Until now, the lx_emul layer addressed a 5.11 Linux Kernel port,
now that we add new architectures it is better to update the default version
first. There are especially changes in the task_struct code,
and the signature of some functions in the paging subsystem changed.
Ref genodelabs/genode#4411
We use the architecture-specific setjmp/longjmp implementation without
modification in the newer lx_kit implementation as well. There is no
need for a duplication.
Ref genodelabs/genode#4411
This patch changes the 'Allocator' interface to the use of 'Attempt'
return values instead of using exceptions for propagating errors.
To largely uphold compatibility with components using the original
exception-based interface - in particluar use cases where an 'Allocator'
is passed to the 'new' operator - the traditional 'alloc' is still
supported. But it existes merely as a wrapper around the new
'try_alloc'.
Issue #4324
The Allocator_avl back end will display diagnostic messages if the
address to be freed is not at the beginning of a block. This happens
regulary when 'struct page' objects are not freed in allocation order.
Issue #4325.
Introduce a method to access the dataspace capability of the underlying
backing store for a memory allocation. This is necessary for drivers
where the memory is managed manually and the capability needs to be
given to a client.
Issue #4325.
This patch introduces the lx_emul/pin.h interface that enables GPIO stub
drivers to interact with Genode's Pin_control and IRQ sessions via a
simple C API.
Fixes#4316
To clearly identify the correct device use the unique device's name
not the type. Otherwise a driver cannot drive several devices of the
same type.
Fix#4297
* Use the architecture-dependent minimal alignment for all allocations,
e.g. on ARM it is necessary to have cacheline aligned allocations for DMA
* Remove the allocation functions without alignment from generic API
* Fix a warning
Fix#4268
After a DMA transaction do only invalidate cachelines from the
corresponding DMA buffers if data got transfered from device to
CPU, and not vice versa. Otherwise it might result in data corruption.
Ref #4268
The lx_emul_virt_to_pages implementation initialized the page ref
counter only for the first page, leaving the remaining elements in
uninitialized state. This, in turn, rendered the Linux page_pool (as
used by the emac network driver) ineffective, ultimately leading the a
memory leak. The fix changes the call of 'init_page_count' to take the
loop variable as argument.
Issue #4225
Driver code such as mfd-core.c may pass 0 as argument n to kcalloc,
which eventually results in an allocation size 0.
res = kcalloc(cell->num_resources, sizeof(*res), GFP_KERNEL);
Since 'res' is checked against NULL for success, kmalloc must not return
a NULL pointer in this case. The patch works around this issue by
forcing an allocation size of 1 byte in this case.
Issue #4253
Clock providers such as drivers/clk/sunxi-ng/ccu-sun8i-r.c don't use
regular init calls but declare their init functions via CLK_OF_DECLARE,
which fill the __clk_of_table. Linux populates the table statically by
using special sections declared in the linker script. In contrast, we
populate the table by expanding the macro to global constructor
functions.
The __clk_of_table is then processed by the call of of_clk_init(NULL).
Issue #4253
The re-newed approach currently supports ARM 64-bit only.
It depends on the Platform API of the ARM architecture.
It tries to meet the original semantic of the Linux kernel
functions as far as possible. To achieve this, device drivers
using this library should reference the original Linux kernel
headers at foremost. Only the headers in `src/include/lx_emul/shadow`
have to shadow clone the original ones.
Fix#4225
skb_push() already increases the skb->len by ETH_HLEN, hence adding
ETH_HLEN to the packet_size is redundant.
A too large packet size becomes a problem for large MTUs. With a maximum
MTU of 1500, adding ETH_HLEN twice will lead to a packet size of 1528.
Since this is larger than what we expect for good-old Ethernet (max. 1522),
some clients (e.g. the e1000 model in vbox5) may drop these packets.
Fixesgenodelabs/genode#4228
