[PATCH V2 03/10] KVM: Remove tlbs_dirty

Lai Jiangshan
2021-09-18T00:56:55Z

There is no user of tlbs_dirty.

Signed-off-by: Lai Jiangshan <laijs@linux.alibaba.com>
---
include/linux/kvm_host.h | 1 -
virt/kvm/kvm_main.c | 9 +--------
2 files changed, 1 insertion(+), 9 deletions(-)

diff --git a/include/linux/kvm_host.h b/include/linux/kvm_host.h
index e4d712e9f760..3b7846cd0637 100644
--- a/include/linux/kvm_host.h
+++ b/include/linux/kvm_host.h
@@ -608,7 +608,6 @@ struct kvm {
unsigned long mmu_notifier_range_start;
unsigned long mmu_notifier_range_end;
#endif
- long tlbs_dirty;
struct list_head devices;
u64 manual_dirty_log_protect;
struct dentry *debugfs_dentry;
diff --git a/virt/kvm/kvm_main.c b/virt/kvm/kvm_main.c
index 3e67c93ca403..6d6be42ec78d 100644
--- a/virt/kvm/kvm_main.c
+++ b/virt/kvm/kvm_main.c
@@ -312,12 +312,6 @@ EXPORT_SYMBOL_GPL(kvm_make_all_cpus_request);
#ifndef CONFIG_HAVE_KVM_ARCH_TLB_FLUSH_ALL
void kvm_flush_remote_tlbs(struct kvm *kvm)
{
- /*
- * Read tlbs_dirty before setting KVM_REQ_TLB_FLUSH in
- * kvm_make_all_cpus_request.
- */
- long dirty_count = smp_load_acquire(&kvm->tlbs_dirty);
-
/*
* We want to publish modifications to the page tables before reading
* mode. Pairs with a memory barrier in arch-specific code.
@@ -332,7 +326,6 @@ 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.generic.remote_tlb_flush;
- cmpxchg(&kvm->tlbs_dirty, dirty_count, 0);
}
EXPORT_SYMBOL_GPL(kvm_flush_remote_tlbs);
#endif
@@ -537,7 +530,7 @@ static __always_inline int __kvm_handle_hva_range(struct kvm *kvm,
}
}

- if (range->flush_on_ret && (ret || kvm->tlbs_dirty))
+ if (range->flush_on_ret && ret)
kvm_flush_remote_tlbs(kvm);

if (locked)
--
2.19.1.6.gb485710b