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envelope-from=pbonzini@redhat.com; helo=us-smtp-delivery-124.mimecast.com X-Spam_score_int: -24 X-Spam_score: -2.5 X-Spam_bar: -- X-Spam_report: (-2.5 / 5.0 requ) BAYES_00=-1.9, DKIMWL_WL_HIGH=-0.445, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, DKIM_VALID_EF=-0.1, RCVD_IN_DNSWL_NONE=-0.0001, RCVD_IN_MSPIKE_H4=0.001, RCVD_IN_MSPIKE_WL=0.001, RCVD_IN_VALIDITY_RPBL_BLOCKED=0.001, RCVD_IN_VALIDITY_SAFE_BLOCKED=0.001, SPF_HELO_PASS=-0.001, SPF_PASS=-0.001 autolearn=ham autolearn_force=no X-Spam_action: no action X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org Sender: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org This is most likely desirable, and is the easiest way to migrate a bit-sized value without peeking at the innards of the bilge crate. Signed-off-by: Paolo Bonzini --- rust/migration/src/vmstate.rs | 19 +++++++++++++++++++ 1 file changed, 19 insertions(+) diff --git a/rust/migration/src/vmstate.rs b/rust/migration/src/vmstate.rs index 2a29aff7cd6..c95f8ece776 100644 --- a/rust/migration/src/vmstate.rs +++ b/rust/migration/src/vmstate.rs @@ -295,6 +295,25 @@ unsafe impl $crate::vmstate::VMState for $type { as ::bilge::prelude::Number>::UnderlyingType as $crate::vmstate::VMState>::VARRAY_FLAG; } + + impl $crate::migratable::ToMigrationState for $type { + type Migrated = <<$type as ::bilge::prelude::Bitsized>::ArbitraryInt + as ::bilge::prelude::Number>::UnderlyingType; + + fn snapshot_migration_state(&self, target: &mut Self::Migrated) -> Result<(), $crate::InvalidError> { + *target = Self::Migrated::from(*self); + Ok(()) + } + + fn restore_migrated_state_mut( + &mut self, + source: Self::Migrated, + version_id: u8, + ) -> Result<(), $crate::InvalidError> { + *self = Self::from(source); + Ok(()) + } + } }; } -- 2.51.0