f98a69f42e
With this new AddressAllocator as part of the SystemAllocator, the VMM can now decide with finer granularity where to place memory. By allocating the RAM and the hole into the MMIO address space, we ensure that no memory will be allocated by accident where the RAM or where the hole is. And by creating the new MMIO hole address space, we create a subset of the entire MMIO address space where we can place 32 bits BARs for example. Signed-off-by: Sebastien Boeuf <sebastien.boeuf@intel.com>
64 lines
1.7 KiB
Rust
64 lines
1.7 KiB
Rust
// Copyright 2018 Amazon.com, Inc. or its affiliates. All Rights Reserved.
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// SPDX-License-Identifier: Apache-2.0
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#![allow(
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clippy::unreadable_literal,
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clippy::const_static_lifetime,
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clippy::cast_lossless,
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clippy::transmute_ptr_to_ptr,
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clippy::cast_ptr_alignment
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)]
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extern crate byteorder;
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extern crate kvm_bindings;
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extern crate libc;
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extern crate arch_gen;
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extern crate kvm_ioctls;
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extern crate linux_loader;
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extern crate vm_memory;
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use std::result;
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use vm_memory::GuestAddress;
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#[derive(Debug, PartialEq)]
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pub enum Error {
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#[cfg(target_arch = "x86_64")]
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/// X86_64 specific error triggered during system configuration.
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X86_64Setup(x86_64::Error),
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/// The zero page extends past the end of guest_mem.
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ZeroPagePastRamEnd,
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/// Error writing the zero page of guest memory.
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ZeroPageSetup,
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}
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pub type Result<T> = result::Result<T, Error>;
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#[derive(PartialEq)]
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pub enum RegionType {
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/// RAM type
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Ram,
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/// Reserved type. Designate a region which should not be considered as
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/// RAM. Useful to specify a PCI hole for instance.
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Reserved,
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}
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// 1MB. We don't put anything above here except the kernel itself.
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pub const HIMEM_START: GuestAddress = GuestAddress(0x100000);
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#[cfg(target_arch = "aarch64")]
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pub mod aarch64;
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#[cfg(target_arch = "aarch64")]
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pub use aarch64::{
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arch_memory_regions, configure_system, get_reserved_mem_addr, layout::CMDLINE_MAX_SIZE,
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layout::CMDLINE_START,
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};
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#[cfg(target_arch = "x86_64")]
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pub mod x86_64;
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#[cfg(target_arch = "x86_64")]
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pub use x86_64::{
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arch_memory_regions, configure_system, get_32bit_gap_start as get_reserved_mem_addr,
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layout::CMDLINE_MAX_SIZE, layout::CMDLINE_START,
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};
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