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linux/arch/x86/kvm/mmu
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Paolo Bonzini 315f02c60d KVM: x86/mmu: preserve pending TLB flush across calls to kvm_tdp_mmu_zap_sp 
Right now, if a call to kvm_tdp_mmu_zap_sp returns false, the caller
will skip the TLB flush, which is wrong.  There are two ways to fix
it:

- since kvm_tdp_mmu_zap_sp will not yield and therefore will not flush
  the TLB itself, we could change the call to kvm_tdp_mmu_zap_sp to
  use "flush |= ..."

- or we can chain the flush argument through kvm_tdp_mmu_zap_sp down
  to __kvm_tdp_mmu_zap_gfn_range.  Note that kvm_tdp_mmu_zap_sp will
  neither yield nor flush, so flush would never go from true to
  false.

This patch does the former to simplify application to stable kernels,
and to make it further clearer that kvm_tdp_mmu_zap_sp will not flush.

Cc: seanjc@google.com
Fixes: 048f49809c ("KVM: x86/mmu: Ensure TLBs are flushed for TDP MMU during NX zapping")
Cc: <stable@vger.kernel.org> # 5.10.x: 048f49809c: KVM: x86/mmu: Ensure TLBs are flushed for TDP MMU during NX zapping
Cc: <stable@vger.kernel.org> # 5.10.x: 33a3164161: KVM: x86/mmu: Don't allow TDP MMU to yield when recovering NX pages
Cc: <stable@vger.kernel.org>
Reviewed-by: Sean Christopherson <seanjc@google.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2021-04-08 07:48:18 -04:00
..
mmu_audit.c KVM: Stop using deprecated jump label APIs 2021-02-04 05:27:29 -05:00
mmu_internal.h KVM: x86/mmu: Store the address space ID in the TDP iterator 2021-03-16 14:16:34 -04:00
mmu.c KVM: x86/mmu: preserve pending TLB flush across calls to kvm_tdp_mmu_zap_sp 2021-04-08 07:48:18 -04:00
mmutrace.h kvm: x86/mmu: Add TDP MMU SPTE changed trace point 2020-11-19 10:57:16 -05:00
page_track.c KVM: x86/mmu: Use an rwlock for the x86 MMU 2021-02-04 05:27:43 -05:00
paging_tmpl.h KVM: x86/mmu: Consider the hva in mmu_notifier retry 2021-02-22 13:16:53 -05:00
spte.c KVM: x86: use static calls to reduce kvm_x86_ops overhead 2021-02-04 05:27:30 -05:00
spte.h KVM: x86/mmu: Flush TLBs after zap in TDP MMU PF handler 2021-02-04 05:27:44 -05:00
tdp_iter.c KVM: x86/mmu: Store the address space ID in the TDP iterator 2021-03-16 14:16:34 -04:00
tdp_iter.h KVM: x86/mmu: Store the address space ID in the TDP iterator 2021-03-16 14:16:34 -04:00
tdp_mmu.c Merge commit 'kvm-tdp-fix-flushes' into kvm-master 2021-03-31 07:45:41 -04:00
tdp_mmu.h KVM: x86/mmu: Don't allow TDP MMU to yield when recovering NX pages 2021-03-30 13:19:56 -04:00