| Message ID | 20250318233617.849903-1-dmukhin@ford.com (mailing list archive) |
|---|---|
| Headers | show |
| Series | xen/console: cleanup console input switch logic | expand |
On Tuesday, March 18th, 2025 at 4:36 PM, dmkhn@proton.me <dmkhn@proton.me> wrote: > > > Currently, on x86, console input can be rotated in round-robin manner > only between dom0, PV shim, and Xen itself. On Arm the input rotation > can include domUs with vpl011. > > The patch series introduces the concept of "console focus", which is > defined as the ID of the domain that currently owns the physical console > input. > > The patch series originates from the NS16550 UART emulator series [1] > for x86, which requires ability to switch physical console input to a > PVH/HVM domain with an emulated UART. > > The main idea is introducing a per-domain permission flag that is set > during domain initialization and used by the console driver to switch > the input across permitted domains. > > Patch 0 removes all the trailing white spaces in the console driver code. > > Patch 1 introduces a new domain permission flag to mark ownership of the > console input for the console driver. > > Patches 2-4 prepare console driver to allow console input rotation > across multiple domains based on the new permission flag. > > Patches 5-6 perform mechanical renames to fit the usage in the code. > > Patch 7 cleans up the console input switch logic. > > Patch 8 simplifies the existing vUART code by using newly introduced APIs. Corrected series explanation: Patch 1 removes all the trailing white spaces in the console driver code. Patch 2 introduces a new domain permission flag to mark ownership of the console input for the console driver. Patches 3, 4 prepare console driver to allow console input rotation across multiple domains based on the new permission flag. Patches 5, 6 perform mechanical renames to fit the usage in the code. Patch 7 cleans up the console input switch logic. Patch 8 simplifies the existing vUART code by using newly introduced APIs. > > CI: https://gitlab.com/xen-project/people/dmukhin/xen/-/pipelines/1723361248 > > [1]: https://lore.kernel.org/xen-devel/20250103-vuart-ns8250-v3-v1-0-c5d36b31d66c@ford.com/ > > Denis Mukhin (8): > xen/console: fix trailing whitespaces > xen/console: introduce console input permission > xen/domain: introduce domid_top > xen/domain: introduce domid_alloc() > xen/console: rename switch_serial_input() to console_switch_focus() > xen/console: rename console_rx to console_focus > xen/console: introduce console_set_focus() > xen/console: introduce console_get_focus() > > xen/arch/arm/dom0less-build.c | 15 ++- > xen/arch/arm/domain_build.c | 19 +++- > xen/arch/arm/include/asm/setup.h | 2 - > xen/arch/arm/setup.c | 2 - > xen/arch/arm/vpl011.c | 7 +- > xen/arch/ppc/include/asm/setup.h | 2 - > xen/arch/riscv/include/asm/setup.h | 2 - > xen/arch/x86/include/asm/setup.h | 2 - > xen/arch/x86/pv/shim.c | 2 + > xen/common/domain.c | 5 + > xen/common/domctl.c | 71 +++++++++------ > xen/common/kernel.c | 8 ++ > xen/drivers/char/console.c | 142 +++++++++++++++++------------ > xen/include/xen/console.h | 3 +- > xen/include/xen/domain.h | 5 + > xen/include/xen/sched.h | 8 +- > 16 files changed, 180 insertions(+), 115 deletions(-) > > -- > 2.34.1