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arch: Mark the PCI MMCONFIG region as reserved in the E820 tables

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The PCI Express Firmware specification says that the region may
be included in the E820 tables (but it must always be in the ACPI
tables.)

Signed-off-by: Rob Bradford <robert.bradford@intel.com>
This commit is contained in:
Rob Bradford 2019-09-30 16:46:21 +01:00
parent 6a4a931b9e
commit 9356af80c6
1 changed files with 8 additions and 0 deletions
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8
arch/src/x86_64/mod.rs
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@ -22,6 +22,7 @@ use vm_memory::{
};
const E820_RAM: u32 = 1;
const E820_RESERVED: u32 = 2;
// This is a workaround to the Rust enforcement specifying that any implementation of a foreign
// trait (in this case `DataInit`) where:
@ -162,6 +163,13 @@ pub fn configure_system(
}
}
add_e820_entry(
&mut params.0,
layout::PCI_MMCONFIG_START.0,
layout::PCI_MMCONFIG_SIZE,
E820_RESERVED,
)?;
#[cfg(feature = "acpi")]
{
let start_of_device_area = if mem_end < layout::MEM_32BIT_RESERVED_START {