KVM: x86/mmu: Avoid memslot lookup in make_spte and mmu_try_to_unsync_pages

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mmu_try_to_unsync_pages checks if page tracking is active for the given
gfn, which requires knowing the memslot. We can pass down the memslot
via make_spte to avoid this lookup.

The memslot is also handy for make_spte's marking of the gfn as dirty:
we can test whether dirty page tracking is enabled, and if so ensure that
pages are mapped as writable with 4K granularity.  Apart from the warning,
no functional change is intended.

Signed-off-by: David Matlack <dmatlack@google.com>
Message-Id: <20210813203504.2742757-7-dmatlack@google.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>

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David Matlack 2021-08-17 08:46:45 -04:00 • committed by Paolo Bonzini

parent 8a9f566ae4

commit 53597858db

8 changed files with 21 additions and 24 deletions

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2

arch/x86/include/asm/kvm_page_track.h

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arch/x86/kvm/mmu/mmu.c

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arch/x86/kvm/mmu/mmu_internal.h

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arch/x86/kvm/mmu/page_track.c

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arch/x86/kvm/mmu/paging_tmpl.h

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arch/x86/kvm/mmu/spte.c

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arch/x86/kvm/mmu/spte.h

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arch/x86/kvm/mmu/tdp_mmu.c

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