kmi - ACTIVE - Kernel with migrating threads as IPC

Age	Commit message (Collapse)	Author
2024-07-07	smp now seems to work	Kimplul
	+ Had some minor issues with a wraparound of size_t that effectively meant that some regions were allocated twice. Also, booting should be a bit more reliable now, turned out that the previous iteration of the booting was just accidentally working due to the kernel being placed 'close enough' in RAM to where it was linked to. Fixed by allocating a vmem of O1 that maps the kernel to a 2MiB boundary at boot, pretty nifty.
2024-07-06	pretty massive virtual memory rewrite	Kimplul
	+ The system is now a bit simpler and hopefully easier to understand, while also extending the shared memory to be 1:N, where there is one owner who may become a zombie while waiting for the N to die.
2024-07-05	implement bkl	Kimplul
	+ Start out using big kernel lock, apparently seL4 thinks its good enough. I might have a go at using a more fair lock, and possibly moving to more fine-grained locks if I really feel the need to get scalability up.
2023-10-09	move rpc stack handling to arch-specific code	Kimplul
	+ Fairly considerable speedup, as we don't have to look up the rpc pte every time separately, instead cacheing them. Adds an architecture specific limitation to total rpc stack size, though.
2023-08-04	add initial smp bringup	Kimplul

2023-07-31	start working on irqs	Kimplul

2023-06-08	skip saving registers when possible	Kimplul

2023-06-08	add fast userspace return to do_ipc	Kimplul

2023-06-07	change register save/load to increasing order	Kimplul

2023-05-17	align handle_irq to four byte boundaries always	Kimplul
	+ CSR_STVEC requires four byte alignment
2023-05-12	fix LLVM compilation	Kimplul
	+ RELEASE=1 doesn't work for some reason, though
2023-05-01	update license stuff	Kimplul

2022-11-21	make syscall handlers void	Kimplul

2022-11-13	~700k ipc requests	Kimplul
	+ Eliminated need for save/load_regs, now the register save area is behind a pointer which _slightly_ increases overall syscall delay, but speeds up ipc requests by a fair bit.
2022-11-09	add basic IPI structure	Kimplul

2022-10-21	initial spawn implementation	Kimplul

2022-09-15	change syscalls to take 5 params and return 6	Kimplul
	+ In total, a syscall is built up of 6 values, with the first being the syscall number. Symmetrically, the first value is now a status and the following five values return "values". This allows us to cram in more info into the ipc_* functions. The performance difference is absolutely minimal, at least from my testing in qemu.
2022-09-14	add putch syscall for easier userspace debugging	Kimplul
	+ Note that it is NOT intended for end user usage, just for debugging.
2022-09-14	add canary to kernel stack	Kimplul

2022-06-12	add license texts	Kimplul

2022-06-11	continue documentation	Kimplul

2022-05-23	modify file gen	Kimplul

2022-05-23	new include structure, make parse easier for doxy	Kimplul

2022-05-21	add status info to memory mappings	Kimplul
	+ next up would probably be to start working on process/thread relationships, largely as documented. Still not entirely sure about how I want to handle fork, but I suppose I might figure it out at some point.
2022-05-09	improve uapi	Kimplul