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| author |   David Matlack <dmatlack@google.com> | 2021-09-24 05:05:26 -0400 |
|---|---|---|
| committer |   Paolo Bonzini <pbonzini@redhat.com> | 2021-10-01 03:44:53 -0400 |
| commit | e710c5f6be0eb36f8f2e98efbc02f1b31021c29d (patch) | |
| tree | 73f624c5ff275ba2a777cf7f7723e93d292d933a /arch/x86/kvm/mmu.h | |
| parent | KVM: MMU: unify tdp_mmu_map_set_spte_atomic and tdp_mmu_set_spte_atomic_no_dirty_log (diff) | |
| download | linux-dev-e710c5f6be0eb36f8f2e98efbc02f1b31021c29d.tar.xz linux-dev-e710c5f6be0eb36f8f2e98efbc02f1b31021c29d.zip | |
KVM: x86/mmu: Pass the memslot around via struct kvm_page_fault
The memslot for the faulting gfn is used throughout the page fault
handling code, so capture it in kvm_page_fault as soon as we know the
gfn and use it in the page fault handling code that has direct access
to the kvm_page_fault struct. Replace various tests using is_noslot_pfn
with more direct tests on fault->slot being NULL.
This, in combination with the subsequent patch, improves "Populate
memory time" in dirty_log_perf_test by 5% when using the legacy MMU.
There is no discerable improvement to the performance of the TDP MMU.
No functional change intended.
Suggested-by: Ben Gardon <bgardon@google.com>
Signed-off-by: David Matlack <dmatlack@google.com>
Message-Id: <20210813203504.2742757-4-dmatlack@google.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Diffstat (limited to 'arch/x86/kvm/mmu.h')
| -rw-r--r-- | arch/x86/kvm/mmu.h | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/arch/x86/kvm/mmu.h b/arch/x86/kvm/mmu.h index 01a4d1bc5053..75367af1a6d3 100644 --- a/arch/x86/kvm/mmu.h +++ b/arch/x86/kvm/mmu.h @@ -158,6 +158,9 @@ struct kvm_page_fault { /* Shifted addr, or result of guest page table walk if addr is a gva. */ gfn_t gfn; + /* The memslot containing gfn. May be NULL. */ + struct kvm_memory_slot *slot; + /* Outputs of kvm_faultin_pfn. */ kvm_pfn_t pfn; hva_t hva; |