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arch: Remove unused wrapper data structure for linux_loader

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The `ByteValued` trait implementations for the data structures from the
'linux_loader' crate are no longer needed, and hence their wrappers can
be removed.

Signed-off-by: Bo Chen <chen.bo@intel.com>
This commit is contained in:
Bo Chen 2024-02-06 15:04:59 -08:00 committed by Rob Bradford
parent c1f4a7b295
commit 9b0b881351
1 changed files with 18 additions and 56 deletions
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74
arch/src/x86_64/mod.rs
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@ -17,14 +17,13 @@ use crate::InitramfsConfig;
use crate::RegionType;
use hypervisor::arch::x86::{CpuIdEntry, CPUID_FLAG_VALID_INDEX};
use hypervisor::{CpuVendor, HypervisorCpuError, HypervisorError};
use linux_loader::loader::bootparam::boot_params;
use linux_loader::loader::elf::start_info::{
hvm_memmap_table_entry, hvm_modlist_entry, hvm_start_info,
};
use std::collections::BTreeMap;
use std::mem;
use vm_memory::{
Address, ByteValued, Bytes, GuestAddress, GuestAddressSpace, GuestMemory, GuestMemoryAtomic,
Address, Bytes, GuestAddress, GuestAddressSpace, GuestMemory, GuestMemoryAtomic,
GuestMemoryRegion, GuestUsize,
};
mod smbios;
@ -116,41 +115,6 @@ impl SgxEpcRegion {
}
}
// This is a workaround to the Rust enforcement specifying that any implementation of a foreign
// trait (in this case `DataInit`) where:
// * the type that is implementing the trait is foreign or
// * all of the parameters being passed to the trait (if there are any) are also foreign
// is prohibited.
#[derive(Copy, Clone, Default)]
struct StartInfoWrapper(hvm_start_info);
#[allow(dead_code)]
#[derive(Copy, Clone, Default)]
struct MemmapTableEntryWrapper(hvm_memmap_table_entry);
#[allow(dead_code)]
#[derive(Copy, Clone, Default)]
struct ModlistEntryWrapper(hvm_modlist_entry);
// SAFETY: data structure only contain a series of integers
unsafe impl ByteValued for StartInfoWrapper {}
// SAFETY: data structure only contain a series of integers
unsafe impl ByteValued for MemmapTableEntryWrapper {}
// SAFETY: data structure only contain a series of integers
unsafe impl ByteValued for ModlistEntryWrapper {}
// This is a workaround to the Rust enforcement specifying that any implementation of a foreign
// trait (in this case `DataInit`) where:
// * the type that is implementing the trait is foreign or
// * all of the parameters being passed to the trait (if there are any) are also foreign
// is prohibited.
#[allow(dead_code)]
#[derive(Copy, Clone, Default)]
struct BootParamsWrapper(boot_params);
// SAFETY: BootParamsWrap is a wrapper over `boot_params` (a series of ints).
unsafe impl ByteValued for BootParamsWrapper {}
pub struct CpuidConfig {
pub sgx_epc_sections: Option<Vec<SgxEpcSection>>,
pub phys_bits: u8,
@ -1081,29 +1045,30 @@ fn configure_pvh(
) -> super::Result<()> {
const XEN_HVM_START_MAGIC_VALUE: u32 = 0x336ec578;
let mut start_info: StartInfoWrapper = StartInfoWrapper(hvm_start_info::default());
start_info.0.magic = XEN_HVM_START_MAGIC_VALUE;
start_info.0.version = 1; // pvh has version 1
start_info.0.nr_modules = 0;
start_info.0.cmdline_paddr = cmdline_addr.raw_value();
start_info.0.memmap_paddr = layout::MEMMAP_START.raw_value();
let mut start_info = hvm_start_info {
magic: XEN_HVM_START_MAGIC_VALUE,
version: 1, // pvh has version 1
nr_modules: 0,
cmdline_paddr: cmdline_addr.raw_value(),
memmap_paddr: layout::MEMMAP_START.raw_value(),
..Default::default()
};
if let Some(rsdp_addr) = rsdp_addr {
start_info.0.rsdp_paddr = rsdp_addr.0;
start_info.rsdp_paddr = rsdp_addr.0;
}
if let Some(initramfs_config) = initramfs {
// The initramfs has been written to guest memory already, here we just need to
// create the module structure that describes it.
let ramdisk_mod: ModlistEntryWrapper = ModlistEntryWrapper(hvm_modlist_entry {
let ramdisk_mod = hvm_modlist_entry {
paddr: initramfs_config.address.raw_value(),
size: initramfs_config.size as u64,
..Default::default()
});
};
start_info.0.nr_modules += 1;
start_info.0.modlist_paddr = layout::MODLIST_START.raw_value();
start_info.nr_modules += 1;
start_info.modlist_paddr = layout::MODLIST_START.raw_value();
// Write the modlist struct to guest memory.
guest_mem
@ -1163,7 +1128,7 @@ fn configure_pvh(
);
}
start_info.0.memmap_entries = memmap.len() as u32;
start_info.memmap_entries = memmap.len() as u32;
// Copy the vector with the memmap table to the MEMMAP_START address
// which is already saved in the memmap_paddr field of hvm_start_info struct.
@ -1172,17 +1137,14 @@ fn configure_pvh(
guest_mem
.checked_offset(
memmap_start_addr,
mem::size_of::<hvm_memmap_table_entry>() * start_info.0.memmap_entries as usize,
mem::size_of::<hvm_memmap_table_entry>() * start_info.memmap_entries as usize,
)
.ok_or(super::Error::MemmapTablePastRamEnd)?;
// For every entry in the memmap vector, create a MemmapTableEntryWrapper
// and write it to guest memory.
// For every entry in the memmap vector, write it to guest memory.
for memmap_entry in memmap {
let map_entry_wrapper: MemmapTableEntryWrapper = MemmapTableEntryWrapper(memmap_entry);
guest_mem
.write_obj(map_entry_wrapper, memmap_start_addr)
.write_obj(memmap_entry, memmap_start_addr)
.map_err(|_| super::Error::MemmapTableSetup)?;
memmap_start_addr =
memmap_start_addr.unchecked_add(mem::size_of::<hvm_memmap_table_entry>() as u64);