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pvh is gone for now

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This commit is contained in:
Alex Zenla 2024-06-13 10:42:42 +00:00
parent 4e9850293f
commit bc95ae491b
No known key found for this signature in database
GPG Key ID: 067B238899B51269
4 changed files with 3 additions and 30688 deletions
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4
crates/xen/xenclient/examples/boot.rs
View File

@ -1,7 +1,7 @@
use std::{env, process};
use tokio::fs;
use xenclient::error::Result;
use xenclient::x86pvh::X86PvhPlatform;
use xenclient::x86pv::X86PvPlatform;
use xenclient::{DomainConfig, XenClient};
#[tokio::main]
@ -15,7 +15,7 @@ async fn main() -> Result<()> {
}
let kernel_image_path = args.get(1).expect("argument not specified");
let initrd_path = args.get(2).expect("argument not specified");
let client = XenClient::new(0, X86PvhPlatform::new()).await?;
let client = XenClient::new(0, X86PvPlatform::new()).await?;
let config = DomainConfig {
backend_domid: 0,
name: "xenclient-test".to_string(),

4
crates/xen/xenclient/src/lib.rs
View File

@ -27,9 +27,7 @@ use xenstore::{
};
pub mod pci;
mod x86acpi;
pub mod x86pv;
pub mod x86pvh;
#[derive(Clone)]
pub struct XenClient<P: BootSetupPlatform> {
@ -318,7 +316,7 @@ impl<P: BootSetupPlatform> XenClient<P> {
.await?;
tx.write_string(format!("{}/domid", dom_path).as_str(), &domid.to_string())
.await?;
tx.write_string(format!("{}/type", dom_path).as_str(), "PVH")
tx.write_string(format!("{}/type", dom_path).as_str(), "PV")
.await?;
tx.write_string(
format!("{}/store/port", dom_path).as_str(),

29731
crates/xen/xenclient/src/x86acpi.rs
View File

File diff suppressed because it is too large Load Diff

952
crates/xen/xenclient/src/x86pvh.rs
View File

@ -1,952 +0,0 @@
use std::{
mem::{size_of, MaybeUninit},
ptr::{addr_of, addr_of_mut},
slice,
};
use libc::{c_void, malloc, munmap};
use nix::errno::Errno;
use xencall::sys::{
ArchDomainConfig, CreateDomain, E820Entry, E820_ACPI, E820_RAM, E820_RESERVED,
MEMFLAGS_POPULATE_ON_DEMAND, XEN_DOMCTL_CDF_HAP, XEN_DOMCTL_CDF_HVM_GUEST,
XEN_DOMCTL_CDF_IOMMU, XEN_X86_EMU_LAPIC,
};
use crate::{
boot::{BootDomain, BootSetupPlatform, DomainSegment},
error::{Error, Result},
sys::{
GrantEntry, HVM_PARAM_ALTP2M, HVM_PARAM_BUFIOREQ_PFN, HVM_PARAM_CONSOLE_EVTCHN,
HVM_PARAM_CONSOLE_PFN, HVM_PARAM_IDENT_PT, HVM_PARAM_IOREQ_PFN, HVM_PARAM_MONITOR_RING_PFN,
HVM_PARAM_PAGING_RING_PFN, HVM_PARAM_SHARING_RING_PFN, HVM_PARAM_STORE_EVTCHN,
HVM_PARAM_STORE_PFN, HVM_PARAM_TIMER_MODE, XEN_HVM_START_MAGIC_VALUE, XEN_PAGE_SHIFT,
},
x86acpi::{acpi_build_tables, acpi_config, acpi_ctxt, acpi_mem_ops, dsdt_pvh, hvm_info_table},
};
const X86_PAGE_SHIFT: u64 = 12;
const X86_PAGE_SIZE: u64 = 1 << X86_PAGE_SHIFT;
#[repr(C)]
#[derive(Default, Copy, Clone, Debug)]
pub struct HvmStartInfo {
pub magic: u32,
pub version: u32,
pub flags: u32,
pub nr_modules: u32,
pub modlist_paddr: u64,
pub cmdline_paddr: u64,
pub rsdp_paddr: u64,
pub memmap_paddr: u64,
pub memmap_entries: u32,
pub reserved: u32,
}
const HVM_START_MAX_CMDLINE_SIZE: usize = 1024;
const HVM_START_MAX_MEMMAP_ENTRIES: usize = 8;
const HVM_START_MAX_MODLIST_COUNT: usize = 8;
#[repr(C)]
#[derive(Default, Copy, Clone, Debug)]
pub struct HvmModlistEntry {
pub paddr: u64,
pub size: u64,
pub cmdline_paddr: u64,
pub reserved: u64,
}
#[repr(C)]
#[derive(Default, Copy, Clone, Debug)]
pub struct HvmMemmapTableEntry {
pub addr: u64,
pub size: u64,
pub typ: u32,
pub reserved: u32,
}
#[repr(C)]
#[derive(Copy, Clone, Debug)]
struct HvmSaveDescriptor {
pub typecode: u16,
pub instance: u16,
pub length: u32,
}
#[repr(C)]
#[derive(Default, Copy, Clone, Debug)]
struct HvmSaveHeader {
magic: u32,
version: u32,
changeset: u64,
cpuid: u32,
gtsc_khz: u32,
}
#[repr(C)]
#[derive(Copy, Clone, Debug)]
struct HvmCpu {
pub fpu_regs: [u8; 512],
pub rax: u64,
pub rbx: u64,
pub rcx: u64,
pub rdx: u64,
pub rbp: u64,
pub rsi: u64,
pub rdi: u64,
pub rsp: u64,
pub r8: u64,
pub r9: u64,
pub r10: u64,
pub r11: u64,
pub r12: u64,
pub r13: u64,
pub r14: u64,
pub r15: u64,
pub rip: u64,
pub rflags: u64,
pub cr0: u64,
pub cr2: u64,
pub cr3: u64,
pub cr4: u64,
pub dr0: u64,
pub dr1: u64,
pub dr2: u64,
pub dr3: u64,
pub dr6: u64,
pub dr7: u64,
pub cs_sel: u32,
pub ds_sel: u32,
pub es_sel: u32,
pub fs_sel: u32,
pub gs_sel: u32,
pub ss_sel: u32,
pub tr_sel: u32,
pub ldtr_sel: u32,
pub cs_limit: u32,
pub ds_limit: u32,
pub es_limit: u32,
pub fs_limit: u32,
pub gs_limit: u32,
pub ss_limit: u32,
pub tr_limit: u32,
pub ldtr_limit: u32,
pub idtr_limit: u32,
pub gdtr_limit: u32,
pub cs_base: u64,
pub ds_base: u64,
pub es_base: u64,
pub fs_base: u64,
pub gs_base: u64,
pub ss_base: u64,
pub tr_base: u64,
pub ldtr_base: u64,
pub idtr_base: u64,
pub gdtr_base: u64,
pub cs_arbytes: u32,
pub ds_arbytes: u32,
pub es_arbytes: u32,
pub fs_arbytes: u32,
pub gs_arbytes: u32,
pub ss_arbytes: u32,
pub tr_arbytes: u32,
pub ldtr_arbytes: u32,
pub sysenter_cs: u64,
pub sysenter_esp: u64,
pub sysenter_eip: u64,
pub shadow_gs: u64,
pub msr_flags: u64,
pub msr_lstar: u64,
pub msr_star: u64,
pub msr_cstar: u64,
pub msr_syscall_mask: u64,
pub msr_efer: u64,
pub msr_tsc_aux: u64,
pub tsc: u64,
pub pending_event: u32,
pub error_code: u32,
pub flags: u32,
pub pad0: u32,
}
#[repr(C)]
#[derive(Copy, Clone, Debug)]
struct HvmEnd {}
#[repr(C)]
#[derive(Copy, Clone, Debug)]
struct BspCtx {
header_d: HvmSaveDescriptor,
header: HvmSaveHeader,
cpu_d: HvmSaveDescriptor,
cpu: HvmCpu,
end_d: HvmSaveDescriptor,
end: HvmEnd,
}
#[repr(C)]
#[derive(Copy, Clone, Debug)]
struct HvmMtrr {
msr_pat_cr: u64,
msr_mtrr_var: [u64; 16],
msr_mtrr_fixed: [u64; 11],
msr_mtrr_cap: u64,
msr_mtrr_def_type: u64,
}
#[repr(C)]
#[derive(Copy, Clone, Debug)]
struct MtrrCtx {
header_d: HvmSaveDescriptor,
header: HvmSaveHeader,
mtrr_d: HvmSaveDescriptor,
mtrr: HvmMtrr,
end_d: HvmSaveDescriptor,
end: HvmEnd,
}
#[derive(Debug)]
struct VmemRange {
start: u64,
end: u64,
_flags: u32,
_nid: u32,
}
#[derive(Debug, Clone)]
struct AcpiModule {
data: u64,
length: u32,
guest_addr: u64,
}
#[derive(Default, Clone)]
pub struct X86PvhPlatform {
start_info_segment: Option<DomainSegment>,
lowmem_end: u64,
highmem_end: u64,
mmio_start: u64,
acpi_modules: Vec<AcpiModule>,
}
const X86_CR0_PE: u64 = 0x01;
const X86_CR0_ET: u64 = 0x10;
impl X86PvhPlatform {
pub fn new() -> Self {
Self {
..Default::default()
}
}
pub fn construct_memmap(&self) -> Result<Vec<E820Entry>> {
let mut entries = Vec::new();
let highmem_size = if self.highmem_end > 0 {
self.highmem_end - (1u64 << 32)
} else {
0
};
let lowmem_start = 0u64;
entries.push(E820Entry {
addr: lowmem_start,
size: self.lowmem_end - lowmem_start,
typ: E820_RAM,
});
entries.push(E820Entry {
addr: (X86_HVM_END_SPECIAL_REGION - X86_HVM_NR_SPECIAL_PAGES) << XEN_PAGE_SHIFT,
size: X86_HVM_NR_SPECIAL_PAGES << XEN_PAGE_SHIFT,
typ: E820_RESERVED,
});
for module in &self.acpi_modules {
entries.push(E820Entry {
addr: module.guest_addr & !(self.page_size() - 1),
size: module.length as u64 + (module.guest_addr & (self.page_size() - 1)),
typ: E820_ACPI,
});
}
if highmem_size > 0 {
entries.push(E820Entry {
addr: 1u64 << 32,
size: highmem_size,
typ: E820_RAM,
});
}
Ok(entries)
}
unsafe fn get_save_record<T: Sized>(ctx: &mut [u8], typ: u16, instance: u16) -> *mut T {
let mut ptr = ctx.as_mut_ptr();
loop {
let sd = ptr as *mut HvmSaveDescriptor;
if (*sd).typecode == 0 {
break;
}
if (*sd).typecode == typ && (*sd).instance == instance {
return ptr.add(size_of::<HvmSaveDescriptor>()) as *mut T;
}
ptr = ptr
.add(size_of::<HvmSaveDescriptor>())
.add((*sd).length as usize);
}
std::ptr::null_mut()
}
const PAGE_PRESENT: u32 = 0x001;
const PAGE_RW: u32 = 0x002;
const PAGE_USER: u32 = 0x004;
const PAGE_ACCESSED: u32 = 0x020;
const PAGE_DIRTY: u32 = 0x040;
const PAGE_PSE: u32 = 0x080;
}
#[async_trait::async_trait]
impl BootSetupPlatform for X86PvhPlatform {
fn create_domain(&self) -> CreateDomain {
CreateDomain {
flags: XEN_DOMCTL_CDF_HVM_GUEST | XEN_DOMCTL_CDF_HAP | XEN_DOMCTL_CDF_IOMMU,
arch_domain_config: ArchDomainConfig {
emulation_flags: XEN_X86_EMU_LAPIC,
..Default::default()
},
..Default::default()
}
}
fn page_size(&self) -> u64 {
X86_PAGE_SIZE
}
fn page_shift(&self) -> u64 {
X86_PAGE_SHIFT
}
fn needs_early_kernel(&self) -> bool {
false
}
fn hvm(&self) -> bool {
true
}
async fn initialize_early(&mut self, domain: &mut BootDomain) -> Result<()> {
{
let mut config: acpi_config = unsafe { MaybeUninit::zeroed().assume_init() };
let mut hvminfo: Vec<hvm_info_table> =
vec![unsafe { MaybeUninit::zeroed().assume_init() }; 1];
config.hvminfo = hvminfo.as_ptr();
let h = hvminfo.get_mut(0).unwrap();
h.nr_vcpus = domain.max_vcpus;
for i in 0..domain.max_vcpus {
h.vcpu_online[(i / 8) as usize] |= 1 << (i & 7);
}
config.lapic_base_address = LAPIC_BASE_ADDRESS as u32;
config.lapic_id = Some(acpi_lapic_id);
config.acpi_revision = 5;
unsafe {
config.dsdt_15cpu = addr_of!(dsdt_pvh) as *mut u8;
config.dsdt_15cpu_len = dsdt_pvh.len() as u32;
config.dsdt_anycpu = addr_of!(dsdt_pvh) as *mut u8;
config.dsdt_anycpu_len = dsdt_pvh.len() as u32;
};
unsafe {
config.rsdp = malloc(self.page_size() as usize) as u64;
config.infop = malloc(self.page_size() as usize) as u64;
let buf = malloc((8 * self.page_size()) as usize);
let mut ctx = AcpiBuildContext {
page_size: self.page_size(),
page_shift: self.page_shift(),
buf: buf as *mut u8,
guest_start: ACPI_INFO_PHYSICAL_ADDRESS + self.page_size(),
guest_curr: ACPI_INFO_PHYSICAL_ADDRESS + self.page_size(),
guest_end: ACPI_INFO_PHYSICAL_ADDRESS
+ self.page_size()
+ (8 * self.page_size()),
};
let mut ctxt = acpi_ctxt {
ptr: addr_of_mut!(ctx) as *mut c_void,
mem_ops: acpi_mem_ops {
alloc: Some(acpi_mem_alloc),
free: Some(acpi_mem_free),
v2p: Some(acpi_v2p),
},
};
if acpi_build_tables(addr_of_mut!(ctxt), addr_of_mut!(config)) > 0 {
return Err(Error::GenericError("acpi_build_tables failed".to_string()));
}
let acpi_pages_num = (align_it(ctx.guest_curr, self.page_size()) - ctx.guest_start)
>> self.page_shift();
self.acpi_modules.push(AcpiModule {
data: config.rsdp,
length: 64,
guest_addr: ACPI_INFO_PHYSICAL_ADDRESS
+ (1 + acpi_pages_num) * self.page_size(),
});
self.acpi_modules.push(AcpiModule {
data: config.infop,
length: 4096,
guest_addr: ACPI_INFO_PHYSICAL_ADDRESS,
});
self.acpi_modules.push(AcpiModule {
data: ctx.buf as u64,
length: (acpi_pages_num << self.page_shift()) as u32,
guest_addr: ACPI_INFO_PHYSICAL_ADDRESS + self.page_size(),
});
}
}
{
for module in &self.acpi_modules {
let num_pages = ((module.length as u64
+ (module.guest_addr & !(!(self.page_size() - 1))))
+ (self.page_size() - 1))
>> self.page_shift();
let base = module.guest_addr >> self.page_shift();
for i in 0..num_pages {
let e = base + i;
if domain
.call
.populate_physmap(domain.domid, 1, 0, 0, &[e])
.await
.unwrap_or(Vec::new())
.len()
== 1
{
continue;
}
let idx = self.lowmem_end;
self.lowmem_end -= 1;
domain.call.add_to_physmap(domain.domid, 2, idx, e).await?;
}
let ptr = domain
.phys
.map_foreign_pages(base, num_pages << self.page_shift())
.await? as *mut u8;
let dst = unsafe { std::slice::from_raw_parts_mut(ptr, module.length as usize) };
let src = unsafe {
std::slice::from_raw_parts(module.data as *mut u8, module.length as usize)
};
slice_copy::copy(dst, src);
}
}
let mut memory_start =
(X86_HVM_END_SPECIAL_REGION - X86_HVM_NR_SPECIAL_PAGES) << self.page_shift();
memory_start = memory_start.min(LAPIC_BASE_ADDRESS);
memory_start = memory_start.min(ACPI_INFO_PHYSICAL_ADDRESS);
let mmio_size = (4 * 1024 * 1024 * 1024) - memory_start;
let mut lowmem_end = domain.total_pages << self.page_shift();
let mut highmem_end = 0u64;
let mmio_start = (1u64 << 32) - mmio_size;
if lowmem_end > mmio_start {
highmem_end = (1 << 32) + (lowmem_end - mmio_start);
lowmem_end = mmio_start;
}
self.lowmem_end = lowmem_end;
self.highmem_end = highmem_end;
self.mmio_start = mmio_start;
domain
.call
.set_hvm_param(domain.domid, HVM_PARAM_TIMER_MODE, 1)
.await?;
domain
.call
.set_hvm_param(domain.domid, HVM_PARAM_ALTP2M, 0)
.await?;
domain
.call
.set_paging_mempool_size(domain.domid, 1024 << 12)
.await?;
let memmap = self.construct_memmap()?;
domain
.call
.set_memory_map(domain.domid, memmap.clone())
.await?;
Ok(())
}
async fn initialize_memory(&mut self, domain: &mut BootDomain) -> Result<()> {
domain
.call
.claim_pages(domain.domid, domain.total_pages)
.await?;
let memflags = if domain.target_pages > domain.total_pages {
MEMFLAGS_POPULATE_ON_DEMAND
} else {
0
};
let mut vmemranges: Vec<VmemRange> = Vec::new();
vmemranges.push(VmemRange {
start: 0,
end: self.lowmem_end,
_flags: 0,
_nid: 0,
});
if self.highmem_end > (1u64 << 32) {
vmemranges.push(VmemRange {
start: 1u64 << 32,
end: self.highmem_end,
_flags: 0,
_nid: 0,
});
}
let mut p2m_size: u64 = 0;
let mut total: u64 = 0;
for range in &vmemranges {
total += (range.end - range.start) >> XEN_PAGE_SHIFT;
p2m_size = p2m_size.max(range.end >> XEN_PAGE_SHIFT);
}
if total != domain.total_pages {
return Err(Error::MemorySetupFailed("total pages mismatch"));
}
for range in &vmemranges {
let end_pages = range.end >> self.page_shift();
let mut cur_pages = range.start >> self.page_shift();
while end_pages > cur_pages {
let count = end_pages - cur_pages;
if count != 0 {
let mut extents = vec![0u64; count as usize];
for i in 0..count {
extents[i as usize] = cur_pages + i;
}
let _ = domain
.call
.populate_physmap(domain.domid, count, 0_u32, memflags, &extents)
.await?;
cur_pages += count;
}
}
}
domain.call.claim_pages(domain.domid, 0).await?;
Ok(())
}
async fn alloc_p2m_segment(&mut self, _: &mut BootDomain) -> Result<Option<DomainSegment>> {
Ok(None)
}
async fn alloc_page_tables(&mut self, _: &mut BootDomain) -> Result<Option<DomainSegment>> {
Ok(None)
}
async fn setup_page_tables(&mut self, _: &mut BootDomain) -> Result<()> {
Ok(())
}
async fn setup_hypercall_page(&mut self, _: &mut BootDomain) -> Result<()> {
Ok(())
}
async fn alloc_magic_pages(&mut self, domain: &mut BootDomain) -> Result<()> {
let mut special_array = vec![0u64; X86_HVM_NR_SPECIAL_PAGES as usize];
for i in 0..X86_HVM_NR_SPECIAL_PAGES {
special_array[i as usize] = special_pfn(i as u32);
}
domain
.call
.populate_physmap(
domain.domid,
special_array.len() as u64,
0,
0,
&special_array,
)
.await?;
domain
.phys
.clear_pages(special_pfn(0), special_array.len() as u64)
.await?;
domain
.call
.set_hvm_param(
domain.domid,
HVM_PARAM_STORE_PFN,
special_pfn(SPECIALPAGE_XENSTORE),
)
.await?;
domain
.call
.set_hvm_param(
domain.domid,
HVM_PARAM_BUFIOREQ_PFN,
special_pfn(SPECIALPAGE_BUFIOREQ),
)
.await?;
domain
.call
.set_hvm_param(
domain.domid,
HVM_PARAM_IOREQ_PFN,
special_pfn(SPECIALPAGE_IOREQ),
)
.await?;
domain
.call
.set_hvm_param(
domain.domid,
HVM_PARAM_CONSOLE_PFN,
special_pfn(SPECIALPAGE_CONSOLE),
)
.await?;
domain
.call
.set_hvm_param(
domain.domid,
HVM_PARAM_PAGING_RING_PFN,
special_pfn(SPECIALPAGE_PAGING),
)
.await?;
domain
.call
.set_hvm_param(
domain.domid,
HVM_PARAM_MONITOR_RING_PFN,
special_pfn(SPECIALPAGE_ACCESS),
)
.await?;
domain
.call
.set_hvm_param(
domain.domid,
HVM_PARAM_SHARING_RING_PFN,
special_pfn(SPECIALPAGE_SHARING),
)
.await?;
if domain.cmdline.chars().count() > HVM_START_MAX_CMDLINE_SIZE - 1 {
return Err(Error::GenericError("kernel cmdline too large".to_string()));
}
let mut start_info_size = size_of::<HvmStartInfo>();
start_info_size += HVM_START_MAX_CMDLINE_SIZE;
start_info_size += size_of::<HvmMemmapTableEntry>() * HVM_START_MAX_MEMMAP_ENTRIES;
start_info_size += size_of::<HvmModlistEntry>() * HVM_START_MAX_MODLIST_COUNT;
start_info_size += 1;
self.start_info_segment = Some(domain.alloc_segment(0, start_info_size as u64).await?);
let pt = domain
.phys
.map_foreign_pages(special_pfn(SPECIALPAGE_IDENT_PT), self.page_size())
.await? as *mut u32;
for i in 0..(self.page_size() / size_of::<u32>() as u64) {
unsafe {
*(pt.offset(i as isize)) = ((i as u32) << 22)
| X86PvhPlatform::PAGE_PRESENT
| X86PvhPlatform::PAGE_RW
| X86PvhPlatform::PAGE_USER
| X86PvhPlatform::PAGE_ACCESSED
| X86PvhPlatform::PAGE_DIRTY
| X86PvhPlatform::PAGE_PSE;
}
}
domain
.call
.set_hvm_param(
domain.domid,
HVM_PARAM_IDENT_PT,
special_pfn(SPECIALPAGE_IDENT_PT),
)
.await?;
let evtchn = domain.call.evtchn_alloc_unbound(domain.domid, 0).await?;
domain
.consoles
.push((evtchn, special_pfn(SPECIALPAGE_CONSOLE)));
domain
.phys
.clear_pages(special_pfn(SPECIALPAGE_CONSOLE), 1)
.await?;
domain.store_mfn = special_pfn(SPECIALPAGE_XENSTORE);
domain
.phys
.clear_pages(special_pfn(SPECIALPAGE_XENSTORE), 1)
.await?;
Ok(())
}
async fn setup_shared_info(&mut self, _: &mut BootDomain, _: u64) -> Result<()> {
Ok(())
}
async fn setup_start_info(&mut self, domain: &mut BootDomain, _: u64) -> Result<()> {
let memmap = self.construct_memmap()?;
let start_info_segment = self
.start_info_segment
.as_ref()
.ok_or_else(|| Error::GenericError("start_info_segment missing".to_string()))?;
let ptr = domain
.phys
.pfn_to_ptr(start_info_segment.pfn, start_info_segment.pages)
.await?;
let byte_slice = unsafe {
slice::from_raw_parts_mut(
ptr as *mut u8,
(self.page_size() * start_info_segment.pages) as usize,
)
};
byte_slice.fill(0);
let info = ptr as *mut HvmStartInfo;
unsafe {
(*info).magic = XEN_HVM_START_MAGIC_VALUE;
(*info).version = 1;
(*info).cmdline_paddr =
(start_info_segment.pfn << self.page_shift()) + size_of::<HvmStartInfo>() as u64;
(*info).memmap_paddr = (start_info_segment.pfn << self.page_shift())
+ size_of::<HvmStartInfo>() as u64
+ HVM_START_MAX_CMDLINE_SIZE as u64;
(*info).memmap_entries = memmap.len() as u32;
(*info).rsdp_paddr = self.acpi_modules[0].guest_addr;
(*info).nr_modules = 1;
(*info).modlist_paddr = (start_info_segment.pfn << self.page_shift())
+ (size_of::<HvmStartInfo>()
+ HVM_START_MAX_CMDLINE_SIZE
+ (size_of::<HvmMemmapTableEntry>() * HVM_START_MAX_MEMMAP_ENTRIES))
as u64;
};
let cmdline_ptr = (ptr + size_of::<HvmStartInfo>() as u64) as *mut u8;
for (i, c) in domain.cmdline.chars().enumerate() {
unsafe { *cmdline_ptr.add(i) = c as u8 };
}
let entries = (ptr + size_of::<HvmStartInfo>() as u64 + HVM_START_MAX_CMDLINE_SIZE as u64)
as *mut HvmMemmapTableEntry;
let entries = unsafe { std::slice::from_raw_parts_mut(entries, memmap.len()) };
for (i, e820) in memmap.iter().enumerate() {
let entry = &mut entries[i];
entry.addr = e820.addr;
entry.size = e820.size;
entry.typ = e820.typ;
entry.reserved = 0;
}
let modlist = (ptr
+ (size_of::<HvmStartInfo>()
+ HVM_START_MAX_CMDLINE_SIZE
+ (size_of::<HvmMemmapTableEntry>() * HVM_START_MAX_MEMMAP_ENTRIES))
as u64) as *mut HvmModlistEntry;
let modlist_cmdline_paddr = (start_info_segment.pfn << self.page_shift())
+ (size_of::<HvmStartInfo>()
+ HVM_START_MAX_CMDLINE_SIZE
+ (size_of::<HvmMemmapTableEntry>() * HVM_START_MAX_MEMMAP_ENTRIES)
+ (size_of::<HvmModlistEntry>() * HVM_START_MAX_MODLIST_COUNT))
as u64;
unsafe {
(*modlist).paddr = domain.initrd_segment.pfn << self.page_shift();
(*modlist).size = domain.initrd_segment.size;
(*modlist).cmdline_paddr = modlist_cmdline_paddr as u64;
}
Ok(())
}
async fn bootlate(&mut self, domain: &mut BootDomain) -> Result<()> {
domain
.call
.set_hvm_param(
domain.domid,
HVM_PARAM_STORE_EVTCHN,
domain.store_evtchn as u64,
)
.await?;
domain
.call
.set_hvm_param(
domain.domid,
HVM_PARAM_CONSOLE_EVTCHN,
domain.consoles[0].0 as u64,
)
.await?;
Ok(())
}
async fn vcpu(&mut self, domain: &mut BootDomain) -> Result<()> {
let size = domain.call.get_hvm_context(domain.domid, None).await?;
let mut full_context = vec![0u8; size as usize];
domain
.call
.get_hvm_context(domain.domid, Some(&mut full_context))
.await?;
let mut ctx: BspCtx = unsafe { MaybeUninit::zeroed().assume_init() };
unsafe {
std::ptr::copy(
full_context.as_ptr(),
addr_of_mut!(ctx) as *mut u8,
size_of::<HvmSaveDescriptor>() + size_of::<HvmSaveHeader>(),
)
};
let start_info_segment = self
.start_info_segment
.as_ref()
.ok_or_else(|| Error::GenericError("start_info_segment missing".to_string()))?;
ctx.cpu_d.typecode = 2;
ctx.cpu_d.instance = 0;
ctx.cpu_d.length = size_of::<HvmCpu>() as u32;
ctx.cpu.cs_base = 0;
ctx.cpu.ds_base = 0;
ctx.cpu.es_base = 0;
ctx.cpu.ss_base = 0;
ctx.cpu.tr_base = 0;
ctx.cpu.cs_limit = !0;
ctx.cpu.ds_limit = !0;
ctx.cpu.es_limit = !0;
ctx.cpu.ss_limit = !0;
ctx.cpu.tr_limit = 0x67;
ctx.cpu.cs_arbytes = 0xc9b;
ctx.cpu.ds_arbytes = 0xc93;
ctx.cpu.es_arbytes = 0xc93;
ctx.cpu.ss_arbytes = 0xc93;
ctx.cpu.tr_arbytes = 0x8b;
ctx.cpu.cr0 = X86_CR0_PE | X86_CR0_ET;
ctx.cpu.rip = domain.image_info.virt_entry;
ctx.cpu.rbx = start_info_segment.pfn << self.page_shift();
ctx.cpu.dr6 = 0xffff0ff0;
ctx.cpu.dr7 = 0x00000400;
ctx.end_d.typecode = 0;
ctx.end_d.instance = 0;
ctx.end_d.length = 0;
unsafe {
let existing = X86PvhPlatform::get_save_record::<HvmMtrr>(&mut full_context, 14, 0);
if existing.is_null() {
return Err(Error::GenericError("mtrr record not found".to_string()));
}
let mut mtrr: MtrrCtx = MaybeUninit::zeroed().assume_init();
mtrr.header_d = ctx.header_d;
mtrr.header = ctx.header;
mtrr.mtrr_d.typecode = 14;
mtrr.mtrr_d.instance = 0;
mtrr.mtrr_d.length = size_of::<HvmMtrr>() as u32;
mtrr.mtrr = *existing;
mtrr.mtrr.msr_mtrr_def_type = 6u64 | (1u64 << 11);
mtrr.end_d.typecode = 0;
mtrr.end_d.instance = 0;
mtrr.end_d.length = 0;
for i in 0..domain.max_vcpus {
mtrr.mtrr_d.instance = i as u16;
domain
.call
.set_hvm_context(
domain.domid,
std::slice::from_raw_parts_mut(
addr_of_mut!(mtrr) as *mut u8,
size_of::<MtrrCtx>(),
),
)
.await?;
}
};
let addr = addr_of_mut!(ctx) as *mut u8;
let slice = unsafe { std::slice::from_raw_parts_mut(addr, size_of::<BspCtx>()) };
domain.call.set_hvm_context(domain.domid, slice).await?;
Ok(())
}
async fn gnttab_seed(&mut self, domain: &mut BootDomain) -> Result<()> {
let console_gfn = domain.consoles.first().map(|x| x.1).unwrap_or(0) as usize;
let addr = domain
.call
.mmap(0, 1 << XEN_PAGE_SHIFT)
.await
.ok_or(Error::MmapFailed)?;
domain
.call
.map_resource(domain.domid, 1, 0, 0, 1, addr)
.await?;
let entries = unsafe { slice::from_raw_parts_mut(addr as *mut GrantEntry, 2) };
entries[0].flags = 1 << 0;
entries[0].domid = 0;
entries[0].frame = console_gfn as u32;
entries[1].flags = 1 << 0;
entries[1].domid = 0;
entries[1].frame = domain.store_mfn as u32;
unsafe {
let result = munmap(addr as *mut c_void, 1 << XEN_PAGE_SHIFT);
if result != 0 {
return Err(Error::UnmapFailed(Errno::from_raw(result)));
}
}
Ok(())
}
}
fn special_pfn(x: u32) -> u64 {
(X86_HVM_END_SPECIAL_REGION - X86_HVM_NR_SPECIAL_PAGES) + (x as u64)
}
const X86_HVM_NR_SPECIAL_PAGES: u64 = 8;
const X86_HVM_END_SPECIAL_REGION: u64 = 0xff000;
const SPECIALPAGE_PAGING: u32 = 0;
const SPECIALPAGE_ACCESS: u32 = 1;
const SPECIALPAGE_SHARING: u32 = 2;
const SPECIALPAGE_BUFIOREQ: u32 = 3;
const SPECIALPAGE_XENSTORE: u32 = 4;
const SPECIALPAGE_IOREQ: u32 = 5;
const SPECIALPAGE_IDENT_PT: u32 = 6;
const SPECIALPAGE_CONSOLE: u32 = 7;
const LAPIC_BASE_ADDRESS: u64 = 0xfee00000;
const ACPI_INFO_PHYSICAL_ADDRESS: u64 = 0xFC000000;
unsafe extern "C" fn acpi_lapic_id(cpu: libc::c_uint) -> u32 {
cpu * 2
}
fn align_it(p: u64, a: u64) -> u64 {
((p) + ((a) - 1)) & !((a) - 1)
}
unsafe extern "C" fn acpi_mem_alloc(
ctxt: *mut acpi_ctxt,
size: u32,
mut align: u32,
) -> *mut c_void {
let ctx = (*ctxt).ptr as *mut AcpiBuildContext;
if align < 16 {
align = 16;
}
let s = align_it((*ctx).guest_curr, align as u64);
let e = s + size as u64 - 1;
if (e < s) || (e >= (*ctx).guest_end) {
return std::ptr::null_mut();
}
(*ctx).guest_curr = e;
(*ctx).buf.add((s - (*ctx).guest_start) as usize) as *mut c_void
}
unsafe extern "C" fn acpi_mem_free(_: *mut acpi_ctxt, _: *mut libc::c_void, _: u32) {}
unsafe extern "C" fn acpi_v2p(ctxt: *mut acpi_ctxt, v: *mut c_void) -> libc::c_ulong {
let ctx = (*ctxt).ptr as *mut AcpiBuildContext;
(*ctx).guest_start + (v as u64 - ((*ctx).buf as u64))
}
#[repr(C)]
struct AcpiBuildContext {
page_size: u64,
page_shift: u64,
buf: *mut u8,
guest_curr: u64,
guest_start: u64,
guest_end: u64,
}