diff mbox series

[v4,1/4] KVM: stats: Separate common stats from architecture specific ones

Message ID 20210429203740.1935629-2-jingzhangos@google.com
State New
Headers show
Series KVM statistics data fd-based binary interface | expand

Commit Message

Jing Zhang April 29, 2021, 8:37 p.m. UTC 
Put all common statistics in a separate structure to ease
statistics handling for the incoming new statistics API.

No functional change intended.

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            |  5 +++++
 include/linux/kvm_types.h           | 12 ++++++++++++
 virt/kvm/kvm_main.c                 | 14 +++++++-------
 17 files changed, 80 insertions(+), 88 deletions(-)

Comments

Marc Zyngier April 30, 2021, 12:07 p.m. UTC | #1 
On Thu, 29 Apr 2021 21:37:37 +0100,
Jing Zhang <jingzhangos@google.com> wrote:

> +struct kvm_vm_stat_common {
> +	ulong remote_tlb_flush;
> +};
> +
> +struct kvm_vcpu_stat_common {
> +	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;
> +};

Why can't we make everything a u64? Is there anything that really
needs to be a ulong? On most architectures, they are the same anyway,
so we might as well bite the bullet.

	M.
Jing Zhang April 30, 2021, 3:34 p.m. UTC | #2 
Hi Marc,

On Fri, Apr 30, 2021 at 7:07 AM Marc Zyngier <maz@kernel.org> wrote:
>
> On Thu, 29 Apr 2021 21:37:37 +0100,
> Jing Zhang <jingzhangos@google.com> wrote:
>
> > +struct kvm_vm_stat_common {
> > +     ulong remote_tlb_flush;
> > +};
> > +
> > +struct kvm_vcpu_stat_common {
> > +     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;
> > +};
>
> Why can't we make everything a u64? Is there anything that really
> needs to be a ulong? On most architectures, they are the same anyway,
> so we might as well bite the bullet.
That's a question I have asked myself many times. It is a little bit annoying
to handle different types for VM and VCPU stats.
This divergence was from the  commit 8a7e75d47b681933, which says
"However vm statistics
 could potentially be updated by multiple vcpus from that vm at a time.
 To avoid the overhead of atomics make all vm statistics ulong such that
 they are 64-bit on 64-bit systems where they can be atomically incremented
 and are 32-bit on 32-bit systems which may not be able to atomically
 increment 64-bit numbers."

I would be very happy if there is a lock-free way to use u64 for VM stats.
Please let me know if anyone has any idea about this.
>
>         M.
>
> --
> Without deviation from the norm, progress is not possible.

Thanks,
Jing
diff mbox series

Patch

diff --git a/arch/arm64/include/asm/kvm_host.h b/arch/arm64/include/asm/kvm_host.h
index 7cd7d5c8c4bc..f3ad7a20b0af 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_common common;
 };
 
 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_common common;
 	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..0e41331b0911 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_COM("halt_successful_poll", halt_successful_poll),
+	VCPU_STAT_COM("halt_attempted_poll", halt_attempted_poll),
+	VCPU_STAT_COM("halt_poll_invalid", halt_poll_invalid),
+	VCPU_STAT_COM("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_COM("halt_poll_success_ns", halt_poll_success_ns),
+	VCPU_STAT_COM("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 d0944a75fc8d..1673e5ff42d3 100644
--- a/arch/mips/include/asm/kvm_host.h
+++ b/arch/mips/include/asm/kvm_host.h
@@ -143,10 +143,11 @@  static inline bool kvm_is_error_hva(unsigned long addr)
 }
 
 struct kvm_vm_stat {
-	ulong remote_tlb_flush;
+	struct kvm_vm_stat_common common;
 };
 
 struct kvm_vcpu_stat {
+	struct kvm_vcpu_stat_common common;
 	u64 wait_exits;
 	u64 cache_exits;
 	u64 signal_exits;
@@ -178,12 +179,6 @@  struct kvm_vcpu_stat {
 	u64 vz_cpucfg_exits;
 #endif
 #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 4a22ba70c943..011c59acd606 100644
--- a/arch/mips/kvm/mips.c
+++ b/arch/mips/kvm/mips.c
@@ -71,12 +71,12 @@  struct kvm_stats_debugfs_item debugfs_entries[] = {
 	VCPU_STAT("vz_cpucfg", vz_cpucfg_exits),
 #endif
 #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_COM("halt_successful_poll", halt_successful_poll),
+	VCPU_STAT_COM("halt_attempted_poll", halt_attempted_poll),
+	VCPU_STAT_COM("halt_poll_invalid", halt_poll_invalid),
+	VCPU_STAT_COM("halt_wakeup", halt_wakeup),
+	VCPU_STAT_COM("halt_poll_success_ns", halt_poll_success_ns),
+	VCPU_STAT_COM("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..473d9d0804ff 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_common common;
 	ulong num_2M_pages;
 	ulong num_1G_pages;
 };
 
 struct kvm_vcpu_stat {
+	struct kvm_vcpu_stat_common common;
 	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..bd3a10e1fdaf 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_COM("halt_poll_success_ns", halt_poll_success_ns),
+	VCPU_STAT_COM("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_COM("halt_successful_poll", halt_successful_poll),
+	VCPU_STAT_COM("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_COM("halt_poll_invalid", halt_poll_invalid),
+	VCPU_STAT_COM("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 07682ad4110e..584f214a4a3c 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.common.halt_wakeup;
 
 	cpu = READ_ONCE(vcpu->arch.thread_cpu);
 	if (cpu >= 0 && kvmppc_ipi_thread(cpu))
@@ -3885,7 +3885,7 @@  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.common.halt_attempted_poll;
 
 		vc->vcore_state = VCORE_POLLING;
 		spin_unlock(&vc->lock);
@@ -3902,7 +3902,7 @@  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.common.halt_successful_poll;
 			goto out;
 		}
 	}
@@ -3914,7 +3914,7 @@  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.common.halt_successful_poll;
 		goto out;
 	}
 
@@ -3941,13 +3941,13 @@  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.common.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.common.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..214caa9d9675 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.common.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..9384625c8051 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.common.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..07fdd7a1254a 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_COM("halt_successful_poll", halt_successful_poll),
+	VCPU_STAT_COM("halt_attempted_poll", halt_attempted_poll),
+	VCPU_STAT_COM("halt_poll_invalid", halt_poll_invalid),
+	VCPU_STAT_COM("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_COM("halt_poll_success_ns", halt_poll_success_ns),
+	VCPU_STAT_COM("halt_poll_fail_ns", halt_poll_fail_ns),
+	VM_STAT_COM("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..57a20897f3db 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_common common;
 	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_common common;
 	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..d6bf3372bb10 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_COM("halt_successful_poll", halt_successful_poll),
+	VCPU_STAT_COM("halt_attempted_poll", halt_attempted_poll),
+	VCPU_STAT_COM("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_COM("halt_wakeup", halt_wakeup),
+	VCPU_STAT_COM("halt_poll_success_ns", halt_poll_success_ns),
+	VCPU_STAT_COM("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 3e5fc80a35c8..911fb56b5806 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_common common;
 	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_common common;
 	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 3bf52ba5f2bb..e1207fd8b40d 100644
--- a/arch/x86/kvm/x86.c
+++ b/arch/x86/kvm/x86.c
@@ -229,10 +229,10 @@  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_COM("halt_successful_poll", halt_successful_poll),
+	VCPU_STAT_COM("halt_attempted_poll", halt_attempted_poll),
+	VCPU_STAT_COM("halt_poll_invalid", halt_poll_invalid),
+	VCPU_STAT_COM("halt_wakeup", halt_wakeup),
 	VCPU_STAT("hypercalls", hypercalls),
 	VCPU_STAT("request_irq", request_irq_exits),
 	VCPU_STAT("irq_exits", irq_exits),
@@ -244,8 +244,8 @@  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_COM("halt_poll_success_ns", halt_poll_success_ns),
+	VCPU_STAT_COM("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),
@@ -256,7 +256,7 @@  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_COM("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 a9a7bcf6ebee..9286516094e3 100644
--- a/include/linux/kvm_host.h
+++ b/include/linux/kvm_host.h
@@ -1208,6 +1208,11 @@  struct kvm_stats_debugfs_item {
 	{ n, offsetof(struct kvm, stat.x), KVM_STAT_VM, ## __VA_ARGS__ }
 #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__ }
+#define VCPU_STAT_COM(n, x, ...)					       \
+	{ n, offsetof(struct kvm_vcpu, stat.common.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..87eb05ad678b 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_common {
+	ulong remote_tlb_flush;
+};
+
+struct kvm_vcpu_stat_common {
+	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 9ac70594d133..cdf53fb75ca1 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.common.remote_tlb_flush;
 	cmpxchg(&kvm->tlbs_dirty, dirty_count, 0);
 }
 EXPORT_SYMBOL_GPL(kvm_flush_remote_tlbs);
@@ -2990,9 +2990,9 @@  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.common.halt_poll_fail_ns += poll_ns;
 	else
-		vcpu->stat.halt_poll_success_ns += poll_ns;
+		vcpu->stat.common.halt_poll_success_ns += poll_ns;
 }
 
 /*
@@ -3010,16 +3010,16 @@  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.common.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.common.halt_successful_poll;
 				if (!vcpu_valid_wakeup(vcpu))
-					++vcpu->stat.halt_poll_invalid;
+					++vcpu->stat.common.halt_poll_invalid;
 				goto out;
 			}
 			poll_end = cur = ktime_get();
@@ -3076,7 +3076,7 @@  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.common.halt_wakeup;
 		return true;
 	}