CVS log for src/sys/arch/powerpc/booke/booke_pmap.c

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Partially fix PMAP_MINIMALTLB compilation. From andvar@

KNF.

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MI PMAP hardware page table walker support.

This is based on code given to me by Matt Thomas a long time ago with
many updates and bugs fixes from me.

Rename pmap_segtab_t *stp to stb for consistency with a future
pmap_pdetab_t *ptb. pmap_pdetab_t *ptp would be far too confusing.

NFC. Same code before and after.

Pass the pmap in tlb_set_asid for the benefit of aarch64.

Use KERNEL_PID instead of 0. NFC.

Sync with HEAD.

Support pmap_growkernel and KASAN shadow mapping of the new KVA.

Neither mips nor ppc booke actually use pmap_growkernel (at present).

Thanks to rin@ for testing a similar patch on ppc booke.

Fix pmap_procwr() for powerpc/booke:

- Use PAGE_MASK, not PAGE_SIZE, to calculate page offset.
- Do not drop page offset of target address.

Sync w/ HEAD.

Support __HAVE_PMAP_PV_TRACK in sys/uvm/pmap based pmaps (aka common pmap)

Include missing opt_multiprocessor.h and opt_pmap.h.

Style and cosmetic changes. No binary changes intended.

Merge changes from current as of 20200406

With DEBUG defined, it's possible to execute a TLB-vs-segmap consistency
check from a (soft) interrupt handler.  But if a platform does not otherwise
require the pmap_tlb_miss_lock, then where will be a brief window of
inconsistency that, while harmless, will still fire an assertion in the
consistency check.

Fix this with the following changes:
1- Refactor the pmap_tlb_miss_lock into MI code and rename it from
   pmap_tlb_miss_lock_{enter,exit}() to pmap_tlb_miss_lock_{enter,exit}().
   MD code can still define the "md" hooks as necessary, and if so, will
   override the common implementation.
2- Provde a pmap_bootstrap_common() function to perform common pmap bootstrap
   operations, namely initializing the pmap_tlb_miss_lock if it's needed.
   If MD code overrides the implementation, it's responsible for initializing
   its own lock.
3- Call pmap_bootstrap_common() from the mips, powerpc booke, and riscv
   pmap_bootstrap() routines.  (This required adding one for riscv.)
4- Switch powerpc booke to the common pmap_tlb_miss_lock.
5- Enable pmap_tlb_miss_lock if DEBUG is defined, even if it's not otherwise
   required.

PR port-mips/55062 (Failed assertion in pmap_md_tlb_check_entry())

Sync with HEAD

Sync with HEAD

Resolve a couple of conflicts (result of the uimin/uimax changes)

Rename min/max -> uimin/uimax for better honesty.

These functions are defined on unsigned int.  The generic name
min/max should not silently truncate to 32 bits on 64-bit systems.
This is purely a name change -- no functional change intended.

HOWEVER!  Some subsystems have

	#define min(a, b)	((a) < (b) ? (a) : (b))
	#define max(a, b)	((a) > (b) ? (a) : (b))

even though our standard name for that is MIN/MAX.  Although these
may invite multiple evaluation bugs, these do _not_ cause integer
truncation.

To avoid `fixing' these cases, I first changed the name in libkern,
and then compile-tested every file where min/max occurred in order to
confirm that it failed -- and thus confirm that nothing shadowed
min/max -- before changing it.

I have left a handful of bootloaders that are too annoying to
compile-test, and some dead code:

cobalt ews4800mips hp300 hppa ia64 luna68k vax
acorn32/if_ie.c (not included in any kernels)
macppc/if_gm.c (superseded by gem(4))

It should be easy to fix the fallout once identified -- this way of
doing things fails safe, and the goal here, after all, is to _avoid_
silent integer truncations, not introduce them.

Maybe one day we can reintroduce min/max as type-generic things that
never silently truncate.  But we should avoid doing that for a while,
so that existing code has a chance to be detected by the compiler for
conversion to uimin/uimax without changing the semantics until we can
properly audit it all.  (Who knows, maybe in some cases integer
truncation is actually intended!)

update from HEAD

Sync with HEAD

Sync with HEAD.  (Note that most of these changes are simply $NetBSD$
tag issues.)

Tell mpc85xx about uvm_hotplug(9)

Should fix the evbppc build breakage.

Sync with HEAD

Adapt to common pmap changes.

Sync with HEAD (as of 26th Dec)

Remove SYSVSHM-specific code.  The value of shminfo.shmall is zero at
the time this pmap initialization code is called, so the increment is
a no-op.  (Thanks christos@ for pointing it out.)

Sync with HEAD

Avoid race condition between PTE update and TLB miss walk.

When pmap_bootstrap is called, kcpuset_running has not been created yet.

Use correct register for next cacheline address.

Initialize lock objects.

Rebase to HEAD as of a few days ago.

sync with head.

for a reference, the tree before this commit was tagged
as yamt-pagecache-tag8.

this commit was splitted into small chunks to avoid
a limitation of cvs.  ("Protocol error: too many arguments")

Merge riastradh-drm2 to HEAD.

sync with head

sync with HEAD

kcpuset_t changes for the pmap and removal of __cpuset_t

sync with head

Fool gcc into thinking we aren't using r31.  We do use it but we don't
clobber it since it save and restore it from a temporary register.

More cleanup.  Use a union (pmap_segtab) and a typedef (pmap_segtab_t).  Add
more functionality from the mips pmap and try to make it more common to ease
the transition for mips in the future.

s/seg_tab/seg_ptr/

Pull up following revision(s) (requested by matt in ticket #241):
	sys/arch/powerpc/conf/kern-mb.ldscript: revision 1.1
	sys/arch/powerpc/include/booke/pmap.h: revision 1.9
	sys/arch/powerpc/booke/e500_tlb.c: revision 1.8
	sys/arch/powerpc/conf/files.powerpc: revision 1.83
	sys/arch/powerpc/booke/booke_pmap.c: revision 1.13
	sys/arch/powerpc/include/booke/e500var.h: revision 1.5
	sys/arch/evbppc/mpc85xx/machdep.c: revision 1.23
Add ldscript which aligns .data to a 1MB boundary. (used for testing)
Add PMAP_MINIMALTLB defflag
Add vsize_t to pmap_md_{un,}map_poolpage.
Add pmap_kvptefill prototype.
Slightly change pmap_bootstrap prototype.
Add e500_tlb_minimize prototype.
Add support PMAP_MINIMALTLB option.  This changes the default use of TLB1
entries to map all of physical memory to using two TLB1 entries, one for
mapping text and one for data.  The rest of memory is mapped using the
page table which is updated as needed.  This is used to trap memory
corruption issues.
Add support for PMAP_MINIMALTLB.

sync with head

sync to latest -current.

Add support PMAP_MINIMALTLB option.  This changes the default use of TLB1
entries to map all of physical memory to using two TLB1 entries, one for
mapping text and one for data.  The rest of memory is mapped using the
page table which is updated as needed.  This is used to trap memory
corruption issues.

merge to -current.

- bringing kmeminit_nkmempages back and revert pmaps that called this early
- use nkmempages to scale the kmem_arena
- reducing diff to pre kmem/vmem change
   (NKMEMPAGES_MAX_DEFAULT will need adjusting on some archs)

extending vmem(9) to be able to allocated resources for it's own needs.
simplifying uvm_map handling (no special kernel entries anymore no relocking)
make malloc(9) a thin wrapper around kmem(9)
(with private interface for interrupt safety reasons)

releng@ acknowledged

Sync with current pulling P2020 and other newer processor support.

Modify *ASSERTMSG() so they are now used as variadic macros. The main goal
is to provide routines that do as KASSERT(9) says: append a message
to the panic format string when the assertion triggers, with optional
arguments.

Fix call sites to reflect the new definition.

Discussed on tech-kern@. See
http://mail-index.netbsd.org/tech-kern/2011/09/07/msg011427.html

Add missing $NetBSD$ and/or __KERNEL_RCSID.

Add an empty pmap_md_tlb_info_init.

Catchup with rmind-uvmplock merge.

Move some MD parts back to the booke pmap.c.  Cleanup initialization a bit.

PowerPC now exports a common view of cpu.h, vmparam.h and pmap.h
when building a MODULAR kernel or compiling _MODULE.
It should be noted that MODULAR or _MODULE export a view of the kernel
as being MULTIPROCESSOR (even if isn't).
The shared pmap TLB uses mdpg in places where it used mdpg to avoid
deadly embrance inclusion problems.

For debugging, use UVMHIST to create kernel histories pmaphist and
pmapexechist.  This replaces the old pmapdebug/PDB stuff.
In ddb, you can just use kernhist_dump(pmaphist) to view the history
or vmstat -H from userland.

sync with head

Sync with HEAD.

Remove <machine/atomic.h>; use <sys/atomic.h> instead.
Add <powerpc/cpuset.h> (for mpc85xx pmap).
Add some initial MP code for mpc85xx
Rework ipi code to be common across all ppcs
Change PPC to keep curlwp in %r13 while in the kernel.
Move astpending from cpu_info to mdlwp
Improve cpu_need_resched to be more MP friendly.

sync with head

Sync with HEAD

file booke_pmap.c was added on branch rmind-uvmplock on 2011-03-05 20:51:33 +0000

Use _PMAP_PRIVATE to control the inclusion of <powerpc/booke/cpuvar.h>.
This prevents most of the MI files from depending on it.

Add support for BookE Freescale MPC85xx (e500 core) processors.
Add fast softint support for PowerPC (though only booke uses it).
Redo FPU/VEC support and add e500 SPE support.
Rework trap/intrs to use a common trapframe format.
Support SOFTFLOAT (no hardfloat or fpu emulation) for BookE.

Add mpc85xx support for netbsd-5 (with some incompatible kernel changes).

file booke_pmap.c was initially added on branch matt-nb5-pq3.