u-boot.git/drivers/xen/hypervisor.c, branch v2023.01

drivers: xen: unmap Enlighten page before jumping to Linux

2022-07-25T18:57:27Z

This commit fixes issue with usage of Xen hypervisor shared info page. Previously U-boot did not unmap it at the end of OS boot process. Xen did not prevent guest from this. So, it worked, but caused wierd issues - one memory page, that was returned by memalign in U-boot for Enlighten mapping was not unmaped by Xen (shared_info values was not removed from there) and returned to allocator. During the Linux boot, it uses shared_info page as regular RAM page, which leads to hypervisor shared info corruption. So, to fix this issue, as discussed on the xen-devel mailing list, the code should: 1) Unmap the page 2) Populate the area with memory using XENMEM_populate_physmap This patch adds page unmapping via XENMEM_remove_from_physmap, fills hole in address space where page was mapped via XENMEM_populate_physmap and return this address to memory allocator for freeing. Signed-off-by: Dmytro Firsov Reviewed-by: Anastasiia Lukianenko

common: board_r: Drop initr_xen wrapper

2021-01-15T19:36:12Z

Add a return value to xen_init and use it directly in the post-relocation init sequence, rather than using a wrapper stub. Signed-off-by: Ovidiu Panait Reviewed-by: Simon Glass

board: xen: De-initialize before jumping to Linux

2020-08-14T19:18:30Z

Free resources used by Xen board before jumping to Linux kernel. Signed-off-by: Oleksandr Andrushchenko Signed-off-by: Anastasiia Lukianenko Reviewed-by: Simon Glass

xen: Port Xen grant table driver from mini-os

2020-08-14T19:18:30Z

Make required updates to run on u-boot. Signed-off-by: Oleksandr Andrushchenko Signed-off-by: Anastasiia Lukianenko

xen: Port Xen bus driver from mini-os

2020-08-14T19:18:30Z

Make required updates to run on u-boot and strip test code. Signed-off-by: Anastasiia Lukianenko Signed-off-by: Oleksandr Andrushchenko

xen: Port Xen event channel driver from mini-os

2020-08-14T19:18:30Z

Make required updates to run on u-boot. Strip functionality not needed by U-boot. Signed-off-by: Oleksandr Andrushchenko Signed-off-by: Anastasiia Lukianenko

xen: Port Xen hypervisor related code from mini-os

2020-08-14T19:18:30Z

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 [1] - https://github.com/zyzii/mini-os.git Signed-off-by: Oleksandr Andrushchenko Signed-off-by: Anastasiia Lukianenko [trini: Drop wmb() from musb-net/linux-compat.h now] Signed-off-by: Tom Rini