]> git.proxmox.com Git - mirror_ubuntu-kernels.git/commit
KVM: x86/mmu: Topup memory caches after walking GVA->GPA
authorSean Christopherson <sean.j.christopherson@intel.com>
Fri, 3 Jul 2020 02:35:31 +0000 (19:35 -0700)
committerPaolo Bonzini <pbonzini@redhat.com>
Thu, 9 Jul 2020 17:29:39 +0000 (13:29 -0400)
commitf3747a5a9e5a26934da8c956ceef42639cbc623c
tree3ef7a5b0da95d3f69d207f8bebb6cb5d3236acca
parent832914452a9638b713a3ea9a490cbc18f3b164f2
KVM: x86/mmu: Topup memory caches after walking GVA->GPA

Topup memory caches after walking the GVA->GPA translation during a
shadow page fault, there is no need to ensure the caches are full when
walking the GVA.  As of commit f5a1e9f89504f ("KVM: MMU: remove call
to kvm_mmu_pte_write from walk_addr"), the FNAME(walk_addr) flow no
longer add rmaps via kvm_mmu_pte_write().

This avoids allocating memory in the case that the GVA is unmapped in
the guest, and also provides a paper trail of why/when the memory caches
need to be filled.

Reviewed-by: Ben Gardon <bgardon@google.com>
Signed-off-by: Sean Christopherson <sean.j.christopherson@intel.com>
Message-Id: <20200703023545.8771-8-sean.j.christopherson@intel.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
arch/x86/kvm/mmu/paging_tmpl.h