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3daa94ff2e
This commit contains features and buf fixes: * Catch errors during resource allocation * Because Mesa tries to allocate fence (hardware) registers for each batch buffer execution, do not allocate new fences for buffer objects that are already fenced * Add support for global hardware status page. Each context additionally has a per-process hardware status page, which we used to set the global hardware status page during Vgpu switch. This was obviously wrong. There is only one global hardware status page (set once during initialization) and a distinct per-process page for contexts. * Write the sequence number of the currently executing batch buffer to dword 52 of the per-process hardware status page. We use the pipe line command with QW_WRITE (quad word write), GLOBAL_GTT_IVB disabled (address space is per-process address space), and STORE_DATA_INDEX enabled (write goes to offset of hardware status page). This command used to write to the scratch page. But Linux now uses the first reserved word of the per-process hardware status page. * Add Gen9+ WaEnableGapsTsvCreditFix workaround. This sets the "GAPS TSV Credit fix Enable" bit of the Arbiter control register (GARBCNTLREG) as described by the documentation this bit should be set by the BIOS but is not on most Gen9/9.5 platforms. Not setting this bit leads to random GPU hangs. * Increase the context size from 20 to 22 pages for Gen9. On Gen8 the hardware context is 20 pages (1 hardware status page + 19 ring context register pages). On Gen9 the size of the ring context registers has increased by two pages to 21 pages or 81.3125 KBytes as the IGD documentation states. * The logical ring size in the ring buffer control of the execlist context has to be programmed with number of pages - 1. So 0 is 1 page. We programmed the actual number of pages before, leading to ring buffer execution of NOOPs if page behind our ring buffer was empty or GPU hangs if there was data on the page. issue #4260
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Genode source-code repositories
===============================
This directory contains the source-code repositories of the Genode OS
Framework. Each sub directory has the same principle layout as described in the
build-system manual:
:Build-system manual:
[https://genode.org/documentation/developer-resources/build_system]
The build system uses a configurable selection of those reposities to obtain
the source codes for the build process. The repositories are not independent
but build upon of each other:
:'base':
This directory contains the source-code repository of the fundamental
frameworks and interfaces of Genode. Furthermore, it contains the generic
parts of core.
:'base-<platform>':
These directories contain platform-specific source-code repositories
complementing the 'base' repository. The following platforms are supported:
:'linux':
Linux kernel (both x86_32 and x86_64)
:'nova':
NOVA hypervisor developed at University of Technology Dresden
:'foc':
Fiasco.OC is a modernized version of the Fiasco microkernel with a
completely revised kernel interface fostering capability-based
security. It is not compatible with L4/Fiasco.
:'hw':
The hw platform allows the execution of Genode on bare ARM and x86 hardware
without the need for a separate kernel. The kernel functionality is
included in core.
:'okl4':
OKL4 kernel (x86_32 and ARM) developed at Open-Kernel-Labs.
:'pistachio':
L4ka::Pistachio kernel developed at University of Karlsruhe.
:'fiasco':
L4/Fiasco kernel developed at University of Technology Dresden.
:'sel4':
seL4 microkernel developed at NICTA/General Dynamics
See[https://sel4.systems/]
:'os':
This directory contains the non-base OS components such as the init process,
device drivers, and basic system services.
:'demo':
This directory contains the source-code repository of various services and
applications that we use for demonstration purposes. For example, a graphical
application launcher called Launchpad and the Scout tutorial browser.
:'hello_tutorial':
Tutorial for creating a simple client-server scenario with Genode. This
repository includes documentation and the complete source code.
:'libports':
This source-code repository contains ports of popular open-source libraries
to Genode, most importantly the C library. The repository contains no
upstream source code but means to download the code and adapt it to Genode.
For instructions about how to use this mechanism, please consult the README
file at the top level of the repository. Among the 3rd-party libraries
are Qt5, libSDL, freetype, Python, ncurses, Mesa, and libav.
:'dde_linux':
This source-code repository contains the device driver environment for
executing Linux device drivers natively on Genode. Currently, this
repository hosts the USB stack.
:'dde_ipxe':
This source-code repository contains the device-driver environment for
executing drivers of the iPXE project.
:'dde_bsd':
This source-code repository contains the device-driver environment for
drivers of the OpenBSD operating system.
:'dde_rump':
This source-code repository contains the port of rump kernels, which are
used to execute subsystems of the NetBSD kernel as user level processes.
The repository contains a server that uses a rump kernel to provide
various NetBSD file systems to Genode.
:'ports':
This source-code repository hosts ports of 3rd-party applications to
Genode. The repository does not contain upstream source code but provides
a mechanism for downloading the official source distributions and adapt
them to the Genode environment. The used mechanism is roughly the same
as used for the 'libports' repository. Please consult 'libports/README'
for further information.
:'gems':
This source-code repository contains Genode applications that use
both native Genode interfaces as well as features of other high-level
repositories, in particular shared libraries provided by 'libports'.