The patch series introduces the following:
- the minimal set of headers and changes inside them.
- SBI (RISC-V Supervisor Binary Interface) things necessary for basic
  early_printk implementation.
- things needed to set up the stack.
- early_printk() function to print only strings.
- RISC-V smoke test which checks if  "Hello from C env" message is
  present in serial.tmp

The patch series is rebased on top of the patch "include/types: move
stddef.h-kind types to common header" [1]

[1] https://lore.kernel.org/xen-devel/5a0a9e2a-c116-21b5-8081-db75fe4178d7@suse.com/

---
Changes in V10:
 - Add changes mentioned in V9 (forget to do in previous version)
---
Changes in V9:
 - Bring "cmodel=medany" check back to be sure that C function is safe to be
   called in early boot when MMU is off ( e.g. VA != PA ) 
---
Changes in V8:
 - Set "needs: archlinux-current-gcc-riscv64-debug" in test.yaml
   for RISCV job as CONFIG_EARLY_PRINTK is available only when
   CONFIG_DEBUG is available.
---
Changes in V7:
 - Fix dependecy for qemu-smoke-riscv64-gcc job
---
Changes in V6:
 - Rename container name in test.yaml for .qemu-riscv64.
---
Changes in V5:
  - Nothing changed
---
Changes in V4:
  - Nothing changed
---
Changes in V3:
  - Nothing changed
  - All mentioned comments by Stefano in Xen mailing list will be
    fixed as a separate patch out of this patch series.
---

Oleksii Kurochko (2):
  xen/riscv: introduce early_printk basic stuff
  automation: add RISC-V smoke test

 automation/gitlab-ci/test.yaml            | 20 +++++++++++
 automation/scripts/qemu-smoke-riscv64.sh  | 20 +++++++++++
 xen/arch/riscv/Kconfig.debug              |  5 +++
 xen/arch/riscv/Makefile                   |  1 +
 xen/arch/riscv/early_printk.c             | 44 +++++++++++++++++++++++
 xen/arch/riscv/include/asm/early_printk.h | 12 +++++++
 xen/arch/riscv/setup.c                    |  4 +++
 7 files changed, 106 insertions(+)
 create mode 100755 automation/scripts/qemu-smoke-riscv64.sh
 create mode 100644 xen/arch/riscv/early_printk.c
 create mode 100644 xen/arch/riscv/include/asm/early_printk.h

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2.39.0