Re: [PATCH v7 1/4] KVM: stats: Separate generic stats from architecture specific ones

Krish Sadhukhan
2021-06-07T19:23:09Z

On 6/3/21 2:14 PM, Jing Zhang wrote:
> Put all generic statistics in a separate structure to ease
> statistics handling for the incoming new statistics API.
>
> No functional change intended.
>
> Reviewed-by: David Matlack <dmatlack@google.com>
> Reviewed-by: Ricardo Koller <ricarkol@google.com>
> Signed-off-by: Jing Zhang <jingzhangos@google.com>
> ---
> arch/arm64/include/asm/kvm_host.h | 9 ++-------
> arch/arm64/kvm/guest.c | 12 ++++++------
> arch/mips/include/asm/kvm_host.h | 9 ++-------
> arch/mips/kvm/mips.c | 12 ++++++------
> arch/powerpc/include/asm/kvm_host.h | 9 ++-------
> arch/powerpc/kvm/book3s.c | 12 ++++++------
> arch/powerpc/kvm/book3s_hv.c | 12 ++++++------
> arch/powerpc/kvm/book3s_pr.c | 2 +-
> arch/powerpc/kvm/book3s_pr_papr.c | 2 +-
> arch/powerpc/kvm/booke.c | 14 +++++++-------
> arch/s390/include/asm/kvm_host.h | 9 ++-------
> arch/s390/kvm/kvm-s390.c | 12 ++++++------
> arch/x86/include/asm/kvm_host.h | 9 ++-------
> arch/x86/kvm/x86.c | 14 +++++++-------
> include/linux/kvm_host.h | 9 +++++++--
> include/linux/kvm_types.h | 12 ++++++++++++
> virt/kvm/kvm_main.c | 14 +++++++-------
> 17 files changed, 82 insertions(+), 90 deletions(-)
>
> diff --git a/arch/arm64/include/asm/kvm_host.h b/arch/arm64/include/asm/kvm_host.h
> index 7cd7d5c8c4bc..5a2c82f63baa 100644
> --- a/arch/arm64/include/asm/kvm_host.h
> +++ b/arch/arm64/include/asm/kvm_host.h
> @@ -556,16 +556,11 @@ static inline bool __vcpu_write_sys_reg_to_cpu(u64 val, int reg)
> }
>
> struct kvm_vm_stat {
> - ulong remote_tlb_flush;
> + struct kvm_vm_stat_generic generic;
> };
>
> struct kvm_vcpu_stat {
> - u64 halt_successful_poll;
> - u64 halt_attempted_poll;
> - u64 halt_poll_success_ns;
> - u64 halt_poll_fail_ns;
> - u64 halt_poll_invalid;
> - u64 halt_wakeup;
> + struct kvm_vcpu_stat_generic generic;
> u64 hvc_exit_stat;
> u64 wfe_exit_stat;
> u64 wfi_exit_stat;
> diff --git a/arch/arm64/kvm/guest.c b/arch/arm64/kvm/guest.c
> index 5cb4a1cd5603..4962331d01e6 100644
> --- a/arch/arm64/kvm/guest.c
> +++ b/arch/arm64/kvm/guest.c
> @@ -29,18 +29,18 @@
> #include "trace.h"
>
> struct kvm_stats_debugfs_item debugfs_entries[] = {
> - VCPU_STAT("halt_successful_poll", halt_successful_poll),
> - VCPU_STAT("halt_attempted_poll", halt_attempted_poll),
> - VCPU_STAT("halt_poll_invalid", halt_poll_invalid),
> - VCPU_STAT("halt_wakeup", halt_wakeup),
> + VCPU_STAT_GENERIC("halt_successful_poll", halt_successful_poll),
> + VCPU_STAT_GENERIC("halt_attempted_poll", halt_attempted_poll),
> + VCPU_STAT_GENERIC("halt_poll_invalid", halt_poll_invalid),
> + VCPU_STAT_GENERIC("halt_wakeup", halt_wakeup),
> VCPU_STAT("hvc_exit_stat", hvc_exit_stat),
> VCPU_STAT("wfe_exit_stat", wfe_exit_stat),
> VCPU_STAT("wfi_exit_stat", wfi_exit_stat),
> VCPU_STAT("mmio_exit_user", mmio_exit_user),
> VCPU_STAT("mmio_exit_kernel", mmio_exit_kernel),
> VCPU_STAT("exits", exits),
> - VCPU_STAT("halt_poll_success_ns", halt_poll_success_ns),
> - VCPU_STAT("halt_poll_fail_ns", halt_poll_fail_ns),
> + VCPU_STAT_GENERIC("halt_poll_success_ns", halt_poll_success_ns),
> + VCPU_STAT_GENERIC("halt_poll_fail_ns", halt_poll_fail_ns),
> { NULL }
> };
>
> diff --git a/arch/mips/include/asm/kvm_host.h b/arch/mips/include/asm/kvm_host.h
> index fca4547d580f..696f6b009377 100644
> --- a/arch/mips/include/asm/kvm_host.h
> +++ b/arch/mips/include/asm/kvm_host.h
> @@ -109,10 +109,11 @@ static inline bool kvm_is_error_hva(unsigned long addr)
> }
>
> struct kvm_vm_stat {
> - ulong remote_tlb_flush;
> + struct kvm_vm_stat_generic generic;
> };
>
> struct kvm_vcpu_stat {
> + struct kvm_vcpu_stat_generic generic;
> u64 wait_exits;
> u64 cache_exits;
> u64 signal_exits;
> @@ -142,12 +143,6 @@ struct kvm_vcpu_stat {
> #ifdef CONFIG_CPU_LOONGSON64
> u64 vz_cpucfg_exits;
> #endif
> - u64 halt_successful_poll;
> - u64 halt_attempted_poll;
> - u64 halt_poll_success_ns;
> - u64 halt_poll_fail_ns;
> - u64 halt_poll_invalid;
> - u64 halt_wakeup;
> };
>
> struct kvm_arch_memory_slot {
> diff --git a/arch/mips/kvm/mips.c b/arch/mips/kvm/mips.c
> index 4d4af97dcc88..ff205b35719b 100644
> --- a/arch/mips/kvm/mips.c
> +++ b/arch/mips/kvm/mips.c
> @@ -68,12 +68,12 @@ struct kvm_stats_debugfs_item debugfs_entries[] = {
> #ifdef CONFIG_CPU_LOONGSON64
> VCPU_STAT("vz_cpucfg", vz_cpucfg_exits),
> #endif
> - VCPU_STAT("halt_successful_poll", halt_successful_poll),
> - VCPU_STAT("halt_attempted_poll", halt_attempted_poll),
> - VCPU_STAT("halt_poll_invalid", halt_poll_invalid),
> - VCPU_STAT("halt_wakeup", halt_wakeup),
> - VCPU_STAT("halt_poll_success_ns", halt_poll_success_ns),
> - VCPU_STAT("halt_poll_fail_ns", halt_poll_fail_ns),
> + VCPU_STAT_GENERIC("halt_successful_poll", halt_successful_poll),
> + VCPU_STAT_GENERIC("halt_attempted_poll", halt_attempted_poll),
> + VCPU_STAT_GENERIC("halt_poll_invalid", halt_poll_invalid),
> + VCPU_STAT_GENERIC("halt_wakeup", halt_wakeup),
> + VCPU_STAT_GENERIC("halt_poll_success_ns", halt_poll_success_ns),
> + VCPU_STAT_GENERIC("halt_poll_fail_ns", halt_poll_fail_ns),
> {NULL}
> };
>
> diff --git a/arch/powerpc/include/asm/kvm_host.h b/arch/powerpc/include/asm/kvm_host.h
> index 1e83359f286b..6e41064858a1 100644
> --- a/arch/powerpc/include/asm/kvm_host.h
> +++ b/arch/powerpc/include/asm/kvm_host.h
> @@ -80,12 +80,13 @@ struct kvmppc_book3s_shadow_vcpu;
> struct kvm_nested_guest;
>
> struct kvm_vm_stat {
> - ulong remote_tlb_flush;
> + struct kvm_vm_stat_generic generic;
> ulong num_2M_pages;
> ulong num_1G_pages;
> };
>
> struct kvm_vcpu_stat {
> + struct kvm_vcpu_stat_generic generic;
> u64 sum_exits;
> u64 mmio_exits;
> u64 signal_exits;
> @@ -101,14 +102,8 @@ struct kvm_vcpu_stat {
> u64 emulated_inst_exits;
> u64 dec_exits;
> u64 ext_intr_exits;
> - u64 halt_poll_success_ns;
> - u64 halt_poll_fail_ns;
> u64 halt_wait_ns;
> - u64 halt_successful_poll;
> - u64 halt_attempted_poll;
> u64 halt_successful_wait;
> - u64 halt_poll_invalid;
> - u64 halt_wakeup;
> u64 dbell_exits;
> u64 gdbell_exits;
> u64 ld;
> diff --git a/arch/powerpc/kvm/book3s.c b/arch/powerpc/kvm/book3s.c
> index 2b691f4d1f26..92cdb4175945 100644
> --- a/arch/powerpc/kvm/book3s.c
> +++ b/arch/powerpc/kvm/book3s.c
> @@ -47,14 +47,14 @@ struct kvm_stats_debugfs_item debugfs_entries[] = {
> VCPU_STAT("dec", dec_exits),
> VCPU_STAT("ext_intr", ext_intr_exits),
> VCPU_STAT("queue_intr", queue_intr),
> - VCPU_STAT("halt_poll_success_ns", halt_poll_success_ns),
> - VCPU_STAT("halt_poll_fail_ns", halt_poll_fail_ns),
> + VCPU_STAT_GENERIC("halt_poll_success_ns", halt_poll_success_ns),
> + VCPU_STAT_GENERIC("halt_poll_fail_ns", halt_poll_fail_ns),
> VCPU_STAT("halt_wait_ns", halt_wait_ns),
> - VCPU_STAT("halt_successful_poll", halt_successful_poll),
> - VCPU_STAT("halt_attempted_poll", halt_attempted_poll),
> + VCPU_STAT_GENERIC("halt_successful_poll", halt_successful_poll),
> + VCPU_STAT_GENERIC("halt_attempted_poll", halt_attempted_poll),
> VCPU_STAT("halt_successful_wait", halt_successful_wait),
> - VCPU_STAT("halt_poll_invalid", halt_poll_invalid),
> - VCPU_STAT("halt_wakeup", halt_wakeup),
> + VCPU_STAT_GENERIC("halt_poll_invalid", halt_poll_invalid),
> + VCPU_STAT_GENERIC("halt_wakeup", halt_wakeup),
> VCPU_STAT("pf_storage", pf_storage),
> VCPU_STAT("sp_storage", sp_storage),
> VCPU_STAT("pf_instruc", pf_instruc),
> diff --git a/arch/powerpc/kvm/book3s_hv.c b/arch/powerpc/kvm/book3s_hv.c
> index 28a80d240b76..2a1cf29ba3fd 100644
> --- a/arch/powerpc/kvm/book3s_hv.c
> +++ b/arch/powerpc/kvm/book3s_hv.c
> @@ -236,7 +236,7 @@ static void kvmppc_fast_vcpu_kick_hv(struct kvm_vcpu *vcpu)
>
> waitp = kvm_arch_vcpu_get_wait(vcpu);
> if (rcuwait_wake_up(waitp))
> - ++vcpu->stat.halt_wakeup;
> + ++vcpu->stat.generic.halt_wakeup;
>
> cpu = READ_ONCE(vcpu->arch.thread_cpu);
> if (cpu >= 0 && kvmppc_ipi_thread(cpu))
> @@ -3925,7 +3925,7 @@ static void kvmppc_vcore_blocked(struct kvmppc_vcore *vc)
> cur = start_poll = ktime_get();
> if (vc->halt_poll_ns) {
> ktime_t stop = ktime_add_ns(start_poll, vc->halt_poll_ns);
> - ++vc->runner->stat.halt_attempted_poll;
> + ++vc->runner->stat.generic.halt_attempted_poll;
>
> vc->vcore_state = VCORE_POLLING;
> spin_unlock(&vc->lock);
> @@ -3942,7 +3942,7 @@ static void kvmppc_vcore_blocked(struct kvmppc_vcore *vc)
> vc->vcore_state = VCORE_INACTIVE;
>
> if (!do_sleep) {
> - ++vc->runner->stat.halt_successful_poll;
> + ++vc->runner->stat.generic.halt_successful_poll;
> goto out;
> }
> }
> @@ -3954,7 +3954,7 @@ static void kvmppc_vcore_blocked(struct kvmppc_vcore *vc)
> do_sleep = 0;
> /* If we polled, count this as a successful poll */
> if (vc->halt_poll_ns)
> - ++vc->runner->stat.halt_successful_poll;
> + ++vc->runner->stat.generic.halt_successful_poll;
> goto out;
> }
>
> @@ -3981,13 +3981,13 @@ static void kvmppc_vcore_blocked(struct kvmppc_vcore *vc)
> ktime_to_ns(cur) - ktime_to_ns(start_wait);
> /* Attribute failed poll time */
> if (vc->halt_poll_ns)
> - vc->runner->stat.halt_poll_fail_ns +=
> + vc->runner->stat.generic.halt_poll_fail_ns +=
> ktime_to_ns(start_wait) -
> ktime_to_ns(start_poll);
> } else {
> /* Attribute successful poll time */
> if (vc->halt_poll_ns)
> - vc->runner->stat.halt_poll_success_ns +=
> + vc->runner->stat.generic.halt_poll_success_ns +=
> ktime_to_ns(cur) -
> ktime_to_ns(start_poll);
> }
> diff --git a/arch/powerpc/kvm/book3s_pr.c b/arch/powerpc/kvm/book3s_pr.c
> index d7733b07f489..71bcb0140461 100644
> --- a/arch/powerpc/kvm/book3s_pr.c
> +++ b/arch/powerpc/kvm/book3s_pr.c
> @@ -493,7 +493,7 @@ static void kvmppc_set_msr_pr(struct kvm_vcpu *vcpu, u64 msr)
> if (!vcpu->arch.pending_exceptions) {
> kvm_vcpu_block(vcpu);
> kvm_clear_request(KVM_REQ_UNHALT, vcpu);
> - vcpu->stat.halt_wakeup++;
> + vcpu->stat.generic.halt_wakeup++;
>
> /* Unset POW bit after we woke up */
> msr &= ~MSR_POW;
> diff --git a/arch/powerpc/kvm/book3s_pr_papr.c b/arch/powerpc/kvm/book3s_pr_papr.c
> index 031c8015864a..ac14239f3424 100644
> --- a/arch/powerpc/kvm/book3s_pr_papr.c
> +++ b/arch/powerpc/kvm/book3s_pr_papr.c
> @@ -378,7 +378,7 @@ int kvmppc_h_pr(struct kvm_vcpu *vcpu, unsigned long cmd)
> kvmppc_set_msr_fast(vcpu, kvmppc_get_msr(vcpu) | MSR_EE);
> kvm_vcpu_block(vcpu);
> kvm_clear_request(KVM_REQ_UNHALT, vcpu);
> - vcpu->stat.halt_wakeup++;
> + vcpu->stat.generic.halt_wakeup++;
> return EMULATE_DONE;
> case H_LOGICAL_CI_LOAD:
> return kvmppc_h_pr_logical_ci_load(vcpu);
> diff --git a/arch/powerpc/kvm/booke.c b/arch/powerpc/kvm/booke.c
> index 7d5fe43f85c4..80d3b39aa7ac 100644
> --- a/arch/powerpc/kvm/booke.c
> +++ b/arch/powerpc/kvm/booke.c
> @@ -49,15 +49,15 @@ struct kvm_stats_debugfs_item debugfs_entries[] = {
> VCPU_STAT("inst_emu", emulated_inst_exits),
> VCPU_STAT("dec", dec_exits),
> VCPU_STAT("ext_intr", ext_intr_exits),
> - VCPU_STAT("halt_successful_poll", halt_successful_poll),
> - VCPU_STAT("halt_attempted_poll", halt_attempted_poll),
> - VCPU_STAT("halt_poll_invalid", halt_poll_invalid),
> - VCPU_STAT("halt_wakeup", halt_wakeup),
> + VCPU_STAT_GENERIC("halt_successful_poll", halt_successful_poll),
> + VCPU_STAT_GENERIC("halt_attempted_poll", halt_attempted_poll),
> + VCPU_STAT_GENERIC("halt_poll_invalid", halt_poll_invalid),
> + VCPU_STAT_GENERIC("halt_wakeup", halt_wakeup),
> VCPU_STAT("doorbell", dbell_exits),
> VCPU_STAT("guest doorbell", gdbell_exits),
> - VCPU_STAT("halt_poll_success_ns", halt_poll_success_ns),
> - VCPU_STAT("halt_poll_fail_ns", halt_poll_fail_ns),
> - VM_STAT("remote_tlb_flush", remote_tlb_flush),
> + VCPU_STAT_GENERIC("halt_poll_success_ns", halt_poll_success_ns),
> + VCPU_STAT_GENERIC("halt_poll_fail_ns", halt_poll_fail_ns),
> + VM_STAT_GENERIC("remote_tlb_flush", remote_tlb_flush),
> { NULL }
> };
>
> diff --git a/arch/s390/include/asm/kvm_host.h b/arch/s390/include/asm/kvm_host.h
> index 8925f3969478..9b4473f76e56 100644
> --- a/arch/s390/include/asm/kvm_host.h
> +++ b/arch/s390/include/asm/kvm_host.h
> @@ -361,6 +361,7 @@ struct sie_page {
> };
>
> struct kvm_vcpu_stat {
> + struct kvm_vcpu_stat_generic generic;
> u64 exit_userspace;
> u64 exit_null;
> u64 exit_external_request;
> @@ -370,13 +371,7 @@ struct kvm_vcpu_stat {
> u64 exit_validity;
> u64 exit_instruction;
> u64 exit_pei;
> - u64 halt_successful_poll;
> - u64 halt_attempted_poll;
> - u64 halt_poll_invalid;
> u64 halt_no_poll_steal;
> - u64 halt_wakeup;
> - u64 halt_poll_success_ns;
> - u64 halt_poll_fail_ns;
> u64 instruction_lctl;
> u64 instruction_lctlg;
> u64 instruction_stctl;
> @@ -755,12 +750,12 @@ struct kvm_vcpu_arch {
> };
>
> struct kvm_vm_stat {
> + struct kvm_vm_stat_generic generic;
> u64 inject_io;
> u64 inject_float_mchk;
> u64 inject_pfault_done;
> u64 inject_service_signal;
> u64 inject_virtio;
> - u64 remote_tlb_flush;
> };
>
> struct kvm_arch_memory_slot {
> diff --git a/arch/s390/kvm/kvm-s390.c b/arch/s390/kvm/kvm-s390.c
> index 1296fc10f80c..e8bc7cd06794 100644
> --- a/arch/s390/kvm/kvm-s390.c
> +++ b/arch/s390/kvm/kvm-s390.c
> @@ -72,13 +72,13 @@ struct kvm_stats_debugfs_item debugfs_entries[] = {
> VCPU_STAT("exit_program_interruption", exit_program_interruption),
> VCPU_STAT("exit_instr_and_program_int", exit_instr_and_program),
> VCPU_STAT("exit_operation_exception", exit_operation_exception),
> - VCPU_STAT("halt_successful_poll", halt_successful_poll),
> - VCPU_STAT("halt_attempted_poll", halt_attempted_poll),
> - VCPU_STAT("halt_poll_invalid", halt_poll_invalid),
> + VCPU_STAT_GENERIC("halt_successful_poll", halt_successful_poll),
> + VCPU_STAT_GENERIC("halt_attempted_poll", halt_attempted_poll),
> + VCPU_STAT_GENERIC("halt_poll_invalid", halt_poll_invalid),
> VCPU_STAT("halt_no_poll_steal", halt_no_poll_steal),
> - VCPU_STAT("halt_wakeup", halt_wakeup),
> - VCPU_STAT("halt_poll_success_ns", halt_poll_success_ns),
> - VCPU_STAT("halt_poll_fail_ns", halt_poll_fail_ns),
> + VCPU_STAT_GENERIC("halt_wakeup", halt_wakeup),
> + VCPU_STAT_GENERIC("halt_poll_success_ns", halt_poll_success_ns),
> + VCPU_STAT_GENERIC("halt_poll_fail_ns", halt_poll_fail_ns),
> VCPU_STAT("instruction_lctlg", instruction_lctlg),
> VCPU_STAT("instruction_lctl", instruction_lctl),
> VCPU_STAT("instruction_stctl", instruction_stctl),
> diff --git a/arch/x86/include/asm/kvm_host.h b/arch/x86/include/asm/kvm_host.h
> index 55efbacfc244..db8eb3dead7e 100644
> --- a/arch/x86/include/asm/kvm_host.h
> +++ b/arch/x86/include/asm/kvm_host.h
> @@ -1127,6 +1127,7 @@ struct kvm_arch {
> };
>
> struct kvm_vm_stat {
> + struct kvm_vm_stat_generic generic;
> ulong mmu_shadow_zapped;
> ulong mmu_pte_write;
> ulong mmu_pde_zapped;
> @@ -1134,13 +1135,13 @@ struct kvm_vm_stat {
> ulong mmu_recycled;
> ulong mmu_cache_miss;
> ulong mmu_unsync;
> - ulong remote_tlb_flush;
> ulong lpages;
> ulong nx_lpage_splits;
> ulong max_mmu_page_hash_collisions;
> };
>
> struct kvm_vcpu_stat {
> + struct kvm_vcpu_stat_generic generic;
> u64 pf_fixed;
> u64 pf_guest;
> u64 tlb_flush;
> @@ -1154,10 +1155,6 @@ struct kvm_vcpu_stat {
> u64 nmi_window_exits;
> u64 l1d_flush;
> u64 halt_exits;
> - u64 halt_successful_poll;
> - u64 halt_attempted_poll;
> - u64 halt_poll_invalid;
> - u64 halt_wakeup;
> u64 request_irq_exits;
> u64 irq_exits;
> u64 host_state_reload;
> @@ -1168,8 +1165,6 @@ struct kvm_vcpu_stat {
> u64 irq_injections;
> u64 nmi_injections;
> u64 req_event;
> - u64 halt_poll_success_ns;
> - u64 halt_poll_fail_ns;
> u64 nested_run;
> u64 directed_yield_attempted;
> u64 directed_yield_successful;
> diff --git a/arch/x86/kvm/x86.c b/arch/x86/kvm/x86.c
> index 9b6bca616929..96d10253218a 100644
> --- a/arch/x86/kvm/x86.c
> +++ b/arch/x86/kvm/x86.c
> @@ -226,10 +226,10 @@ struct kvm_stats_debugfs_item debugfs_entries[] = {
> VCPU_STAT("irq_window", irq_window_exits),
> VCPU_STAT("nmi_window", nmi_window_exits),
> VCPU_STAT("halt_exits", halt_exits),
> - VCPU_STAT("halt_successful_poll", halt_successful_poll),
> - VCPU_STAT("halt_attempted_poll", halt_attempted_poll),
> - VCPU_STAT("halt_poll_invalid", halt_poll_invalid),
> - VCPU_STAT("halt_wakeup", halt_wakeup),
> + VCPU_STAT_GENERIC("halt_successful_poll", halt_successful_poll),
> + VCPU_STAT_GENERIC("halt_attempted_poll", halt_attempted_poll),
> + VCPU_STAT_GENERIC("halt_poll_invalid", halt_poll_invalid),
> + VCPU_STAT_GENERIC("halt_wakeup", halt_wakeup),
> VCPU_STAT("hypercalls", hypercalls),
> VCPU_STAT("request_irq", request_irq_exits),
> VCPU_STAT("irq_exits", irq_exits),
> @@ -241,8 +241,8 @@ struct kvm_stats_debugfs_item debugfs_entries[] = {
> VCPU_STAT("nmi_injections", nmi_injections),
> VCPU_STAT("req_event", req_event),
> VCPU_STAT("l1d_flush", l1d_flush),
> - VCPU_STAT("halt_poll_success_ns", halt_poll_success_ns),
> - VCPU_STAT("halt_poll_fail_ns", halt_poll_fail_ns),
> + VCPU_STAT_GENERIC("halt_poll_success_ns", halt_poll_success_ns),
> + VCPU_STAT_GENERIC("halt_poll_fail_ns", halt_poll_fail_ns),
> VCPU_STAT("nested_run", nested_run),
> VCPU_STAT("directed_yield_attempted", directed_yield_attempted),
> VCPU_STAT("directed_yield_successful", directed_yield_successful),
> @@ -253,7 +253,7 @@ struct kvm_stats_debugfs_item debugfs_entries[] = {
> VM_STAT("mmu_recycled", mmu_recycled),
> VM_STAT("mmu_cache_miss", mmu_cache_miss),
> VM_STAT("mmu_unsync", mmu_unsync),
> - VM_STAT("remote_tlb_flush", remote_tlb_flush),
> + VM_STAT_GENERIC("remote_tlb_flush", remote_tlb_flush),
> VM_STAT("largepages", lpages, .mode = 0444),
> VM_STAT("nx_largepages_splitted", nx_lpage_splits, .mode = 0444),
> VM_STAT("max_mmu_page_hash_collisions", max_mmu_page_hash_collisions),
> diff --git a/include/linux/kvm_host.h b/include/linux/kvm_host.h
> index 2f34487e21f2..1870fa928762 100644
> --- a/include/linux/kvm_host.h
> +++ b/include/linux/kvm_host.h
> @@ -1243,10 +1243,15 @@ struct kvm_stats_debugfs_item {
> #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_GENERIC(n, x, ...) \
> + { n, offsetof(struct kvm, stat.generic.x), KVM_STAT_VM, ## __VA_ARGS__ }
> +#define VCPU_STAT_GENERIC(n, x, ...) \
> + { n, offsetof(struct kvm_vcpu, stat.generic.x), \
> + KVM_STAT_VCPU, ## __VA_ARGS__ }
>
> extern struct kvm_stats_debugfs_item debugfs_entries[];
> extern struct dentry *kvm_debugfs_dir;
> diff --git a/include/linux/kvm_types.h b/include/linux/kvm_types.h
> index a7580f69dda0..7c39489f9953 100644
> --- a/include/linux/kvm_types.h
> +++ b/include/linux/kvm_types.h
> @@ -76,5 +76,17 @@ struct kvm_mmu_memory_cache {
> };
> #endif
>
> +struct kvm_vm_stat_generic {
> + ulong remote_tlb_flush;
> +};
> +
> +struct kvm_vcpu_stat_generic {
> + u64 halt_successful_poll;
> + u64 halt_attempted_poll;
> + u64 halt_poll_invalid;
> + u64 halt_wakeup;
> + u64 halt_poll_success_ns;
> + u64 halt_poll_fail_ns;
> +};
>
> #endif /* __KVM_TYPES_H__ */
> diff --git a/virt/kvm/kvm_main.c b/virt/kvm/kvm_main.c
> index 6b4feb92dc79..f6ad5b080994 100644
> --- a/virt/kvm/kvm_main.c
> +++ b/virt/kvm/kvm_main.c
> @@ -330,7 +330,7 @@ void kvm_flush_remote_tlbs(struct kvm *kvm)
> */
> if (!kvm_arch_flush_remote_tlb(kvm)
> || kvm_make_all_cpus_request(kvm, KVM_REQ_TLB_FLUSH))
> - ++kvm->stat.remote_tlb_flush;
> + ++kvm->stat.generic.remote_tlb_flush;
> cmpxchg(&kvm->tlbs_dirty, dirty_count, 0);
> }
> EXPORT_SYMBOL_GPL(kvm_flush_remote_tlbs);
> @@ -2940,9 +2940,9 @@ static inline void
> update_halt_poll_stats(struct kvm_vcpu *vcpu, u64 poll_ns, bool waited)
> {
> if (waited)
> - vcpu->stat.halt_poll_fail_ns += poll_ns;
> + vcpu->stat.generic.halt_poll_fail_ns += poll_ns;
> else
> - vcpu->stat.halt_poll_success_ns += poll_ns;
> + vcpu->stat.generic.halt_poll_success_ns += poll_ns;
> }
>
> /*
> @@ -2960,16 +2960,16 @@ void kvm_vcpu_block(struct kvm_vcpu *vcpu)
> if (vcpu->halt_poll_ns && !kvm_arch_no_poll(vcpu)) {
> ktime_t stop = ktime_add_ns(ktime_get(), vcpu->halt_poll_ns);
>
> - ++vcpu->stat.halt_attempted_poll;
> + ++vcpu->stat.generic.halt_attempted_poll;
> do {
> /*
> * This sets KVM_REQ_UNHALT if an interrupt
> * arrives.
> */
> if (kvm_vcpu_check_block(vcpu) < 0) {
> - ++vcpu->stat.halt_successful_poll;
> + ++vcpu->stat.generic.halt_successful_poll;
> if (!vcpu_valid_wakeup(vcpu))
> - ++vcpu->stat.halt_poll_invalid;
> + ++vcpu->stat.generic.halt_poll_invalid;
> goto out;
> }
> poll_end = cur = ktime_get();
> @@ -3027,7 +3027,7 @@ bool kvm_vcpu_wake_up(struct kvm_vcpu *vcpu)
> waitp = kvm_arch_vcpu_get_wait(vcpu);
> if (rcuwait_wake_up(waitp)) {
> WRITE_ONCE(vcpu->ready, true);
> - ++vcpu->stat.halt_wakeup;
> + ++vcpu->stat.generic.halt_wakeup;
> return true;
> }
>

Reviewed-by: Krish Sadhukhan <krish.sadhukhan@oracle.com>