pmcstat request for close will generate a close event.
This event will be in turn received by pmcstat to close the file.
Reviewed by: kib
Tested by: pho
MFC after: 1 week
Sponsored by: Stormshield
The implementation of the Kernel Page Table Isolation (KPTI) for
amd64, first version. It provides a workaround for the 'meltdown'
vulnerability. PTI is turned off by default for now, enable with the
loader tunable vm.pmap.pti=1.
The pmap page table is split into kernel-mode table and user-mode
table. Kernel-mode table is identical to the non-PTI table, while
usermode table is obtained from kernel table by leaving userspace
mappings intact, but only leaving the following parts of the kernel
mapped:
kernel text (but not modules text)
PCPU
GDT/IDT/user LDT/task structures
IST stacks for NMI and doublefault handlers.
Kernel switches to user page table before returning to usermode, and
restores full kernel page table on the entry. Initial kernel-mode
stack for PTI trampoline is allocated in PCPU, it is only 16
qwords. Kernel entry trampoline switches page tables. then the
hardware trap frame is copied to the normal kstack, and execution
continues.
IST stacks are kept mapped and no trampoline is needed for
NMI/doublefault, but of course page table switch is performed.
On return to usermode, the trampoline is used again, iret frame is
copied to the trampoline stack, page tables are switched and iretq is
executed. The case of iretq faulting due to the invalid usermode
context is tricky, since the frame for fault is appended to the
trampoline frame. Besides copying the fault frame and original
(corrupted) frame to kstack, the fault frame must be patched to make
it look as if the fault occured on the kstack, see the comment in
doret_iret detection code in trap().
Currently kernel pages which are mapped during trampoline operation
are identical for all pmaps. They are registered using
pmap_pti_add_kva(). Besides initial registrations done during boot,
LDT and non-common TSS segments are registered if user requested their
use. In principle, they can be installed into kernel page table per
pmap with some work. Similarly, PCPU can be hidden from userspace
mapping using trampoline PCPU page, but again I do not see much
benefits besides complexity.
PDPE pages for the kernel half of the user page tables are
pre-allocated during boot because we need to know pml4 entries which
are copied to the top-level paging structure page, in advance on a new
pmap creation. I enforce this to avoid iterating over the all
existing pmaps if a new PDPE page is needed for PTI kernel mappings.
The iteration is a known problematic operation on i386.
The need to flush hidden kernel translations on the switch to user
mode make global tables (PG_G) meaningless and even harming, so PG_G
use is disabled for PTI case. Our existing use of PCID is
incompatible with PTI and is automatically disabled if PTI is
enabled. PCID can be forced on only for developer's benefit.
MCE is known to be broken, it requires IST stack to operate completely
correctly even for non-PTI case, and absolutely needs dedicated IST
stack because MCE delivery while trampoline did not switched from PTI
stack is fatal. The fix is pending.
Reviewed by: markj (partially)
Tested by: pho (previous version)
Discussed with: jeff, jhb
Sponsored by: The FreeBSD Foundation
MFC after: 2 weeks
Add missing little-endian 64-bit read and write. Since there
is no direct ASM opcode for this, perform byte swap if
necessary.
Created by: Wojciech Macek <wma@semihalf.com>
Obtained from: Semihalf
Sponsored by: QCM Technologies
Use current userspace address for segment mapping. Previously,
there was a bug which made the funciton constantly using the userspace
base address which could cause data integrity issues.
Created by: Wojciech Macek <wma@semihalf.com>
Obtained from: Semihalf
Sponsored by: QCM Technologies
Add CXGBE driver which is required for PowerNV system.
Also, remove AHCI which does not work in BigEndian.
Created by: Wojciech Macek <wma@semihalf.com>
Obtained from: Semihalf
Sponsored by: QCM Technologies
FreeBSD prints text char-by-char, which is not what OPAL
is designed to. Poll events more frequently to avoid buffer
overflow and loosing data.
Created by: Wojciech Macek <wma@semihalf.com>
Obtained from: Semihalf
Sponsored by: QCM Technologies
Fixes:
- map all devices to PE0
- use 1:1 TCE mapping
- provide the same TCE mapping for all PEs (not only PE0)
- add TCE reset and alignment (required by OPAL)
Created by: Wojciech Macek <wma@semihalf.com>
Obtained from: Semihalf
Sponsored by: QCM Technologies
On a SPROM-less device, the PCI(e) bridge core will be initialized with its
power-on-reset defaults; this can leave the SPROM-derived BHND_PCI_SRSH_PI
value pointing to the wrong backplane address. This value is used by the
PCI core when performing address translation between the static register
windows in BAR0 that map the PCI core's register block, and backplane
address space.
Previously, bhndb_pci(4) incorrectly used the potentially invalid static
BAR0 PCI register windows when attempting to correct the BHND_PCI_SRSH_PI
value in the PCI core's SPROM shadow.
Instead, we now read/update BHND_PCI_SRSH_PI by fetching the PCI core's
backplane address from the core enumeration table, and then using a dynamic
register window to explicitly map the PCI core's register block into BAR0.
Sponsored by: The FreeBSD Foundation
The static atrtc_set() function was called only from clock_settime(), so
just move its contents entirely into clock_settime() and delete atrtc_set().
Rename the struct bcd_clocktime variables from 'ct' to 'bct'. I had
originally wanted to emphasize how identical the clocktime and bcd_clocktime
structs were, but things evolved to the point where the structs are not at
all identical anymore, so now emphasizing the difference seems better.
Move the the NetBSD tag near to the related licence. Update it to reflect
better the point where we started diverging.
Use grouping parenthesis for the SPDX tag.
No functional change.
When processing a SACK advancing the cumtsn-ack in fast recovery,
increment the miss-indications for all TSN's reported as missing.
Thanks to Fabian Ising for finding the bug and to Timo Voelker
for provinding a fix.
This fix moves also CMT related initialisation of some variables
to a more appropriate place.
MFC after: 1 week
Both flags do the same thing but -n is more widely supported.
Reviewed By: jhb, emaste
Approved By: jhb (mentor)
Differential Revision: https://reviews.freebsd.org/D13936
I need these tools in order to install the crossbuilt FreeBSD and create a
disk image. Linux does not have a st_flags in struct stat so unfortunately
I need a bunch of ugly ifdefs. The resulting binaries allow me to
sucessfully install a MIPS64 world and create a disk-image that boots.
Reviewed By: brooks, bdrewery, emaste
Approved By: jhb (mentor)
Differential Revision: https://reviews.freebsd.org/D13307
In order to crossbuild FreeBSD on Mac/Linux I also need to build libnetbsd
and FILE* is not equal to struct __sFILE on those platforms.
Reviewed By: brooks, emaste
Approved By: jhb (mentor)
Differential Revision: https://reviews.freebsd.org/D13305
r328032 introduced a second round of argument parsing to proxy the request
through to a jail as needed, but failed to reset OPTIND before getting to
the second round of parsing to allow other flags to be set.
Reported by: Oleg Ginzburg <olevole olevole ru>
This adds explicit crp_mbuf and crp_uio pointers of the right type to
replace casts of crp_buf. This does not sweep through changing existing
code, but new code should use the correct fields instead of casts.
Reviewed by: kib
Sponsored by: Chelsio Communications
Differential Revision: https://reviews.freebsd.org/D13927
Focus on code where we are doing multiplications within malloc(9). These
are not likely to overflow, however the change is still useful as some
static checkers can benefit from the allocation attributes we use for
mallocarray.
Attempting to retrieve an md_cval string from a kernel module with
kldxref would throw a offset error for modules created using lld, since
this value would be placed at the end of all allocated sections.
Add an ef_read_seg_string method to the ef interface, to allow reading
strings of varying size without attempting to read beyond the segment's
bounds.
PR: 224875
Submitted by: Mitchell Horne <mhorne063@gmail.com>
Reviewed by: cem, kib
Sponsored by: The FreeBSD Foundation
Differential Revision: https://reviews.freebsd.org/D13923
to the next int position.
Bug was introduced in r324959 ("Extract a set of pmcstat functions and
interfaces to the new internal library -- libpmcstat.")
This fixes pmcstat top mode (-T) operation.
Example: pmcstat -n1 -S clock.hard -T
Reported by: Peter Holm <peter@holm.cc>
Sponsored by: DARPA, AFRL
Make XICS to be OPAL-aware.
Created by: Nathan Whitehorn <nwhitehorn@freebsd.org>
Submitted by: Wojciech Macek <wma@semihalf.com>
Sponsored by: FreeBSD Foundation
P1022 SATA controller may set the wrong CCR bit for a command completion.
This would previously cause an interrupt storm. Solve this by marking all
commands complete, and letting the end_transaction deal with the successes.
Causes no problems on P5020.
While here, fix a minor bug in collision detection. The Freescale SATA
controller only has 16 slots, not 32.
related series of operations without doing a lock/unlock for each byte.
Use them when reading and writing the entire set of time registers.
The original rtcin() and writertc() functions which do lock/unlock on each
byte still exist, because they are public and called by outside code.
The implementation will follow (D12723). For now, get the changes to
commit-protected files out of the way.
Approved by: secteam (gordon)
Sponsored by: Dell EMC Isilon
Differential Revision: https://reviews.freebsd.org/D13925
This works around a bug with X_COMPILER_TYPE and permits mips64 to build
again with in-tree gcc as well as clang and external gcc.
Sponsored by: DARPA / AFRL
Move the 'X' and 'Y' entries into their sorted location in the list
of flags just above 'Z'.
Reviewed by: bcr
MFC after: 1 week
Differential Revision: https://reviews.freebsd.org/D13904
Provide a -j option that can take a jail name or id. If -j is specified,
check that the jail exists and proxy the service request through to
service(8) in the jail.
This allows for cleaner workflows when updating services in a jail, turning
the following:
pkg -j dns upgrade
jexec dns service named restart
into:
pkg -j dns upgrade
service -j dns named restart
PR: 223325
Submitted by: David O'Rourke (with slight changes)
MFC after: 2 weeks
is NULL. That's more correct and doesn't depend on the error behavior
of utf8_to_ucs2. In practice, we'll never see this though since we
pass utf8_to_ucs2 a well formed string.
Sponsored by: Netflix
Differential Revision: https://reviews.freebsd.org/D13918
and utf8_to_ucs2, be sure to NULL out the return pointer too, rather
than return a pointer to free memory.
Sponsored by: Netflix
Differential Revision: https://reviews.freebsd.org/D13917
r314467 introduced hw.usb.wsp.enable_single_tap_clicks to enable/disable
single-tap left click behavior. Update the man page to reflect the new
sysctl.
PR: 196624
MFC after: 3 days
X-MFC-With: r314467
Focus on code where we are doing multiplications within malloc(9). None of
these ire likely to overflow, however the change is still useful as some
static checkers can benefit from the allocation attributes we use for
mallocarray.
This initial sweep only covers malloc(9) calls with M_NOWAIT. No good
reason but I started doing the changes before r327796 and at that time it
was convenient to make sure the sorrounding code could handle NULL values.
Differential revision: https://reviews.freebsd.org/D13837
Focus on code where we are doing multiplications within malloc(9). None of
these ire likely to overflow, however the change is still useful as some
static checkers can benefit from the allocation attributes we use for
mallocarray.
This initial sweep only covers malloc(9) calls with M_NOWAIT. No good
reason but I started doing the changes before r327796 and at that time it
was convenient to make sure the sorrounding code could handle NULL values.
X-Differential revision: https://reviews.freebsd.org/D13837
