linux-dev/arch/um/kernel/Makefile, branch master

um: Add devicetree support

2021-12-22T19:35:01Z

Add a dtb= option to boot UML with a devicetree blob. This can be used for testing driver code using UML. Signed-off-by: Vincent Whitchurch [rw: Add dependency on CONFIG_OF] Signed-off-by: Richard Weinberger

um: Extract load file helper from initrd.c

2021-12-22T19:32:36Z

The file loading support in initrd.c can be re-used for loading devicetrees. Move it out of initrd.c. Signed-off-by: Vincent Whitchurch Signed-off-by: Richard Weinberger

um: move amd64 variant of mmap(2) to arch/x86/um/syscalls_64.c

2021-12-21T20:30:44Z

Signed-off-by: Al Viro Signed-off-by: Richard Weinberger

um: Add support for host CPU flags and alignment

2021-06-17T20:01:26Z

1. Reflect host cpu flags into the UML instance so they can be used to select the correct implementations for xor, crypto, etc. 2. Reflect host cache alignment into UML instance. This is important when running 32 bit on a 64 bit host as 32 bit by default aligns to 32 while the actual alignment should be 64. Ditto for some Xeons which align at 128. Signed-off-by: Anton Ivanov Signed-off-by: Richard Weinberger

um: add PCI over virtio emulation driver

2021-06-17T19:45:43Z

To support testing of PCI/PCIe drivers in UML, add a PCI bus support driver. This driver uses virtio, which in UML is really just vhost-user, to talk to devices, and adds the devices to the virtual PCI bus in the system. Since virtio already allows DMA/bus mastering this really isn't all that hard, of course we need the logic_iomem infrastructure that was added by a previous patch. The protocol to talk to the device is has a few fairly simple messages for reading to/writing from config and IO spaces, and messages for the device to send the various interrupts (INT#, MSI/MSI-X and while suspended PME#). Note that currently no offical virtio device ID is assigned for this protocol, as a consequence this patch requires defining it in the Kconfig, with a default that makes the driver refuse to work at all. Finally, in order to add support for MSI/MSI-X interrupts, some small changes are needed in the UML IRQ code, it needs to have more interrupts, changing NR_IRQS from 64 to 128 if this driver is enabled, but not actually use them for anything so that the generic IRQ domain/MSI infrastructure can allocate IRQ numbers. Signed-off-by: Johannes Berg Signed-off-by: Richard Weinberger

um: Disable CONFIG_GCOV with MODULES

2021-04-15T21:10:33Z

CONFIG_GCOV doesn't work with modules, and for various reasons it cannot work, see also https://lore.kernel.org/r/d36ea54d8c0a8dd706826ba844a6f27691f45d55.camel@sipsolutions.net Make CONFIG_GCOV depend on !MODULES to avoid anyone running into issues there. This also means we need not export the gcov symbols. Signed-off-by: Johannes Berg Signed-off-by: Richard Weinberger

um: Add SPDX headers to files in arch/um/kernel/

2019-09-15T19:37:17Z

Convert files to use SPDX header. All files are licensed under the GPLv2. Signed-off-by: Alex Dewar Signed-off-by: Richard Weinberger

um: Remove meaningless clearing of clean-files

2019-09-15T19:37:08Z

Signed-off-by: Masahiro Yamada Signed-off-by: Richard Weinberger

um: Support kcov

2016-08-03T22:18:06Z

This adds support for kcov to UML. There is a small problem where UML will randomly segfault during boot; this is because current_thread_info() occasionally returns an invalid (non-NULL) pointer and we try to dereference it in __sanitizer_cov_trace_pc(). I consider this a bug in UML itself and this patch merely exposes it. [v2: disable instrumentation in UML-specific code] Cc: Quentin Casasnovas Cc: Richard Weinberger Cc: Thomas Meyer Cc: user-mode-linux-devel Cc: Dmitry Vyukov Signed-off-by: Vegard Nossum Signed-off-by: Richard Weinberger

um: add a kmsg_dumper

2015-04-13T19:17:37Z

Add a kmsg_dumper, that dumps the kmsg buffer to stdout, when no console is available. This an enables the printing of early panic() calls triggered in uml_postsetup(). When a panic() call happens so early in the UML kernel no earlyprintk/console is available yet, but with a kmsg_dumper in place the kernel message buffer will be outputted to the user, to give a better hint, of what the failure was. Signed-off-by: Thomas Meyer Signed-off-by: Richard Weinberger