KVM: s390: Skip gfn/size sanity checks on memslot DELETE or FLAGS_ONLY

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Sanity check the hva, gfn, and size of a userspace memory region only if
any of those properties can change, i.e. skip the checks for DELETE and
FLAGS_ONLY.  KVM doesn't allow moving the hva or changing the size, a gfn
change shows up as a MOVE even if flags are being modified, and the
checks are pointless for the DELETE case as userspace_addr and gfn_base
are zeroed by common KVM.

No functional change intended.

Signed-off-by: Sean Christopherson <seanjc@google.com>
Signed-off-by: Maciej S. Szmigiero <maciej.szmigiero@oracle.com>
Message-Id: <05430738437ac2c9c7371ac4e11f4a533e1677da.1638817640.git.maciej.szmigiero@oracle.com>

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Sean Christopherson 2021-12-06 20:54:21 +01:00 • committed by Paolo Bonzini

parent 77aedf26fe

commit ec5c869766

1 changed files with 9 additions and 4 deletions

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arch/s390/kvm/kvm-s390.c

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