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| author | Paolo Bonzini <pbonzini@redhat.com> | 2021-02-06 09:53:33 -0500 |
|---|---|---|
| committer | Paolo Bonzini <pbonzini@redhat.com> | 2021-02-08 14:49:01 -0500 |
| commit | 897218ff7cf19290ec2d69652ce673d8ed6fedeb (patch) | |
| tree | e2901b8ab7865dc22205fdd57c173f72279aad19 /arch/x86/kvm/Makefile | |
| parent | e36b250e502a6145fa95a3d93af83ba66fc6ae1b (diff) | |
| download | lwn-897218ff7cf19290ec2d69652ce673d8ed6fedeb.tar.gz lwn-897218ff7cf19290ec2d69652ce673d8ed6fedeb.zip | |
KVM: x86: compile out TDP MMU on 32-bit systems
The TDP MMU assumes that it can do atomic accesses to 64-bit PTEs.
Rather than just disabling it, compile it out completely so that it
is possible to use for example 64-bit xchg.
To limit the number of stubs, wrap all accesses to tdp_mmu_enabled
or tdp_mmu_page with a function. Calls to all other functions in
tdp_mmu.c are eliminated and do not even reach the linker.
Reviewed-by: Sean Christopherson <seanjc@google.com>
Tested-by: Sean Christopherson <seanjc@google.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Diffstat (limited to 'arch/x86/kvm/Makefile')
| -rw-r--r-- | arch/x86/kvm/Makefile | 3 |
1 files changed, 2 insertions, 1 deletions
diff --git a/arch/x86/kvm/Makefile b/arch/x86/kvm/Makefile index a50041235530..aeab168c5711 100644 --- a/arch/x86/kvm/Makefile +++ b/arch/x86/kvm/Makefile @@ -17,7 +17,8 @@ kvm-$(CONFIG_KVM_ASYNC_PF) += $(KVM)/async_pf.o kvm-y += x86.o emulate.o i8259.o irq.o lapic.o xen.o \ i8254.o ioapic.o irq_comm.o cpuid.o pmu.o mtrr.o \ hyperv.o debugfs.o mmu/mmu.o mmu/page_track.o \ - mmu/spte.o mmu/tdp_iter.o mmu/tdp_mmu.o + mmu/spte.o +kvm-$(CONFIG_X86_64) += mmu/tdp_iter.o mmu/tdp_mmu.o kvm-intel-y += vmx/vmx.o vmx/vmenter.o vmx/pmu_intel.o vmx/vmcs12.o \ vmx/evmcs.o vmx/nested.o vmx/posted_intr.o |