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* um/drivers: Kconfig: Fix indentationJuerg Haefliger2022-07-171-27/+27
| | | | | | | | | The convention for indentation seems to be a single tab. Help text is further indented by an additional two whitespaces. Fix the lines that violate these rules. Signed-off-by: Juerg Haefliger <juerg.haefliger@canonical.com> Signed-off-by: Richard Weinberger <richard@nod.at>
* um: daemon: Make default socket configurableJohannes Berg2022-05-271-0/+8
| | | | | | | | | | | | Even if daemon network is deprecated, some configurations may still use it (e.g. Debian), and not want to default to the /tmp/uml.ctl socket location. Allow configuring the default socket location. Signed-off-by: Johannes Berg <johannes.berg@intel.com> Acked-By: Anton Ivanov <anton.ivanov@cambridgegreys.com> Tested-by: Ritesh Raj Sarraf <ritesh@collabora.com> Signed-off-by: Richard Weinberger <richard@nod.at>
* um: xterm: Make default terminal emulator configurableJohannes Berg2022-05-271-0/+7
| | | | | | | | | | | Make the default terminal emulator configurable so e.g. Debian can set it to x-terminal-emulator instead of the current default of xterm. Signed-off-by: Johannes Berg <johannes.berg@intel.com> Acked-By: Anton Ivanov <anton.ivanov@cambridgegreys.com> Tested-by: Ritesh Raj Sarraf <ritesh@collabora.com> Signed-off-by: Richard Weinberger <richard@nod.at>
* um: add PCI over virtio emulation driverJohannes Berg2021-06-171-0/+20
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | 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 <johannes.berg@intel.com> Signed-off-by: Richard Weinberger <richard@nod.at>
* um: add a pseudo RTCJohannes Berg2021-02-121-0/+11
| | | | | | | | | | | | | | | | | | | Add a pseudo RTC that simply is able to send an alarm signal waking up the system at a given time in the future. Since apparently timerfd_create() FDs don't support SIGIO, we use the sigio-creating helper thread, which just learned to do suspend/resume properly in the previous patch. For time-travel mode, OTOH, just add an event at the specified time in the future, and that's already sufficient to wake up the system at that point in time since suspend will just be in an "endless wait". For s2idle support also call pm_system_wakeup(). Signed-off-by: Johannes Berg <johannes.berg@intel.com> Signed-off-by: Richard Weinberger <richard@nod.at>
* um: fix spelling mistake in Kconfig "privleges" -> "privileges"Colin Ian King2021-02-121-1/+1
| | | | | | | There is a spelling mistake in the Kconfig help text. Fix it. Signed-off-by: Colin Ian King <colin.king@canonical.com> Signed-off-by: Richard Weinberger <richard@nod.at>
* um: Allow static linking for non-glibc implementationsIgnat Korchagin2020-10-111-3/+3
| | | | | | | | | | | | | It is possible to produce a statically linked UML binary with UML_NET_VECTOR, UML_NET_VDE and UML_NET_PCAP options enabled using alternative libc implementations, which do not rely on NSS, such as musl. Allow static linking in this case. Signed-off-by: Ignat Korchagin <ignat@cloudflare.com> Reviewed-by: Brendan Higgins <brendanhiggins@google.com> Tested-by: Brendan Higgins <brendanhiggins@google.com> Signed-off-by: Richard Weinberger <richard@nod.at>
* um: Make CONFIG_STATIC_LINK actually staticBrendan Higgins2020-03-291-0/+3
| | | | | | | | | | | | | Currently, CONFIG_STATIC_LINK can be enabled with options which cannot be statically linked, namely UML_NET_VECTOR, UML_NET_VDE, and UML_NET_PCAP; this is because glibc tries to load NSS which does not support being statically linked. So make CONFIG_STATIC_LINK depend on !UML_NET_VECTOR && !UML_NET_VDE && !UML_NET_PCAP. Link: https://lore.kernel.org/lkml/f658f317-be54-ed75-8296-c373c2dcc697@cambridgegreys.com/#t Signed-off-by: Brendan Higgins <brendanhiggins@google.com> Acked-By: Anton Ivanov <anton.ivanov@cambridgegreys.com> Signed-off-by: Richard Weinberger <richard@nod.at>
* um: Mark non-vector net transports as obsoleteBrendan Higgins2020-01-191-40/+41
| | | | | | | | | | | | | | | | | | | | UML_NET_VECTOR now supports filters compiled with pcap outside of UML; it also supports: EoGRE, EoL2TPv3, RAW (+/- BPF), TAP and BESS. While vector drivers are not 1:1 replacements for the existing drivers, you can achieve the same topologies and the same connectivity at much higher performance (2.5 to 9 Gbit on mid-range Ryzen desktop) - the old drivers test out in the 500Mbit range on the same hardware. For all these reasons, the non-vector based transports are now unnecessary, and some, most notably pcap and vde are maintenance burdens. Thus, it makes sense to at least start thinking about removing the non-vector transports, so for now, mark them as obsolete. Link: https://lore.kernel.org/lkml/15f048d3-07ab-61c1-c6e0-0712e626dd33@cambridgegreys.com/T/#u Suggested-by: Anton Ivanov <anton.ivanov@cambridgegreys.com> Signed-off-by: Brendan Higgins <brendanhiggins@google.com> Signed-off-by: Richard Weinberger <richard@nod.at>
* um: virtio_uml: Disallow modular buildJohannes Berg2019-11-251-1/+1
| | | | | | | | | | | This driver *can* be a module, but then its parameters (socket path) are untrusted data from inside the VM, and that isn't allowed. Allow the code to only be built-in to avoid that. Fixes: 5d38f324993f ("um: drivers: Add virtio vhost-user driver") Signed-off-by: Johannes Berg <johannes.berg@intel.com> Acked-by: Anton Ivanov <anton.ivanov@cambridgegreys.co.uk> Signed-off-by: Richard Weinberger <richard@nod.at>
* um: drivers: Add virtio vhost-user driverErel Geron2019-09-151-0/+7
| | | | | | | | This module allows virtio devices to be used over a vhost-user socket. Signed-off-by: Erel Geron <erelx.geron@intel.com> Signed-off-by: Johannes Berg <johannes.berg@intel.com> Signed-off-by: Richard Weinberger <richard@nod.at>
* arch: um: drivers: Kconfig: pedantic formattingEnrico Weigelt, metux IT consult2019-05-071-176/+176
| | | | | | | | Formatting of Kconfig files doesn't look so pretty, so just take damp cloth and clean it up. Just indention changes. Signed-off-by: Enrico Weigelt, metux IT consult <info@metux.net> Signed-off-by: Richard Weinberger <richard@nod.at>
* um: create a proper drivers KconfigChristoph Hellwig2018-08-021-0/+337
Merge arch/um/Kconfig.char and arch/um/Kconfig.net into a new arch/um/drivers/Kconfig. This fits the way Kconfig files are placed elsewhere in the kernel tree. Signed-off-by: Christoph Hellwig <hch@lst.de> Acked-by: Richard Weinberger <richard@nod.at> Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
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