Add a helper to account pages used by KVM for page tables in memory
secondary pagetable stats. This function will be used by subsequent
patches in different archs.
Signed-off-by: Yosry Ahmed <yosryahmed@xxxxxxxxxx>
---
include/linux/kvm_host.h | 10 ++++++++++
1 file changed, 10 insertions(+)
diff --git a/include/linux/kvm_host.h b/include/linux/kvm_host.h
index 3b40f8d68fbb1..032821d77e920 100644
--- a/include/linux/kvm_host.h
+++ b/include/linux/kvm_host.h
@@ -2241,6 +2241,16 @@ static inline void kvm_handle_signal_exit(struct kvm_vcpu *vcpu)
}
#endif /* CONFIG_KVM_XFER_TO_GUEST_WORK */
+/*
+ * If more than one page is being (un)accounted, @virt must be the address of
+ * the first page of a block of pages what were allocated together (i.e
+ * accounted together).
+ */
+static inline void kvm_account_pgtable_pages(void *virt, int nr)
+{
+ mod_lruvec_page_state(virt_to_page(virt), NR_SECONDARY_PAGETABLE, nr);
+}
+
/*
* This defines how many reserved entries we want to keep before we
* kick the vcpu to the userspace to avoid dirty ring full. This
--
2.37.0.rc0.161.g10f37bed90-goog
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