Re: [PATCH v3 26/28] KVM: selftests: Split out helper to allocate guest mem via memfd

David Woodhouse
2022-02-28T23:37:20Z

[-- Attachment #1: Type: text/plain, Size: 760 bytes --]

On Sat, 2022-02-26 at 00:15 +0000, Sean Christopherson wrote:
> Extract the code for allocating guest memory via memfd out of
> vm_userspace_mem_region_add() and into a new helper, kvm_memfd_alloc().
> A future selftest to populate a guest with the maximum amount of guest
> memory will abuse KVM's memslots to alias guest memory regions to a
> single memfd-backed host region, i.e. needs to back a guest with memfd
> memory without a 1:1 association between a memslot and a memfd instance.
>
> No functional change intended.
>
> Signed-off-by: Sean Christopherson <seanjc@google.com>

While we're at it, please can we make the whole thing go away and just
return failure #ifndef MFD_CLOEXEC, instead of breaking the build on
older userspace?

[-- Attachment #2: smime.p7s --]
[-- Type: application/pkcs7-signature, Size: 5965 bytes --]