that TLBINFO_ASID_INUSE_P() returns just 0 or 1; the underlying
__BITMAP_ISSET() actually returns the matching bit nowadays, which
caused miscounting
fixes PR kern/53054 by Sevan Janiyan
KERNEL_PID> to avoid triggering KASSERT() checking allocated asid
is bigger than KERNEL_PID; adjust also TLBINFO_ASID_INITIAL_FREE()
accordingly
discussed with Nick
it possible to override the ASID bitmap length; default to 256 ASIDs as before
XXX NFCI; compile tested only on evbpcc and evbmips, unfortunately didn't
find any combination of port using the MI pmap_tlb.c and working in QEMU
in PR kern/52639, as well as some general cleaning-up...
(As proposed on tech-kern@ with additional changes and enhancements.)
Details of changes:
* All history arguments are now stored as uintmax_t values[1], both in
the kernel and in the structures used for exporting the history data
to userland via sysctl(9). This avoids problems on some architectures
where passing a 64-bit (or larger) value to printf(3) can cause it to
process the value as multiple arguments. (This can be particularly
problematic when printf()'s format string is not a literal, since in
that case the compiler cannot know how large each argument should be.)
* Update the data structures used for exporting kernel history data to
include a version number as well as the length of history arguments.
* All [2] existing users of kernhist(9) have had their format strings
updated. Each format specifier now includes an explicit length
modifier 'j' to refer to numeric values of the size of uintmax_t.
* All [2] existing users of kernhist(9) have had their format strings
updated to replace uses of "%p" with "%#jx", and the pointer
arguments are now cast to (uintptr_t) before being subsequently cast
to (uintmax_t). This is needed to avoid compiler warnings about
casting "pointer to integer of a different size."
* All [2] existing users of kernhist(9) have had instances of "%s" or
"%c" format strings replaced with numeric formats; several instances
of mis-match between format string and argument list have been fixed.
* vmstat(1) has been modified to handle the new size of arguments in the
history data as exported by sysctl(9).
* vmstat(1) now provides a warning message if the history requested with
the -u option does not exist (previously, this condition was silently
ignored, with only a single blank line being printed).
* vmstat(1) now checks the version and argument length included in the
data exported via sysctl(9) and exits if they do not match the values
with which vmstat was built.
* The kernhist(9) man-page has been updated to note the additional
requirements imposed on the format strings, along with several other
minor changes and enhancements.
[1] It would have been possible to use an explicit length (for example,
uint64_t) for the history arguments. But that would require another
"rototill" of all the users in the future when we add support for an
architecture that supports a larger size. Also, the printf(3) format
specifiers for explicitly-sized values, such as "%"PRIu64, are much
more verbose (and less aesthetically appealing, IMHO) than simply
using "%ju".
[2] I've tried very hard to find "all [the] existing users of kernhist(9)"
but it is possible that I've missed some of them. I would be glad to
update any stragglers that anyone identifies.
Introduce uvm_hotplug(9) to the kernel.
Many thanks, in no particular order to:
TNF, for funding the project.
Chuck Silvers - for multiple API reviews and feedback.
Nick Hudson - for testing on multiple architectures and bugfix patches.
Everyone who helped with boot testing.
KeK (http://www.kek.org.in) for hosting the primary developers.
ensure it fits in the actual array. fixes N64 binaries from
triggering later panic. move the panic check itself into a
common function that is called from a couple of new places too.
re-mapping a VA to a new PA the old mapping is removed first. This means
the cache alias code need to do less work and works better with the last
va tracking.
entries using an ASID from the TLB. Add support for taking advantage of it.
Most ARMs don't have an easy way to find out what's in the TLB so make
record_asids can just say all ASIDs are in use. Fix some off by 1 errors.
