wireguard-openbsd/sys/arch/mips64, branch jd/queueboosts

cpu_rnd_messybits() for mips64

2020-06-05T13:35:20Z

Use CP0 Count as a basis. Also take noise from virtual memory activity by including BadVAddr. OK deraadt@ dlg@

introduce "cpu_rnd_messybits" for use instead of nanotime in dev/rnd.c.

2020-05-31T06:23:56Z

rnd.c uses nanotime to get access to some bits that change quickly between events that it can mix into the entropy pool. it doesn't use nanotime to get a monotonically increasing set or ordered and accurate timestamps, it just wants something with bits that change. there's been discussions for years about letting rnd use a clock that's super fast to read, but not necessarily accurate, but it wasn't until recently that i figured out it wasn't interested in time at all, so things like keeping a fast clock coherent between cpu cores or correct according to ntp is unecessary. this means we can just let rnd read the cycle counters on cpus and things will be fine. cpus with cycle counters that vary in their speed and arent kept consistent between cores may even be desirable in this context. so this is the first step in converting rnd.c to reading cycle counter. it copies the nanotime backend to each arch, and they can replace it with something MD as a second step later on. djm@ suggested rnd_messybytes, but we landed on cpu_rnd_messybits. thanks to visa for his eyes. ok deraadt@ visa@ deraadt@ says he will help handle any MD fallout that occurs.

dev/rndvar.h no longer has statistical interfaces (removed during various

2020-05-29T04:42:23Z

conversion steps). it only contains kernel prototypes for 4 interfaces, all of which legitimately belong in sys/systm.h, which are already included by all enqueue_randomness() users.

Retire .

2020-05-27T15:16:04Z

Nothing uses the header anymore. OK deraadt@ mpi@

Use a distinct trap code with retguard on mips64.

2020-05-23T07:18:50Z

This lets the kernel detect retguard traps and send SIGABRT instead of SIGEMT. SIGEMT does not indicate correctly the nature of the error (stack overflow, violation of control flow). It can confuse the user to restart the program without further investigation. Prompted by and OK deraadt@ OK mortimer@

Make inittodr() and resettodr() MI.

2020-05-16T14:44:44Z

ok deraadt@, mpi@, visa@ ok cheloha@ as well (would have preferred in new file for this code)

Use todr_gettime() in cp0_calibrate() on mips64.

2020-05-16T03:35:52Z

This allows changing RTC drivers from to API. OK kettenis@

Initialize the timeval passed to todr_gettime() with the base time from

2020-05-11T13:25:31Z

the file system such that implementations can use it to guess the right century. ok mpi@

Use the same inittodr()/resettodr() implementation as on

2020-05-09T22:12:18Z

amd64/arm64/armv7/hppa/i386/macppc/sparc64 and move it to the end of mips64_machdep.c. Wrap the existing tod_get and tod_set hooks into something that can be used as a todr_handle. ok visa@

Sync existing stacktrace_save() implementations

2020-04-18T04:45:20Z

Upgrade stacktrace_save() to stacktrace_save_at() on architectures where the latter is missing. Define stacktrace_save() as an inline function in header to reduce duplication of code. OK mpi@