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arch: x86_64: Refactor the way to generate e820 RAM maps

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This patch defines a new function 'generate_ram_ranges', to generate
usable physical memory ranges for the guest based on the existing guest
memory managed by VMM. This function is also made public, so that it can
be reused, say by the IGVM loader in the future [1].

No functional change.

See: #6020

Signed-off-by: Bo Chen <chen.bo@intel.com>
This commit is contained in:
Bo Chen
2023-12-12 10:23:28 -08:00
committed by Bo Chen
parent 5e2f218832
commit 38a2808d85
2 changed files with 127 additions and 89 deletions
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5
arch/src/lib.rs
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@@ -91,8 +91,9 @@ pub mod x86_64;
#[cfg(target_arch = "x86_64")]
pub use x86_64::{
arch_memory_regions, configure_system, configure_vcpu, generate_common_cpuid,
get_host_cpu_phys_bits, initramfs_load_addr, layout, layout::CMDLINE_MAX_SIZE,
layout::CMDLINE_START, regs, CpuidConfig, CpuidFeatureEntry, EntryPoint, _NSIG,
generate_ram_ranges, get_host_cpu_phys_bits, initramfs_load_addr, layout,
layout::CMDLINE_MAX_SIZE, layout::CMDLINE_START, regs, CpuidConfig, CpuidFeatureEntry,
EntryPoint, _NSIG,
};
/// Safe wrapper for `sysconf(_SC_PAGESIZE)`.