[PATCH] KVM: switch per-VM stats to u64

[PATCH] KVM: switch per-VM stats to u64

[Paolo Bonzini]

Make them the same type as vCPU stats.  There is no reason
to limit the counters to 64 bits.

Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
---
 arch/arm64/include/asm/kvm_host.h   |  2 +-
 arch/mips/include/asm/kvm_host.h    |  2 +-
 arch/powerpc/include/asm/kvm_host.h |  6 +++---
 arch/x86/include/asm/kvm_host.h     | 22 +++++++++++-----------
 virt/kvm/kvm_main.c                 |  4 ++--
 5 files changed, 18 insertions(+), 18 deletions(-)

diff --git a/arch/arm64/include/asm/kvm_host.h b/arch/arm64/include/asm/kvm_host.h
index 7cd7d5c8c4bc..d56f365b38a8 100644
--- a/arch/arm64/include/asm/kvm_host.h
+++ b/arch/arm64/include/asm/kvm_host.h
@@ -556,7 +556,7 @@ static inline bool __vcpu_write_sys_reg_to_cpu(u64 val, int reg)
 }
 
 struct kvm_vm_stat {
-	ulong remote_tlb_flush;
+	u64 remote_tlb_flush;
 };
 
 struct kvm_vcpu_stat {
diff --git a/arch/mips/include/asm/kvm_host.h b/arch/mips/include/asm/kvm_host.h
index fca4547d580f..4245c082095f 100644
--- a/arch/mips/include/asm/kvm_host.h
+++ b/arch/mips/include/asm/kvm_host.h
@@ -109,7 +109,7 @@ static inline bool kvm_is_error_hva(unsigned long addr)
 }
 
 struct kvm_vm_stat {
-	ulong remote_tlb_flush;
+	u64 remote_tlb_flush;
 };
 
 struct kvm_vcpu_stat {
diff --git a/arch/powerpc/include/asm/kvm_host.h b/arch/powerpc/include/asm/kvm_host.h
index 7f2e90db2050..ae3d4af61b66 100644
--- a/arch/powerpc/include/asm/kvm_host.h
+++ b/arch/powerpc/include/asm/kvm_host.h
@@ -81,9 +81,9 @@ struct kvmppc_book3s_shadow_vcpu;
 struct kvm_nested_guest;
 
 struct kvm_vm_stat {
-	ulong remote_tlb_flush;
-	ulong num_2M_pages;
-	ulong num_1G_pages;
+	u64 remote_tlb_flush;
+	u64 num_2M_pages;
+	u64 num_1G_pages;
 };
 
 struct kvm_vcpu_stat {
diff --git a/arch/x86/include/asm/kvm_host.h b/arch/x86/include/asm/kvm_host.h
index 9bbeb097cadd..94a60998926e 100644
--- a/arch/x86/include/asm/kvm_host.h
+++ b/arch/x86/include/asm/kvm_host.h
@@ -1165,17 +1165,17 @@ struct kvm_arch {
 };
 
 struct kvm_vm_stat {
-	ulong mmu_shadow_zapped;
-	ulong mmu_pte_write;
-	ulong mmu_pde_zapped;
-	ulong mmu_flooded;
-	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;
+	u64 mmu_shadow_zapped;
+	u64 mmu_pte_write;
+	u64 mmu_pde_zapped;
+	u64 mmu_flooded;
+	u64 mmu_recycled;
+	u64 mmu_cache_miss;
+	u64 mmu_unsync;
+	u64 remote_tlb_flush;
+	u64 lpages;
+	u64 nx_lpage_splits;
+	u64 max_mmu_page_hash_collisions;
 };
 
 struct kvm_vcpu_stat {
diff --git a/virt/kvm/kvm_main.c b/virt/kvm/kvm_main.c
index fc35ba0ea5d3..ed4d1581d502 100644
--- a/virt/kvm/kvm_main.c
+++ b/virt/kvm/kvm_main.c
@@ -4833,14 +4833,14 @@ static int kvm_debugfs_release(struct inode *inode, struct file *file)
 
 static int kvm_get_stat_per_vm(struct kvm *kvm, size_t offset, u64 *val)
 {
-	*val = *(ulong *)((void *)kvm + offset);
+	*val = *(u64 *)((void *)kvm + offset);
 
 	return 0;
 }
 
 static int kvm_clear_stat_per_vm(struct kvm *kvm, size_t offset)
 {
-	*(ulong *)((void *)kvm + offset) = 0;
+	*(u64 *)((void *)kvm + offset) = 0;
 
 	return 0;
 }
-- 
2.27.0

Re: [PATCH] KVM: switch per-VM stats to u64

[Sean Christopherson]

On Thu, Jun 10, 2021, Paolo Bonzini wrote:
> Make them the same type as vCPU stats.  There is no reason
> to limit the counters to 64 bits.

s/64/32?  Either that or I'm worse at math than I thought.