[GIT PULL] RISC-V updates for v7.1-rc4

[Paul Walmsley <pjw@kernel.org>]

Linus,

Please pull these fixes for v7.1-rc4.  These are relatively low-impact 
fixes.  Probably the most notable one is that we no longer ask the 
monitor-mode firmware to delegate misaligned access handling to the kernel 
by default, since the kernel code needs significant improvement to match 
the functionality of the firmware.  This change avoids functional problems 
at some cost in performance, but shouldn't affect any system with 
misaligned access handling in hardware.


thanks,

- Paul

The following changes since commit 254f49634ee16a731174d2ae34bc50bd5f45e731:

  Linux 7.1-rc1 (2026-04-26 14:19:00 -0700)

are available in the Git repository at:

  git://git.kernel.org/pub/scm/linux/kernel/git/riscv/linux tags/riscv-for-linus-7.1-rc4

for you to fetch changes up to b69bcb13ed7024a84d6cd8ad330f1e32782fcf28:

  riscv: misaligned: Make enabling delegation depend on NONPORTABLE (2026-05-13 22:26:32 -0600)

----------------------------------------------------------------
RISC-V updates for v7.1-rc4

- Disable satp register probing when no5lvl is specified on the kernel
  command line

- Fix a CFI-related issue with the misaligned access speed measurement
  code

- Reduce the CFI shadow stack size limit from 4GB to 2GB (following
  ARM64 GCS)

- Prevent the kernel from requesting delegation of misaligned access
  faults unless a new Kconfig option,
  CONFIG_RISCV_SBI_FWFT_DELEGATE_MISALIGNED, is enabled.  This will
  depend on CONFIG_NONPORTABLE until the deficiencies of the kernel
  misaligned access fixup code are fixed

- Fix some potential uninitialized memory accesses in error paths in
  compat_riscv_gpr_set() and compat_restore_sigcontext()

- Fix a bug in the RISC-V MIPS vendor errata patching code where a
  logical-and was used in place of a bitwise-and

- Drop some unnecessary code in riscv_fill_hwcap_from_isa_string()

- Use macros for isa2hwcap indices in riscv_fill_hwcap(), rather than
  open-coding them

- Fix some documentation typos (one affecting "make htmldocs")

----------------------------------------------------------------
Avi Radinsky (1):
      Documentation: riscv: cmodx: fix typos

Guo Ren (Alibaba DAMO Academy) (1):
      riscv: mm: Fixup no5lvl failure when vaddr is invalid

Hui Wang (2):
      riscv: cpufeature: Drop this_hwcap clear in T-Head vector workaround
      riscv: cpufeature: Use pre-defined ISA ext macros to index isa2hwcap

Michael Neuling (2):
      riscv: errata: Fix bitwise vs logical AND in MIPS errata patching
      riscv: Fix register corruption from uninitialized cregs on error

Nathan Chancellor (1):
      riscv: Define __riscv_copy_{,vec_}{words,bytes}_unaligned() using SYM_TYPED_FUNC_START

Randy Dunlap (1):
      riscv: Docs: fix unmatched quote warning

Vivian Wang (1):
      riscv: misaligned: Make enabling delegation depend on NONPORTABLE

Zong Li (1):
      riscv: cfi: reduce shadow stack size limit from 4GB to 2GB

 Documentation/arch/riscv/cmodx.rst     |  8 ++++----
 Documentation/arch/riscv/zicfilp.rst   |  2 +-
 arch/riscv/Kconfig                     | 22 ++++++++++++++++++++++
 arch/riscv/errata/mips/errata.c        |  2 +-
 arch/riscv/kernel/compat_signal.c      |  2 ++
 arch/riscv/kernel/copy-unaligned.S     |  5 +++--
 arch/riscv/kernel/cpufeature.c         | 20 +++++++++-----------
 arch/riscv/kernel/ptrace.c             |  4 ++--
 arch/riscv/kernel/traps_misaligned.c   |  2 +-
 arch/riscv/kernel/usercfi.c            |  7 ++++---
 arch/riscv/kernel/vec-copy-unaligned.S |  5 +++--
 arch/riscv/mm/init.c                   | 25 +++++++++++++++++++++++++
 12 files changed, 77 insertions(+), 27 deletions(-)

vmlinux size differences in bytes (from 254f49634ee1):
 text  data  bss    dec   hex  filename                             
 -112   +32    .    -80   -50  vmlinux.defconfig.gcc-15             
 -100   +32    .    -68   -44  vmlinux.nosmp_defconfig.gcc-15       
 -124   -32    .   -156   -9c  vmlinux.rv32_defconfig.gcc-15        
 -116     .    .   -116   -74  vmlinux.rv32_nosmp_defconfig.gcc-15  
  -20   +64    .    +44   +2c  vmlinux.nommu_virt_defconfig.gcc-15  
  -44   -64    .   -108   -6c  vmlinux.defconfig.clang-20           
  -36   -32    .    -68   -44  vmlinux.nosmp_defconfig.clang-20     
 -108   +32    .    -76   -4c  vmlinux.rv32_defconfig.clang-20      
 -108   -32    .   -140   -8c  vmlinux.rv32_nosmp_defconfig.clang-20
   -4     .    .     -4    -4  vmlinux.nommu_virt_defconfig.clang-20
  -64   -32    .    -96   -60  vmlinux.defconfig.gcc-14             
  -72   -32    .   -104   -68  vmlinux.nosmp_defconfig.gcc-14       
 -120   +32    .    -88   -58  vmlinux.rv32_defconfig.gcc-14        
 -116   +32    .    -84   -54  vmlinux.rv32_nosmp_defconfig.gcc-14  
  -20  +256    .   +236   +ec  vmlinux.nommu_virt_defconfig.gcc-14  
  -32   -32    .    -64   -40  vmlinux.defconfig.clang-19           
  -32   +32    .      .     .  vmlinux.nosmp_defconfig.clang-19     
 -108   +32    .    -76   -4c  vmlinux.rv32_defconfig.clang-19      
 -108   +32    .    -76   -4c  vmlinux.rv32_nosmp_defconfig.clang-19
   -4   +64    .    +60   +3c  vmlinux.nommu_virt_defconfig.clang-19
  -68   +32    .    -36   -24  vmlinux.defconfig.gcc-13             
  -60   +32    .    -28   -1c  vmlinux.nosmp_defconfig.gcc-13       
 -132   +32    .   -100   -64  vmlinux.rv32_defconfig.gcc-13        
 -124   +32    .    -92   -5c  vmlinux.rv32_nosmp_defconfig.gcc-13  
  -20  +256    .   +236   +ec  vmlinux.nommu_virt_defconfig.gcc-13  
  -32   -32    .    -64   -40  vmlinux.defconfig.clang-18           
  -28   +32    .     +4    +4  vmlinux.nosmp_defconfig.clang-18     
 -108   +32    .    -76   -4c  vmlinux.rv32_defconfig.clang-18      
 -108   -32    .   -140   -8c  vmlinux.rv32_nosmp_defconfig.clang-18
   -4   +64    .    +60   +3c  vmlinux.nommu_virt_defconfig.clang-18
  -88   -32    .   -120   -78  vmlinux.defconfig.gcc-12             
  -72   -32    .   -104   -68  vmlinux.nosmp_defconfig.gcc-12       
 -136   +32    .   -104   -68  vmlinux.rv32_defconfig.gcc-12        
 -112   +32    .    -80   -50  vmlinux.rv32_nosmp_defconfig.gcc-12  
  -16  +320    .   +304  +130  vmlinux.nommu_virt_defconfig.gcc-12  
  +16   -32    .    -16   -10  vmlinux.defconfig.clang-17           
  +16   +32    .    +48   +30  vmlinux.nosmp_defconfig.clang-17     
 -104   +32    .    -72   -48  vmlinux.rv32_defconfig.clang-17      
 -108   +32    .    -76   -4c  vmlinux.rv32_nosmp_defconfig.clang-17
   -4   +64    .    +60   +3c  vmlinux.nommu_virt_defconfig.clang-17
  -56   -32    .    -88   -58  vmlinux.defconfig.gcc-11             
  -48   -64    .   -112   -70  vmlinux.nosmp_defconfig.gcc-11       
 -136   +32    .   -104   -68  vmlinux.rv32_defconfig.gcc-11        
 -112   +32    .    -80   -50  vmlinux.rv32_nosmp_defconfig.gcc-11  
  -16  +256    .   +240   +f0  vmlinux.nommu_virt_defconfig.gcc-11  
  -48   -96    .   -144   -90  vmlinux.allnoconfig.gcc-14           
  +64     .    .    +64   +40  vmlinux.allmodconfig.gcc-14          
  -48   -96    .   -144   -90  vmlinux.allnoconfig.clang-19         
-1200     .   -8  -1208  -4b8  vmlinux.allmodconfig.clang-19