diff options
| author | Ben Gardon <bgardon@google.com> | 2021-05-18 10:34:14 -0700 |
|---|---|---|
| committer | Paolo Bonzini <pbonzini@redhat.com> | 2021-06-17 13:09:27 -0400 |
| commit | d501f747ef5c0ac0c917f9a6781d04ae4ae39d63 (patch) | |
| tree | 4e083219aaff30031d8df1fb0463279ba0cba222 /arch/x86/include/asm/kvm_host.h | |
| parent | e2209710ccc5d28d8b88c822d2f3e03b269a2856 (diff) | |
KVM: x86/mmu: Lazily allocate memslot rmaps
If the TDP MMU is in use, wait to allocate the rmaps until the shadow
MMU is actually used. (i.e. a nested VM is launched.) This saves memory
equal to 0.2% of guest memory in cases where the TDP MMU is used and
there are no nested guests involved.
Signed-off-by: Ben Gardon <bgardon@google.com>
Message-Id: <20210518173414.450044-8-bgardon@google.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Diffstat (limited to 'arch/x86/include/asm/kvm_host.h')
| -rw-r--r-- | arch/x86/include/asm/kvm_host.h | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/arch/x86/include/asm/kvm_host.h b/arch/x86/include/asm/kvm_host.h index 11798a9ff3e9..dadb545c429f 100644 --- a/arch/x86/include/asm/kvm_host.h +++ b/arch/x86/include/asm/kvm_host.h @@ -1869,4 +1869,6 @@ static inline int kvm_cpu_get_apicid(int mps_cpu) int kvm_cpu_dirty_log_size(void); +int alloc_all_memslots_rmaps(struct kvm *kvm); + #endif /* _ASM_X86_KVM_HOST_H */ |