KVM: x86/mmu: Make TDP MMU root refcount atomic

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In order to parallelize more operations for the TDP MMU, make the
refcount on TDP MMU roots atomic, so that a future patch can allow
multiple threads to take a reference on the root concurrently, while
holding the MMU lock in read mode.

Signed-off-by: Ben Gardon <bgardon@google.com>
Message-Id: <20210401233736.638171-7-bgardon@google.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>

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Ben Gardon 2021-04-01 16:37:29 -07:00 • committed by Paolo Bonzini

parent cfc109979b

commit 11cccf5c04

3 changed files with 14 additions and 6 deletions

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6

arch/x86/kvm/mmu/mmu_internal.h

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4

arch/x86/kvm/mmu/tdp_mmu.c

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10

arch/x86/kvm/mmu/tdp_mmu.h

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