KVM: x86/mmu: Move "huge page disallowed" calculation into mapping helpers

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Calculate huge_page_disallowed in __direct_map() and FNAME(fetch) in
preparation for reworking the calculation so that it preserves the
requested map level and eventually to avoid flagging a shadow page as
being disallowed for being used as a large/huge page when it couldn't
have been huge in the first place, e.g. because the backing page in the
host is not large.

Pass the error code into the helpers and use it to recalcuate exec and
write_fault instead adding yet more booleans to the parameters.

Opportunistically use huge_page_disallowed instead of lpage_disallowed
to match the nomenclature used within the mapping helpers (though even
they have existing inconsistencies).

No functional change intended.

Signed-off-by: Sean Christopherson <sean.j.christopherson@intel.com>
Message-Id: <20200923183735.584-4-sean.j.christopherson@intel.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>

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This commit is contained in:

Sean Christopherson 2020-09-23 11:37:30 -07:00 • committed by Paolo Bonzini

parent 7d919c7a38

commit 6c2fd34f5c

2 changed files with 26 additions and 20 deletions

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22

arch/x86/kvm/mmu/mmu.c

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24

arch/x86/kvm/mmu/paging_tmpl.h

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