Commit Graph

3336 Commits

Author SHA1 Message Date
Brandon Bergren
40b664f64b [PowerPC] More relocation fixes
It turns out relocating the symbol table itself can cause issues, like fbt
crashing because it applies the offsets to the kernel twice.

This had been previously brought up in rS333447 when the stoffs hack was
added, but I had been unaware of this and reimplemented symtab relocation.

Instead of relocating the symbol table, keep track of the relocation base
in ddb, so the ddb symbols behave like the kernel linker-provided symbols.

This is intended to be NFC on platforms other than PowerPC, which do not
use fully relocatable kernels. (The relbase will always be 0)

 * Remove the rest of the stoffs hack.
 * Remove my half-baked displace_symbol_table() function.
 * Extend ddb initialization to cope with having a relocation offset on the
   kernel symbol table.
 * Fix my kernel-as-initrd hack to work with booke64 by using a temporary
   mapping to access the data.
 * Fix another instance of __powerpc__ that is actually RELOCATABLE_KERNEL.
 * Change the behavior or X_db_symbol_values to apply the relocation base
   when updating valp, to match link_elf_symbol_values() behavior.

Reviewed by:	jhibbits
Sponsored by:	Tag1 Consulting, Inc.
Differential Revision:	https://reviews.freebsd.org/D25223
2020-06-21 03:39:26 +00:00
Brandon Bergren
fb0543afa8 [PowerPC] Add virtio to GENERIC
Due to kldxref not being able to generate hints for nonnative platforms,
any cross built VM images do not have /boot/kernel/linker.hints.

This prevents the virtio modules from being loaded, as the fallback code
will always fail the version check when the hints are missing.

Since we want to be able to generate VM images for 32 bit powerpc, add the
virtio modules to GENERIC like we do on powerpc64.

Reviewed by:	jhibbits
Sponsored by:	Tag1 Consulting, Inc.
Differential Revision:	https://reviews.freebsd.org/D25271
2020-06-19 18:43:13 +00:00
Brandon Bergren
8415f755f1 [PowerPC] Fix booke64 qemu infinite loop in L2 cache enable
Since qemu does not implement the L2 cache, we get stuck forever waiting
for a bit to be set when trying to invalidate it.

To prevent that, we should bail out if the L2 cache is missing.
One easy way to check this is L2CFG0 == 0 (since L2CSIZE always has at
least one bit set in a valid implementation)

(tested on qemu, rb800, and x5000)

Reviewed by:	jhibbits
Sponsored by:	Tag1 Consulting, Inc.
Differential Revision:	https://reviews.freebsd.org/D25225
2020-06-19 18:40:39 +00:00
Justin Hibbits
ae672aa5e3 powerpc/pmap: Fix pte_find_next() iterators for booke64 pmap
After r361988 fixed the reference count leak on booke64, it became possible
for an iteration somewhere in the middle of a page to become stale, with the
page vanishing (correctly) due to all PTEs on that page going away.
pte_find_next() would start at that iterator, and move along 'higher' order
directory pages until it finds a valid one, without zeroing out the lower
order pages.  For instance:

	/* Find next pte at or above 0x10002000. */
	pte = pte_find_next(pmap, &(0x10002000));
	pte_remove(pmap, pte);
	/* This pte was the last reference in the page table page, page is
	 * gone.
	 */
	pte = pte_find_next(pmap, 0x10002000);
	/* pte_find_next will see 0x10002000's page is gone, and jump to the
	 * next one, but starting iteration at the '0x2000' slot, skipping
	 * 0x0000 and 0x1000.
	 */

This caused some processes, like git, to trip the KASSERT() in
pmap_release().

Fix this by zeroing all lower order iterators at each level.
2020-06-10 23:03:35 +00:00
Justin Hibbits
46e8ab5aa1 powerpc/powernv: Don't use the vmem quantum cache for OPAL PCI MSI allocations
vmem quantum cache is only needed when doing a lot of concurrent allocations,
which doesn't happen when allocating MSIs.  This wastes memory for the cache
zones.  Avoid this waste and don't use the quantum cache.

Reported by:	markj
2020-06-10 04:08:16 +00:00
Justin Hibbits
76d5f5e22c powerpc/mpc85xx: Don't use the quantum cache in vmem for MPIC MSIs
The qcache is unnecessary for this purpose, it's only needed when there are
lots of concurrent allocations.

Reported by:	markj
2020-06-10 04:04:59 +00:00
Justin Hibbits
c8c5600701 powerpc/pmap: Fix wired memory leak in booke64 page directories
Properly handle reference counts in the 64-bit pmap page directories.
Otherwise all page table pages would leak due to over-referencing.  This
would cause a quick enter to swap on a desktop system (AmigaOne X5000) when
quitting and rerunning applications, or just building world.

Add an INVARIANTS check to validate no leakage at pmap release time.
2020-06-09 21:59:13 +00:00
Justin Hibbits
e48f804f8c powerpc/powernv: Don't configure disabled CPUs
If the POWER firmware detects a bad CPU core, it will "GUARD" it out,
marking it disabled.  Any attempt to spin up a bad CPU will trigger a panic
later on when waiting for threads on said core to wake up.  Support limping
along on fewer cores instead.
2020-06-08 02:28:00 +00:00
Justin Hibbits
9016fac6a2 powerpc: Fix nits in copyinout comments from r361861
Also, remove useless nested #ifdefs in the IFUNC block.

Reported by:	bdragon@
2020-06-06 18:56:40 +00:00
Justin Hibbits
d31111442e powerpc: Use IFUNCs for copyin/copyout/etc
Summary:
Radix on AIM, and all of Book-E (currently), can do direct addressing of
user space, instead of needing to map user addresses into kernel space.
Take advantage of this to optimize the copy(9) functions for this
behavior, and avoid effectively NOP translations.

Test Plan: Tested on powerpcspe, powerpc64/booke, powerpc64/AIM

Reviewed by:	bdragon
Differential Revision:	https://reviews.freebsd.org/D25129
2020-06-06 03:09:12 +00:00
Justin Hibbits
3f24b50567 powerpc: Add a (CPU/runtime features) flags set to pcpu struct
Summary:
The point of this addition is to cache CPU behavior 'features', to avoid
having to recompute based on CPU, etc.

The first such use case is to avoid the unnecessary manipulation of the
SLBs (Segment Lookaside Buffers) when using the Radix pmap on POWER9.
Since we already get the PCPU pointer wherever we swap the SLB entries,
we can use a cached flag to check if it's necessary to perform the
operation anyway, and skip it when not.

Reviewed by:	bdragon
Differential Revision:	https://reviews.freebsd.org/D24908
2020-06-06 02:40:52 +00:00
Justin Hibbits
c4bc4ae778 powerpc: Stop advertising that POWER8 and POWER9 support HTM
HTM is on the chopping block, doesn't work on FreeBSD, and has only token
support in PowerISA 3.1 and POWER10.  Don't advertise something we'll never
support.
2020-05-29 00:46:31 +00:00
Justin Hibbits
9a47dfc308 powerpc/pmap: Remove some debug from r361544 2020-05-28 03:08:50 +00:00
Brandon Bergren
9b51a10a9c [PowerPC] Fix radix crash when passing -1 from userspace
Found by running libc tests with radix enabled.

Detect unsigned integer wrapping with a postcondition.

Note: Radix MMU is not enabled by default yet.

Sponsored by:	Tag1 Consulting, Inc.
2020-05-28 00:49:02 +00:00
Justin Hibbits
45b69dd63e powerpc/mmu: Convert PowerPC pmap drivers to ifunc from kobj
With IFUNC support in the kernel, we can finally get rid of our poor-man's
ifunc for pmap, utilizing kobj.  Since moea64 uses a second tier kobj as
well, for its own private methods, this adds a second pmap install function
(pmap_mmu_init()) to perform pmap 'post-install pre-bootstrap'
initialization, before the IFUNCs get initialized.

Reviewed by:	bdragon
2020-05-27 01:24:12 +00:00
Brandon Bergren
64cc3b0c28 [PowerPC] Fix invalid asm in trap code
In this context, 0 actually means 0 (i.e. this is a li instruction).

While most assemblers will ignore this, I did have a compile failure at one
point when using an external toolchain.

In the future, we should use the li syntax to make this clearer.

Sponsored by:	Tag1 Consulting, Inc.
2020-05-27 00:17:05 +00:00
Brandon Bergren
9941cb0657 [PowerPC] Fix atomic_cmpset_masked().
A recent kernel change caused the previously unused atomic_cmpset_masked() to
be used.

It had a typo in it.

Instead of reading the old value from an uninitialized variable, read it
from the passed-in pointer as intended.

This fixes crashes on 64 bit Book-E.

Obtained from:	jhibbits
2020-05-26 19:03:45 +00:00
Justin Hibbits
0aca9ecd85 powerpc/booke pmap: Fix iteration for 64-bit kernel page table creation
Kernel page tables actually start at index 4096, given kernel base address
of 0xc008000000000000, not index 0, which would yield 0xc000000000000000.
Fix this by indexing at the real base, instead of the assumed base.
2020-05-26 03:58:19 +00:00
Brandon Bergren
8ef0c667f4 [PowerPC] Ensure ppc32 cpu_switch routines set up Secure-PLT.
This is a correctness fix needed to enable the ifunc conversion of the pmap
in D24993.

Since we are making function calls that may need to go through the PLT, ensure
r30 is set up correctly.

This fixes crashes when booting with D24993 applied.

Reviewed by:	jhibbits (in IRC)
Sponsored by:	Tag1 Consulting, Inc.
2020-05-26 02:27:10 +00:00
Conrad Meyer
852c303b61 copystr(9): Move to deprecate (attempt #2)
This reapplies logical r360944 and r360946 (reverting r360955), with fixed
copystr() stand-in replacement macro.  Eventually the goal is to convert
consumers and kill the macro, but for a first step it helps if the macro is
correct.

Prior commit message:

Unlike the other copy*() functions, it does not serve to copy from one
address space to another or protect against potential faults.  It's just
an older incarnation of the now-more-common strlcpy().

Add a coccinelle script to tools/ which can be used to mechanically
convert existing instances where replacement with strlcpy is trivial.
In the two cases which matched, fuse_vfsops.c and union_vfsops.c, the
code was further refactored manually to simplify.

Replace the declaration of copystr() in systm.h with a small macro
wrapper around strlcpy (with correction from brooks@ -- thanks).

Remove N redundant MI implementations of copystr.  For MIPS, this
entailed inlining the assembler copystr into the only consumer,
copyinstr, and making the latter a leaf function.

Reviewed by:		jhb (earlier version)
Discussed with:		brooks (thanks!)
Differential Revision:	https://reviews.freebsd.org/D24672
2020-05-25 16:40:48 +00:00
Brandon Bergren
e1110c4082 [PowerPC] Fix kernel boot on powerpc
Recent changes have caused the vmspace objects to start coming from KVA
instead of direct-mapped memory on powerpc. As far as I can tell, this is
not actually a problem, so we should stop arbitrarily asserting that it is.

I do not know why this was not being triggered before.

Approved by:	jhibbits
Sponsored by:	Tag1 Consulting, Inc.
2020-05-21 15:53:16 +00:00
Justin Hibbits
b923b34a0f powerpc: Handle machine checks caused by D-ERAT multihit
Instead of crashing the user process when a D-ERAT multihit is detected, try
to flush the ERAT, and continue.  This machine check indicates a likely PMAP
invalidation shortcoming that will need to be addressed, but it's
recoverable, so just recover.  The recovery is pmap-specific to flush the
ERAT, so add a pmap function to do so, currently only implemented by the
POWER9 radix pmap.
2020-05-21 03:33:20 +00:00
Justin Hibbits
baeeef1d8f powerpc/radix mmu: No need for delayed TLB invalidation
x86 needs delayed TLB invalidation because invalidation requires an
expensive IPI.  PowerPC has had a TLB invalidation instruction since the
POWER1 in 1990, so there's no need to delay anything.
2020-05-20 02:33:41 +00:00
Justin Hibbits
1da3138f68 powerpc/mmu: Don't use the cache instructions to zero pages
A page (even physmem) can be marked as cache-inhibited.  Attempting to use
'dcbz' to zero a page mapped cache-inhibited triggers an alignment
exception, which is fatal in kernel.  This was seen when testing hardware
acceleration with X on POWER9.

At some point in the future, this should be changed to a more straight
forward zero loop instead of bzero(), and a similar change be made to the
other pmaps.

Reported by:	pkubaj@
2020-05-19 01:06:31 +00:00
Justin Hibbits
26644b0125 powerpc/qoriq: Add more devices to config for desktop usage
The most likely users of the QORIQ64 config nowadays are users of AmigaOne
X5000 systems, which are desktops.  They need a framebuffer and
keyboard/mouse, so add these to the config so it works by default once
drm-current-kmod is installed.
2020-05-16 03:33:28 +00:00
Conrad Meyer
051fc58cb3 Revert r360944 and r360946 until reported issues can be resolved
Reported by:	cy
2020-05-12 04:34:26 +00:00
Brandon Bergren
8b4b91df3f [PowerPC64] Minor correctness fix in rstcode.
TRAP_ENTRY(0) should be TRAP_GENTRAP(0) here.

However, in practice, it doesn't matter, as the only time TRAP_ENTRY and
TRAP_GENTRAP can differ is when bridge mode is active, which is impossible
on the 64 bit kernel.

Fix it anyway in case we ever need to add a trap preamble on PPC64.
2020-05-12 01:04:50 +00:00
Conrad Meyer
580744621f copystr(9): Move to deprecate [2/2]
Unlike the other copy*() functions, it does not serve to copy from one
address space to another or protect against potential faults.  It's just
an older incarnation of the now-more-common strlcpy().

Add a coccinelle script to tools/ which can be used to mechanically
convert existing instances where replacement with strlcpy is trivial.
In the two cases which matched, fuse_vfsops.c and union_vfsops.c, the
code was further refactored manually to simplify.

Replace the declaration of copystr() in systm.h with a small macro
wrapper around strlcpy.

Remove N redundant MI implementations of copystr.  For MIPS, this
entailed inlining the assembler copystr into the only consumer,
copyinstr, and making the latter a leaf function.

Reviewed by:	jhb
Differential Revision:	https://reviews.freebsd.org/D24672
2020-05-11 22:57:21 +00:00
Justin Hibbits
65bbba25d2 powerpc64: Implement Radix MMU for POWER9 CPUs
Summary:
POWER9 supports two MMU formats: traditional hashed page tables, and Radix
page tables, similar to what's presesnt on most other architectures.  The
PowerISA also specifies a process table -- a table of page table pointers--
which on the POWER9 is only available with the Radix MMU, so we can take
advantage of it with the Radix MMU driver.

Written by Matt Macy.

Differential Revision: https://reviews.freebsd.org/D19516
2020-05-11 02:33:37 +00:00
Justin Hibbits
81962477fc powerpc: Add a CPU-custom machine check handler
Summary:
Some machine checks are process-recoverable, others are not.  Let a
CPU-specific handler decide what to do.

This works around a machine check error hit while building www/firefox
and mail/thunderbird, which would otherwise cause the build to fail.

More work is needed to handle all possible machine check conditions, but
this is sufficient to unblock some ports building.

Differential Revision: https://reviews.freebsd.org/D23731
2020-05-10 19:00:57 +00:00
Brandon Bergren
9411e24df3 [PowerPC] kernel ifunc support for powerpc*, fix ppc64 relocation oddities.
This is a general cleanup of the relocatable kernel support on powerpc,
needed to enable kernel ifuncs.

 * Fix some relocatable issues in the kernel linker, and change to using
   a RELOCATABLE_KERNEL #define instead of #ifdef __powerpc__ for parts that
   other platforms can use in the future if they wish to have ET_DYN kernels.

 * Get rid of the DB_STOFFS hack now that the kernel is relocated to the DMAP
   properly across the board on powerpc64.

 * Add powerpc64 and powerpc32 ifunc functionality.

 * Allow AIM64 virtual mode OF kernels to run from the DMAP like other AIM64
   by implementing a virtual mode restart. This fixes the runtime address on
   PowerMac G5.

 * Fix symbol relocation problems on post-relocation kernels by relocating
   the symbol table.

 * Add an undocumented method for supplying kernel symbols on powernv and
   other powerpc machines using linux-style kernel/initrd loading -- If
   you pass the kernel in as the initrd as well, the copy resident in initrd
   will be used as a source for symbols when initializing the debugger.
   This method is subject to removal once we have a better way of doing this.

Approved by:	jhibbits
Relnotes:	yes
Sponsored by:	Tag1 Consulting, Inc.
Differential Revision:	https://reviews.freebsd.org/D23156
2020-05-07 19:32:49 +00:00
Mark Johnston
1d6638472b Remove an obsolete TODO comment from several minidump implementations.
The comment referenced a non-existent function, and these minidump
implementations already buffer discontiguous physical data pages by
mapping them into a single VA range that gets passed to the dump device,
so there is no real advantage in batching calls to blk_write().

The RISC-V and MIPS minidump implementations still write a page at a
time and so would benefit from some form of batching.

MFC after:	2 weeks
Sponsored by:	Juniper Networks, Klara Inc.
2020-04-24 18:47:42 +00:00
Brooks Davis
b24e6ac8b7 Convert canary, execpathp, and pagesizes to pointers.
Use AUXARGS_ENTRY_PTR to export these pointers.  This is a followup to
r359987 and r359988.

Reviewed by:	jhb
Obtained from:	CheriBSD
Sponsored by:	DARPA
Differential Revision:	https://reviews.freebsd.org/D24446
2020-04-16 21:53:17 +00:00
John Baldwin
d3920c5b12 Use %zu to print a size_t value instead of %ju.
This fixes the build for 32-bit kernels.
2020-04-16 20:46:35 +00:00
Alfredo Dal'Ava Junior
d80a924822 powerpc: autosize bpvo based on physical memory
Default moea64_bpvo_pool_size 327680 was insufficient for initial
memory mapping at boot time on systems with, for example, 64G and
no huge pages enabled.

Submitted by:	Andre Silva <afscoelho@gmail.com>
Reviewed by:	jhibbits, alfredo
Approved by:	jhibbits (mentor)
Sponsored by:	Eldorado Research Institute (eldorado.org.br)
Differential Revision:	https://reviews.freebsd.org/D24102
2020-04-15 20:33:09 +00:00
Justin Hibbits
69e8f478d5 powerpc/booke: Use power-of-two mappings in 64-bit pmap_mapdev
Summary:
This reduces the precious TLB1 entry consumption (64 possible in
existing 64-bit cores), by adjusting the size and alignment of a device
mapping to a power of 2, to encompass the full mapping and its
surroundings.

One caveat with this: If a mapping really is smaller than a power of 2,
it's possible to get a machine check or hang if the 'missing' physical
space is accessed.  In practice this should not be an issue for users,
as devices overwhelmingly have physical spaces on power-of-two sizes and
alignments, and any design that includes devices which don't follow this
can be addressed by undefining the POW2_MAPPINGS guard.

Reviewed by:	bdragon
Differential Revision: https://reviews.freebsd.org/D24248
2020-04-11 00:17:55 +00:00
Justin Hibbits
d7c0543ff8 powerpc/booke: Add pte_find_next() to find the next in-use PTE
Summary:
Iterating over VM_MIN_ADDRESS->VM_MAXUSER_ADDRESS can take a very long
time iterating one page at a time (2**(log_2(SIZE)-12) operations),
yielding possibly several days or even weeks on 64-bit Book-E, even for
a largely empty, which can happen when swapping out a process by
vmdaemon.  Speed this up by instead finding the next PTE at or equal to
the given VA.

Reviewed by:	bdragon
Differential Revision: https://reviews.freebsd.org/D24238
2020-04-11 00:16:50 +00:00
Justin Hibbits
dd8775a1b0 powerpc/booke: Change Book-E 64-bit pmap to 4-level table
Summary:
The existing page table is fraught with errors, since it creates a hole
in the address space bits.  Fix this by taking a cue from the POWER9
radix pmap, and make the page table 4 levels, 52 bits.

Reviewed by:	bdragon
Differential Revision:	https://reviews.freebsd.org/D24220
2020-04-11 00:12:34 +00:00
Justin Hibbits
ccb1ebe01c powerpc/amigaone: Add CPLD driver for AmigaOne A1222 "Tabor"
Like the X5000, the main CPLD on the A1222 is the communication medium
between the CPU and the GPIO CPLD.  It provides a mailbox communication
feature, along with dual-port RAM accessible from both the CPU and GPIO
CPLD, and 3 fan speed reporting registers.
2020-04-03 20:45:16 +00:00
John Baldwin
59838c1a19 Retire procfs-based process debugging.
Modern debuggers and process tracers use ptrace() rather than procfs
for debugging.  ptrace() has a supserset of functionality available
via procfs and new debugging features are only added to ptrace().
While the two debugging services share some fields in struct proc,
they each use dedicated fields and separate code.  This results in
extra complexity to support a feature that hasn't been enabled in the
default install for several years.

PR:		244939 (exp-run)
Reviewed by:	kib, mjg (earlier version)
Relnotes:	yes
Differential Revision:	https://reviews.freebsd.org/D23837
2020-04-01 19:22:09 +00:00
Justin Hibbits
abc00e5fb9 powerpc/pmap: Replace a logical TAILQ_FOREACH_SAFE with the real thing
No functional change, just cleanup.
2020-03-30 16:32:55 +00:00
Conrad Meyer
ca0ec73c11 Expand generic subword atomic primitives
The goal of this change is to make the atomic_load_acq_{8,16},
atomic_testandset{,_acq}_long, and atomic_testandclear_long primitives
available in MI-namespace.

The second goal is to get this draft out of my local tree, as anything that
requires a full tinderbox is a big burden out of tree.  MD specifics can be
refined individually afterwards.

The generic implementations may not be ideal for your architecture; feel
free to implement better versions.  If no subword_atomic definitions are
needed, the include can be removed from your arch's machine/atomic.h.
Generic definitions are guarded by defined macros of the same name.  To
avoid picking up conflicting generic definitions, some macro defines are
added to various MD machine/atomic.h to register an existing implementation.

Include _atomic_subword.h in arm and arm64 machine/atomic.h.

For some odd reason, KCSAN only generates some versions of primitives.
Generate the _acq variants of atomic_load.*_8, atomic_load.*_16, and
atomic_testandset.*_long.  There are other questionably disabled primitives,
but I didn't run into them, so I left them alone.  KCSAN is only built for
amd64 in tinderbox for now.

Add atomic_subword implementations of atomic_load_acq_{8,16} implemented
using masking and atomic_load_acq_32.

Add generic atomic_subword implementations of atomic_testandset_long(),
atomic_testandclear_long(), and atomic_testandset_acq_long(), using
atomic_fcmpset_long() and atomic_fcmpset_acq_long().

On x86, add atomic_testandset_acq_long as an alias for
atomic_testandset_long.

Reviewed by:	kevans, rlibby (previous versions both)
Differential Revision:	https://reviews.freebsd.org/D22963
2020-03-25 23:12:43 +00:00
Alfredo Dal'Ava Junior
d2d06767b5 [PowerPC] fix panic reading /dev/kmem on !DMAP machines
This fixes /dev/kmem causing panic on machines not using DMAP.

Found when running libkvm Kyua test case on QEMU VM with no
Huge Pages support.

Reviewed by:	jhibbits, luporl
Approved by:	jhibbits (mentor)
Sponsored by:	Eldorado Research Institute (eldorado.org.br)
Differential Revision:	https://reviews.freebsd.org/D23776
2020-03-20 11:51:08 +00:00
Brandon Bergren
3069380898 [PowerPC][Book-E] Fix missing load base in elf_cpu_parse_dynamic().
When I implemented MD DYNAMIC parsing, I was originally passing a
linker_file_t so that the MD code could relocate pointers.

However, it turns out this isn't even filled in until later, so it was
always 0.

Just pass the load base (ef->address) directly, as that's really the only
thing we were interested in in the first place.

This fixes a crash on RB800 where it was trying to write to an unmapped
address when updating the GOT.

Reviewed by:	jhibbits
Sponsored by:	Tag1 Consulting, Inc.
Differential Revision:	https://reviews.freebsd.org/D24105
2020-03-18 02:58:18 +00:00
Justin Hibbits
889d304bb4 powerpc: Axe PPC4xx support.
Summary:
The support was added almost a decade ago, and never completed.  Just axe
it.  It was also inadvertently broken 5 years ago, and nobody noticed.

Reviewed by:	bdragon
Differential Revision:	https://reviews.freebsd.org/D23753
2020-03-18 01:09:43 +00:00
Justin Hibbits
8cf2c8ed64 powerpc: Simplify _nodrop variants of FPU and vector register saves
No need for an extra temporary.  It doesn't even help with readability.

Suggested by:	kib (almost 2 years ago)
2020-03-13 01:27:37 +00:00
Leandro Lupori
c5568ba087 Enable ixl device on PowerPC64
The ixl driver now works on PowerPC64 and may be compiled in-kernel and
as a module.

Reviewed by:	alfredo, erj
Sponsored by:	Eldorado Research Institute (eldorado.org.br)
Differential Revision:	https://reviews.freebsd.org/D23974
2020-03-12 12:47:10 +00:00
Justin Hibbits
d926d5780e powerpc/booke: Split out 32- and 64- bit pmap details from main body
Summary:
This is largely a straight-forward cleave of the 32-bit and 64-bit page
table specifics, along with the mmu_booke_*() functions that are wholely
different between the two implementations.

The ultimate goal of this is to make it easier to reason about and
update a specific implementation without wading through the other
implementation details.  This is in support of further changes to the 64-bit
pmap.

Reviewed by: bdragon
Differential Revision: https://reviews.freebsd.org/D23983
2020-03-10 03:30:11 +00:00
Andreas Tobler
11236821c6 Revert 2020-03-06 23:01:49 +00:00
Andreas Tobler
7e0d320048 Drop 'All rights reserved'
Replace hardcoded sizes by nitems and sizeof
Replace CTLFLAG_NEEDGIANT with CTLFLAG_MPSAFE, I run this driver since a few
years with CTLFLAG_MPSAFE w/o issues.
2020-03-06 21:51:28 +00:00