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David Matlack authored
Change tdp_mmu to a read-only parameter and drop the per-vm tdp_mmu_enabled. For 32-bit KVM, make tdp_mmu_enabled a macro that is always false so that the compiler can continue omitting cals to the TDP MMU. The TDP MMU was introduced in 5.10 and has been enabled by default since 5.15. At this point there are no known functionality gaps between the TDP MMU and the shadow MMU, and the TDP MMU uses less memory and scales better with the number of vCPUs. In other words, there is no good reason to disable the TDP MMU on a live system. Purposely do not drop tdp_mmu=N support (i.e. do not force 64-bit KVM to always use the TDP MMU) since tdp_mmu=N is still used to get test coverage of KVM's shadow MMU TDP support, which is used in 32-bit KVM. Signed-off-by: David Matlack <dmatlack@google.com> Reviewed-by: Kai Huang <kai.huang@intel.com> Signed-off-by: Paolo Bonzini <pbonzini@redhat.com> Message-Id: <20220921173546.2674386-2-dmatlack@google.com> Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
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