test: on-hardware SMP self-test (revoke/kill must stop every hart) + make test-qemu

crates/init/src/lib.rs

@@ -3,6 +3,7 @@
 extern crate alloc;
 
 mod devices;
+mod selftest;
 
 use types::address::{EntryPoint, StackPointer, VirtualAddress};
 use types::bounded::{CapSlot, PageCount};
@@ -12,7 +13,7 @@ use libkos::syscall;
 
 const PAGE_SIZE: usize = 4096;
 const USER_CODE_BASE: usize = 0x10000;
-const USER_STACK_TOP: StackPointer = StackPointer::from_raw(USER_CODE_BASE);
+pub(crate) const USER_STACK_TOP: StackPointer = StackPointer::from_raw(USER_CODE_BASE);
 const USER_STACK_PAGES: usize = 4;
 /// Where a program file is read to before it is loaded (16 pages: the
 /// largest program init will load).
@@ -36,12 +37,12 @@ fn read_file(storage: &mut Storage, scratch: &mut [u8], filename: &[u8]) -> Opti
     read.filter(|r| Some(*r) == size)
 }
 
-struct LoadedProcess {
-    process_cap: CapSlot,
-    entry_point: EntryPoint,
+pub(crate) struct LoadedProcess {
+    pub(crate) process_cap: CapSlot,
+    pub(crate) entry_point: EntryPoint,
 }
 
-fn load_binary(storage: &mut Storage, scratch: &mut [u8], filename: &[u8]) -> Option<LoadedProcess> {
+pub(crate) fn load_binary(storage: &mut Storage, scratch: &mut [u8], filename: &[u8]) -> Option<LoadedProcess> {
     let file_size = read_file(storage, scratch, filename)?;
     let elf_data = &scratch[..file_size];
     let elf_info = match elf::parse(elf_data) {
@@ -156,6 +157,13 @@ pub fn run() -> ! {
         libkos::println!("ok (entry={:#x})", loaded.entry_point.raw());
     }
 
+    // The test image carries the SMP self-test; it runs instead of the
+    // desktop and halts the machine.
+    if storage.open(b"smptest.elf").is_ok_and(|h| storage.close(h).is_ok()) {
+        libkos::println!("init: running the SMP self-test");
+        selftest::run(&mut storage, scratch);
+    }
+
     libkos::print!("init: loading snake... ");
     if let Some(snake) = load_binary(&mut storage, scratch, b"snake.elf") {
         // A client only calls: Execute, never Read, so it cannot pose as
@@ -189,7 +197,7 @@ fn scratch() -> Option<&'static mut [u8]> {
 
 /// Nothing to supervise yet: block on a notification nobody signals
 /// rather than spin a core on Yield.
-fn idle() -> ! {
+pub(crate) fn idle() -> ! {
     let idle = syscall::create_notification();
     loop {
         match idle {