[GIT PULL] RISC-V Patches for the 6.8 Merge Window, Part 4

[Palmer Dabbelt <palmer@rivosinc.com>]

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The following changes since commit cb51bfee7f62a8e26b694f9d84c0041b3e3ccc71:

  Merge patch series "riscv: hwprobe: add Zicond, Zacas and Ztso support" (2024-01-09 20:14:51 -0800)

are available in the Git repository at:

  git://git.kernel.org/pub/scm/linux/kernel/git/riscv/linux.git tags/riscv-for-linus-6.8-mw4

for you to fetch changes up to f24a70106dc1ad2a755b2d42f47cf1dcf24f0b27:

  lib: checksum: Fix build with CONFIG_NET=n (2024-01-19 08:12:38 -0800)

----------------------------------------------------------------
RISC-V Patches for the 6.8 Merge Window, Part 4

This includes everything from part 2:

* Support for tuning for systems with fast misaligned accesses.
* Support for SBI-based suspend.
* Support for the new SBI debug console extension.
* The T-Head CMOs now use PA-based flushes.
* Support for enabling the V extension in kernel code.
* Optimized IP checksum routines.
* Various ftrace improvements.
* Support for archrandom, which depends on the Zkr extension.

and then also a fix for those:

* The build is no longer broken under NET=n, KUNIT=y for ports that
  don't define their own ipv6 checksum.

----------------------------------------------------------------
This is essentially the same as part 3, except it doesn't have the back merge.
Thus there's a semantic merge conflict: the refactoring from f32fcbedbe92
("tty: hvc: convert to u8 and size_t") requires a change to 88ead68e764c ("tty:
Add SBI debug console support to HVC SBI driver") as we added another set of
HVC routines.

I used the following locally

diff --git a/drivers/tty/hvc/hvc_riscv_sbi.c b/drivers/tty/hvc/hvc_riscv_sbi.c
index 0abd964d380b..cede8a572594 100644
--- a/drivers/tty/hvc/hvc_riscv_sbi.c
+++ b/drivers/tty/hvc/hvc_riscv_sbi.c
@@ -45,12 +45,12 @@ static const struct hv_ops hvc_sbi_v01_ops = {
 	.put_chars = hvc_sbi_tty_put,
 };
 
-static int hvc_sbi_dbcn_tty_put(uint32_t vtermno, const char *buf, int count)
+static ssize_t hvc_sbi_dbcn_tty_put(uint32_t vtermno, const u8 *buf, size_t count)
 {
 	return sbi_debug_console_write(buf, count);
 }
 
-static int hvc_sbi_dbcn_tty_get(uint32_t vtermno, char *buf, int count)
+static ssize_t hvc_sbi_dbcn_tty_get(uint32_t vtermno, u8 *buf, size_t count)
 {
 	return sbi_debug_console_read(buf, count);
 }

to avoid a local build failure along the lines of

  CC      drivers/tty/hvc/hvc_riscv_sbi.o
drivers/tty/hvc/hvc_riscv_sbi.c:59:22: error: initialization of ‘ssize_t (*)(uint32_t,  const u8 *, size_t)’ {aka ‘long int (*)(unsigned int,  const unsigned char *, long unsigned int)’} from incompatible pointer type ‘int (*)(uint32_t,  const char *, int)’ {aka ‘int (*)(unsigned int,  const char *, int)’} [-Werror=incompatible-pointer-types]
   59 |         .put_chars = hvc_sbi_dbcn_tty_put,
      |                      ^~~~~~~~~~~~~~~~~~~~
drivers/tty/hvc/hvc_riscv_sbi.c:59:22: note: (near initialization for ‘hvc_sbi_dbcn_ops.put_chars’)
drivers/tty/hvc/hvc_riscv_sbi.c:60:22: error: initialization of ‘ssize_t (*)(uint32_t,  u8 *, size_t)’ {aka ‘long int (*)(unsigned int,  unsigned char *, long unsigned int)’} from incompatible pointer type ‘int (*)(uint32_t,  char *, int)’ {aka ‘int (*)(unsigned int,  char *, int)’} [-Werror=incompatible-pointer-types]
   60 |         .get_chars = hvc_sbi_dbcn_tty_get,
      |                      ^~~~~~~~~~~~~~~~~~~~
drivers/tty/hvc/hvc_riscv_sbi.c:60:22: note: (near initialization for ‘hvc_sbi_dbcn_ops.get_chars’)

----------------------------------------------------------------
Alexandre Ghiti (3):
      riscv: Use hugepage mappings for vmemmap
      riscv: Add support for BATCHED_UNMAP_TLB_FLUSH
      riscv: Fix build error on rv32 + XIP

Andrew Jones (2):
      riscv: sbi: Introduce system suspend support
      RISC-V: selftests: cbo: Ensure asm operands match constraints

Andy Chiu (8):
      riscv: vector: make Vector always available for softirq context
      riscv: sched: defer restoring Vector context for user
      riscv: lib: vectorize copy_to_user/copy_from_user
      riscv: fpu: drop SR_SD bit checking
      riscv: vector: do not pass task_struct into riscv_v_vstate_{save,restore}()
      riscv: vector: use a mask to write vstate_ctrl
      riscv: vector: use kmem_cache to manage vector context
      riscv: vector: allow kernel-mode Vector with preemption

Anup Patel (4):
      RISC-V: Add stubs for sbi_console_putchar/getchar()
      RISC-V: Add SBI debug console helper routines
      tty/serial: Add RISC-V SBI debug console based earlycon
      RISC-V: Enable SBI based earlycon support

Atish Patra (1):
      tty: Add SBI debug console support to HVC SBI driver

Charlie Jenkins (9):
      riscv: Fix module loading free order
      riscv: Correctly free relocation hashtable on error
      riscv: Fix relocation_hashtable size
      asm-generic: Improve csum_fold
      riscv: Add static key for misaligned accesses
      riscv: Add checksum header
      riscv: Add checksum library
      kunit: Add tests for csum_ipv6_magic and ip_fast_csum
      riscv: lib: Check if output in asm goto supported

Christoph Müllner (5):
      tools: selftests: riscv: Fix compile warnings in hwprobe
      tools: selftests: riscv: Fix compile warnings in cbo
      tools: selftests: riscv: Add missing include for vector test
      tools: selftests: riscv: Fix compile warnings in vector tests
      tools: selftests: riscv: Fix compile warnings in mm tests

Christophe JAILLET (1):
      riscv: Fix an off-by-one in get_early_cmdline()

Conor Dooley (1):
      dt-bindings: riscv: permit numbers in "riscv,isa"

Daniel Henrique Barboza (1):
      dt-bindings: riscv: Document cbop-block-size

Greentime Hu (2):
      riscv: Add support for kernel mode vector
      riscv: Add vector extension XOR implementation

Guo Ren (2):
      riscv: mm: Fixup compat mode boot failure
      riscv: mm: Fixup compat arch_get_mmap_end

Jisheng Zhang (4):
      riscv: introduce RISCV_EFFICIENT_UNALIGNED_ACCESS
      riscv: select DCACHE_WORD_ACCESS for efficient unaligned access HW
      riscv: errata: thead: use riscv_nonstd_cache_ops for CMO
      riscv: errata: thead: use pa based instructions for CMO

Masahiro Yamada (1):
      riscv: add dependency among Image(.gz), loader(.bin), and vmlinuz.efi

Maxim Kochetkov (1):
      riscv: optimize ELF relocation function in riscv

Nathan Chancellor (3):
      riscv: Hoist linker relaxation disabling logic into Kconfig
      riscv: Restrict DWARF5 when building with LLVM to known working versions
      lib/Kconfig.debug: Update AS_HAS_NON_CONST_LEB128 comment and name

Palmer Dabbelt (11):
      Merge patch series "riscv: enable EFFICIENT_UNALIGNED_ACCESS and DCACHE_WORD_ACCESS"
      Merge patch series "riscv: modules: Fix module loading error handling"
      Merge patch series "RISC-V SBI debug console extension support"
      Merge patch series "riscv: errata: thead: use riscv_nonstd_cache_ops for CMO"
      Merge patch series "tools: selftests: riscv: Fix compiler warnings"
      Merge patch series "riscv: mm: Fixup & Optimize COMPAT code"
      Merge patch series "riscv: support kernel-mode Vector"
      Merge patch series "riscv: Add fine-tuned checksum functions"
      Merge patch series "RISC-V: Disable DWARF5 with known broken LLVM versions"
      Merge patch series "riscv: ftrace: Miscellaneous ftrace improvements"
      lib: checksum: Fix build with CONFIG_NET=n

Samuel Holland (1):
      dt-bindings: riscv: cpus: Clarify mmu-type interpretation

Samuel Ortiz (1):
      RISC-V: Implement archrandom when Zkr is available

Song Shuai (4):
      riscv: select FTRACE_MCOUNT_USE_PATCHABLE_FUNCTION_ENTRY
      riscv: ftrace: Make function graph use ftrace directly
      riscv: ftrace: Add DYNAMIC_FTRACE_WITH_DIRECT_CALLS support
      samples: ftrace: Add RISC-V support for SAMPLE_FTRACE_DIRECT[_MULTI]

Xiao Wang (1):
      riscv: Optimize hweight API with Zbb extension

 Documentation/devicetree/bindings/riscv/cpus.yaml  |   9 +-
 .../devicetree/bindings/riscv/extensions.yaml      |   2 +-
 Documentation/features/vm/TLB/arch-support.txt     |   2 +-
 arch/riscv/Kconfig                                 |  57 +++-
 arch/riscv/Kconfig.errata                          |   1 +
 arch/riscv/Makefile                                |   8 +-
 arch/riscv/configs/defconfig                       |   1 +
 arch/riscv/errata/thead/errata.c                   |  69 ++++-
 arch/riscv/include/asm/arch_hweight.h              |  78 +++++
 arch/riscv/include/asm/archrandom.h                |  72 +++++
 arch/riscv/include/asm/asm-extable.h               |  15 +
 arch/riscv/include/asm/asm-prototypes.h            |  27 ++
 arch/riscv/include/asm/bitops.h                    |   4 +-
 arch/riscv/include/asm/checksum.h                  |  93 ++++++
 arch/riscv/include/asm/cpufeature.h                |   2 +
 arch/riscv/include/asm/csr.h                       |   9 +
 arch/riscv/include/asm/entry-common.h              |  17 ++
 arch/riscv/include/asm/errata_list.h               |  50 +---
 arch/riscv/include/asm/ftrace.h                    |  18 +-
 arch/riscv/include/asm/pgtable.h                   |   2 +-
 arch/riscv/include/asm/processor.h                 |  43 ++-
 arch/riscv/include/asm/sbi.h                       |  19 ++
 arch/riscv/include/asm/simd.h                      |  64 ++++
 arch/riscv/include/asm/switch_to.h                 |   3 +-
 arch/riscv/include/asm/thread_info.h               |   2 +
 arch/riscv/include/asm/tlbbatch.h                  |  15 +
 arch/riscv/include/asm/tlbflush.h                  |   8 +
 arch/riscv/include/asm/vector.h                    |  90 +++++-
 arch/riscv/include/asm/word-at-a-time.h            |  27 ++
 arch/riscv/include/asm/xor.h                       |  68 +++++
 arch/riscv/kernel/Makefile                         |   1 +
 arch/riscv/kernel/cpufeature.c                     |  90 +++++-
 arch/riscv/kernel/entry.S                          |   8 +
 arch/riscv/kernel/ftrace.c                         |  30 +-
 arch/riscv/kernel/kernel_mode_vector.c             | 247 ++++++++++++++++
 arch/riscv/kernel/mcount-dyn.S                     | 198 ++++++++++---
 arch/riscv/kernel/module.c                         |  34 ++-
 arch/riscv/kernel/pi/cmdline_early.c               |   3 +-
 arch/riscv/kernel/process.c                        |  13 +-
 arch/riscv/kernel/ptrace.c                         |   7 +-
 arch/riscv/kernel/sbi.c                            |  66 +++++
 arch/riscv/kernel/signal.c                         |   7 +-
 arch/riscv/kernel/suspend.c                        |  44 +++
 arch/riscv/kernel/vector.c                         |  53 +++-
 arch/riscv/lib/Makefile                            |   6 +
 arch/riscv/lib/csum.c                              | 328 +++++++++++++++++++++
 arch/riscv/lib/riscv_v_helpers.c                   |  45 +++
 arch/riscv/lib/uaccess.S                           |  10 +
 arch/riscv/lib/uaccess_vector.S                    |  53 ++++
 arch/riscv/lib/xor.S                               |  81 +++++
 arch/riscv/mm/extable.c                            |  31 ++
 arch/riscv/mm/init.c                               |  25 +-
 arch/riscv/mm/tlbflush.c                           |  69 +++--
 drivers/tty/hvc/Kconfig                            |   2 +-
 drivers/tty/hvc/hvc_riscv_sbi.c                    |  37 ++-
 drivers/tty/serial/Kconfig                         |   2 +-
 drivers/tty/serial/earlycon-riscv-sbi.c            |  27 +-
 include/asm-generic/checksum.h                     |   6 +-
 lib/Kconfig.debug                                  |  12 +-
 lib/checksum_kunit.c                               | 286 +++++++++++++++++-
 samples/ftrace/ftrace-direct-modify.c              |  35 +++
 samples/ftrace/ftrace-direct-multi-modify.c        |  41 +++
 samples/ftrace/ftrace-direct-multi.c               |  25 ++
 samples/ftrace/ftrace-direct-too.c                 |  28 ++
 samples/ftrace/ftrace-direct.c                     |  24 ++
 tools/testing/selftests/riscv/hwprobe/cbo.c        |  24 +-
 tools/testing/selftests/riscv/hwprobe/hwprobe.c    |   4 +-
 tools/testing/selftests/riscv/mm/mmap_test.h       |   3 +
 .../selftests/riscv/vector/v_initval_nolibc.c      |   2 +-
 .../selftests/riscv/vector/vstate_exec_nolibc.c    |   3 +
 .../testing/selftests/riscv/vector/vstate_prctl.c  |   4 +-
 71 files changed, 2676 insertions(+), 213 deletions(-)
 create mode 100644 arch/riscv/include/asm/arch_hweight.h
 create mode 100644 arch/riscv/include/asm/archrandom.h
 create mode 100644 arch/riscv/include/asm/checksum.h
 create mode 100644 arch/riscv/include/asm/simd.h
 create mode 100644 arch/riscv/include/asm/tlbbatch.h
 create mode 100644 arch/riscv/include/asm/xor.h
 create mode 100644 arch/riscv/kernel/kernel_mode_vector.c
 create mode 100644 arch/riscv/lib/csum.c
 create mode 100644 arch/riscv/lib/riscv_v_helpers.c
 create mode 100644 arch/riscv/lib/uaccess_vector.S
 create mode 100644 arch/riscv/lib/xor.S


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