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freebsd-dev/sys
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Nathan Whitehorn f9edb09d70 Move the powerpc64 direct map base address from zero to high memory. This 
accomplishes a few things:
- Makes NULL an invalid address in the kernel, which is useful for catching
  bugs.
- Lays groundwork for radix-tree translation on POWER9, which requires the
  direct map be at high memory.
- Similarly lays groundwork for a direct map on 64-bit Book-E.

The new base address is chosen as the base of the fourth radix quadrant
(the minimum kernel address in this translation mode) and because all
supported CPUs ignore at least the first two bits of addresses in real
mode, allowing direct-map addresses to be used in real-mode handlers.
This is required by Linux and is part of the architecture standard
starting in POWER ISA 3, so can be relied upon.

Reviewed by:	jhibbits, Breno Leitao
Differential Revision:	D14499
2018-03-07 17:08:07 +00:00
..
amd64 amd64: Protect the kernel text, data, and BSS by setting the RW/NX bits 2018-03-06 14:28:37 +00:00
arm aw_usbphy: Move later to SUPPORTDEV pass 2018-03-06 22:45:45 +00:00
arm64 Bump MAXCPUS on arm64. We are starting to see hardware with more than 96 2018-03-07 13:54:44 +00:00
bsm sys: further adoption of SPDX licensing ID tags. 2017-11-20 19:43:44 +00:00
cam Use bool instead of int for predicate functions relating to work 2018-02-23 16:06:54 +00:00
cddl MFV r330591: 8984 fix for 6764 breaks ACL inheritance 2018-03-07 13:49:26 +00:00
compat sys/cloudabi: Avoid relying on GNU specific extensions 2018-03-07 14:47:43 +00:00
conf Add an acpi attachment to the pci_host_generic driver and have the ACPI 2018-03-07 10:47:27 +00:00
contrib MFV: zstd: FIO_addFInfo: Fully initialize output 'total' struct 2018-03-05 20:03:45 +00:00
crypto Remove unused error return from API that cannot fail 2018-02-23 20:15:19 +00:00
ddb db_script_exec: use a saved script name when reporting commands executed 2018-03-04 13:27:21 +00:00
dev Move the powerpc64 direct map base address from zero to high memory. This 2018-03-07 17:08:07 +00:00
dts Switch to mainstream DTS for Raspberry Pi-B and Pi-2. 2018-02-27 15:01:17 +00:00
fs sys/fuse: fix off by one error 2018-03-03 20:42:39 +00:00
gdb amd64: Protect the kernel text, data, and BSS by setting the RW/NX bits 2018-03-06 14:28:37 +00:00
geom g_part_gpt: Fix memory leak in error path 2018-03-07 01:55:50 +00:00
gnu bwn(4): txpid2g/txpid5g[lh] are not defined after sromrev 7; the default 2018-02-13 17:43:54 +00:00
i386 sys: Fix a few potential infoleaks in cloudabi 2018-03-07 14:44:32 +00:00
isa Add ISA PNP tables to ISA drivers. Fix a few incidental comments. 2018-01-29 00:22:30 +00:00
kern Use umtx_copyin_umtx_time32() in __umtx_op_lock_umutex_compat32(). 2018-03-06 01:52:04 +00:00
kgssapi kgssapi: Remove trivial deadcode 2018-02-14 00:12:03 +00:00
libkern iconv uses strlen directly on user supplied memory 2018-02-26 18:23:36 +00:00
mips Remove reference to unimplemented fuiword, etc. 2018-03-06 18:28:55 +00:00
modules Build the ds1672 driver as a module. Add a detach() to unregister the rtc. 2018-03-06 02:30:34 +00:00
net Define ethernet type 0x88A8 as ETHERTYPE_QINQ. 2018-03-06 12:01:31 +00:00
net80211 net80211: sanitize input for ieee80211_output() 2017-12-30 00:40:34 +00:00
netgraph Correct pseudo misspelling in sys/ comments 2018-02-23 18:15:50 +00:00
netinet When checking the TCP fast cookie length, conststently also check 2018-02-27 22:12:38 +00:00
netinet6 Update the MTU in affected routes when IPv6 RA changes the MTU 2018-02-12 19:49:20 +00:00
netipsec Remove unused variables and sysctl declaration. 2018-02-19 12:20:51 +00:00
netpfil pf: Cope with overly large net.pf.states_hashsize 2018-02-25 08:56:44 +00:00
netsmb Unsign some values related to allocation. 2018-01-22 02:08:10 +00:00
nfs Modernize nfssvc(2) registartion. 2018-02-08 20:09:42 +00:00
nfsclient style: Remove remaining deprecated MALLOC/FREE macros 2018-01-25 22:25:13 +00:00
nfsserver sys: general adoption of SPDX licensing ID tags. 2017-11-27 15:23:17 +00:00
nlm Use syscall_helper_register() to register syscalls and initialize though 2018-02-10 01:09:22 +00:00
ofed Make sure VNET is set when calling sa6_recoverscope() in ibcore. 2018-03-07 13:32:52 +00:00
opencrypto Move per-operation data out of the csession structure. 2018-01-26 23:21:50 +00:00
powerpc Move the powerpc64 direct map base address from zero to high memory. This 2018-03-07 17:08:07 +00:00
riscv Unify bulk free operations in several pmaps. 2018-03-04 20:53:20 +00:00
rpc Do pass removing some write-only variables from the kernel. 2017-12-25 04:48:39 +00:00
security mac_portacl(4): stop panicing INVARIANTS-enabled kernel by loading .ko 2018-02-25 23:10:13 +00:00
sparc64 amd64: Protect the kernel text, data, and BSS by setting the RW/NX bits 2018-03-06 14:28:37 +00:00
sys Upgrade our copies of clang, llvm, lld, lldb, compiler-rt and libc++ to 2018-03-04 17:06:37 +00:00
teken sys: general adoption of SPDX licensing ID tags. 2017-11-27 15:23:17 +00:00
tests
tools Avoid using \$. It's an unknown escape sequence. Some awks warn about 2018-01-28 05:13:08 +00:00
ufs This change is some refactoring of Mark Johnston's changes in r329375 2018-03-02 04:34:53 +00:00
vm Remove redundant test from r330410. 2018-03-04 21:15:31 +00:00
x86 Correct pseudo misspelling in sys/ comments 2018-02-23 18:15:50 +00:00
xdr sys: general adoption of SPDX licensing ID tags. 2017-11-27 15:23:17 +00:00
xen sys: general adoption of SPDX licensing ID tags. 2017-11-27 15:23:17 +00:00
Makefile Move sys/boot to stand. Fix all references to new location 2017-11-14 23:02:19 +00:00