fix(xen): arm64 is currently unsupported, treat it as such at runtime

crates/runtime/src/lib.rs

@@ -7,7 +7,7 @@ use log::error;
 use loopdev::LoopControl;
 use tokio::sync::Semaphore;
 use uuid::Uuid;
-use xenclient::{x86pv::X86PvPlatform, XenClient};
+use xenclient::XenClient;
 use xenstore::{XsdClient, XsdInterface};
 
 use self::{
@@ -21,7 +21,11 @@ pub mod channel;
 pub mod ip;
 pub mod launch;
 
-type RuntimePlatform = X86PvPlatform;
+#[cfg(target_arch = "x86_64")]
+type RuntimePlatform = xenclient::x86pv::X86PvPlatform;
+
+#[cfg(not(target_arch = "x86_64"))]
+type RuntimePlatform = xenclient::unsupported::UnsupportedPlatform;
 
 pub struct GuestLoopInfo {
     pub device: String,

crates/xen/xencall/src/sys.rs

@@ -270,7 +270,6 @@ impl Default for CreateDomain {
         CreateDomain {
             ssidref: SECINITSID_DOMU,
             handle: Uuid::new_v4().into_bytes(),
-            #[cfg(target_arch = "x86_64")]
             flags: 0,
             iommu_opts: 0,
             max_vcpus: 1,
@@ -453,8 +452,8 @@ impl Default for VcpuGuestContextFpuCtx {
 
 #[repr(C)]
 #[derive(Copy, Clone, Debug, Default)]
-#[cfg(target_arch = "x86_64")]
-pub struct CpuUserRegs {
+#[allow(non_camel_case_types)]
+pub struct x8664CpuUserRegs {
     pub r15: u64,
     pub r14: u64,
     pub r13: u64,
@@ -493,7 +492,6 @@ pub struct CpuUserRegs {
 
 #[repr(C)]
 #[derive(Copy, Clone, Debug, Default)]
-#[cfg(target_arch = "x86_64")]
 pub struct TrapInfo {
     pub vector: u8,
     pub flags: u8,
@@ -507,7 +505,7 @@ pub struct TrapInfo {
 pub struct x8664VcpuGuestContext {
     pub fpu_ctx: VcpuGuestContextFpuCtx,
     pub flags: u64,
-    pub user_regs: CpuUserRegs,
+    pub user_regs: x8664CpuUserRegs,
     pub trap_ctx: [TrapInfo; 256],
     pub ldt_base: u64,
     pub ldt_ents: u64,
@@ -602,7 +600,7 @@ pub struct Arm64CpuUserRegs {
 #[derive(Copy, Clone, Debug, Default)]
 pub struct Arm64VcpuGuestContext {
     pub flags: u32,
-    pub user_regs: CpuUserRegs,
+    pub user_regs: x8664CpuUserRegs,
     pub sctlr: u64,
     pub ttbcr: u64,
     pub ttbr0: u64,

crates/xen/xenclient/src/boot.rs

@@ -71,7 +71,6 @@ impl BootDomain {
             pfn: self.pfn_alloc_end,
             addr: 0,
             size,
-            #[cfg(target_arch = "x86_64")]
             pages,
         };
 

crates/xen/xenclient/src/lib.rs

@@ -27,6 +27,9 @@ use xenstore::{
 };
 
 pub mod pci;
+
+pub mod unsupported;
+#[cfg(target_arch = "x86_64")]
 pub mod x86pv;
 
 #[derive(Clone)]

crates/xen/xenclient/src/unsupported.rs

@@ -0,0 +1,86 @@
+use xencall::sys::CreateDomain;
+
+use crate::{
+    boot::{BootDomain, BootSetupPlatform, DomainSegment},
+    error::Result,
+};
+
+#[derive(Default, Clone)]
+pub struct UnsupportedPlatform;
+
+impl UnsupportedPlatform {
+    pub fn new() -> Self {
+        Self {}
+    }
+}
+
+#[async_trait::async_trait]
+impl BootSetupPlatform for UnsupportedPlatform {
+    fn create_domain(&self) -> CreateDomain {
+        panic!("unsupported platform")
+    }
+
+    fn page_size(&self) -> u64 {
+        panic!("unsupported platform")
+    }
+
+    fn page_shift(&self) -> u64 {
+        panic!("unsupported platform")
+    }
+
+    fn needs_early_kernel(&self) -> bool {
+        panic!("unsupported platform")
+    }
+
+    fn hvm(&self) -> bool {
+        panic!("unsupported platform")
+    }
+
+    async fn initialize_early(&mut self, _: &mut BootDomain) -> Result<()> {
+        panic!("unsupported platform")
+    }
+
+    async fn initialize_memory(&mut self, _: &mut BootDomain) -> Result<()> {
+        panic!("unsupported platform")
+    }
+
+    async fn alloc_p2m_segment(&mut self, _: &mut BootDomain) -> Result<Option<DomainSegment>> {
+        panic!("unsupported platform")
+    }
+
+    async fn alloc_page_tables(&mut self, _: &mut BootDomain) -> Result<Option<DomainSegment>> {
+        panic!("unsupported platform")
+    }
+
+    async fn setup_page_tables(&mut self, _: &mut BootDomain) -> Result<()> {
+        panic!("unsupported platform")
+    }
+
+    async fn setup_hypercall_page(&mut self, _: &mut BootDomain) -> Result<()> {
+        panic!("unsupported platform")
+    }
+
+    async fn alloc_magic_pages(&mut self, _: &mut BootDomain) -> Result<()> {
+        panic!("unsupported platform")
+    }
+
+    async fn setup_shared_info(&mut self, _: &mut BootDomain, _: u64) -> Result<()> {
+        panic!("unsupported platform")
+    }
+
+    async fn setup_start_info(&mut self, _: &mut BootDomain, _: u64) -> Result<()> {
+        panic!("unsupported platform")
+    }
+
+    async fn bootlate(&mut self, _: &mut BootDomain) -> Result<()> {
+        panic!("unsupported platform")
+    }
+
+    async fn vcpu(&mut self, _: &mut BootDomain) -> Result<()> {
+        panic!("unsupported platform")
+    }
+
+    async fn gnttab_seed(&mut self, _: &mut BootDomain) -> Result<()> {
+        panic!("unsupported platform")
+    }
+}