a tag that has BUS_DMA_KEEP_PG_OFFSET set. Otherwise the page could be
reused with a non-zero offset by a tag that doesn't have
BUS_DMA_KEEP_PG_OFFSET leading to data corruption.
Sleuthing by: avg
Reviewed by: scottl
naming of the partitions (GEOM_PART_EBR_COMPAT). When
compatibility is enabled, changes to the partitioning are
disallowed.
Remove the device name aliasing added previously to provide
backward compatibility, but which in practice doesn't give
us anything.
Enable compatibility on amd64 and i386.
- Do not iterate int 15h, function e820h twice. Instead, we use STAILQ to
store each return buffer and copy all at once.
- Export optional extended attributes defined in ACPI 3.0 as separate
metadata. Currently, there are only two bits defined in the specification.
For example, if the descriptor has extended attributes and it is not
enabled, it has to be ignored by OS. We may implement it in the kernel
later if it is necessary and proven correct in reality.
- Check return buffer size strictly as suggested in ACPI 3.0.
Reviewed by: jhb
Remove a hack to generate more efficient code for port numbers below
0x100, which has been obsolete for at least ten years, because GCC has
an asm constraint to specify that.
Submitted by: Christoph Mallon <christoph mallon gmx de>
Most compilers nowadays (including GCC) are smart enough to know what's
going on and generate more efficient code anyway.
Submitted by: Christoph Mallon <christoph.mallon@gmx.de>
Because the "c" input constaint is used, the compiler will already place
the MSR_FSBASE/MSR_GSBASE constants in ecx. Using __asm("ecx") makes
LLVM crash. Even though this is also an LLVM bug, we'd better remove the
unnecessary GCCism as well.
Submitted by: Christoph Mallon <christoph.mallon@gmx.de>
1) Move the new field (brand_note) to the end of the Brandinfo structure.
2) Add a new flag BI_BRAND_NOTE that indicates that the brand_note pointer
is valid.
3) Use the brand_note field if the flag BI_BRAND_NOTE is set and as old
modules won't have the flag set, so the new field brand_note would be
ignored.
Suggested by: jhb
Reviewed by: jhb
Approved by: kib (mentor)
MFC after: 6 days
the kernel on amd64. Fill and read segment registers for mcontext and
signals. Handle traps caused by restoration of the
invalidated selectors.
Implement user-mode creation and manipulation of the process-specific
LDT descriptors for amd64, see sysarch(2).
Implement support for TSS i/o port access permission bitmap for amd64.
Context-switch LDT and TSS. Do not save and restore segment registers on
the context switch, that is handled by kernel enter/leave trampolines
now. Remove segment restore code from the signal trampolines for
freebsd/amd64, freebsd/ia32 and linux/i386 for the same reason.
Implement amd64-specific compat shims for sysarch.
Linuxolator (temporary ?) switched to use gsbase for thread_area pointer.
TODO:
Currently, gdb is not adapted to show segment registers from struct reg.
Also, no machine-depended ptrace command is added to set segment
registers for debugged process.
In collaboration with: pho
Discussed with: peter
Reviewed by: jhb
Linuxolator tested by: dchagin
Reorder amd64 gdt descriptors so that user-accessible selectors are the
same as on i386. At least Wine hard-codes this into the binary.
In collaboration with: pho
Reviewed by: jhb
Provides i386/freebsd API-compatible definitions for the argument
structures of the above sysarch commands. struct i386_ioperm_args
definition is ABI-compatible.
In collaboration with: pho
Reviewed by: jhb
To keep these structures ABI-compatible, half the size of r_trapno,
r_err, mc_trapno, mc_flags.
Add fsbase and gsbase to mcontext on both amd64 and i386.
Add flags to amd64 mcontext to indicate that it contains valid segments
or bases.
In collaboration with: pho
Discussed with: peter
Reviewed by: jhb
as 'real memory' instead of Maxmem if the value is available.
Note amd64 displayed physmem as 'usable memory' since machdep.c r1.640
to unconfuse users. Now it is consistent across amd64 and i386 again.
While I am here, clean up smbios.c a bit and update copyright date.
Reviewed by: jhb
typedef l_long l_off_t;
Change l_mmap_argv's to l_ulong for pgoff. This restores prior behaviour
to consumers of l_off_t but allows mmap to mmap a 32bit position which a
Linux application requires to access SMBIOS data via /dev/mem.
Reviewed by: dchagin
Prompted by: rdivacky
via the Linux tool.
- Add Linux shim to ipmi(4)
- Create a partitions file to linprocfs to make Linux fdisk see
disks. This file is dynamic so we can see disks come and go.
- Convert msdosfs to vfat in mtab since Linux uses that for
msdosfs.
- In the Linux mount path convert vfat passed in to msdosfs
so Linux mount works on FreeBSD. Note that tasting works
so that if da0 is a msdos file system
/compat/linux/bin/mount /dev/da0 /mnt
works.
- fix a 64it bug for l_off_t.
Grabing sh, mount, fdisk, df from Linux, creating a symlink of mtab to
/compat/linux/etc/mtab and then some careful unpacking of the Linux bmc
update tool and hacking makes it work on newer Dell boxes. Note, probably
if you can't figure out how to do this, then you probably shouldn't be
doing it :-)
in AMD FPUs:
- Do not clear the affected state in the case that the FPU registers for
the thread that already owns the FPU are changed via fpu_setregs(). The
only local information the thread would see is its own state in that
case.
- Fix a type mismatch for the dummy variable used in a "fld". It accepts
a float, not a double.
Reviewed by: bde
Approved by: so (cperciva)
MFC after: 1 month
the requested PCI bus falls outside of the bus range given in the ACPI
MCFG table. Several BIOSes seem to not include all of the PCI busses in
systems in their MCFG tables. It maybe that the BIOS is simply buggy and
does support all the busses, but it is more conservative to just fall back
to the old method unless it is certain that memory accesses will work.
- Call acpi_resync_clock() to reset system time before hardclock is ready
to tick. Note we assume the current timecounter hardware and RTC are
already available for read operation.
Tested by: mav
stored in the pmap is from the direct map region. The two exceptions have
been the kernel pmap and the swapper's pmap. These pmaps have used a
kernel virtual address established by pmap_bootstrap() for their shared
pml4 page table page. However, there is no reason not to use the direct
map for these pmaps as well.
driver in Linux 2.6. uscanner was just a simple wrapper around a fifo and
contained no logic, the default interface is now libusb (supported by sane).
Reviewed by: HPS
to the full path of the image that is being executed.
Increase AT_COUNT.
Remove no longer true comment about types used in Linux ELF binaries,
listed types contain FreeBSD-specific entries.
Reviewed by: kan
This code is heavily inspired by Takanori Watanabe's experimental SMP patch
for i386 and large portion was shamelessly cut and pasted from Peter Wemm's
AP boot code.
".note.ABI-tag" section.
The search order of a brand is changed, now first of all the
".note.ABI-tag" is looked through.
Move code which fetch osreldate for ELF binary to check_note() handler.
PR: 118473
Approved by: kib (mentor)
table pages. Now, all accesses to user-space page table pages are
performed through the direct map. (The recursive mapping is only used
to access kernel-space page table pages.)
Eliminate the TLB invalidation on the recursive mapping when a user-space
page table page is removed from the page table and when a user-space
superpage is demoted.
system call entry path and i386 IP checksum generation: we now assume
all code is MPSAFE unless explicitly marked otherwise. Remove XXX
Giant comments along similar lines: the code by the comments either
doesn't need or doesn't want Giant (especially the NMI handler).
MFC after: 3 days
ABIs:
- Store the FPU initial control word in the pcb for each thread.
- When first using the FPU, load the initial control word after restoring
the clean state if it is not the standard control word.
- Provide a correct control word for Linux/i386 binaries under
FreeBSD/amd64.
- Adjust the control word returned for fpugetregs()/npxgetregs() when a
thread hasn't used the FPU yet to reflect the real initial control
word for the current ABI.
- The Linux/i386 ABI for FreeBSD/i386 now properly sets the right control
word instead of trashing whatever the current state of the FPU is.
Reviewed by: bde
- fpudna() always returned 1 since amd64 CPUs always have FPUs. Change
the function to return void and adjust the calling code in trap() to
assume the return 1 case is the only case.
- Remove fpu_cleanstate_ready as it is always true when it is tested.
Also, only initialize fpu_cleanstate when fpuinit() is called on the BSP.
Reviewed by: bde
