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authorBen Gardon <bgardon@google.com>2021-02-02 21:57:24 +0300
committerPaolo Bonzini <pbonzini@redhat.com>2021-02-04 13:27:43 +0300
commit531810caa9f4bc99ffbb90e09256792c56a6b07a (patch)
tree2f8d7a33fea95476a3181b4f1aca2e1f973a4295 /include/linux/kvm_host.h
parentf3d4b4b1dc1c5fb9ea17cac14133463bfe72f170 (diff)
downloadlinux-531810caa9f4bc99ffbb90e09256792c56a6b07a.tar.xz
KVM: x86/mmu: Use an rwlock for the x86 MMU
Add a read / write lock to be used in place of the MMU spinlock on x86. The rwlock will enable the TDP MMU to handle page faults, and other operations in parallel in future commits. Reviewed-by: Peter Feiner <pfeiner@google.com> Signed-off-by: Ben Gardon <bgardon@google.com> Message-Id: <20210202185734.1680553-19-bgardon@google.com> [Introduce virt/kvm/mmu_lock.h - Paolo] Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Diffstat (limited to 'include/linux/kvm_host.h')
-rw-r--r--include/linux/kvm_host.h5
1 files changed, 5 insertions, 0 deletions
diff --git a/include/linux/kvm_host.h b/include/linux/kvm_host.h
index f3b1013fb22c..f417447129b9 100644
--- a/include/linux/kvm_host.h
+++ b/include/linux/kvm_host.h
@@ -451,7 +451,12 @@ struct kvm_memslots {
};
struct kvm {
+#ifdef KVM_HAVE_MMU_RWLOCK
+ rwlock_t mmu_lock;
+#else
spinlock_t mmu_lock;
+#endif /* KVM_HAVE_MMU_RWLOCK */
+
struct mutex slots_lock;
struct mm_struct *mm; /* userspace tied to this vm */
struct kvm_memslots __rcu *memslots[KVM_ADDRESS_SPACE_NUM];