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vmm: Add PCI segment in IORT table

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Signed-off-by: Michael Zhao <michael.zhao@arm.com>
This commit is contained in:
Michael Zhao 2021-11-17 16:09:34 +08:00 committed by Xin Wang
parent c9374d87ac
commit fad29fdf1a
1 changed files with 41 additions and 24 deletions
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65
vmm/src/acpi.rs
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@ -403,15 +403,21 @@ fn create_spcr_table(base_address: u64, gsi: u32) -> Sdt {
}
#[cfg(target_arch = "aarch64")]
fn create_iort_table() -> Sdt {
fn create_iort_table(pci_segments: &[PciSegment]) -> Sdt {
const ACPI_IORT_NODE_ITS_GROUP: u8 = 0x00;
const ACPI_IORT_NODE_PCI_ROOT_COMPLEX: u8 = 0x02;
const ACPI_IORT_NODE_ROOT_COMPLEX_OFFSET: usize = 72;
const ACPI_IORT_NODE_ROOT_COMPLEX_SIZE: usize = 52;
// IORT
let mut iort = Sdt::new(*b"IORT", 124, 2, *b"CLOUDH", *b"CHIORT ", 1);
// Nodes: PCI Root Complex, ITS
// Note: We currently do not support SMMU
iort.write(36, (2u32).to_le());
// The IORT table containes:
// - Header (size = 40)
// - 1 x ITS Group Node (size = 24)
// - N x Root Complex Node (N = number of pci segments, size = 52 x N)
let iort_table_size: u32 = (ACPI_IORT_NODE_ROOT_COMPLEX_OFFSET
+ ACPI_IORT_NODE_ROOT_COMPLEX_SIZE * pci_segments.len())
as u32;
let mut iort = Sdt::new(*b"IORT", iort_table_size, 2, *b"CLOUDH", *b"CHIORT ", 1);
iort.write(36, ((1 + pci_segments.len()) as u32).to_le());
iort.write(40, (48u32).to_le());
// ITS group node
@ -421,23 +427,34 @@ fn create_iort_table() -> Sdt {
// ITS counts
iort.write(64, (1u32).to_le());
// Root Complex Node
iort.write(72, ACPI_IORT_NODE_PCI_ROOT_COMPLEX as u8);
// Length of the root complex node in bytes
iort.write(73, (52u16).to_le());
// Mapping counts
iort.write(80, (1u32).to_le());
// Offset from the start of the RC node to the start of its Array of ID mappings
iort.write(84, (32u32).to_le());
// Fully coherent device
iort.write(88, (1u32).to_le());
// CCA = CPM = DCAS = 1
iort.write(95, 3u8);
// Identity RID mapping covering the whole input RID range
iort.write(108, (0xffff_u32).to_le());
// id_mapping_array_output_reference should be
// the ITS group node (the first node) if no SMMU
iort.write(116, (48u32).to_le());
// Root Complex Nodes
for (i, segment) in pci_segments.iter().enumerate() {
let node_offset: usize =
ACPI_IORT_NODE_ROOT_COMPLEX_OFFSET + i * ACPI_IORT_NODE_ROOT_COMPLEX_SIZE;
iort.write(node_offset, ACPI_IORT_NODE_PCI_ROOT_COMPLEX as u8);
// Length of the root complex node in bytes
iort.write(
node_offset + 1,
(ACPI_IORT_NODE_ROOT_COMPLEX_SIZE as u16).to_le(),
);
// Revision
iort.write(node_offset + 3, (3u8).to_le());
// Mapping counts
iort.write(node_offset + 8, (1u32).to_le());
// Offset from the start of the RC node to the start of its Array of ID mappings
iort.write(node_offset + 12, (32u32).to_le());
// Fully coherent device
iort.write(node_offset + 16, (1u32).to_le());
// CCA = CPM = DCAS = 1
iort.write(node_offset + 24, 3u8);
// PCI segment number
iort.write(node_offset + 28, (segment.id as u32).to_le());
// Identity RID mapping covering the whole input RID range
iort.write(node_offset + 36, (0xffff_u32).to_le());
// id_mapping_array_output_reference should be
// the ITS group node (the first node) if no SMMU
iort.write(node_offset + 44, (48u32).to_le());
}
iort.update_checksum();
@ -613,7 +630,7 @@ pub fn create_acpi_tables(
#[cfg(target_arch = "aarch64")]
{
let iort = create_iort_table();
let iort = create_iort_table(device_manager.lock().unwrap().pci_segments());
let iort_offset = prev_tbl_off.checked_add(prev_tbl_len).unwrap();
guest_mem
.write_slice(iort.as_slice(), iort_offset)