Re: [PATCH v6 1/4] KVM: stats: Separate common stats from architecture specific ones

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On 5/24/21 8:18 AM, Jing Zhang wrote:
Put all common statistics in a separate structure to ease
statistics handling for the incoming new statistics API.

No functional change intended.

Reviewed-by: David Matlack <dmatlack@xxxxxxxxxx>
Reviewed-by: Ricardo Koller <ricarkol@xxxxxxxxxx>
Signed-off-by: Jing Zhang <jingzhangos@xxxxxxxxxx>
---
  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..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 fca4547d580f..6f610fbcd8d1 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_common common;
  };
struct kvm_vcpu_stat {
+	struct kvm_vcpu_stat_common common;
  	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..f4fc60c05e9c 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_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 28a80d240b76..58e187e03c52 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))
@@ -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.common.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.common.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.common.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.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 55efbacfc244..5bfd6893fbf6 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 9b6bca616929..9a93d80caff6 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_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),
@@ -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_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),
@@ -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_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 2f34487e21f2..97700e41db3b 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_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 {


Should this be named as 'kvm_vm_stat_generic' by following the convention in kvm_main.c ?  For example, kvm_vm_ioctl_enable_cap()  vs.  kvm_vm_ioctl_enable_cap_generic().

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


Same comment as above.

+	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..34a4cf265297 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);
@@ -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.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;
  }
/*
@@ -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.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();
@@ -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.common.halt_wakeup;
  		return true;
  	}



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