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Re: [PATCH v5 0/2] Minimal build for RISCV

Sigh.. lets try this again with the version numbers in sync

On 6/2/21 5:20 PM, Connor Davis wrote:
Hi all,

This series introduces a minimal build for RISCV. It is based on Bobby's
previous work from last year[0] rebased onto current Xen.

This series provides the patches necessary to get a minimal build
working. The build is "minimal" in the sense that it only supports
building TARGET=riscv64/head.o. The arch/riscv/riscv64/head.S is just
a simple while(1).

The first patch is a mod to non-RISCV bits that enable building a
config with !CONFIG_HAS_NS16550.

The second patch adds the make/Kconfig boilerplate alongside head.S and
asm-riscv/config.h (head.S references ENTRY that is defined in



Changes since v5:
   - Added missing A-by from Jan to patch 1

Changes since v4:
   - Dropped patches 2 and 4 as these have been applied
   - Moved arch/riscv/head.S to arch/riscv/riscv64/head.S for consistency
     with ARM.
   - Added Bob and myself to MAINTAINERS

Changes since v3:
   - Dropped "xen: Fix build when !CONFIG_GRANT_TABLE" since this was
     applied by Jan
   - Adjusted Kconfig condition for building NS16550
   - Use bool rather than bool_t
   - Removed riscv memory map, as this should probably be done later once
     the frametable size is figured out
   - Consolidated 64-bit #defines in asm-riscv/config.h
   - Renamed riscv64_defconfig to tiny64_defconfig, added CONFIG_DEBUG
   - Fixed logic/alignment/whitespace issues in Kconfig files
   - Use upstream archlinux riscv64 cross-compiler packages instead of
     custom built toolchain in docker container

Changes since v2:
   - Reduced number of riscv files added to ease review

Changes since v1:
   - Dropped "xen/sched: Fix build when NR_CPUS == 1" since this was
     fixed for 4.15
   - Moved #ifdef-ary around iommu_enabled to iommu.h
   - Moved struct grant_table declaration above ifdef CONFIG_GRANT_TABLE
     instead of defining an empty struct when !CONFIG_GRANT_TABLE
Connor Davis (2):
   xen/char: Default HAS_NS16550 to y only for X86 and ARM
   xen: Add files needed for minimal riscv build

  MAINTAINERS                             |  8 +++++
  config/riscv64.mk                       |  5 +++
  xen/Makefile                            |  8 +++--
  xen/arch/riscv/Kconfig                  | 47 +++++++++++++++++++++++++
  xen/arch/riscv/Kconfig.debug            |  0
  xen/arch/riscv/Makefile                 |  2 ++
  xen/arch/riscv/Rules.mk                 |  0
  xen/arch/riscv/arch.mk                  | 14 ++++++++
  xen/arch/riscv/configs/tiny64_defconfig | 13 +++++++
  xen/arch/riscv/riscv64/asm-offsets.c    |  0
  xen/arch/riscv/riscv64/head.S           |  6 ++++
  xen/drivers/char/Kconfig                |  1 +
  xen/include/asm-riscv/config.h          | 47 +++++++++++++++++++++++++
  13 files changed, 149 insertions(+), 2 deletions(-)
  create mode 100644 config/riscv64.mk
  create mode 100644 xen/arch/riscv/Kconfig
  create mode 100644 xen/arch/riscv/Kconfig.debug
  create mode 100644 xen/arch/riscv/Makefile
  create mode 100644 xen/arch/riscv/Rules.mk
  create mode 100644 xen/arch/riscv/arch.mk
  create mode 100644 xen/arch/riscv/configs/tiny64_defconfig
  create mode 100644 xen/arch/riscv/riscv64/asm-offsets.c
  create mode 100644 xen/arch/riscv/riscv64/head.S
  create mode 100644 xen/include/asm-riscv/config.h



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