Currently the seL4_VCPUReg enum only defines the seL4_VCPUReg_VMPIDR_EL2
register when the kernel is configured for SMP. This register should be
available for unicore systems too as otherwise a user level VMM is not
able to control the value of MPIDR_EL1 that the guest VM reads.
Signed-off-by: Kent McLeod <kent@kry10.com>
Additional header files may now be included in non-C contexts and so we
need to guard some C definitions with the __ASSEMBLER__ guards
convention.
Signed-off-by: Kent McLeod <kent@kry10.com>
Now the vspace_cap is used for all vspace roots and all other page
tables are referred to by page table caps.
Signed-off-by: Kent McLeod <kent@kry10.com>
Guard the new implementation of 64-bit x86 guests behind a config
option. This is done so that existing projects that use x86_64 hosts
with ia32-bit guests can continue to be supported until either the old
feature is preferred to be deprecated, or support can be added to
support both simmultaneously.
Signed-off-by: Kent McLeod <kent@kry10.com>
This commit combines a number of smaller commits which do the following:
* Enter IA-32e mode when running a 64-bit host
* Handle additional general purpose registers in 64-bit mode
* Handle 64-bit specific MSR events
* Properly save and restore FS, GS, and Shadow GS registers
CCDC-GVSC DISTRIBUTION A. Approved for public release; distribution
unlimited. OPSEC#4481.
Signed-off-by: Gerwin Klein <gerwin.klein@proofcraft.systems>
Currently, building `libsel4` as a static library with `KernelIsMCS`
enabled fails with the following error:
```
static declaration of 'seL4_NBWait' follows non-static declaration
```
This [was mentioned][1] in the original PR that modified exported
functions to use `LIBSEL4_INLINE_FUNC`.
[1]: https://github.com/seL4/seL4/pull/101#issuecomment-442010551
Signed-off-by: Klim Tsoutsman <klim@tsoutsman.com>
Add a comment that they are empty on purpose. They are not removed to
keep the infrastructure in case there will be deprecated items in the
future.
Signed-off-by: Axel Heider <axelheider@gmx.de>
The MCS-related macros were causing the build to fail when configured to
use the sysenter instruction. Additionally, some message registers
weren't explicitly being passed to the assembly block for
seL4_NBSendRecv in this configuration.
Signed-off-by: Jimmy Brush <code@jimmah.com>
Now that there is no need to reserve page table entries in each VSpace
object, the full architecture specified address space range is usable.
Signed-off-by: Kent McLeod <kent@kry10.com>
Commit 8035f1a7c4 removed "-fno-integrated-as" for llvm, which on more
recent versions (clang-11) means that we now need `#` instead of `$`
for immediate values.
Signed-off-by: Gerwin Klein <gerwin.klein@proofcraft.systems>
- KernelGlobalsFrame caused the definition of seL4_GlobalsFrame which
was a reservation at the top of the user address space on ARMv6
platforms.
- KernelDangerousCodeInjectionOnUndefInstr was used to implement calling
user code in kernel mode won ARMv6.
Signed-off-by: Kent McLeod <kent@kry10.com>
Today the file autoconf.h is created by the CMake build system and thus
HAVE_AUTOCONF is always defined. Time to get rid of some legacy by
removing the check if HAVE_AUTOCONF is set.
Signed-off-by: Axel Heider <axelheider@gmx.de>
A slot in the top level VSpace page table is used to hold the number of
SMMUv2 ContextBanks that are assigned to a VSpace. This means a
reduction of available virtual addresses at userlevel as the slot cannot
be used for holding regular mappings.
Signed-off-by: Kent McLeod <kent@kry10.com>
These files should have been released under BSD-2-Clause in the first
place (as per parent LICENSE.md file).
Closes#245
Signed-off-by: Gerwin Klein <gerwin.klein@data61.csiro.au>
With clang 11 these become bss symbols rather than commons, resulting in
multiple definition errors at link time. gcc 10 is likely to expose the
same issue.
Signed-off-by: Stefan O'Rear <sorear@fastmail.com>
- seL4_BenchmarkDumpAllThreadsUtilisation: Prints a JSON formatted
record of total and per-thread utilisation statistics about the system.
This currently includes a thread's total cycles scheduled, total number
of times scheduled, total cycles spent in the kernel and total number of
times entering the kernel and then totals of each for all threads on the
current core.
- seL4_BenchmarkResetAllThreadsUtilisation: Resets the current counts of
every user thread on the current core.
These syscalls are only available in a Debug build configuration as they
use a kernel debug list of all of the threads that exist for a given
node.
Signed-off-by: Kent McLeod <Kent.Mcleod@data61.csiro.au>
This register is visible to software executing at PL0 but not writeable.
Storing it in the VCPU context required custom save/restore handling as
it had to be explicitly handled when switching from a VCPU thread to a
non-VCPU thread so that it didn't become a channel. It is possible to
now update this register via seL4_TCB_WriteRegisters for software
executing at PL0.
This also fixes a bug where if a vcpu-thread is switched for a
non-vcpu-thread and then switched to a different vcpu-thread the
original vcpu-thread's copy of this register will get set to 0.
Signed-off-by: Kent McLeod <Kent.Mcleod@data61.csiro.au>
This field is unused and is never set to anything by the kernel. Other
architecture definitions of seL4_UserException_Msg contain an equivalent
field for a current-program-status-register-like register that the fault
handler can read and modify as part of fault handling. RISC-V's
equivalent register SSTATUS doesn't contain any fields that would be
useful for a fault handler to modify at this stage and so the register
isn't transferred in the fault.
Signed-off-by: Kent McLeod <Kent.Mcleod@data61.csiro.au>
This register is accessible from EL1 and affects whether Generic Timer
registers are accessible from EL0. When switching out of guests, the
kernel needs to restore the correct access for native threads.
Signed-off-by: Kent McLeod <Kent.Mcleod@data61.csiro.au>
Introduced a new config flag to enable
userError format strings to be written to the IPC buffer.
Another config bool has been introduced to toggle
printing the error out and this can also be set at runtime.
Signed-off-by: Saer Debel <saer.debel@data61.csiro.au>
This is the second commit for replacing ifndef with pargma
once in kernel header files. A few header files are missed
in the first round, hence this commit.
All the kernel header files now use pargma once rather than the ifndef,
as the pre-processed C files do not change while header files
are protected with pargma once. This will also solve any naming issues
caused by ifndef.
This commit also converts our own copyright headers to directly use
SPDX, but leaves all other copyright header intact, only adding the
SPDX ident. As far as possible this commit also merges multiple
Data61 copyright statements/headers into one for consistency.
Added constant definitions for the VMPIDR (arm32) and VMPIDR_EL2
(arm64) registers. These being vcpu registers that can be
written, read, saved and restored. The 'Virtualization Multiprocessor
ID Register' (VMPIDR) is needed to program a vcpu's affinity during
initialisation. This is currently only exposed on SMP configurations.
Co-authored-by: Anna Lyons <anna@gh.st>
