[GIT PULL] RISC-V Patches for the 6.16 Merge Window, Part 1
Alexandre Ghiti
alex at ghiti.fr
Tue May 13 12:49:26 PDT 2025
Hi Palmer,
On 09/05/2025 10:28, Alexandre Ghiti wrote:
> The following changes since commit
> 9c32cda43eb78f78c73aee4aa344b777714e259b:
>
> Linux 6.15-rc3 (2025-04-20 13:43:47 -0700)
>
> are available in the Git repository at:
>
> git://git.kernel.org/pub/scm/linux/kernel/git/alexghiti/linux
> tags/riscv-mw1-6.16-rc1
>
> for you to fetch changes up to 135452d0c6114619fb954eaf9496210b5be0701d:
>
> riscv: Improve Kconfig help for RISCV_ISA_V_PREEMPTIVE (2025-05-09
> 06:35:10 +0000)
>
> ----------------------------------------------------------------
> riscv patches for 6.16-rc1
>
> * Implement atomic patching support for ftrace which finally allows to
> get rid of stop_machine()
> * Support for user_access_begin() to avoid toggling the SUM bit at
> each userspace access, improving the performance of our user copies
> * Support for kexec_file_load() syscall
> * Improve module loading time by changing the algorithm that counts
> the number of plt/got entries in a module
> * Zicbop is now used in the kernel to prefetch instructions
>
> ----------------------------------------------------------------
> Alexandre Ghiti (8):
> riscv: Add support for PUD THP
> Merge patch series "riscv: uaccess: optimisations"
> riscv: Introduce Zicbop instructions
> riscv: Add support for Zicbop
> Merge patch series "riscv: ftrace: atmoic patching and preempt
> improvements"
> Merge patch series "riscv: kexec_file: Support loading Image
> binary file"
> riscv: hwprobe: export Zabha extension
> Merge patch series "riscv: Add Zicbop & prefetchw support"
>
> Andy Chiu (11):
> riscv: ftrace: support fastcc in Clang for WITH_ARGS
> riscv: ftrace factor out code defined by !WITH_ARG
> riscv: ftrace: align patchable functions to 4 Byte boundary
> kernel: ftrace: export ftrace_sync_ipi
> riscv: ftrace: prepare ftrace for atomic code patching
> riscv: ftrace: do not use stop_machine to update code
> riscv: vector: Support calling schedule() for preemptible Vector
> riscv: add a data fence for CMODX in the kernel mode
> riscv: ftrace: support PREEMPT
> riscv: ftrace: support direct call using call_ops
> riscv: Documentation: add a description about dynamic ftrace
>
> Atish Patra (1):
> MAINTAINERS: Update Atish's email address
>
> Ben Dooks (1):
> riscv: save the SR_SUM status over switches
>
> Guo Ren (2):
> riscv: Add ARCH_HAS_PREFETCH[W] support with Zicbop
> riscv: xchg: Prefetch the destination word for sc.w
>
> Haibo Xu (1):
> perf symbols: Ignore mapping symbols on riscv
>
> Jisheng Zhang (4):
> riscv: implement user_access_begin() and families
> riscv: uaccess: use input constraints for ptr of __put_user()
> riscv: uaccess: use 'asm goto' for put_user()
> riscv: uaccess: use 'asm_goto_output' for get_user()
>
> Miquel Sabaté Solà (1):
> riscv: Improve Kconfig help for RISCV_ISA_V_PREEMPTIVE
>
> Puranjay Mohan (1):
> riscv: Implement HAVE_DYNAMIC_FTRACE_WITH_CALL_OPS
>
> Samuel Holland (1):
> riscv: module: Optimize PLT/GOT entry counting
>
> Song Shuai (2):
> riscv: kexec_file: Split the loading of kernel and others
> riscv: kexec_file: Support loading Image binary file
>
> Tiezhu Yang (1):
> riscv: Make regs_irqs_disabled() more clear
>
> Yao Zi (1):
> riscv/kexec_file: Fix comment in purgatory relocator
>
> 谢致邦 (XIE Zhibang) (1):
> RISC-V: Kconfig: Fix help text of CMDLINE_EXTEND
>
> .mailmap | 3 +-
> Documentation/arch/riscv/cmodx.rst | 46 +++-
> Documentation/arch/riscv/hwprobe.rst | 4 +
> MAINTAINERS | 4 +-
> arch/riscv/Kconfig | 36 ++-
> arch/riscv/Makefile | 4 +-
> arch/riscv/include/asm/barrier.h | 5 -
> arch/riscv/include/asm/cacheflush.h | 1 +
> arch/riscv/include/asm/cmpxchg.h | 4 +-
> arch/riscv/include/asm/ftrace.h | 62 ++---
> arch/riscv/include/asm/hwcap.h | 1 +
> arch/riscv/include/asm/image.h | 2 +
> arch/riscv/include/asm/insn-def.h | 66 ++++++
> arch/riscv/include/asm/kexec.h | 6 +
> arch/riscv/include/asm/pgtable-64.h | 5 +-
> arch/riscv/include/asm/pgtable.h | 97 ++++++++
> arch/riscv/include/asm/processor.h | 31 ++-
> arch/riscv/include/asm/ptrace.h | 2 +-
> arch/riscv/include/asm/tlbflush.h | 2 +
> arch/riscv/include/asm/uaccess.h | 218 ++++++++++++-----
> arch/riscv/include/asm/vector.h | 22 +-
> arch/riscv/include/uapi/asm/hwprobe.h | 1 +
> arch/riscv/kernel/Makefile | 2 +-
> arch/riscv/kernel/asm-offsets.c | 18 ++
> arch/riscv/kernel/cpufeature.c | 21 ++
> arch/riscv/kernel/elf_kexec.c | 485
> --------------------------------------
> arch/riscv/kernel/entry.S | 8 +
> arch/riscv/kernel/ftrace.c | 242 ++++++++++---------
> arch/riscv/kernel/kexec_elf.c | 144 +++++++++++
> arch/riscv/kernel/kexec_image.c | 96 ++++++++
> arch/riscv/kernel/machine_kexec_file.c | 361
> ++++++++++++++++++++++++++++
> arch/riscv/kernel/mcount-dyn.S | 117 +++++----
> arch/riscv/kernel/module-sections.c | 81 +++++--
> arch/riscv/kernel/sys_hwprobe.c | 1 +
> arch/riscv/mm/cacheflush.c | 29 ++-
> arch/riscv/mm/pgtable.c | 10 +
> arch/riscv/mm/tlbflush.c | 7 +
> include/linux/ftrace.h | 2 +
> kernel/trace/ftrace.c | 2 +-
> tools/perf/util/symbol-elf.c | 6 +
> 40 files changed, 1470 insertions(+), 784 deletions(-)
> delete mode 100644 arch/riscv/kernel/elf_kexec.c
> create mode 100644 arch/riscv/kernel/kexec_elf.c
> create mode 100644 arch/riscv/kernel/kexec_image.c
>
>
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kernel test robot reported warnings
(https://lore.kernel.org/oe-kbuild-all/202505122357.aPWWHCbX-lkp@intel.com/)
that the following diff fixes, can you squash that into commit ("riscv:
uaccess: use 'asm_goto_output' for get_user()")?
diff --git a/arch/riscv/include/asm/uaccess.h
b/arch/riscv/include/asm/uaccess.h
index 87d01168f80af..76c278dd2439f 100644
--- a/arch/riscv/include/asm/uaccess.h
+++ b/arch/riscv/include/asm/uaccess.h
@@ -127,6 +127,7 @@ do { \
#ifdef CONFIG_CC_HAS_ASM_GOTO_OUTPUT
#define __get_user_8(x, ptr, label) \
+do { \
u32 __user *__ptr = (u32 __user *)(ptr); \
u32 __lo, __hi; \
asm_goto_output( \
@@ -141,7 +142,7 @@ do { \
: : label); \
(x) = (__typeof__(x))((__typeof__((x) - (x)))( \
(((u64)__hi << 32) | __lo))); \
-
+} while (0)
#else /* !CONFIG_CC_HAS_ASM_GOTO_OUTPUT */
#define __get_user_8(x, ptr, label) \
do { \
Thanks,
Alex
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