diff options
| author | Michael Roth <michael.roth@amd.com> | 2023-12-30 11:23:21 -0600 |
|---|---|---|
| committer | Paolo Bonzini <pbonzini@redhat.com> | 2024-05-10 13:11:48 -0400 |
| commit | a90764f0e4ed5350cc9caeb384e0fb356c032587 (patch) | |
| tree | 937a1302c4b4ebdcccca9c1a52e40916e7ecb05e /virt/kvm/Kconfig | |
| parent | 1f6c06b177513e8a47c43e95d1985dbd9cff3ddd (diff) | |
KVM: guest_memfd: Add hook for invalidating memory
In some cases, like with SEV-SNP, guest memory needs to be updated in a
platform-specific manner before it can be safely freed back to the host.
Wire up arch-defined hooks to the .free_folio kvm_gmem_aops callback to
allow for special handling of this sort when freeing memory in response
to FALLOC_FL_PUNCH_HOLE operations and when releasing the inode, and go
ahead and define an arch-specific hook for x86 since it will be needed
for handling memory used for SEV-SNP guests.
Signed-off-by: Michael Roth <michael.roth@amd.com>
Message-Id: <20231230172351.574091-6-michael.roth@amd.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Diffstat (limited to 'virt/kvm/Kconfig')
| -rw-r--r-- | virt/kvm/Kconfig | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/virt/kvm/Kconfig b/virt/kvm/Kconfig index ca870157b2ed..754c6c923427 100644 --- a/virt/kvm/Kconfig +++ b/virt/kvm/Kconfig @@ -113,3 +113,7 @@ config KVM_GENERIC_PRIVATE_MEM config HAVE_KVM_GMEM_PREPARE bool depends on KVM_PRIVATE_MEM + +config HAVE_KVM_GMEM_INVALIDATE + bool + depends on KVM_PRIVATE_MEM |