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path: root/drivers/xen
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2020-08-24xen: Code style conformityAnastasiia Lukianenko
Cleaning up the following: ERROR: do not use assignment in if condition #281: FILE: drivers/xen/pvblock.c:260: + if ((err = xenbus_switch_state(XBT_NIL, nodename, CHECK:COMPARISON_TO_NULL: Comparison to NULL could be written "err" #52: FILE: drivers/xen/pvblock.c:298: + if (err != NULL) { ERROR: do not use assignment in if condition #176: FILE: drivers/xen/gnttab.c:103: + if ((flags = nflags) & (GTF_reading | GTF_writing)) { WARNING: Missing or malformed SPDX-License-Identifier tag in line 1 #329: FILE: include/xen/gnttab.h:1: +/* WARNING: Misplaced SPDX-License-Identifier tag - use line 1 instead #330: FILE: include/xen/gnttab.h:2: + * SPDX-License-Identifier: GPL-2.0 ERROR: do not use assignment in if condition #630: FILE: lib/sscanf.c:558: + if ((n = inr) < width) { Signed-off-by: Anastasiia Lukianenko <anastasiia_lukianenko@epam.com> Reviewed-by: Simon Glass <sjg@chromium.org>
2020-08-14board: xen: De-initialize before jumping to LinuxOleksandr Andrushchenko
Free resources used by Xen board before jumping to Linux kernel. Signed-off-by: Oleksandr Andrushchenko <oleksandr_andrushchenko@epam.com> Signed-off-by: Anastasiia Lukianenko <anastasiia_lukianenko@epam.com> Reviewed-by: Simon Glass <sjg@chromium.org>
2020-08-14xen: pvblock: Print found devices indicesAnastasiia Lukianenko
Signed-off-by: Oleksandr Andrushchenko <oleksandr_andrushchenko@epam.com> Signed-off-by: Anastasiia Lukianenko <anastasiia_lukianenko@epam.com> Reviewed-by: Simon Glass <sjg@chromium.org>
2020-08-14xen: pvblock: Implement front-back protocol and do IOAnastasiia Lukianenko
Implement Xen para-virtual frontend to backend communication and actually read/write disk data. This is based on mini-os implementation of the para-virtual block frontend driver. Signed-off-by: Oleksandr Andrushchenko <oleksandr_andrushchenko@epam.com> Signed-off-by: Anastasiia Lukianenko <anastasiia_lukianenko@epam.com>
2020-08-14xen: pvblock: Read XenStore configuration and initializeAnastasiia Lukianenko
Read essential virtual block device configuration data from XenStore, initialize front ring and event channel. Update block device description with actual block size. Use code for XenStore from mini-os. Signed-off-by: Oleksandr Andrushchenko <oleksandr_andrushchenko@epam.com> Signed-off-by: Anastasiia Lukianenko <anastasiia_lukianenko@epam.com>
2020-08-14xen: pvblock: Enumerate virtual block devicesAnastasiia Lukianenko
Enumerate Xen virtual block devices found in XenStore and instantiate pvblock devices. Signed-off-by: Oleksandr Andrushchenko <oleksandr_andrushchenko@epam.com> Signed-off-by: Anastasiia Lukianenko <anastasiia_lukianenko@epam.com> Reviewed-by: Simon Glass <sjg@chromium.org>
2020-08-14xen: pvblock: Add initial support for para-virtualized block driverAnastasiia Lukianenko
Add initial infrastructure for Xen para-virtualized block device. This includes compile-time configuration and the skeleton for the future driver implementation. Add new class UCLASS_PVBLOCK which is going to be a parent for virtual block devices. Add new interface type IF_TYPE_PVBLOCK. Implement basic driver setup by reading XenStore configuration. Signed-off-by: Andrii Anisov <andrii_anisov@epam.com> Signed-off-by: Anastasiia Lukianenko <anastasiia_lukianenko@epam.com> Signed-off-by: Oleksandr Andrushchenko <oleksandr_andrushchenko@epam.com>
2020-08-14xen: Port Xen grant table driver from mini-osOleksandr Andrushchenko
Make required updates to run on u-boot. Signed-off-by: Oleksandr Andrushchenko <oleksandr_andrushchenko@epam.com> Signed-off-by: Anastasiia Lukianenko <anastasiia_lukianenko@epam.com>
2020-08-14xen: Port Xen bus driver from mini-osOleksandr Andrushchenko
Make required updates to run on u-boot and strip test code. Signed-off-by: Anastasiia Lukianenko <anastasiia_lukianenko@epam.com> Signed-off-by: Oleksandr Andrushchenko <oleksandr_andrushchenko@epam.com>
2020-08-14serial: serial_xen: Add Xen PV serial driverPeng Fan
Add support for Xen para-virtualized serial driver. This driver fully supports serial console for the virtual machine. Please note that as the driver is initialized late, so no banner nor memory size is visible. Signed-off-by: Peng Fan <peng.fan@nxp.com> Signed-off-by: Oleksandr Andrushchenko <oleksandr_andrushchenko@epam.com> Signed-off-by: Anastasiia Lukianenko <anastasiia_lukianenko@epam.com> Reviewed-by: Simon Glass <sjg@chromium.org>
2020-08-14xen: Port Xen event channel driver from mini-osOleksandr Andrushchenko
Make required updates to run on u-boot. Strip functionality not needed by U-boot. Signed-off-by: Oleksandr Andrushchenko <oleksandr_andrushchenko@epam.com> Signed-off-by: Anastasiia Lukianenko <anastasiia_lukianenko@epam.com>
2020-08-14xen: Port Xen hypervisor related code from mini-osOleksandr Andrushchenko
Port hypervisor related code from Mini-OS. This is referencing the code of Mini-OS from [1] by Huang Shijie and Volodymyr Babchuk which is for ARM64. Update essential arch code to support required bit operations, memory barriers etc. Copyright for the bits ported belong to at least the following authors, please see related files for details: Copyright (c) 2002-2003, K A Fraser Copyright (c) 2005, Grzegorz Milos, gm281@cam.ac.uk,Intel Research Cambridge Copyright (c) 2014, Karim Allah Ahmed <karim.allah.ahmed@gmail.com> [1] - https://github.com/zyzii/mini-os.git Signed-off-by: Oleksandr Andrushchenko <oleksandr_andrushchenko@epam.com> Signed-off-by: Anastasiia Lukianenko <anastasiia_lukianenko@epam.com> [trini: Drop wmb() from musb-net/linux-compat.h now] Signed-off-by: Tom Rini <trini@konsulko.com>
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