# hv_gic_get_msi_region_size(_:) Gets the size in bytes of the generic interrupt controller’s (GIC) message signaled interrupts (MSI) region. ``` func hv_gic_get_msi_region_size(_ msi_region_size: UnsafeMutablePointer) -> hv_return_t ``` ## Parameters `msi_region_size` A pointer to GIC MSI region size that the framework writes to upon success. ## Return Value [`HV_SUCCESS`](/documentation/Hypervisor/HV_SUCCESS) on success; otherwise, an error code. ## Discussion --- Copyright © 2026 Apple Inc. All rights reserved. | [Terms of Use](https://www.apple.com/legal/internet-services/terms/site.html) | [Privacy Policy](https://www.apple.com/privacy/privacy-policy)