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vmm: Populate MCFG table with details of all PCI segments

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The MCFG table holds the PCI MMIO config details for all the MMIO PCI
config devices.

Signed-off-by: Rob Bradford <robert.bradford@intel.com>
This commit is contained in:
Rob Bradford
2021-10-05 15:06:55 +01:00
parent c886d71d29
commit 080ce9b068
3 changed files with 19 additions and 12 deletions
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vmm/src/acpi.rs
+12 -10
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@@ -222,20 +222,22 @@ fn create_facp_table(dsdt_offset: GuestAddress) -> Sdt {
facp
}
fn create_mcfg_table() -> Sdt {
fn create_mcfg_table(device_manager: &Arc<Mutex<DeviceManager>>) -> Sdt {
let mut mcfg = Sdt::new(*b"MCFG", 36, 1, *b"CLOUDH", *b"CHMCFG ", 1);
// MCFG reserved 8 bytes
mcfg.append(0u64);
// 32-bit PCI enhanced configuration mechanism
mcfg.append(PciRangeEntry {
base_address: arch::layout::PCI_MMCONFIG_START.0,
segment: 0,
start: 0,
end: 0,
..Default::default()
});
for segment in device_manager.lock().unwrap().pci_segments() {
// 32-bit PCI enhanced configuration mechanism
mcfg.append(PciRangeEntry {
base_address: segment.mmio_config_address,
segment: segment.id,
start: 0,
end: 0,
..Default::default()
});
}
mcfg
}
@@ -536,7 +538,7 @@ pub fn create_acpi_tables(
}
// MCFG
let mcfg = create_mcfg_table();
let mcfg = create_mcfg_table(device_manager);
let mcfg_offset = prev_tbl_off.checked_add(prev_tbl_len).unwrap();
guest_mem
.write_slice(mcfg.as_slice(), mcfg_offset)