KVM: selftests: Add guest_memfd testcase to fault-in on !mmap()'d memory

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Add a guest_memfd testcase to verify that a vCPU can fault-in guest_memfd
memory that supports mmap(), but that is not currently mapped into host
userspace and/or has a userspace address (in the memslot) that points at
something other than the target guest_memfd range.  Mapping guest_memfd
memory into the guest is supposed to operate completely independently from
any userspace mappings.

Signed-off-by: Sean Christopherson <seanjc@google.com>
Message-ID: <20250729225455.670324-25-seanjc@google.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>

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Sean Christopherson 2025-07-29 15:54:55 -07:00 • committed by Paolo Bonzini

parent a11d7124b4

commit 42188667be

1 changed files with 64 additions and 0 deletions

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tools/testing/selftests/kvm/guest_memfd_test.c

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