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arch: provide OEM strings entry support in SMBIOS

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Signed-off-by: Wei Liu <liuwe@microsoft.com>
This commit is contained in:
Wei Liu 2022-08-04 13:33:46 +00:00 committed by Rob Bradford
parent cb18edb535
commit 964985bb5c
2 changed files with 35 additions and 2 deletions
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3
arch/src/x86_64/mod.rs
View File

@ -826,7 +826,8 @@ pub fn configure_system(
.write_obj((layout::EBDA_START.0 >> 4) as u16, layout::EBDA_POINTER)
.map_err(Error::EbdaSetup)?;
let size = smbios::setup_smbios(guest_mem, serial_number, uuid).map_err(Error::SmbiosSetup)?;
let size =
smbios::setup_smbios(guest_mem, serial_number, uuid, None).map_err(Error::SmbiosSetup)?;
// Place the MP table after the SMIOS table aligned to 16 bytes
let offset = GuestAddress(layout::SMBIOS_START).unchecked_add(size);

34
arch/src/x86_64/smbios.rs
View File

@ -61,6 +61,7 @@ pub type Result<T> = result::Result<T, Error>;
const SM3_MAGIC_IDENT: &[u8; 5usize] = b"_SM3_";
const BIOS_INFORMATION: u8 = 0;
const SYSTEM_INFORMATION: u8 = 1;
const OEM_STRINGS: u8 = 11;
const END_OF_TABLE: u8 = 127;
const PCI_SUPPORTED: u64 = 1 << 7;
const IS_VIRTUAL_MACHINE: u8 = 1 << 4;
@ -125,6 +126,16 @@ pub struct SmbiosSysInfo {
pub family: u8,
}
#[repr(C)]
#[repr(packed)]
#[derive(Default, Copy, Clone)]
struct SmbiosOemStrings {
r#type: u8,
length: u8,
handle: u16,
count: u8,
}
#[repr(C)]
#[repr(packed)]
#[derive(Default, Copy, Clone)]
@ -138,6 +149,7 @@ pub struct SmbiosEndOfTable {
unsafe impl ByteValued for Smbios30Entrypoint {}
unsafe impl ByteValued for SmbiosBiosInfo {}
unsafe impl ByteValued for SmbiosSysInfo {}
unsafe impl ByteValued for SmbiosOemStrings {}
unsafe impl ByteValued for SmbiosEndOfTable {}
fn write_and_incr<T: ByteValued>(
@ -168,6 +180,7 @@ pub fn setup_smbios(
mem: &GuestMemoryMmap,
serial_number: Option<&str>,
uuid: Option<&str>,
oem_strings: Option<&[&str]>,
) -> Result<u64> {
let physptr = GuestAddress(SMBIOS_START)
.checked_add(mem::size_of::<Smbios30Entrypoint>() as u64)
@ -220,6 +233,25 @@ pub fn setup_smbios(
curptr = write_and_incr(mem, 0u8, curptr)?;
}
if let Some(oem_strings) = oem_strings {
handle += 1;
let smbios_oemstrings = SmbiosOemStrings {
r#type: OEM_STRINGS,
length: mem::size_of::<SmbiosOemStrings>() as u8,
handle,
count: oem_strings.len() as u8,
};
curptr = write_and_incr(mem, smbios_oemstrings, curptr)?;
for s in oem_strings {
curptr = write_string(mem, s, curptr)?;
}
curptr = write_and_incr(mem, 0u8, curptr)?;
}
{
handle += 1;
let smbios_end = SmbiosEndOfTable {
@ -280,7 +312,7 @@ mod tests {
fn entrypoint_checksum() {
let mem = GuestMemoryMmap::from_ranges(&[(GuestAddress(SMBIOS_START), 4096)]).unwrap();
setup_smbios(&mem, None, None).unwrap();
setup_smbios(&mem, None, None, None).unwrap();
let smbios_ep: Smbios30Entrypoint = mem.read_obj(GuestAddress(SMBIOS_START)).unwrap();