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Message-ID: <6b437742-e1c2-f6dd-61c8-fb3de45d3351@kernel.org>
Date: Thu, 4 Dec 2025 12:19:20 -0700 (MST)
From: Paul Walmsley <pjw@...nel.org>
To: torvalds@...ux-foundation.org
cc: linux-riscv@...ts.infradead.org, linux-kernel@...r.kernel.org
Subject: [GIT PULL] RISC-V updates for the v6.19 merge window (part one)
Linus,
Please pull this first set of RISC-V updates for the v6.19 merge window.
The patches here should be uncontroversial. They primarily involve
probing support for recently-ratified RISC-V ISA extensions, kselftest
additions, and cleanups.
- Paul
The following changes since commit 4427259cc7f7571a157fbc9b5011e1ef6fe0a4a8:
Merge tag 'riscv-for-linus-6.18-rc6' of git://git.kernel.org/pub/scm/linux/kernel/git/riscv/linux (2025-11-10 15:35:45 -0800)
are available in the Git repository at:
git://git.kernel.org/pub/scm/linux/kernel/git/riscv/linux tags/riscv-for-linus-6.19-mw1
for you to fetch changes up to a131fd60796dbfaa6297c0c8ca8e2a7610a64281:
selftests/riscv: Add Zicbop prefetch test (2025-11-19 09:19:29 -0700)
----------------------------------------------------------------
First set of RISC-V updates for v6.19-rc1
- Enable parallel hotplug for RISC-V
- Optimize vector regset allocation for ptrace()
- Add a kernel selftest for the vector ptrace interface
- Enable the userspace RAID6 test to build and run using RISC-V
vectors
- Add initial support for the Zalasr RISC-V ratified ISA extension
- For the Zicbop RISC-V ratified ISA extension to userspace, expose
hardware and kernel support to userspace and add a kselftest for
Zicbop
- Convert open-coded instances of 'asm goto's that are controlled by
runtime ALTERNATIVEs to use riscv_has_extension_{un,}likely(),
following arm64's alternative_has_cap_{un,}likely()
- Remove an unnecessary mask in the GFP flags used in some calls to
pagetable_alloc()
----------------------------------------------------------------
Anup Patel (1):
RISC-V: Enable HOTPLUG_PARALLEL for secondary CPUs
Chunyan Zhang (3):
raid6: riscv: Prevent compiler from breaking inline vector assembly code
raid6: riscv: Allow code to be compiled in userspace
raid6: test: Add support for RISC-V
Vishal Moola (Oracle) (1):
riscv: Remove __GFP_HIGHMEM masking
Vivian Wang (5):
riscv: pgtable: Use riscv_has_extension_unlikely
riscv: checksum: Use riscv_has_extension_likely
riscv: hweight: Use riscv_has_extension_likely
riscv: bitops: Use riscv_has_extension_likely
riscv: cmpxchg: Use riscv_has_extension_likely
Xu Lu (4):
riscv: Add ISA extension parsing for Zalasr
dt-bindings: riscv: Add Zalasr ISA extension description
riscv: hwprobe: Export Zalasr extension
riscv: Introduce Zalasr instructions
Yao Zihong (2):
riscv: hwprobe: Expose Zicbop extension and its block size
selftests/riscv: Add Zicbop prefetch test
Yong-Xuan Wang (2):
riscv: ptrace: Optimize the allocation of vector regset
selftests: riscv: Add test for the Vector ptrace interface
Documentation/arch/riscv/hwprobe.rst | 11 +-
.../devicetree/bindings/riscv/extensions.yaml | 5 +
arch/riscv/Kconfig | 2 +-
arch/riscv/include/asm/arch_hweight.h | 24 +-
arch/riscv/include/asm/bitops.h | 32 +--
arch/riscv/include/asm/checksum.h | 13 +-
arch/riscv/include/asm/cmpxchg.h | 12 +-
arch/riscv/include/asm/hwcap.h | 1 +
arch/riscv/include/asm/hwprobe.h | 2 +-
arch/riscv/include/asm/insn-def.h | 79 ++++++
arch/riscv/include/asm/pgtable.h | 15 +-
arch/riscv/include/asm/vector.h | 1 +
arch/riscv/include/uapi/asm/hwprobe.h | 3 +
arch/riscv/kernel/cpufeature.c | 1 +
arch/riscv/kernel/ptrace.c | 24 +-
arch/riscv/kernel/smpboot.c | 15 ++
arch/riscv/kernel/sys_hwprobe.c | 7 +
arch/riscv/kernel/vector.c | 2 +
arch/riscv/lib/csum.c | 53 +---
arch/riscv/mm/init.c | 4 +-
arch/riscv/mm/pgtable.c | 22 +-
lib/raid6/recov_rvv.c | 7 +-
lib/raid6/rvv.c | 299 +++++++++++----------
lib/raid6/rvv.h | 17 ++
lib/raid6/test/Makefile | 8 +
tools/testing/selftests/riscv/hwprobe/cbo.c | 165 ++++++++++--
tools/testing/selftests/riscv/vector/Makefile | 5 +-
.../testing/selftests/riscv/vector/vstate_ptrace.c | 134 +++++++++
28 files changed, 657 insertions(+), 306 deletions(-)
create mode 100644 tools/testing/selftests/riscv/vector/vstate_ptrace.c
vmlinux size differences in bytes (from 4427259cc7f7):
text data bss dec hex filename
+772 +472 . +1244 +4dc vmlinux.defconfig.gcc-15
-28 +64 . +36 +24 vmlinux.nosmp_defconfig.gcc-15
+904 +256 . +1160 +488 vmlinux.rv32_defconfig.gcc-15
+60 +32 . +92 +5c vmlinux.rv32_nosmp_defconfig.gcc-15
+1047 -4008 . -2961 -b91 vmlinux.nommu_virt_defconfig.gcc-15
+636 +504 . +1140 +474 vmlinux.defconfig.clang-20
+244 +64 . +308 +134 vmlinux.nosmp_defconfig.clang-20
+204 +384 . +588 +24c vmlinux.rv32_defconfig.clang-20
-192 +96 . -96 -60 vmlinux.rv32_nosmp_defconfig.clang-20
+931 +120 . +1051 +41b vmlinux.nommu_virt_defconfig.clang-20
+600 -1128 . -528 -210 vmlinux.defconfig.gcc-14
+200 +64 . +264 +108 vmlinux.nosmp_defconfig.gcc-14
+892 +224 . +1116 +45c vmlinux.rv32_defconfig.gcc-14
+248 +96 . +344 +158 vmlinux.rv32_nosmp_defconfig.gcc-14
+1043 +88 . +1131 +46b vmlinux.nommu_virt_defconfig.gcc-14
+384 +472 . +856 +358 vmlinux.defconfig.clang-19
+92 +64 . +156 +9c vmlinux.nosmp_defconfig.clang-19
+96 +368 . +464 +1d0 vmlinux.rv32_defconfig.clang-19
-456 +112 . -344 -158 vmlinux.rv32_nosmp_defconfig.clang-19
+875 +120 . +995 +3e3 vmlinux.nommu_virt_defconfig.clang-19
+584 +216 . +800 +320 vmlinux.defconfig.gcc-13
+200 +32 . +232 +e8 vmlinux.nosmp_defconfig.gcc-13
+928 +256 . +1184 +4a0 vmlinux.rv32_defconfig.gcc-13
+164 +96 . +260 +104 vmlinux.rv32_nosmp_defconfig.gcc-13
+1079 -4072 . -2993 -bb1 vmlinux.nommu_virt_defconfig.gcc-13
+276 +472 . +748 +2ec vmlinux.defconfig.clang-18
+12 +64 . +76 +4c vmlinux.nosmp_defconfig.clang-18
+116 +336 . +452 +1c4 vmlinux.rv32_defconfig.clang-18
-480 +144 . -336 -150 vmlinux.rv32_nosmp_defconfig.clang-18
+731 +120 . +851 +353 vmlinux.nommu_virt_defconfig.clang-18
+660 +216 . +876 +36c vmlinux.defconfig.gcc-12
+192 +32 . +224 +e0 vmlinux.nosmp_defconfig.gcc-12
+928 +224 . +1152 +480 vmlinux.rv32_defconfig.gcc-12
+188 +96 . +284 +11c vmlinux.rv32_nosmp_defconfig.gcc-12
+1063 +88 . +1151 +47f vmlinux.nommu_virt_defconfig.gcc-12
+564 +536 . +1100 +44c vmlinux.defconfig.clang-17
+180 +64 . +244 +f4 vmlinux.nosmp_defconfig.clang-17
+124 +336 . +460 +1cc vmlinux.rv32_defconfig.clang-17
-432 +80 . -352 -160 vmlinux.rv32_nosmp_defconfig.clang-17
+875 +120 . +995 +3e3 vmlinux.nommu_virt_defconfig.clang-17
+644 +216 . +860 +35c vmlinux.defconfig.gcc-11
+40 +32 . +72 +48 vmlinux.nosmp_defconfig.gcc-11
+852 +224 . +1076 +434 vmlinux.rv32_defconfig.gcc-11
+44 +96 . +140 +8c vmlinux.rv32_nosmp_defconfig.gcc-11
+1079 +24 . +1103 +44f vmlinux.nommu_virt_defconfig.gcc-11
+144 +64 . +208 +d0 vmlinux.allnoconfig.gcc-14
+3507 +780 . +4287 +10bf vmlinux.allmodconfig.gcc-14
+108 +64 . +172 +ac vmlinux.allnoconfig.clang-19
x x x x x vmlinux.allmodconfig.clang-19
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