, mmu_unsync), + STATS_DESC_ICOUNTER(VM, lpages), + STATS_DESC_ICOUNTER(VM, nx_lpage_splits), + STATS_DESC_ICOUNTER(VM, max_mmu_page_hash_collisions) +}; +static_assert(ARRAY_SIZE(kvm_vm_stats_desc) == + sizeof(struct kvm_vm_stat) / sizeof(u64)); + +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) + KVM_STATS_ID_MAXLEN, + .data_offset = sizeof(struct kvm_stats_header) + KVM_STATS_ID_MAXLEN + + sizeof(kvm_vm_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 2f0d12064ae7..4c73bc761f96 100644 --- a/include/linux/kvm_host.h +++ b/include/linux/kvm_host.h @@ -599,6 +599,7 @@ struct kvm { #ifdef CONFIG_HAVE_KVM_PM_NOTIFIER struct notifier_block pm_notifier; #endif + char stats_id[KVM_STATS_ID_MAXLEN]; }; #define kvm_err(fmt, ...) \ @@ -1427,11 +1428,16 @@ struct _kvm_stats_desc { STATS_DESC_INSTANT(SCOPE, name, KVM_STATS_UNIT_SECONDS, \ KVM_STATS_BASE_POW10, -9) +#define KVM_GENERIC_VM_STATS() \ + STATS_DESC_COUNTER(VM_GENERIC, remote_tlb_flush) + extern struct kvm_stats_debugfs_item debugfs_entries[]; extern struct dentry *kvm_debugfs_dir; ssize_t kvm_stats_read(char *id, 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); +extern struct kvm_stats_header kvm_vm_stats_header; +extern struct _kvm_stats_desc kvm_vm_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/virt/kvm/kvm_main.c b/virt/kvm/kvm_main.c index cec986487b30..cf0d487272b9 100644 --- a/virt/kvm/kvm_main.c +++ b/virt/kvm/kvm_main.c @@ -4055,6 +4055,46 @@ 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; + + return kvm_stats_read(kvm->stats_id, &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); + + /* Fill the stats id string */ + snprintf(kvm->stats_id, sizeof(kvm->stats_id), + "kvm-%d", task_pid_nr(current)); + + return fd; +} + static long kvm_vm_ioctl(struct file *filp, unsigned int ioctl, unsigned long arg) { @@ -4237,6 +4277,9 @@ 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); } -- 2.32.0.288.g62a8d224e6-goog _______________________________________________ kvmarm mailing list kvmarm@lists.cs.columbia.edu https://lists.cs.columbia.edu/mailman/listinfo/kvmarm