mirror of
https://github.com/cloud-hypervisor/cloud-hypervisor.git
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1ba2b34019
The old implementation used an ever monotonically increasing u32 counter to allocate new GSIs. The counter increased every time a new GSI was allocated, and freeing GSIs was not possible. Thus, Cloud Hypervisor can run out of GSIs and panics. This currently happened at the 1024th GSI [0]. Further, this caused the `KVM_SET_GSI_ROUTING` ioctl to carry much more payload than needed. This new implementation uses a bitmap for proper tracking of resources and can gracefully free GSIs - this is abstracted in type InterruptAllocator. Please note that this commit only replaces the old mechanism. The next commit will introduce freeing used GSIs automatically when an InterruptRoute is dropped. While being on this, we also propagate the errors that the allocator may throw where necessary. Co-authored-by: Sebastian Eydam <sebastian.eydam@cyberus-technology.de> On-behalf-of: SAP sebastian.eydam@sap.com Signed-off-by: Sebastian Eydam <sebastian.eydam@cyberus-technology.de> On-behalf-of: Philipp Schuster@sap.com Signed-off-by: Philipp Schuster <philipp.schuster@cyberus-technology.de>
26 lines
809 B
Rust
26 lines
809 B
Rust
// Copyright 2018 The Chromium OS Authors. All rights reserved.
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// Copyright © 2019 Intel Corporation
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//
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// Portions Copyright 2017 The Chromium OS Authors. All rights reserved.
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// Use of this source code is governed by a BSD-style license that can be
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// found in the LICENSE-BSD-3-Clause file.
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//
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// SPDX-License-Identifier: Apache-2.0 AND BSD-3-Clause
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#![deny(missing_docs)]
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//! Manages system resources that can be allocated to VMs and their devices.
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mod address;
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mod gsi;
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/// page size related utility functions
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pub mod page_size;
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mod system;
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pub use crate::address::AddressAllocator;
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#[cfg(target_arch = "x86_64")]
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pub use crate::gsi::GsiApic;
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pub use crate::gsi::{GsiAllocator, InterruptAllocError};
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pub use crate::system::SystemAllocator;
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mod memory_slot;
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pub use memory_slot::MemorySlotAllocator;
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