[GIT PULL] RISC-V Patches for the 6.15 Merge Window, Part 2

[Alexandre Ghiti]

The following changes since commit 
74f4bf9d15ad1d6862b828d486ed10ea0e874a23:

   Merge patch series "riscv: Add runtime constant support" (2025-03-20 
09:15:04 +0000)

are available in the Git repository at:

   git://git.kernel.org/pub/scm/linux/kernel/git/alexghiti/linux 
tags/riscv-mw2-6.15-rc1

for you to fetch changes up to 6ee928185aeb0ff085c73ae2ee163d436eba8352:

   riscv: Add norvc after .option arch in runtime const (2025-04-01 
07:09:21 +0000)

----------------------------------------------------------------
riscv patches for 6.15-rc1, part 2

* A bunch of fixes:
   - 2 fixes in the purgatory code which prevented kexec to work
   - Workaround an issue with gcc-15

----------------------------------------------------------------

All the patches have been tested on our github CI and no regressions 
were found against 6.14-rc7 
(https://github.com/linux-riscv/linux/pull/215/checks whose results can 
be seen here 
https://mazarinen.tail1c623.ts.net/riscv-linux/linux-all/build/v6.14-rc7-64-g6ee928185aeb/).

Please note that there is a bad merge between commit 2f4ab3ac10e1 ("mm: 
support tlbbatch flush for a range of PTEs") and commit d9be2b9b60497a 
("riscv: Call secondary mmu notifier when flushing the tlb") in 
next-20250402 as reported here 
https://lore.kernel.org/linux-riscv/CA+G9fYug_77HoqyonvsnJiya2q+0-hf9k4Yjk_dDn7P91Sq+3A@mail.gmail.com/T/#u. 
The correct resolution is:

diff --git a/arch/riscv/mm/tlbflush.c b/arch/riscv/mm/tlbflush.c
index c25a40aa2fe05..c22d5eb2b1851 100644
--- a/arch/riscv/mm/tlbflush.c
+++ b/arch/riscv/mm/tlbflush.c
@@ -192,10 +192,9 @@ bool arch_tlbbatch_should_defer(struct mm_struct *mm)
  void arch_tlbbatch_add_pending(struct arch_tlbflush_unmap_batch *batch,
                 struct mm_struct *mm, unsigned long start, unsigned 
long end)
  {
-       unsigned long start = uaddr & PAGE_MASK;
-
         cpumask_or(&batch->cpumask, &batch->cpumask, mm_cpumask(mm));
-       mmu_notifier_arch_invalidate_secondary_tlbs(mm, start, start + 
PAGE_SIZE);
+       mmu_notifier_arch_invalidate_secondary_tlbs(mm, start & PAGE_MASK,
+                                                   (end & PAGE_MASK) + 
PAGE_SIZE);
  }

  void arch_flush_tlb_batched_pending(struct mm_struct *mm)

----------------------------------------------------------------
Alexandre Ghiti (3):
       riscv: Fix hugetlb retrieval of number of ptes in case of 
!present pte
       Merge patch series "Add some validation for vector, vector crypto 
and fp stuff"
       riscv: Make sure toolchain supports zba before using zba 
instructions

Björn Töpel (1):
       riscv/purgatory: 4B align purgatory_start

Charlie Jenkins (1):
       riscv: Add norvc after .option arch in runtime const

Conor Dooley (6):
       RISC-V: add vector extension validation checks
       RISC-V: add vector crypto extension validation checks
       RISC-V: add f & d extension validation checks
       dt-bindings: riscv: d requires f
       dt-bindings: riscv: add vector sub-extension dependencies
       dt-bindings: riscv: document vector crypto requirements

Ignacio Encinas (1):
       selftests: riscv: fix v_exec_initval_nolibc.c

Yao Zi (1):
       riscv/kexec_file: Handle R_RISCV_64 in purgatory relocator

Yunhui Cui (1):
       riscv: print hartid on bringup

  .../devicetree/bindings/riscv/extensions.yaml     |  85 +++++++++++
  arch/riscv/Kconfig                                |   8 ++
  arch/riscv/include/asm/cpufeature.h               |   3 +
  arch/riscv/include/asm/runtime-const.h            |   7 +-
  arch/riscv/kernel/cpufeature.c                    | 143 
+++++++++++++------
  arch/riscv/kernel/elf_kexec.c                     |   3 +
  arch/riscv/kernel/smp.c                           |   2 +
  arch/riscv/kernel/smpboot.c                       |   4 +
  arch/riscv/mm/hugetlbpage.c                       |  76 ++++++----
  arch/riscv/purgatory/entry.S                      |   1 +
  .../riscv/vector/v_exec_initval_nolibc.c          |  10 +-
  11 files changed, 262 insertions(+), 80 deletions(-)