[-next,v14,19/19] riscv: Enable Vector code to be built

Message ID	20230224170118.16766-20-andy.chiu@sifive.com (mailing list archive)
State	Changes Requested
Headers	show Return-Path: <linux-riscv-bounces+linux-riscv=archiver.kernel.org@lists.infradead.org> From: Andy Chiu <andy.chiu@sifive.com> To: linux-riscv@lists.infradead.org, palmer@dabbelt.com, anup@brainfault.org, atishp@atishpatra.org, kvm-riscv@lists.infradead.org, kvm@vger.kernel.org Cc: vineetg@rivosinc.com, greentime.hu@sifive.com, guoren@linux.alibaba.com, Andy Chiu <andy.chiu@sifive.com>, Paul Walmsley <paul.walmsley@sifive.com>, Albert Ou <aou@eecs.berkeley.edu> Subject: [PATCH -next v14 19/19] riscv: Enable Vector code to be built Date: Fri, 24 Feb 2023 17:01:18 +0000 Message-Id: <20230224170118.16766-20-andy.chiu@sifive.com> In-Reply-To: <20230224170118.16766-1-andy.chiu@sifive.com> References: <20230224170118.16766-1-andy.chiu@sifive.com> Precedence: list MIME-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Sender: "linux-riscv" <linux-riscv-bounces@lists.infradead.org> Errors-To: linux-riscv-bounces+linux-riscv=archiver.kernel.org@lists.infradead.org
Series	riscv: Add vector ISA support \| expand [-next,v14,00/19] riscv: Add vector ISA support [-next,v14,01/19] riscv: Rename __switch_to_aux -> fpu [-next,v14,02/19] riscv: Extending cpufeature.c to detect V-extension [-next,v14,03/19] riscv: Add new csr defines related to vector extension [-next,v14,04/19] riscv: Clear vector regfile on bootup [-next,v14,05/19] riscv: Disable Vector Instructions for kernel itself [-next,v14,06/19] riscv: Introduce Vector enable/disable helpers [-next,v14,07/19] riscv: Introduce riscv_v_vsize to record size of Vector context [-next,v14,08/19] riscv: Introduce struct/helpers to save/restore per-task Vector state [-next,v14,09/19] riscv: Add task switch support for vector [-next,v14,10/19] riscv: Allocate user's vector context in the first-use trap [-next,v14,11/19] riscv: Add ptrace vector support [-next,v14,12/19] riscv: signal: check fp-reserved words unconditionally [-next,v14,13/19] riscv: signal: Add sigcontext save/restore for vector [-next,v14,14/19] riscv: signal: Report signal frame size to userspace via auxv [-next,v14,15/19] riscv: signal: validate altstack to reflect Vector [-next,v14,16/19] riscv: prevent stack corruption by reserving task_pt_regs(p) early [-next,v14,17/19] riscv: kvm: Add V extension to KVM ISA [-next,v14,18/19] riscv: KVM: Add vector lazy save/restore support [-next,v14,19/19] riscv: Enable Vector code to be built

Andy Chiu Feb. 24, 2023, 5:01 p.m. UTC

From: Guo Ren <guoren@linux.alibaba.com>

This patch adds a config which enables vector feature from the kernel
space.

Signed-off-by: Guo Ren <guoren@linux.alibaba.com>
Co-developed-by: Greentime Hu <greentime.hu@sifive.com>
Signed-off-by: Greentime Hu <greentime.hu@sifive.com>
Suggested-by: Vineet Gupta <vineetg@rivosinc.com>
Suggested-by: Atish Patra <atishp@atishpatra.org>
Signed-off-by: Andy Chiu <andy.chiu@sifive.com>
---
 arch/riscv/Kconfig  | 18 ++++++++++++++++++
 arch/riscv/Makefile |  3 ++-
 2 files changed, 20 insertions(+), 1 deletion(-)

kernel test robot Feb. 24, 2023, 9:35 p.m. UTC | #1

Hi Andy,

I love your patch! Yet something to improve:

[auto build test ERROR on next-20230224]

url:    https://github.com/intel-lab-lkp/linux/commits/Andy-Chiu/riscv-Rename-__switch_to_aux-fpu/20230225-011059
patch link:    https://lore.kernel.org/r/20230224170118.16766-20-andy.chiu%40sifive.com
patch subject: [PATCH -next v14 19/19] riscv: Enable Vector code to be built
config: riscv-buildonly-randconfig-r002-20230222 (https://download.01.org/0day-ci/archive/20230225/202302250511.yaHzCeR1-lkp@intel.com/config)
compiler: clang version 17.0.0 (https://github.com/llvm/llvm-project db89896bbbd2251fff457699635acbbedeead27f)
reproduce (this is a W=1 build):
        wget https://raw.githubusercontent.com/intel/lkp-tests/master/sbin/make.cross -O ~/bin/make.cross
        chmod +x ~/bin/make.cross
        # install riscv cross compiling tool for clang build
        # apt-get install binutils-riscv-linux-gnu
        # https://github.com/intel-lab-lkp/linux/commit/cd0ad21a9ef9d63f1eef80fd3b09ae6e0d884ce3
        git remote add linux-review https://github.com/intel-lab-lkp/linux
        git fetch --no-tags linux-review Andy-Chiu/riscv-Rename-__switch_to_aux-fpu/20230225-011059
        git checkout cd0ad21a9ef9d63f1eef80fd3b09ae6e0d884ce3
        # save the config file
        mkdir build_dir && cp config build_dir/.config
        COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross W=1 O=build_dir ARCH=riscv olddefconfig
        COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross W=1 O=build_dir ARCH=riscv SHELL=/bin/bash arch/riscv/kernel/

If you fix the issue, kindly add following tag where applicable
| Reported-by: kernel test robot <lkp@intel.com>
| Link: https://lore.kernel.org/oe-kbuild-all/202302250511.yaHzCeR1-lkp@intel.com/

All error/warnings (new ones prefixed by >>):

   In file included from arch/riscv/kernel/ptrace.c:10:
>> arch/riscv/include/asm/vector.h:88:3: error: instruction requires the following: 'V' (Vector Extension for Application Processors), 'Zve32x' or 'Zve64x' (Vector Extensions for Embedded Processors)
                   "vsetvli        t4, x0, e8, m8, ta, ma\n\t"
                   ^
   <inline asm>:1:2: note: instantiated into assembly here
           vsetvli t4, x0, e8, m8, ta, ma
           ^
   In file included from arch/riscv/kernel/ptrace.c:10:
   arch/riscv/include/asm/vector.h:88:36: error: instruction requires the following: 'V' (Vector Extension for Application Processors), 'Zve32x' or 'Zve64x' (Vector Extensions for Embedded Processors)
                   "vsetvli        t4, x0, e8, m8, ta, ma\n\t"
                                                           ^
   <inline asm>:2:2: note: instantiated into assembly here
           vse8.v          v0, (a1)
           ^
   In file included from arch/riscv/kernel/ptrace.c:10:
   arch/riscv/include/asm/vector.h:90:21: error: instruction requires the following: 'V' (Vector Extension for Application Processors), 'Zve32x' or 'Zve64x' (Vector Extensions for Embedded Processors)
                   "add            %0, %0, t4\n\t"
                                               ^
   <inline asm>:4:2: note: instantiated into assembly here
           vse8.v          v8, (a1)
           ^
   In file included from arch/riscv/kernel/ptrace.c:10:
   arch/riscv/include/asm/vector.h:92:21: error: instruction requires the following: 'V' (Vector Extension for Application Processors), 'Zve32x' or 'Zve64x' (Vector Extensions for Embedded Processors)
                   "add            %0, %0, t4\n\t"
                                               ^
   <inline asm>:6:2: note: instantiated into assembly here
           vse8.v          v16, (a1)
           ^
   In file included from arch/riscv/kernel/ptrace.c:10:
   arch/riscv/include/asm/vector.h:94:21: error: instruction requires the following: 'V' (Vector Extension for Application Processors), 'Zve32x' or 'Zve64x' (Vector Extensions for Embedded Processors)
                   "add            %0, %0, t4\n\t"
                                               ^
   <inline asm>:8:2: note: instantiated into assembly here
           vse8.v          v24, (a1)
           ^
   5 errors generated.
--
   In file included from arch/riscv/kernel/signal.c:20:
   In file included from arch/riscv/include/asm/switch_to.h:11:
   arch/riscv/include/asm/vector.h:105:3: error: instruction requires the following: 'V' (Vector Extension for Application Processors), 'Zve32x' or 'Zve64x' (Vector Extensions for Embedded Processors)
                   "vsetvli        t4, x0, e8, m8, ta, ma\n\t"
                   ^
   <inline asm>:1:2: note: instantiated into assembly here
           vsetvli t4, x0, e8, m8, ta, ma
           ^
   In file included from arch/riscv/kernel/signal.c:20:
   In file included from arch/riscv/include/asm/switch_to.h:11:
   arch/riscv/include/asm/vector.h:105:36: error: instruction requires the following: 'V' (Vector Extension for Application Processors), 'Zve32x' or 'Zve64x' (Vector Extensions for Embedded Processors)
                   "vsetvli        t4, x0, e8, m8, ta, ma\n\t"
                                                           ^
   <inline asm>:2:2: note: instantiated into assembly here
           vle8.v          v0, (a1)
           ^
   In file included from arch/riscv/kernel/signal.c:20:
   In file included from arch/riscv/include/asm/switch_to.h:11:
   arch/riscv/include/asm/vector.h:107:21: error: instruction requires the following: 'V' (Vector Extension for Application Processors), 'Zve32x' or 'Zve64x' (Vector Extensions for Embedded Processors)
                   "add            %0, %0, t4\n\t"
                                               ^
   <inline asm>:4:2: note: instantiated into assembly here
           vle8.v          v8, (a1)
           ^
   In file included from arch/riscv/kernel/signal.c:20:
   In file included from arch/riscv/include/asm/switch_to.h:11:
   arch/riscv/include/asm/vector.h:109:21: error: instruction requires the following: 'V' (Vector Extension for Application Processors), 'Zve32x' or 'Zve64x' (Vector Extensions for Embedded Processors)
                   "add            %0, %0, t4\n\t"
                                               ^
   <inline asm>:6:2: note: instantiated into assembly here
           vle8.v          v16, (a1)
           ^
   In file included from arch/riscv/kernel/signal.c:20:
   In file included from arch/riscv/include/asm/switch_to.h:11:
   arch/riscv/include/asm/vector.h:111:21: error: instruction requires the following: 'V' (Vector Extension for Application Processors), 'Zve32x' or 'Zve64x' (Vector Extensions for Embedded Processors)
                   "add            %0, %0, t4\n\t"
                                               ^
   <inline asm>:8:2: note: instantiated into assembly here
           vle8.v          v24, (a1)
           ^
   In file included from arch/riscv/kernel/signal.c:20:
   In file included from arch/riscv/include/asm/switch_to.h:11:
   arch/riscv/include/asm/vector.h:75:3: error: instruction requires the following: 'V' (Vector Extension for Application Processors), 'Zve32x' or 'Zve64x' (Vector Extensions for Embedded Processors)
                   "vsetvl  x0, %2, %1\n\t"
                   ^
   <inline asm>:1:2: note: instantiated into assembly here
           vsetvl   x0, a3, a2
           ^
   In file included from arch/riscv/kernel/signal.c:20:
   In file included from arch/riscv/include/asm/switch_to.h:11:
>> arch/riscv/include/asm/vector.h:88:3: error: instruction requires the following: 'V' (Vector Extension for Application Processors), 'Zve32x' or 'Zve64x' (Vector Extensions for Embedded Processors)
                   "vsetvli        t4, x0, e8, m8, ta, ma\n\t"
                   ^
   <inline asm>:1:2: note: instantiated into assembly here
           vsetvli t4, x0, e8, m8, ta, ma
           ^
   In file included from arch/riscv/kernel/signal.c:20:
   In file included from arch/riscv/include/asm/switch_to.h:11:
   arch/riscv/include/asm/vector.h:88:36: error: instruction requires the following: 'V' (Vector Extension for Application Processors), 'Zve32x' or 'Zve64x' (Vector Extensions for Embedded Processors)
                   "vsetvli        t4, x0, e8, m8, ta, ma\n\t"
                                                           ^
   <inline asm>:2:2: note: instantiated into assembly here
           vse8.v          v0, (a1)
           ^
   In file included from arch/riscv/kernel/signal.c:20:
   In file included from arch/riscv/include/asm/switch_to.h:11:
   arch/riscv/include/asm/vector.h:90:21: error: instruction requires the following: 'V' (Vector Extension for Application Processors), 'Zve32x' or 'Zve64x' (Vector Extensions for Embedded Processors)
                   "add            %0, %0, t4\n\t"
                                               ^
   <inline asm>:4:2: note: instantiated into assembly here
           vse8.v          v8, (a1)
           ^
   In file included from arch/riscv/kernel/signal.c:20:
   In file included from arch/riscv/include/asm/switch_to.h:11:
   arch/riscv/include/asm/vector.h:92:21: error: instruction requires the following: 'V' (Vector Extension for Application Processors), 'Zve32x' or 'Zve64x' (Vector Extensions for Embedded Processors)
                   "add            %0, %0, t4\n\t"
                                               ^
   <inline asm>:6:2: note: instantiated into assembly here
           vse8.v          v16, (a1)
           ^
   In file included from arch/riscv/kernel/signal.c:20:
   In file included from arch/riscv/include/asm/switch_to.h:11:
   arch/riscv/include/asm/vector.h:94:21: error: instruction requires the following: 'V' (Vector Extension for Application Processors), 'Zve32x' or 'Zve64x' (Vector Extensions for Embedded Processors)
                   "add            %0, %0, t4\n\t"
                                               ^
   <inline asm>:8:2: note: instantiated into assembly here
           vse8.v          v24, (a1)
           ^
   11 errors generated.
--
>> arch/riscv/kernel/vector.c:50:3: error: expected expression
                   u32 width = RVV_EXRACT_VL_VS_WIDTH(insn_buf);
                   ^
>> arch/riscv/kernel/vector.c:52:7: error: use of undeclared identifier 'width'
                   if (width == RVV_VL_VS_WIDTH_8 || width == RVV_VL_VS_WIDTH_16 ||
                       ^
   arch/riscv/kernel/vector.c:52:37: error: use of undeclared identifier 'width'
                   if (width == RVV_VL_VS_WIDTH_8 || width == RVV_VL_VS_WIDTH_16 ||
                                                     ^
   arch/riscv/kernel/vector.c:53:7: error: use of undeclared identifier 'width'
                       width == RVV_VL_VS_WIDTH_32 || width == RVV_VL_VS_WIDTH_64)
                       ^
   arch/riscv/kernel/vector.c:53:38: error: use of undeclared identifier 'width'
                       width == RVV_VL_VS_WIDTH_32 || width == RVV_VL_VS_WIDTH_64)
                                                      ^
   arch/riscv/kernel/vector.c:57:3: error: expected expression
                   u32 csr = RVG_EXTRACT_SYSTEM_CSR(insn_buf);
                   ^
>> arch/riscv/kernel/vector.c:59:8: error: use of undeclared identifier 'csr'
                   if ((csr >= CSR_VSTART && csr <= CSR_VCSR) ||
                        ^
   arch/riscv/kernel/vector.c:59:29: error: use of undeclared identifier 'csr'
                   if ((csr >= CSR_VSTART && csr <= CSR_VCSR) ||
                                             ^
   arch/riscv/kernel/vector.c:60:8: error: use of undeclared identifier 'csr'
                       (csr >= CSR_VL && csr <= CSR_VLENB))
                        ^
   arch/riscv/kernel/vector.c:60:25: error: use of undeclared identifier 'csr'
                       (csr >= CSR_VL && csr <= CSR_VLENB))
                                         ^
>> arch/riscv/kernel/vector.c:67:5: warning: no previous prototype for function 'riscv_v_thread_zalloc' [-Wmissing-prototypes]
   int riscv_v_thread_zalloc(void)
       ^
   arch/riscv/kernel/vector.c:67:1: note: declare 'static' if the function is not intended to be used outside of this translation unit
   int riscv_v_thread_zalloc(void)
   ^
   static 
   1 warning and 10 errors generated.


vim +88 arch/riscv/include/asm/vector.h

27038c69020be5 Greentime Hu 2023-02-24  81  
e296a266de6c10 Greentime Hu 2023-02-24  82  static inline void __riscv_v_vstate_save(struct __riscv_v_ext_state *save_to,
e296a266de6c10 Greentime Hu 2023-02-24  83  					 void *datap)
27038c69020be5 Greentime Hu 2023-02-24  84  {
27038c69020be5 Greentime Hu 2023-02-24  85  	riscv_v_enable();
27038c69020be5 Greentime Hu 2023-02-24  86  	__vstate_csr_save(save_to);
27038c69020be5 Greentime Hu 2023-02-24  87  	asm volatile (
27038c69020be5 Greentime Hu 2023-02-24 @88  		"vsetvli	t4, x0, e8, m8, ta, ma\n\t"
27038c69020be5 Greentime Hu 2023-02-24  89  		"vse8.v		v0, (%0)\n\t"
27038c69020be5 Greentime Hu 2023-02-24  90  		"add		%0, %0, t4\n\t"
27038c69020be5 Greentime Hu 2023-02-24  91  		"vse8.v		v8, (%0)\n\t"
27038c69020be5 Greentime Hu 2023-02-24  92  		"add		%0, %0, t4\n\t"
27038c69020be5 Greentime Hu 2023-02-24  93  		"vse8.v		v16, (%0)\n\t"
27038c69020be5 Greentime Hu 2023-02-24  94  		"add		%0, %0, t4\n\t"
27038c69020be5 Greentime Hu 2023-02-24  95  		"vse8.v		v24, (%0)\n\t"
27038c69020be5 Greentime Hu 2023-02-24  96  		: : "r" (datap) : "t4", "memory");
27038c69020be5 Greentime Hu 2023-02-24  97  	riscv_v_disable();
27038c69020be5 Greentime Hu 2023-02-24  98  }
27038c69020be5 Greentime Hu 2023-02-24  99

kernel test robot Feb. 25, 2023, 1:33 a.m. UTC | #2

Hi Andy,

I love your patch! Perhaps something to improve:

[auto build test WARNING on next-20230224]

url:    https://github.com/intel-lab-lkp/linux/commits/Andy-Chiu/riscv-Rename-__switch_to_aux-fpu/20230225-011059
patch link:    https://lore.kernel.org/r/20230224170118.16766-20-andy.chiu%40sifive.com
patch subject: [PATCH -next v14 19/19] riscv: Enable Vector code to be built
config: riscv-randconfig-r014-20230222 (https://download.01.org/0day-ci/archive/20230225/202302250924.ukv4ZxOc-lkp@intel.com/config)
compiler: clang version 17.0.0 (https://github.com/llvm/llvm-project db89896bbbd2251fff457699635acbbedeead27f)
reproduce (this is a W=1 build):
        wget https://raw.githubusercontent.com/intel/lkp-tests/master/sbin/make.cross -O ~/bin/make.cross
        chmod +x ~/bin/make.cross
        # install riscv cross compiling tool for clang build
        # apt-get install binutils-riscv64-linux-gnu
        # https://github.com/intel-lab-lkp/linux/commit/cd0ad21a9ef9d63f1eef80fd3b09ae6e0d884ce3
        git remote add linux-review https://github.com/intel-lab-lkp/linux
        git fetch --no-tags linux-review Andy-Chiu/riscv-Rename-__switch_to_aux-fpu/20230225-011059
        git checkout cd0ad21a9ef9d63f1eef80fd3b09ae6e0d884ce3
        # save the config file
        mkdir build_dir && cp config build_dir/.config
        COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross W=1 O=build_dir ARCH=riscv olddefconfig
        COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross W=1 O=build_dir ARCH=riscv SHELL=/bin/bash lib/zstd/

If you fix the issue, kindly add following tag where applicable
| Reported-by: kernel test robot <lkp@intel.com>
| Link: https://lore.kernel.org/oe-kbuild-all/202302250924.ukv4ZxOc-lkp@intel.com/

All warnings (new ones prefixed by >>):

>> warning: Invalid size request on a scalable vector; Cannot implicitly convert a scalable size to a fixed-width size in `TypeSize::operator ScalarTy()`
>> warning: Invalid size request on a scalable vector; Cannot implicitly convert a scalable size to a fixed-width size in `TypeSize::operator ScalarTy()`
>> warning: Invalid size request on a scalable vector; Cannot implicitly convert a scalable size to a fixed-width size in `TypeSize::operator ScalarTy()`
>> warning: Invalid size request on a scalable vector; Cannot implicitly convert a scalable size to a fixed-width size in `TypeSize::operator ScalarTy()`
>> warning: Invalid size request on a scalable vector; Cannot implicitly convert a scalable size to a fixed-width size in `TypeSize::operator ScalarTy()`
>> warning: Invalid size request on a scalable vector; Cannot implicitly convert a scalable size to a fixed-width size in `TypeSize::operator ScalarTy()`
>> warning: Invalid size request on a scalable vector; Cannot implicitly convert a scalable size to a fixed-width size in `TypeSize::operator ScalarTy()`
>> warning: Invalid size request on a scalable vector; Cannot implicitly convert a scalable size to a fixed-width size in `TypeSize::operator ScalarTy()`
>> warning: Invalid size request on a scalable vector; Cannot implicitly convert a scalable size to a fixed-width size in `TypeSize::operator ScalarTy()`
>> warning: Invalid size request on a scalable vector; Cannot implicitly convert a scalable size to a fixed-width size in `TypeSize::operator ScalarTy()`
>> warning: Invalid size request on a scalable vector; Cannot implicitly convert a scalable size to a fixed-width size in `TypeSize::operator ScalarTy()`
>> warning: Invalid size request on a scalable vector; Cannot implicitly convert a scalable size to a fixed-width size in `TypeSize::operator ScalarTy()`
>> warning: Invalid size request on a scalable vector; Cannot implicitly convert a scalable size to a fixed-width size in `TypeSize::operator ScalarTy()`
>> warning: Invalid size request on a scalable vector; Cannot implicitly convert a scalable size to a fixed-width size in `TypeSize::operator ScalarTy()`
--
>> warning: Invalid size request on a scalable vector; Cannot implicitly convert a scalable size to a fixed-width size in `TypeSize::operator ScalarTy()`
>> warning: Invalid size request on a scalable vector; Cannot implicitly convert a scalable size to a fixed-width size in `TypeSize::operator ScalarTy()`
>> warning: Invalid size request on a scalable vector; Cannot implicitly convert a scalable size to a fixed-width size in `TypeSize::operator ScalarTy()`
>> warning: Invalid size request on a scalable vector; Cannot implicitly convert a scalable size to a fixed-width size in `TypeSize::operator ScalarTy()`
>> warning: Invalid size request on a scalable vector; Cannot implicitly convert a scalable size to a fixed-width size in `TypeSize::operator ScalarTy()`
>> warning: Invalid size request on a scalable vector; Cannot implicitly convert a scalable size to a fixed-width size in `TypeSize::operator ScalarTy()`
>> warning: Invalid size request on a scalable vector; Cannot implicitly convert a scalable size to a fixed-width size in `TypeSize::operator ScalarTy()`
>> warning: Invalid size request on a scalable vector; Cannot implicitly convert a scalable size to a fixed-width size in `TypeSize::operator ScalarTy()`
>> warning: Invalid size request on a scalable vector; Cannot implicitly convert a scalable size to a fixed-width size in `TypeSize::operator ScalarTy()`
>> warning: Invalid size request on a scalable vector; Cannot implicitly convert a scalable size to a fixed-width size in `TypeSize::operator ScalarTy()`
>> warning: Invalid size request on a scalable vector; Cannot implicitly convert a scalable size to a fixed-width size in `TypeSize::operator ScalarTy()`
>> warning: Invalid size request on a scalable vector; Cannot implicitly convert a scalable size to a fixed-width size in `TypeSize::operator ScalarTy()`
>> warning: Invalid size request on a scalable vector; Cannot implicitly convert a scalable size to a fixed-width size in `TypeSize::operator ScalarTy()`
>> warning: Invalid size request on a scalable vector; Cannot implicitly convert a scalable size to a fixed-width size in `TypeSize::operator ScalarTy()`
>> warning: Invalid size request on a scalable vector; Cannot implicitly convert a scalable size to a fixed-width size in `TypeSize::operator ScalarTy()`
>> warning: Invalid size request on a scalable vector; Cannot implicitly convert a scalable size to a fixed-width size in `TypeSize::operator ScalarTy()`
--
   lib/zstd/compress/huf_compress.c:471:16: warning: unused function 'HUF_isSorted' [-Wunused-function]
   MEM_STATIC int HUF_isSorted(nodeElt huffNode[], U32 const maxSymbolValue1) {
                  ^
>> warning: Invalid size request on a scalable vector; Cannot implicitly convert a scalable size to a fixed-width size in `TypeSize::operator ScalarTy()`
>> warning: Invalid size request on a scalable vector; Cannot implicitly convert a scalable size to a fixed-width size in `TypeSize::operator ScalarTy()`
>> warning: Invalid size request on a scalable vector; Cannot implicitly convert a scalable size to a fixed-width size in `TypeSize::operator ScalarTy()`
>> warning: Invalid size request on a scalable vector; Cannot implicitly convert a scalable size to a fixed-width size in `TypeSize::operator ScalarTy()`
>> warning: Invalid size request on a scalable vector; Cannot implicitly convert a scalable size to a fixed-width size in `TypeSize::operator ScalarTy()`
>> warning: Invalid size request on a scalable vector; Cannot implicitly convert a scalable size to a fixed-width size in `TypeSize::operator ScalarTy()`
>> warning: Invalid size request on a scalable vector; Cannot implicitly convert a scalable size to a fixed-width size in `TypeSize::operator ScalarTy()`
>> warning: Invalid size request on a scalable vector; Cannot implicitly convert a scalable size to a fixed-width size in `TypeSize::operator ScalarTy()`
>> warning: Invalid size request on a scalable vector; Cannot implicitly convert a scalable size to a fixed-width size in `TypeSize::operator ScalarTy()`
>> warning: Invalid size request on a scalable vector; Cannot implicitly convert a scalable size to a fixed-width size in `TypeSize::operator ScalarTy()`
>> warning: Invalid size request on a scalable vector; Cannot implicitly convert a scalable size to a fixed-width size in `TypeSize::operator ScalarTy()`
>> warning: Invalid size request on a scalable vector; Cannot implicitly convert a scalable size to a fixed-width size in `TypeSize::operator ScalarTy()`
   1 warning generated.
--
>> warning: Invalid size request on a scalable vector; Cannot implicitly convert a scalable size to a fixed-width size in `TypeSize::operator ScalarTy()`
>> warning: Invalid size request on a scalable vector; Cannot implicitly convert a scalable size to a fixed-width size in `TypeSize::operator ScalarTy()`
>> warning: Invalid size request on a scalable vector; Cannot implicitly convert a scalable size to a fixed-width size in `TypeSize::operator ScalarTy()`
>> warning: Invalid size request on a scalable vector; Cannot implicitly convert a scalable size to a fixed-width size in `TypeSize::operator ScalarTy()`
>> warning: Invalid size request on a scalable vector; Cannot implicitly convert a scalable size to a fixed-width size in `TypeSize::operator ScalarTy()`
>> warning: Invalid size request on a scalable vector; Cannot implicitly convert a scalable size to a fixed-width size in `TypeSize::operator ScalarTy()`
--
>> warning: Invalid size request on a scalable vector; Cannot implicitly convert a scalable size to a fixed-width size in `TypeSize::operator ScalarTy()`
>> warning: Invalid size request on a scalable vector; Cannot implicitly convert a scalable size to a fixed-width size in `TypeSize::operator ScalarTy()`
>> warning: Invalid size request on a scalable vector; Cannot implicitly convert a scalable size to a fixed-width size in `TypeSize::operator ScalarTy()`
--
>> warning: Invalid size request on a scalable vector; Cannot implicitly convert a scalable size to a fixed-width size in `TypeSize::operator ScalarTy()`
>> warning: Invalid size request on a scalable vector; Cannot implicitly convert a scalable size to a fixed-width size in `TypeSize::operator ScalarTy()`
>> warning: Invalid size request on a scalable vector; Cannot implicitly convert a scalable size to a fixed-width size in `TypeSize::operator ScalarTy()`
>> warning: Invalid size request on a scalable vector; Cannot implicitly convert a scalable size to a fixed-width size in `TypeSize::operator ScalarTy()`
>> warning: Invalid size request on a scalable vector; Cannot implicitly convert a scalable size to a fixed-width size in `TypeSize::operator ScalarTy()`
>> warning: Invalid size request on a scalable vector; Cannot implicitly convert a scalable size to a fixed-width size in `TypeSize::operator ScalarTy()`
>> warning: Invalid size request on a scalable vector; Cannot implicitly convert a scalable size to a fixed-width size in `TypeSize::operator ScalarTy()`
>> warning: Invalid size request on a scalable vector; Cannot implicitly convert a scalable size to a fixed-width size in `TypeSize::operator ScalarTy()`
>> warning: Invalid size request on a scalable vector; Cannot implicitly convert a scalable size to a fixed-width size in `TypeSize::operator ScalarTy()`
>> warning: Invalid size request on a scalable vector; Cannot implicitly convert a scalable size to a fixed-width size in `TypeSize::operator ScalarTy()`
>> warning: Invalid size request on a scalable vector; Cannot implicitly convert a scalable size to a fixed-width size in `TypeSize::operator ScalarTy()`
>> warning: Invalid size request on a scalable vector; Cannot implicitly convert a scalable size to a fixed-width size in `TypeSize::operator ScalarTy()`
>> warning: Invalid size request on a scalable vector; Cannot implicitly convert a scalable size to a fixed-width size in `TypeSize::operator ScalarTy()`
>> warning: Invalid size request on a scalable vector; Cannot implicitly convert a scalable size to a fixed-width size in `TypeSize::operator ScalarTy()`
>> warning: Invalid size request on a scalable vector; Cannot implicitly convert a scalable size to a fixed-width size in `TypeSize::operator ScalarTy()`
>> warning: Invalid size request on a scalable vector; Cannot implicitly convert a scalable size to a fixed-width size in `TypeSize::operator ScalarTy()`
>> warning: Invalid size request on a scalable vector; Cannot implicitly convert a scalable size to a fixed-width size in `TypeSize::operator ScalarTy()`
>> warning: Invalid size request on a scalable vector; Cannot implicitly convert a scalable size to a fixed-width size in `TypeSize::operator ScalarTy()`
>> warning: Invalid size request on a scalable vector; Cannot implicitly convert a scalable size to a fixed-width size in `TypeSize::operator ScalarTy()`
>> warning: Invalid size request on a scalable vector; Cannot implicitly convert a scalable size to a fixed-width size in `TypeSize::operator ScalarTy()`
   warning: Invalid size request on a scalable vector; Cannot implicitly convert a scalable size to a fixed-width size in `TypeSize::operator ScalarTy()`
   warning: Invalid size request on a scalable vector; Cannot implicitly convert a scalable size to a fixed-width size in `TypeSize::operator ScalarTy()`
   warning: Invalid size request on a scalable vector; Cannot implicitly convert a scalable size to a fixed-width size in `TypeSize::operator ScalarTy()`
   warning: Invalid size request on a scalable vector; Cannot implicitly convert a scalable size to a fixed-width size in `TypeSize::operator ScalarTy()`
   warning: Invalid size request on a scalable vector; Cannot implicitly convert a scalable size to a fixed-width size in `TypeSize::operator ScalarTy()`
   warning: Invalid size request on a scalable vector; Cannot implicitly convert a scalable size to a fixed-width size in `TypeSize::operator ScalarTy()`
   warning: Invalid size request on a scalable vector; Cannot implicitly convert a scalable size to a fixed-width size in `TypeSize::operator ScalarTy()`
   warning: Invalid size request on a scalable vector; Cannot implicitly convert a scalable size to a fixed-width size in `TypeSize::operator ScalarTy()`
   warning: Invalid size request on a scalable vector; Cannot implicitly convert a scalable size to a fixed-width size in `TypeSize::operator ScalarTy()`
   warning: Invalid size request on a scalable vector; Cannot implicitly convert a scalable size to a fixed-width size in `TypeSize::operator ScalarTy()`
   warning: Invalid size request on a scalable vector; Cannot implicitly convert a scalable size to a fixed-width size in `TypeSize::operator ScalarTy()`
   warning: Invalid size request on a scalable vector; Cannot implicitly convert a scalable size to a fixed-width size in `TypeSize::operator ScalarTy()`
   warning: Invalid size request on a scalable vector; Cannot implicitly convert a scalable size to a fixed-width size in `TypeSize::operator ScalarTy()`
   warning: Invalid size request on a scalable vector; Cannot implicitly convert a scalable size to a fixed-width size in `TypeSize::operator ScalarTy()`
   warning: Invalid size request on a scalable vector; Cannot implicitly convert a scalable size to a fixed-width size in `TypeSize::operator ScalarTy()`
   warning: Invalid size request on a scalable vector; Cannot implicitly convert a scalable size to a fixed-width size in `TypeSize::operator ScalarTy()`
   warning: Invalid size request on a scalable vector; Cannot implicitly convert a scalable size to a fixed-width size in `TypeSize::operator ScalarTy()`
   warning: Invalid size request on a scalable vector; Cannot implicitly convert a scalable size to a fixed-width size in `TypeSize::operator ScalarTy()`
   warning: Invalid size request on a scalable vector; Cannot implicitly convert a scalable size to a fixed-width size in `TypeSize::operator ScalarTy()`
   warning: Invalid size request on a scalable vector; Cannot implicitly convert a scalable size to a fixed-width size in `TypeSize::operator ScalarTy()`
   warning: Invalid size request on a scalable vector; Cannot implicitly convert a scalable size to a fixed-width size in `TypeSize::operator ScalarTy()`
   warning: Invalid size request on a scalable vector; Cannot implicitly convert a scalable size to a fixed-width size in `TypeSize::operator ScalarTy()`
   warning: Invalid size request on a scalable vector; Cannot implicitly convert a scalable size to a fixed-width size in `TypeSize::operator ScalarTy()`
   warning: Invalid size request on a scalable vector; Cannot implicitly convert a scalable size to a fixed-width size in `TypeSize::operator ScalarTy()`
   warning: Invalid size request on a scalable vector; Cannot implicitly convert a scalable size to a fixed-width size in `TypeSize::operator ScalarTy()`
   warning: Invalid size request on a scalable vector; Cannot implicitly convert a scalable size to a fixed-width size in `TypeSize::operator ScalarTy()`
   warning: Invalid size request on a scalable vector; Cannot implicitly convert a scalable size to a fixed-width size in `TypeSize::operator ScalarTy()`
   warning: Invalid size request on a scalable vector; Cannot implicitly convert a scalable size to a fixed-width size in `TypeSize::operator ScalarTy()`
   warning: Invalid size request on a scalable vector; Cannot implicitly convert a scalable size to a fixed-width size in `TypeSize::operator ScalarTy()`
   warning: Invalid size request on a scalable vector; Cannot implicitly convert a scalable size to a fixed-width size in `TypeSize::operator ScalarTy()`
   warning: Invalid size request on a scalable vector; Cannot implicitly convert a scalable size to a fixed-width size in `TypeSize::operator ScalarTy()`
   warning: Invalid size request on a scalable vector; Cannot implicitly convert a scalable size to a fixed-width size in `TypeSize::operator ScalarTy()`
   warning: Invalid size request on a scalable vector; Cannot implicitly convert a scalable size to a fixed-width size in `TypeSize::operator ScalarTy()`
   warning: Invalid size request on a scalable vector; Cannot implicitly convert a scalable size to a fixed-width size in `TypeSize::operator ScalarTy()`
   warning: Invalid size request on a scalable vector; Cannot implicitly convert a scalable size to a fixed-width size in `TypeSize::operator ScalarTy()`
   warning: Invalid size request on a scalable vector; Cannot implicitly convert a scalable size to a fixed-width size in `TypeSize::operator ScalarTy()`
   warning: Invalid size request on a scalable vector; Cannot implicitly convert a scalable size to a fixed-width size in `TypeSize::operator ScalarTy()`
   warning: Invalid size request on a scalable vector; Cannot implicitly convert a scalable size to a fixed-width size in `TypeSize::operator ScalarTy()`
   warning: Invalid size request on a scalable vector; Cannot implicitly convert a scalable size to a fixed-width size in `TypeSize::operator ScalarTy()`
   warning: Invalid size request on a scalable vector; Cannot implicitly convert a scalable size to a fixed-width size in `TypeSize::operator ScalarTy()`
   warning: Invalid size request on a scalable vector; Cannot implicitly convert a scalable size to a fixed-width size in `TypeSize::operator ScalarTy()`
   warning: Invalid size request on a scalable vector; Cannot implicitly convert a scalable size to a fixed-width size in `TypeSize::operator ScalarTy()`
   warning: Invalid size request on a scalable vector; Cannot implicitly convert a scalable size to a fixed-width size in `TypeSize::operator ScalarTy()`
   warning: Invalid size request on a scalable vector; Cannot implicitly convert a scalable size to a fixed-width size in `TypeSize::operator ScalarTy()`
   warning: Invalid size request on a scalable vector; Cannot implicitly convert a scalable size to a fixed-width size in `TypeSize::operator ScalarTy()`
   warning: Invalid size request on a scalable vector; Cannot implicitly convert a scalable size to a fixed-width size in `TypeSize::operator ScalarTy()`
   warning: Invalid size request on a scalable vector; Cannot implicitly convert a scalable size to a fixed-width size in `TypeSize::operator ScalarTy()`
   warning: Invalid size request on a scalable vector; Cannot implicitly convert a scalable size to a fixed-width size in `TypeSize::operator ScalarTy()`
   warning: Invalid size request on a scalable vector; Cannot implicitly convert a scalable size to a fixed-width size in `TypeSize::operator ScalarTy()`
   warning: Invalid size request on a scalable vector; Cannot implicitly convert a scalable size to a fixed-width size in `TypeSize::operator ScalarTy()`
   warning: Invalid size request on a scalable vector; Cannot implicitly convert a scalable size to a fixed-width size in `TypeSize::operator ScalarTy()`
   warning: Invalid size request on a scalable vector; Cannot implicitly convert a scalable size to a fixed-width size in `TypeSize::operator ScalarTy()`
   warning: Invalid size request on a scalable vector; Cannot implicitly convert a scalable size to a fixed-width size in `TypeSize::operator ScalarTy()`
   warning: Invalid size request on a scalable vector; Cannot implicitly convert a scalable size to a fixed-width size in `TypeSize::operator ScalarTy()`
   warning: Invalid size request on a scalable vector; Cannot implicitly convert a scalable size to a fixed-width size in `TypeSize::operator ScalarTy()`
   warning: Invalid size request on a scalable vector; Cannot implicitly convert a scalable size to a fixed-width size in `TypeSize::operator ScalarTy()`
--
>> warning: Invalid size request on a scalable vector; Cannot implicitly convert a scalable size to a fixed-width size in `TypeSize::operator ScalarTy()`
>> warning: Invalid size request on a scalable vector; Cannot implicitly convert a scalable size to a fixed-width size in `TypeSize::operator ScalarTy()`
>> warning: Invalid size request on a scalable vector; Cannot implicitly convert a scalable size to a fixed-width size in `TypeSize::operator ScalarTy()`
>> warning: Invalid size request on a scalable vector; Cannot implicitly convert a scalable size to a fixed-width size in `TypeSize::operator ScalarTy()`
>> warning: Invalid size request on a scalable vector; Cannot implicitly convert a scalable size to a fixed-width size in `TypeSize::operator ScalarTy()`
>> warning: Invalid size request on a scalable vector; Cannot implicitly convert a scalable size to a fixed-width size in `TypeSize::operator ScalarTy()`
>> warning: Invalid size request on a scalable vector; Cannot implicitly convert a scalable size to a fixed-width size in `TypeSize::operator ScalarTy()`
>> warning: Invalid size request on a scalable vector; Cannot implicitly convert a scalable size to a fixed-width size in `TypeSize::operator ScalarTy()`
>> warning: Invalid size request on a scalable vector; Cannot implicitly convert a scalable size to a fixed-width size in `TypeSize::operator ScalarTy()`
>> warning: Invalid size request on a scalable vector; Cannot implicitly convert a scalable size to a fixed-width size in `TypeSize::operator ScalarTy()`
>> warning: Invalid size request on a scalable vector; Cannot implicitly convert a scalable size to a fixed-width size in `TypeSize::operator ScalarTy()`
>> warning: Invalid size request on a scalable vector; Cannot implicitly convert a scalable size to a fixed-width size in `TypeSize::operator ScalarTy()`
>> warning: Invalid size request on a scalable vector; Cannot implicitly convert a scalable size to a fixed-width size in `TypeSize::operator ScalarTy()`
>> warning: Invalid size request on a scalable vector; Cannot implicitly convert a scalable size to a fixed-width size in `TypeSize::operator ScalarTy()`
>> warning: Invalid size request on a scalable vector; Cannot implicitly convert a scalable size to a fixed-width size in `TypeSize::operator ScalarTy()`
>> warning: Invalid size request on a scalable vector; Cannot implicitly convert a scalable size to a fixed-width size in `TypeSize::operator ScalarTy()`
>> warning: Invalid size request on a scalable vector; Cannot implicitly convert a scalable size to a fixed-width size in `TypeSize::operator ScalarTy()`
>> warning: Invalid size request on a scalable vector; Cannot implicitly convert a scalable size to a fixed-width size in `TypeSize::operator ScalarTy()`
>> warning: Invalid size request on a scalable vector; Cannot implicitly convert a scalable size to a fixed-width size in `TypeSize::operator ScalarTy()`
>> warning: Invalid size request on a scalable vector; Cannot implicitly convert a scalable size to a fixed-width size in `TypeSize::operator ScalarTy()`
   warning: Invalid size request on a scalable vector; Cannot implicitly convert a scalable size to a fixed-width size in `TypeSize::operator ScalarTy()`
   warning: Invalid size request on a scalable vector; Cannot implicitly convert a scalable size to a fixed-width size in `TypeSize::operator ScalarTy()`
   warning: Invalid size request on a scalable vector; Cannot implicitly convert a scalable size to a fixed-width size in `TypeSize::operator ScalarTy()`
   warning: Invalid size request on a scalable vector; Cannot implicitly convert a scalable size to a fixed-width size in `TypeSize::operator ScalarTy()`
   warning: Invalid size request on a scalable vector; Cannot implicitly convert a scalable size to a fixed-width size in `TypeSize::operator ScalarTy()`
   warning: Invalid size request on a scalable vector; Cannot implicitly convert a scalable size to a fixed-width size in `TypeSize::operator ScalarTy()`
   warning: Invalid size request on a scalable vector; Cannot implicitly convert a scalable size to a fixed-width size in `TypeSize::operator ScalarTy()`
   warning: Invalid size request on a scalable vector; Cannot implicitly convert a scalable size to a fixed-width size in `TypeSize::operator ScalarTy()`
   warning: Invalid size request on a scalable vector; Cannot implicitly convert a scalable size to a fixed-width size in `TypeSize::operator ScalarTy()`
   warning: Invalid size request on a scalable vector; Cannot implicitly convert a scalable size to a fixed-width size in `TypeSize::operator ScalarTy()`
   warning: Invalid size request on a scalable vector; Cannot implicitly convert a scalable size to a fixed-width size in `TypeSize::operator ScalarTy()`
   warning: Invalid size request on a scalable vector; Cannot implicitly convert a scalable size to a fixed-width size in `TypeSize::operator ScalarTy()`
   warning: Invalid size request on a scalable vector; Cannot implicitly convert a scalable size to a fixed-width size in `TypeSize::operator ScalarTy()`
   warning: Invalid size request on a scalable vector; Cannot implicitly convert a scalable size to a fixed-width size in `TypeSize::operator ScalarTy()`
   warning: Invalid size request on a scalable vector; Cannot implicitly convert a scalable size to a fixed-width size in `TypeSize::operator ScalarTy()`
   warning: Invalid size request on a scalable vector; Cannot implicitly convert a scalable size to a fixed-width size in `TypeSize::operator ScalarTy()`
   warning: Invalid size request on a scalable vector; Cannot implicitly convert a scalable size to a fixed-width size in `TypeSize::operator ScalarTy()`
   warning: Invalid size request on a scalable vector; Cannot implicitly convert a scalable size to a fixed-width size in `TypeSize::operator ScalarTy()`
   warning: Invalid size request on a scalable vector; Cannot implicitly convert a scalable size to a fixed-width size in `TypeSize::operator ScalarTy()`
   warning: Invalid size request on a scalable vector; Cannot implicitly convert a scalable size to a fixed-width size in `TypeSize::operator ScalarTy()`
   warning: Invalid size request on a scalable vector; Cannot implicitly convert a scalable size to a fixed-width size in `TypeSize::operator ScalarTy()`
   warning: Invalid size request on a scalable vector; Cannot implicitly convert a scalable size to a fixed-width size in `TypeSize::operator ScalarTy()`
   warning: Invalid size request on a scalable vector; Cannot implicitly convert a scalable size to a fixed-width size in `TypeSize::operator ScalarTy()`
   warning: Invalid size request on a scalable vector; Cannot implicitly convert a scalable size to a fixed-width size in `TypeSize::operator ScalarTy()`
   warning: Invalid size request on a scalable vector; Cannot implicitly convert a scalable size to a fixed-width size in `TypeSize::operator ScalarTy()`
   warning: Invalid size request on a scalable vector; Cannot implicitly convert a scalable size to a fixed-width size in `TypeSize::operator ScalarTy()`
   warning: Invalid size request on a scalable vector; Cannot implicitly convert a scalable size to a fixed-width size in `TypeSize::operator ScalarTy()`
   warning: Invalid size request on a scalable vector; Cannot implicitly convert a scalable size to a fixed-width size in `TypeSize::operator ScalarTy()`
   warning: Invalid size request on a scalable vector; Cannot implicitly convert a scalable size to a fixed-width size in `TypeSize::operator ScalarTy()`
   warning: Invalid size request on a scalable vector; Cannot implicitly convert a scalable size to a fixed-width size in `TypeSize::operator ScalarTy()`
   warning: Invalid size request on a scalable vector; Cannot implicitly convert a scalable size to a fixed-width size in `TypeSize::operator ScalarTy()`
   warning: Invalid size request on a scalable vector; Cannot implicitly convert a scalable size to a fixed-width size in `TypeSize::operator ScalarTy()`
   warning: Invalid size request on a scalable vector; Cannot implicitly convert a scalable size to a fixed-width size in `TypeSize::operator ScalarTy()`
   warning: Invalid size request on a scalable vector; Cannot implicitly convert a scalable size to a fixed-width size in `TypeSize::operator ScalarTy()`
   warning: Invalid size request on a scalable vector; Cannot implicitly convert a scalable size to a fixed-width size in `TypeSize::operator ScalarTy()`
   warning: Invalid size request on a scalable vector; Cannot implicitly convert a scalable size to a fixed-width size in `TypeSize::operator ScalarTy()`
   warning: Invalid size request on a scalable vector; Cannot implicitly convert a scalable size to a fixed-width size in `TypeSize::operator ScalarTy()`
   warning: Invalid size request on a scalable vector; Cannot implicitly convert a scalable size to a fixed-width size in `TypeSize::operator ScalarTy()`
   warning: Invalid size request on a scalable vector; Cannot implicitly convert a scalable size to a fixed-width size in `TypeSize::operator ScalarTy()`
   warning: Invalid size request on a scalable vector; Cannot implicitly convert a scalable size to a fixed-width size in `TypeSize::operator ScalarTy()`
   warning: Invalid size request on a scalable vector; Cannot implicitly convert a scalable size to a fixed-width size in `TypeSize::operator ScalarTy()`
   warning: Invalid size request on a scalable vector; Cannot implicitly convert a scalable size to a fixed-width size in `TypeSize::operator ScalarTy()`
   warning: Invalid size request on a scalable vector; Cannot implicitly convert a scalable size to a fixed-width size in `TypeSize::operator ScalarTy()`
   warning: Invalid size request on a scalable vector; Cannot implicitly convert a scalable size to a fixed-width size in `TypeSize::operator ScalarTy()`
   warning: Invalid size request on a scalable vector; Cannot implicitly convert a scalable size to a fixed-width size in `TypeSize::operator ScalarTy()`
   warning: Invalid size request on a scalable vector; Cannot implicitly convert a scalable size to a fixed-width size in `TypeSize::operator ScalarTy()`
   warning: Invalid size request on a scalable vector; Cannot implicitly convert a scalable size to a fixed-width size in `TypeSize::operator ScalarTy()`
   warning: Invalid size request on a scalable vector; Cannot implicitly convert a scalable size to a fixed-width size in `TypeSize::operator ScalarTy()`
   warning: Invalid size request on a scalable vector; Cannot implicitly convert a scalable size to a fixed-width size in `TypeSize::operator ScalarTy()`
   warning: Invalid size request on a scalable vector; Cannot implicitly convert a scalable size to a fixed-width size in `TypeSize::operator ScalarTy()`
   warning: Invalid size request on a scalable vector; Cannot implicitly convert a scalable size to a fixed-width size in `TypeSize::operator ScalarTy()`
   warning: Invalid size request on a scalable vector; Cannot implicitly convert a scalable size to a fixed-width size in `TypeSize::operator ScalarTy()`
   warning: Invalid size request on a scalable vector; Cannot implicitly convert a scalable size to a fixed-width size in `TypeSize::operator ScalarTy()`
   warning: Invalid size request on a scalable vector; Cannot implicitly convert a scalable size to a fixed-width size in `TypeSize::operator ScalarTy()`
   warning: Invalid size request on a scalable vector; Cannot implicitly convert a scalable size to a fixed-width size in `TypeSize::operator ScalarTy()`
   warning: Invalid size request on a scalable vector; Cannot implicitly convert a scalable size to a fixed-width size in `TypeSize::operator ScalarTy()`
   warning: Invalid size request on a scalable vector; Cannot implicitly convert a scalable size to a fixed-width size in `TypeSize::operator ScalarTy()`
   warning: Invalid size request on a scalable vector; Cannot implicitly convert a scalable size to a fixed-width size in `TypeSize::operator ScalarTy()`
   warning: Invalid size request on a scalable vector; Cannot implicitly convert a scalable size to a fixed-width size in `TypeSize::operator ScalarTy()`
   warning: Invalid size request on a scalable vector; Cannot implicitly convert a scalable size to a fixed-width size in `TypeSize::operator ScalarTy()`
   warning: Invalid size request on a scalable vector; Cannot implicitly convert a scalable size to a fixed-width size in `TypeSize::operator ScalarTy()`
   warning: Invalid size request on a scalable vector; Cannot implicitly convert a scalable size to a fixed-width size in `TypeSize::operator ScalarTy()`
   warning: Invalid size request on a scalable vector; Cannot implicitly convert a scalable size to a fixed-width size in `TypeSize::operator ScalarTy()`
   warning: Invalid size request on a scalable vector; Cannot implicitly convert a scalable size to a fixed-width size in `TypeSize::operator ScalarTy()`
   warning: Invalid size request on a scalable vector; Cannot implicitly convert a scalable size to a fixed-width size in `TypeSize::operator ScalarTy()`
   warning: Invalid size request on a scalable vector; Cannot implicitly convert a scalable size to a fixed-width size in `TypeSize::operator ScalarTy()`
   warning: Invalid size request on a scalable vector; Cannot implicitly convert a scalable size to a fixed-width size in `TypeSize::operator ScalarTy()`
   warning: Invalid size request on a scalable vector; Cannot implicitly convert a scalable size to a fixed-width size in `TypeSize::operator ScalarTy()`
--
   lib/zstd/compress/zstd_lazy.c:835:16: warning: unused function 'ZSTD_isAligned' [-Wunused-function]
   MEM_STATIC int ZSTD_isAligned(void const* ptr, size_t align) {
                  ^
>> warning: Invalid size request on a scalable vector; Cannot implicitly convert a scalable size to a fixed-width size in `TypeSize::operator ScalarTy()`
>> warning: Invalid size request on a scalable vector; Cannot implicitly convert a scalable size to a fixed-width size in `TypeSize::operator ScalarTy()`
>> warning: Invalid size request on a scalable vector; Cannot implicitly convert a scalable size to a fixed-width size in `TypeSize::operator ScalarTy()`
>> warning: Invalid size request on a scalable vector; Cannot implicitly convert a scalable size to a fixed-width size in `TypeSize::operator ScalarTy()`
>> warning: Invalid size request on a scalable vector; Cannot implicitly convert a scalable size to a fixed-width size in `TypeSize::operator ScalarTy()`
>> warning: Invalid size request on a scalable vector; Cannot implicitly convert a scalable size to a fixed-width size in `TypeSize::operator ScalarTy()`
>> warning: Invalid size request on a scalable vector; Cannot implicitly convert a scalable size to a fixed-width size in `TypeSize::operator ScalarTy()`
>> warning: Invalid size request on a scalable vector; Cannot implicitly convert a scalable size to a fixed-width size in `TypeSize::operator ScalarTy()`
>> warning: Invalid size request on a scalable vector; Cannot implicitly convert a scalable size to a fixed-width size in `TypeSize::operator ScalarTy()`
>> warning: Invalid size request on a scalable vector; Cannot implicitly convert a scalable size to a fixed-width size in `TypeSize::operator ScalarTy()`
>> warning: Invalid size request on a scalable vector; Cannot implicitly convert a scalable size to a fixed-width size in `TypeSize::operator ScalarTy()`
>> warning: Invalid size request on a scalable vector; Cannot implicitly convert a scalable size to a fixed-width size in `TypeSize::operator ScalarTy()`
>> warning: Invalid size request on a scalable vector; Cannot implicitly convert a scalable size to a fixed-width size in `TypeSize::operator ScalarTy()`
>> warning: Invalid size request on a scalable vector; Cannot implicitly convert a scalable size to a fixed-width size in `TypeSize::operator ScalarTy()`
>> warning: Invalid size request on a scalable vector; Cannot implicitly convert a scalable size to a fixed-width size in `TypeSize::operator ScalarTy()`
>> warning: Invalid size request on a scalable vector; Cannot implicitly convert a scalable size to a fixed-width size in `TypeSize::operator ScalarTy()`
>> warning: Invalid size request on a scalable vector; Cannot implicitly convert a scalable size to a fixed-width size in `TypeSize::operator ScalarTy()`
>> warning: Invalid size request on a scalable vector; Cannot implicitly convert a scalable size to a fixed-width size in `TypeSize::operator ScalarTy()`
>> warning: Invalid size request on a scalable vector; Cannot implicitly convert a scalable size to a fixed-width size in `TypeSize::operator ScalarTy()`
>> warning: Invalid size request on a scalable vector; Cannot implicitly convert a scalable size to a fixed-width size in `TypeSize::operator ScalarTy()`
   warning: Invalid size request on a scalable vector; Cannot implicitly convert a scalable size to a fixed-width size in `TypeSize::operator ScalarTy()`
   warning: Invalid size request on a scalable vector; Cannot implicitly convert a scalable size to a fixed-width size in `TypeSize::operator ScalarTy()`
   warning: Invalid size request on a scalable vector; Cannot implicitly convert a scalable size to a fixed-width size in `TypeSize::operator ScalarTy()`
   warning: Invalid size request on a scalable vector; Cannot implicitly convert a scalable size to a fixed-width size in `TypeSize::operator ScalarTy()`
   warning: Invalid size request on a scalable vector; Cannot implicitly convert a scalable size to a fixed-width size in `TypeSize::operator ScalarTy()`
   warning: Invalid size request on a scalable vector; Cannot implicitly convert a scalable size to a fixed-width size in `TypeSize::operator ScalarTy()`
   warning: Invalid size request on a scalable vector; Cannot implicitly convert a scalable size to a fixed-width size in `TypeSize::operator ScalarTy()`
   warning: Invalid size request on a scalable vector; Cannot implicitly convert a scalable size to a fixed-width size in `TypeSize::operator ScalarTy()`
   warning: Invalid size request on a scalable vector; Cannot implicitly convert a scalable size to a fixed-width size in `TypeSize::operator ScalarTy()`
   warning: Invalid size request on a scalable vector; Cannot implicitly convert a scalable size to a fixed-width size in `TypeSize::operator ScalarTy()`
   warning: Invalid size request on a scalable vector; Cannot implicitly convert a scalable size to a fixed-width size in `TypeSize::operator ScalarTy()`
   warning: Invalid size request on a scalable vector; Cannot implicitly convert a scalable size to a fixed-width size in `TypeSize::operator ScalarTy()`
   warning: Invalid size request on a scalable vector; Cannot implicitly convert a scalable size to a fixed-width size in `TypeSize::operator ScalarTy()`
   warning: Invalid size request on a scalable vector; Cannot implicitly convert a scalable size to a fixed-width size in `TypeSize::operator ScalarTy()`
   warning: Invalid size request on a scalable vector; Cannot implicitly convert a scalable size to a fixed-width size in `TypeSize::operator ScalarTy()`
   warning: Invalid size request on a scalable vector; Cannot implicitly convert a scalable size to a fixed-width size in `TypeSize::operator ScalarTy()`
   warning: Invalid size request on a scalable vector; Cannot implicitly convert a scalable size to a fixed-width size in `TypeSize::operator ScalarTy()`
   warning: Invalid size request on a scalable vector; Cannot implicitly convert a scalable size to a fixed-width size in `TypeSize::operator ScalarTy()`
   warning: Invalid size request on a scalable vector; Cannot implicitly convert a scalable size to a fixed-width size in `TypeSize::operator ScalarTy()`
   warning: Invalid size request on a scalable vector; Cannot implicitly convert a scalable size to a fixed-width size in `TypeSize::operator ScalarTy()`
   warning: Invalid size request on a scalable vector; Cannot implicitly convert a scalable size to a fixed-width size in `TypeSize::operator ScalarTy()`
   warning: Invalid size request on a scalable vector; Cannot implicitly convert a scalable size to a fixed-width size in `TypeSize::operator ScalarTy()`
   warning: Invalid size request on a scalable vector; Cannot implicitly convert a scalable size to a fixed-width size in `TypeSize::operator ScalarTy()`
   warning: Invalid size request on a scalable vector; Cannot implicitly convert a scalable size to a fixed-width size in `TypeSize::operator ScalarTy()`
   warning: Invalid size request on a scalable vector; Cannot implicitly convert a scalable size to a fixed-width size in `TypeSize::operator ScalarTy()`
   warning: Invalid size request on a scalable vector; Cannot implicitly convert a scalable size to a fixed-width size in `TypeSize::operator ScalarTy()`
   warning: Invalid size request on a scalable vector; Cannot implicitly convert a scalable size to a fixed-width size in `TypeSize::operator ScalarTy()`
   warning: Invalid size request on a scalable vector; Cannot implicitly convert a scalable size to a fixed-width size in `TypeSize::operator ScalarTy()`
   warning: Invalid size request on a scalable vector; Cannot implicitly convert a scalable size to a fixed-width size in `TypeSize::operator ScalarTy()`
   warning: Invalid size request on a scalable vector; Cannot implicitly convert a scalable size to a fixed-width size in `TypeSize::operator ScalarTy()`
   warning: Invalid size request on a scalable vector; Cannot implicitly convert a scalable size to a fixed-width size in `TypeSize::operator ScalarTy()`
   warning: Invalid size request on a scalable vector; Cannot implicitly convert a scalable size to a fixed-width size in `TypeSize::operator ScalarTy()`
   warning: Invalid size request on a scalable vector; Cannot implicitly convert a scalable size to a fixed-width size in `TypeSize::operator ScalarTy()`
   warning: Invalid size request on a scalable vector; Cannot implicitly convert a scalable size to a fixed-width size in `TypeSize::operator ScalarTy()`
   warning: Invalid size request on a scalable vector; Cannot implicitly convert a scalable size to a fixed-width size in `TypeSize::operator ScalarTy()`
   warning: Invalid size request on a scalable vector; Cannot implicitly convert a scalable size to a fixed-width size in `TypeSize::operator ScalarTy()`
   warning: Invalid size request on a scalable vector; Cannot implicitly convert a scalable size to a fixed-width size in `TypeSize::operator ScalarTy()`
   warning: Invalid size request on a scalable vector; Cannot implicitly convert a scalable size to a fixed-width size in `TypeSize::operator ScalarTy()`
   warning: Invalid size request on a scalable vector; Cannot implicitly convert a scalable size to a fixed-width size in `TypeSize::operator ScalarTy()`
   warning: Invalid size request on a scalable vector; Cannot implicitly convert a scalable size to a fixed-width size in `TypeSize::operator ScalarTy()`
   warning: Invalid size request on a scalable vector; Cannot implicitly convert a scalable size to a fixed-width size in `TypeSize::operator ScalarTy()`
   warning: Invalid size request on a scalable vector; Cannot implicitly convert a scalable size to a fixed-width size in `TypeSize::operator ScalarTy()`
   warning: Invalid size request on a scalable vector; Cannot implicitly convert a scalable size to a fixed-width size in `TypeSize::operator ScalarTy()`
   warning: Invalid size request on a scalable vector; Cannot implicitly convert a scalable size to a fixed-width size in `TypeSize::operator ScalarTy()`
   warning: Invalid size request on a scalable vector; Cannot implicitly convert a scalable size to a fixed-width size in `TypeSize::operator ScalarTy()`
   warning: Invalid size request on a scalable vector; Cannot implicitly convert a scalable size to a fixed-width size in `TypeSize::operator ScalarTy()`
   warning: Invalid size request on a scalable vector; Cannot implicitly convert a scalable size to a fixed-width size in `TypeSize::operator ScalarTy()`
   warning: Invalid size request on a scalable vector; Cannot implicitly convert a scalable size to a fixed-width size in `TypeSize::operator ScalarTy()`
   warning: Invalid size request on a scalable vector; Cannot implicitly convert a scalable size to a fixed-width size in `TypeSize::operator ScalarTy()`
   warning: Invalid size request on a scalable vector; Cannot implicitly convert a scalable size to a fixed-width size in `TypeSize::operator ScalarTy()`
   warning: Invalid size request on a scalable vector; Cannot implicitly convert a scalable size to a fixed-width size in `TypeSize::operator ScalarTy()`
   warning: Invalid size request on a scalable vector; Cannot implicitly convert a scalable size to a fixed-width size in `TypeSize::operator ScalarTy()`
   warning: Invalid size request on a scalable vector; Cannot implicitly convert a scalable size to a fixed-width size in `TypeSize::operator ScalarTy()`
   warning: Invalid size request on a scalable vector; Cannot implicitly convert a scalable size to a fixed-width size in `TypeSize::operator ScalarTy()`
   warning: Invalid size request on a scalable vector; Cannot implicitly convert a scalable size to a fixed-width size in `TypeSize::operator ScalarTy()`
   warning: Invalid size request on a scalable vector; Cannot implicitly convert a scalable size to a fixed-width size in `TypeSize::operator ScalarTy()`
   warning: Invalid size request on a scalable vector; Cannot implicitly convert a scalable size to a fixed-width size in `TypeSize::operator ScalarTy()`
   warning: Invalid size request on a scalable vector; Cannot implicitly convert a scalable size to a fixed-width size in `TypeSize::operator ScalarTy()`
   warning: Invalid size request on a scalable vector; Cannot implicitly convert a scalable size to a fixed-width size in `TypeSize::operator ScalarTy()`
   warning: Invalid size request on a scalable vector; Cannot implicitly convert a scalable size to a fixed-width size in `TypeSize::operator ScalarTy()`
   warning: Invalid size request on a scalable vector; Cannot implicitly convert a scalable size to a fixed-width size in `TypeSize::operator ScalarTy()`
   warning: Invalid size request on a scalable vector; Cannot implicitly convert a scalable size to a fixed-width size in `TypeSize::operator ScalarTy()`
   warning: Invalid size request on a scalable vector; Cannot implicitly convert a scalable size to a fixed-width size in `TypeSize::operator ScalarTy()`
   warning: Invalid size request on a scalable vector; Cannot implicitly convert a scalable size to a fixed-width size in `TypeSize::operator ScalarTy()`
   warning: Invalid size request on a scalable vector; Cannot implicitly convert a scalable size to a fixed-width size in `TypeSize::operator ScalarTy()`
   warning: Invalid size request on a scalable vector; Cannot implicitly convert a scalable size to a fixed-width size in `TypeSize::operator ScalarTy()`
   warning: Invalid size request on a scalable vector; Cannot implicitly convert a scalable size to a fixed-width size in `TypeSize::operator ScalarTy()`
   warning: Invalid size request on a scalable vector; Cannot implicitly convert a scalable size to a fixed-width size in `TypeSize::operator ScalarTy()`
   warning: Invalid size request on a scalable vector; Cannot implicitly convert a scalable size to a fixed-width size in `TypeSize::operator ScalarTy()`
   warning: Invalid size request on a scalable vector; Cannot implicitly convert a scalable size to a fixed-width size in `TypeSize::operator ScalarTy()`
   warning: Invalid size request on a scalable vector; Cannot implicitly convert a scalable size to a fixed-width size in `TypeSize::operator ScalarTy()`
   warning: Invalid size request on a scalable vector; Cannot implicitly convert a scalable size to a fixed-width size in `TypeSize::operator ScalarTy()`
   warning: Invalid size request on a scalable vector; Cannot implicitly convert a scalable size to a fixed-width size in `TypeSize::operator ScalarTy()`
   warning: Invalid size request on a scalable vector; Cannot implicitly convert a scalable size to a fixed-width size in `TypeSize::operator ScalarTy()`
   warning: Invalid size request on a scalable vector; Cannot implicitly convert a scalable size to a fixed-width size in `TypeSize::operator ScalarTy()`
   warning: Invalid size request on a scalable vector; Cannot implicitly convert a scalable size to a fixed-width size in `TypeSize::operator ScalarTy()`
   warning: Invalid size request on a scalable vector; Cannot implicitly convert a scalable size to a fixed-width size in `TypeSize::operator ScalarTy()`
   warning: Invalid size request on a scalable vector; Cannot implicitly convert a scalable size to a fixed-width size in `TypeSize::operator ScalarTy()`
   warning: Invalid size request on a scalable vector; Cannot implicitly convert a scalable size to a fixed-width size in `TypeSize::operator ScalarTy()`
   warning: Invalid size request on a scalable vector; Cannot implicitly convert a scalable size to a fixed-width size in `TypeSize::operator ScalarTy()`
   warning: Invalid size request on a scalable vector; Cannot implicitly convert a scalable size to a fixed-width size in `TypeSize::operator ScalarTy()`
   warning: Invalid size request on a scalable vector; Cannot implicitly convert a scalable size to a fixed-width size in `TypeSize::operator ScalarTy()`
   warning: Invalid size request on a scalable vector; Cannot implicitly convert a scalable size to a fixed-width size in `TypeSize::operator ScalarTy()`
   warning: Invalid size request on a scalable vector; Cannot implicitly convert a scalable size to a fixed-width size in `TypeSize::operator ScalarTy()`
   warning: Invalid size request on a scalable vector; Cannot implicitly convert a scalable size to a fixed-width size in `TypeSize::operator ScalarTy()`
   warning: Invalid size request on a scalable vector; Cannot implicitly convert a scalable size to a fixed-width size in `TypeSize::operator ScalarTy()`
   warning: Invalid size request on a scalable vector; Cannot implicitly convert a scalable size to a fixed-width size in `TypeSize::operator ScalarTy()`
   warning: Invalid size request on a scalable vector; Cannot implicitly convert a scalable size to a fixed-width size in `TypeSize::operator ScalarTy()`
   1 warning generated.
..

kernel test robot Feb. 25, 2023, 8:28 a.m. UTC | #3

Hi Andy,

I love your patch! Perhaps something to improve:

[auto build test WARNING on next-20230224]

url:    https://github.com/intel-lab-lkp/linux/commits/Andy-Chiu/riscv-Rename-__switch_to_aux-fpu/20230225-011059
patch link:    https://lore.kernel.org/r/20230224170118.16766-20-andy.chiu%40sifive.com
patch subject: [PATCH -next v14 19/19] riscv: Enable Vector code to be built
config: riscv-randconfig-r042-20230223 (https://download.01.org/0day-ci/archive/20230225/202302251633.Tsr3ebfs-lkp@intel.com/config)
compiler: riscv32-linux-gcc (GCC) 12.1.0
reproduce (this is a W=1 build):
        wget https://raw.githubusercontent.com/intel/lkp-tests/master/sbin/make.cross -O ~/bin/make.cross
        chmod +x ~/bin/make.cross
        # https://github.com/intel-lab-lkp/linux/commit/cd0ad21a9ef9d63f1eef80fd3b09ae6e0d884ce3
        git remote add linux-review https://github.com/intel-lab-lkp/linux
        git fetch --no-tags linux-review Andy-Chiu/riscv-Rename-__switch_to_aux-fpu/20230225-011059
        git checkout cd0ad21a9ef9d63f1eef80fd3b09ae6e0d884ce3
        # save the config file
        mkdir build_dir && cp config build_dir/.config
        COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-12.1.0 make.cross W=1 O=build_dir ARCH=riscv olddefconfig
        COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-12.1.0 make.cross W=1 O=build_dir ARCH=riscv SHELL=/bin/bash arch/riscv/kernel/

If you fix the issue, kindly add following tag where applicable
| Reported-by: kernel test robot <lkp@intel.com>
| Link: https://lore.kernel.org/oe-kbuild-all/202302251633.Tsr3ebfs-lkp@intel.com/

All warnings (new ones prefixed by >>):

>> arch/riscv/kernel/vector.c:67:5: warning: no previous prototype for 'riscv_v_thread_zalloc' [-Wmissing-prototypes]
      67 | int riscv_v_thread_zalloc(void)
         |     ^~~~~~~~~~~~~~~~~~~~~


vim +/riscv_v_thread_zalloc +67 arch/riscv/kernel/vector.c

b57b7b7279ef75 Andy Chiu 2023-02-24  66  
b57b7b7279ef75 Andy Chiu 2023-02-24 @67  int riscv_v_thread_zalloc(void)
b57b7b7279ef75 Andy Chiu 2023-02-24  68  {
b57b7b7279ef75 Andy Chiu 2023-02-24  69  	void *datap;
b57b7b7279ef75 Andy Chiu 2023-02-24  70  
b57b7b7279ef75 Andy Chiu 2023-02-24  71  	datap = kzalloc(riscv_v_vsize, GFP_KERNEL);
b57b7b7279ef75 Andy Chiu 2023-02-24  72  	if (!datap)
b57b7b7279ef75 Andy Chiu 2023-02-24  73  		return -ENOMEM;
b57b7b7279ef75 Andy Chiu 2023-02-24  74  	current->thread.vstate.datap = datap;
b57b7b7279ef75 Andy Chiu 2023-02-24  75  	memset(&current->thread.vstate, 0, offsetof(struct __riscv_v_ext_state,
b57b7b7279ef75 Andy Chiu 2023-02-24  76  						    datap));
b57b7b7279ef75 Andy Chiu 2023-02-24  77  	return 0;
b57b7b7279ef75 Andy Chiu 2023-02-24  78  }
b57b7b7279ef75 Andy Chiu 2023-02-24  79

Conor Dooley Feb. 27, 2023, 10:18 a.m. UTC | #4

Hey Andy,

On Fri, Feb 24, 2023 at 05:01:18PM +0000, Andy Chiu wrote:
> From: Guo Ren <guoren@linux.alibaba.com>
> 
> This patch adds a config which enables vector feature from the kernel
> space.
> 
> Signed-off-by: Guo Ren <guoren@linux.alibaba.com>
> Co-developed-by: Greentime Hu <greentime.hu@sifive.com>
> Signed-off-by: Greentime Hu <greentime.hu@sifive.com>
> Suggested-by: Vineet Gupta <vineetg@rivosinc.com>
> Suggested-by: Atish Patra <atishp@atishpatra.org>
> Signed-off-by: Andy Chiu <andy.chiu@sifive.com>

At this point, you've basically re-written this patch and should be
listed as a co-author at the very least!

> ---
>  arch/riscv/Kconfig  | 18 ++++++++++++++++++
>  arch/riscv/Makefile |  3 ++-
>  2 files changed, 20 insertions(+), 1 deletion(-)
> 
> diff --git a/arch/riscv/Kconfig b/arch/riscv/Kconfig
> index 81eb031887d2..19deeb3bb36b 100644
> --- a/arch/riscv/Kconfig
> +++ b/arch/riscv/Kconfig
> @@ -418,6 +418,24 @@ config RISCV_ISA_SVPBMT
>  
>  	   If you don't know what to do here, say Y.
>  
> +config TOOLCHAIN_HAS_V
> +	bool
> +	default y
> +	depends on !64BIT || $(cc-option,-mabi=lp64 -march=rv64iv)
> +	depends on !32BIT || $(cc-option,-mabi=ilp32 -march=rv32iv)
> +	depends on LLD_VERSION >= 140000 || LD_VERSION >= 23800
> +
> +config RISCV_ISA_V
> +	bool "VECTOR extension support"
> +	depends on TOOLCHAIN_HAS_V
> +	select DYNAMIC_SIGFRAME

So, nothing here makes V depend on CONFIG_FPU...

> +	default y
> +	help
> +	  Say N here if you want to disable all vector related procedure
> +	  in the kernel.
> +
> +	  If you don't know what to do here, say Y.
> +
>  config TOOLCHAIN_HAS_ZBB
>  	bool
>  	default y
> diff --git a/arch/riscv/Makefile b/arch/riscv/Makefile
> index 76989561566b..375a048b11cb 100644
> --- a/arch/riscv/Makefile
> +++ b/arch/riscv/Makefile
> @@ -56,6 +56,7 @@ riscv-march-$(CONFIG_ARCH_RV32I)	:= rv32ima
>  riscv-march-$(CONFIG_ARCH_RV64I)	:= rv64ima
>  riscv-march-$(CONFIG_FPU)		:= $(riscv-march-y)fd

...but march only contains fd if CONFIG_FPU is enabled...

>  riscv-march-$(CONFIG_RISCV_ISA_C)	:= $(riscv-march-y)c
> +riscv-march-$(CONFIG_RISCV_ISA_V)	:= $(riscv-march-y)v
>  
>  # Newer binutils versions default to ISA spec version 20191213 which moves some
>  # instructions from the I extension to the Zicsr and Zifencei extensions.
> @@ -65,7 +66,7 @@ riscv-march-$(toolchain-need-zicsr-zifencei) := $(riscv-march-y)_zicsr_zifencei
>  # Check if the toolchain supports Zihintpause extension
>  riscv-march-$(CONFIG_TOOLCHAIN_HAS_ZIHINTPAUSE) := $(riscv-march-y)_zihintpause
>  
> -KBUILD_CFLAGS += -march=$(subst fd,,$(riscv-march-y))
> +KBUILD_CFLAGS += -march=$(subst fdv,,$(riscv-march-y))

...so I think this will not work if !CONFIG_FPU && RISCV_ISA_V.
IIRC, vector uses some floating point opcodes, but does it (or Linux's
implementation) actually depend on having floating point support in the
kernel?
If not, this cannot be done in a oneliner. Otherwise, CONFIG_RISCV_ISA_V
should explicitly depend on CONFIG_FPU.

>  KBUILD_AFLAGS += -march=$(riscv-march-y)
>  
>  KBUILD_CFLAGS += -mno-save-restore
> -- 
> 2.17.1
> 
>

Darius Rad Feb. 27, 2023, 1:40 p.m. UTC | #5

On Mon, Feb 27, 2023 at 10:18:34AM +0000, Conor Dooley wrote:
> Hey Andy,
> 
> On Fri, Feb 24, 2023 at 05:01:18PM +0000, Andy Chiu wrote:
> > From: Guo Ren <guoren@linux.alibaba.com>
> > 
> > This patch adds a config which enables vector feature from the kernel
> > space.
> > 
> > Signed-off-by: Guo Ren <guoren@linux.alibaba.com>
> > Co-developed-by: Greentime Hu <greentime.hu@sifive.com>
> > Signed-off-by: Greentime Hu <greentime.hu@sifive.com>
> > Suggested-by: Vineet Gupta <vineetg@rivosinc.com>
> > Suggested-by: Atish Patra <atishp@atishpatra.org>
> > Signed-off-by: Andy Chiu <andy.chiu@sifive.com>
> 
> At this point, you've basically re-written this patch and should be
> listed as a co-author at the very least!
> 
> > ---
> >  arch/riscv/Kconfig  | 18 ++++++++++++++++++
> >  arch/riscv/Makefile |  3 ++-
> >  2 files changed, 20 insertions(+), 1 deletion(-)
> > 
> > diff --git a/arch/riscv/Kconfig b/arch/riscv/Kconfig
> > index 81eb031887d2..19deeb3bb36b 100644
> > --- a/arch/riscv/Kconfig
> > +++ b/arch/riscv/Kconfig
> > @@ -418,6 +418,24 @@ config RISCV_ISA_SVPBMT
> >  
> >  	   If you don't know what to do here, say Y.
> >  
> > +config TOOLCHAIN_HAS_V
> > +	bool
> > +	default y
> > +	depends on !64BIT || $(cc-option,-mabi=lp64 -march=rv64iv)
> > +	depends on !32BIT || $(cc-option,-mabi=ilp32 -march=rv32iv)
> > +	depends on LLD_VERSION >= 140000 || LD_VERSION >= 23800
> > +
> > +config RISCV_ISA_V
> > +	bool "VECTOR extension support"
> > +	depends on TOOLCHAIN_HAS_V
> > +	select DYNAMIC_SIGFRAME
> 
> So, nothing here makes V depend on CONFIG_FPU...
> 
> > +	default y
> > +	help
> > +	  Say N here if you want to disable all vector related procedure
> > +	  in the kernel.
> > +
> > +	  If you don't know what to do here, say Y.
> > +
> >  config TOOLCHAIN_HAS_ZBB
> >  	bool
> >  	default y
> > diff --git a/arch/riscv/Makefile b/arch/riscv/Makefile
> > index 76989561566b..375a048b11cb 100644
> > --- a/arch/riscv/Makefile
> > +++ b/arch/riscv/Makefile
> > @@ -56,6 +56,7 @@ riscv-march-$(CONFIG_ARCH_RV32I)	:= rv32ima
> >  riscv-march-$(CONFIG_ARCH_RV64I)	:= rv64ima
> >  riscv-march-$(CONFIG_FPU)		:= $(riscv-march-y)fd
> 
> ...but march only contains fd if CONFIG_FPU is enabled...
> 
> >  riscv-march-$(CONFIG_RISCV_ISA_C)	:= $(riscv-march-y)c
> > +riscv-march-$(CONFIG_RISCV_ISA_V)	:= $(riscv-march-y)v
> >  
> >  # Newer binutils versions default to ISA spec version 20191213 which moves some
> >  # instructions from the I extension to the Zicsr and Zifencei extensions.
> > @@ -65,7 +66,7 @@ riscv-march-$(toolchain-need-zicsr-zifencei) := $(riscv-march-y)_zicsr_zifencei
> >  # Check if the toolchain supports Zihintpause extension
> >  riscv-march-$(CONFIG_TOOLCHAIN_HAS_ZIHINTPAUSE) := $(riscv-march-y)_zihintpause
> >  
> > -KBUILD_CFLAGS += -march=$(subst fd,,$(riscv-march-y))
> > +KBUILD_CFLAGS += -march=$(subst fdv,,$(riscv-march-y))
> 
> ...so I think this will not work if !CONFIG_FPU && RISCV_ISA_V.
> IIRC, vector uses some floating point opcodes, but does it (or Linux's
> implementation) actually depend on having floating point support in the
> kernel?

Yes.

"The V extension requires the scalar processor implements the F and D
extensions", RISC-V "V" Vector Extension, Section 18.3. V: Vector Extension
for Application Processors.

> If not, this cannot be done in a oneliner. Otherwise, CONFIG_RISCV_ISA_V
> should explicitly depend on CONFIG_FPU.
> 
> >  KBUILD_AFLAGS += -march=$(riscv-march-y)
> >  
> >  KBUILD_CFLAGS += -mno-save-restore
> > -- 
> > 2.17.1
> > 
> >

Conor Dooley Feb. 27, 2023, 1:58 p.m. UTC | #6

On Mon, Feb 27, 2023 at 08:40:46AM -0500, Darius Rad wrote:
> On Mon, Feb 27, 2023 at 10:18:34AM +0000, Conor Dooley wrote:
> > On Fri, Feb 24, 2023 at 05:01:18PM +0000, Andy Chiu wrote:
> > > From: Guo Ren <guoren@linux.alibaba.com>
> > > 
> > > This patch adds a config which enables vector feature from the kernel
> > > space.
> > > 
> > > Signed-off-by: Guo Ren <guoren@linux.alibaba.com>
> > > Co-developed-by: Greentime Hu <greentime.hu@sifive.com>
> > > Signed-off-by: Greentime Hu <greentime.hu@sifive.com>
> > > Suggested-by: Vineet Gupta <vineetg@rivosinc.com>
> > > Suggested-by: Atish Patra <atishp@atishpatra.org>
> > > Signed-off-by: Andy Chiu <andy.chiu@sifive.com>
> > 
> > At this point, you've basically re-written this patch and should be
> > listed as a co-author at the very least!
> > 
> > > ---
> > >  arch/riscv/Kconfig  | 18 ++++++++++++++++++
> > >  arch/riscv/Makefile |  3 ++-
> > >  2 files changed, 20 insertions(+), 1 deletion(-)
> > > 
> > > diff --git a/arch/riscv/Kconfig b/arch/riscv/Kconfig
> > > index 81eb031887d2..19deeb3bb36b 100644
> > > --- a/arch/riscv/Kconfig
> > > +++ b/arch/riscv/Kconfig
> > > @@ -418,6 +418,24 @@ config RISCV_ISA_SVPBMT
> > >  
> > >  	   If you don't know what to do here, say Y.
> > >  
> > > +config TOOLCHAIN_HAS_V
> > > +	bool
> > > +	default y
> > > +	depends on !64BIT || $(cc-option,-mabi=lp64 -march=rv64iv)
> > > +	depends on !32BIT || $(cc-option,-mabi=ilp32 -march=rv32iv)
> > > +	depends on LLD_VERSION >= 140000 || LD_VERSION >= 23800
> > > +
> > > +config RISCV_ISA_V
> > > +	bool "VECTOR extension support"
> > > +	depends on TOOLCHAIN_HAS_V
> > > +	select DYNAMIC_SIGFRAME
> > 
> > So, nothing here makes V depend on CONFIG_FPU...
> > 
> > > +	default y
> > > +	help
> > > +	  Say N here if you want to disable all vector related procedure
> > > +	  in the kernel.
> > > +
> > > +	  If you don't know what to do here, say Y.
> > > +
> > >  config TOOLCHAIN_HAS_ZBB
> > >  	bool
> > >  	default y
> > > diff --git a/arch/riscv/Makefile b/arch/riscv/Makefile
> > > index 76989561566b..375a048b11cb 100644
> > > --- a/arch/riscv/Makefile
> > > +++ b/arch/riscv/Makefile
> > > @@ -56,6 +56,7 @@ riscv-march-$(CONFIG_ARCH_RV32I)	:= rv32ima
> > >  riscv-march-$(CONFIG_ARCH_RV64I)	:= rv64ima
> > >  riscv-march-$(CONFIG_FPU)		:= $(riscv-march-y)fd
> > 
> > ...but march only contains fd if CONFIG_FPU is enabled...
> > 
> > >  riscv-march-$(CONFIG_RISCV_ISA_C)	:= $(riscv-march-y)c
> > > +riscv-march-$(CONFIG_RISCV_ISA_V)	:= $(riscv-march-y)v
> > >  
> > >  # Newer binutils versions default to ISA spec version 20191213 which moves some
> > >  # instructions from the I extension to the Zicsr and Zifencei extensions.
> > > @@ -65,7 +66,7 @@ riscv-march-$(toolchain-need-zicsr-zifencei) := $(riscv-march-y)_zicsr_zifencei
> > >  # Check if the toolchain supports Zihintpause extension
> > >  riscv-march-$(CONFIG_TOOLCHAIN_HAS_ZIHINTPAUSE) := $(riscv-march-y)_zihintpause
> > >  
> > > -KBUILD_CFLAGS += -march=$(subst fd,,$(riscv-march-y))
> > > +KBUILD_CFLAGS += -march=$(subst fdv,,$(riscv-march-y))
> > 
> > ...so I think this will not work if !CONFIG_FPU && RISCV_ISA_V.
> > IIRC, vector uses some floating point opcodes, but does it (or Linux's
> > implementation) actually depend on having floating point support in the
> > kernel?
> 
> Yes.
> 
> "The V extension requires the scalar processor implements the F and D
> extensions", RISC-V "V" Vector Extension, Section 18.3. V: Vector Extension
> for Application Processors.

Thanks, I should probably just have gone and read the spec!

> > If not, this cannot be done in a oneliner. Otherwise, CONFIG_RISCV_ISA_V
> > should explicitly depend on CONFIG_FPU.

Since it does depend on F & D, the Kconfig symbol should explicitly
depend on CONFIG_FPU.
The oneliner like that still doesn't work, as V is added to march after
C, leading (for clang-15 allmodconfig) to: -march=rv64imafdcv_zihintpause
Doing it as a oneline also breaks the case where CONFIG_FPU &&
!RISCV_ISA_VECTOR, which ends up with: -march=rv64imafdc_zihintpause.

Cheers,
Conor.

Nathan Chancellor March 1, 2023, 6 p.m. UTC | #7

Hi Andy,

On Sat, Feb 25, 2023 at 09:33:30AM +0800, kernel test robot wrote:
> Hi Andy,
> 
> I love your patch! Perhaps something to improve:
> 
> [auto build test WARNING on next-20230224]
> 
> url:    https://github.com/intel-lab-lkp/linux/commits/Andy-Chiu/riscv-Rename-__switch_to_aux-fpu/20230225-011059
> patch link:    https://lore.kernel.org/r/20230224170118.16766-20-andy.chiu%40sifive.com
> patch subject: [PATCH -next v14 19/19] riscv: Enable Vector code to be built
> config: riscv-randconfig-r014-20230222 (https://download.01.org/0day-ci/archive/20230225/202302250924.ukv4ZxOc-lkp@intel.com/config)
> compiler: clang version 17.0.0 (https://github.com/llvm/llvm-project db89896bbbd2251fff457699635acbbedeead27f)
> reproduce (this is a W=1 build):
>         wget https://raw.githubusercontent.com/intel/lkp-tests/master/sbin/make.cross -O ~/bin/make.cross
>         chmod +x ~/bin/make.cross
>         # install riscv cross compiling tool for clang build
>         # apt-get install binutils-riscv64-linux-gnu
>         # https://github.com/intel-lab-lkp/linux/commit/cd0ad21a9ef9d63f1eef80fd3b09ae6e0d884ce3
>         git remote add linux-review https://github.com/intel-lab-lkp/linux
>         git fetch --no-tags linux-review Andy-Chiu/riscv-Rename-__switch_to_aux-fpu/20230225-011059
>         git checkout cd0ad21a9ef9d63f1eef80fd3b09ae6e0d884ce3
>         # save the config file
>         mkdir build_dir && cp config build_dir/.config
>         COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross W=1 O=build_dir ARCH=riscv olddefconfig
>         COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross W=1 O=build_dir ARCH=riscv SHELL=/bin/bash lib/zstd/
> 
> If you fix the issue, kindly add following tag where applicable
> | Reported-by: kernel test robot <lkp@intel.com>
> | Link: https://lore.kernel.org/oe-kbuild-all/202302250924.ukv4ZxOc-lkp@intel.com/
> 
> All warnings (new ones prefixed by >>):
> 
> >> warning: Invalid size request on a scalable vector; Cannot implicitly convert a scalable size to a fixed-width size in `TypeSize::operator ScalarTy()`

Please consider adding the following diff to patch 19 to avoid this
issue (see the upstream bug report for more details):

diff --git a/arch/riscv/Kconfig b/arch/riscv/Kconfig
index eb691dd8ee4f..187cd6c1d8c9 100644
--- a/arch/riscv/Kconfig
+++ b/arch/riscv/Kconfig
@@ -423,6 +423,8 @@ config TOOLCHAIN_HAS_V
 	depends on !64BIT || $(cc-option,-mabi=lp64 -march=rv64iv)
 	depends on !32BIT || $(cc-option,-mabi=ilp32 -march=rv32iv)
 	depends on LLD_VERSION >= 140000 || LD_VERSION >= 23800
+	# https://github.com/llvm/llvm-project/issues/61096
+	depends on !(CC_IS_CLANG && CLANG_VERSION >= 160000 && KASAN)
 
 config RISCV_ISA_V
 	bool "VECTOR extension support"
---

Additionally, with older versions of clang 15.x and older, I see:

  arch/riscv/kernel/vector.c:50:3: error: expected expression
                  u32 width = RVV_EXRACT_VL_VS_WIDTH(insn_buf);
                  ^
  arch/riscv/kernel/vector.c:52:7: error: use of undeclared identifier 'width'
                  if (width == RVV_VL_VS_WIDTH_8 || width == RVV_VL_VS_WIDTH_16 ||
                      ^
  arch/riscv/kernel/vector.c:52:37: error: use of undeclared identifier 'width'
                  if (width == RVV_VL_VS_WIDTH_8 || width == RVV_VL_VS_WIDTH_16 ||
                                                    ^
  arch/riscv/kernel/vector.c:53:7: error: use of undeclared identifier 'width'
                      width == RVV_VL_VS_WIDTH_32 || width == RVV_VL_VS_WIDTH_64)
                      ^
  arch/riscv/kernel/vector.c:53:38: error: use of undeclared identifier 'width'
                      width == RVV_VL_VS_WIDTH_32 || width == RVV_VL_VS_WIDTH_64)
                                                     ^
  arch/riscv/kernel/vector.c:57:3: error: expected expression
                  u32 csr = RVG_EXTRACT_SYSTEM_CSR(insn_buf);
                  ^
  arch/riscv/kernel/vector.c:59:8: error: use of undeclared identifier 'csr'
                  if ((csr >= CSR_VSTART && csr <= CSR_VCSR) ||
                       ^
  arch/riscv/kernel/vector.c:59:29: error: use of undeclared identifier 'csr'
                  if ((csr >= CSR_VSTART && csr <= CSR_VCSR) ||
                                            ^
  arch/riscv/kernel/vector.c:60:8: error: use of undeclared identifier 'csr'
                      (csr >= CSR_VL && csr <= CSR_VLENB))
                       ^
  arch/riscv/kernel/vector.c:60:25: error: use of undeclared identifier 'csr'
                      (csr >= CSR_VL && csr <= CSR_VLENB))
                                        ^
  10 errors generated.

which is fixed by:

diff --git a/arch/riscv/kernel/vector.c b/arch/riscv/kernel/vector.c
index 585e2c51b28e..8c98db9c0ae1 100644
--- a/arch/riscv/kernel/vector.c
+++ b/arch/riscv/kernel/vector.c
@@ -46,14 +46,15 @@ static bool insn_is_vector(u32 insn_buf)
 		is_vector = true;
 		break;
 	case RVV_OPCODE_VL:
-	case RVV_OPCODE_VS:
+	case RVV_OPCODE_VS: {
 		u32 width = RVV_EXRACT_VL_VS_WIDTH(insn_buf);
 
 		if (width == RVV_VL_VS_WIDTH_8 || width == RVV_VL_VS_WIDTH_16 ||
 		    width == RVV_VL_VS_WIDTH_32 || width == RVV_VL_VS_WIDTH_64)
 			is_vector = true;
 		break;
-	case RVG_OPCODE_SYSTEM:
+	}
+	case RVG_OPCODE_SYSTEM: {
 		u32 csr = RVG_EXTRACT_SYSTEM_CSR(insn_buf);
 
 		if ((csr >= CSR_VSTART && csr <= CSR_VCSR) ||
@@ -61,6 +62,7 @@ static bool insn_is_vector(u32 insn_buf)
 			is_vector = true;
 		break;
 	}
+	}
 	return is_vector;
 }
 
---

Cheers,
Nathan

Conor Dooley March 1, 2023, 6:44 p.m. UTC | #8

On Wed, Mar 01, 2023 at 11:00:00AM -0700, Nathan Chancellor wrote:
> Hi Andy,
> 
> On Sat, Feb 25, 2023 at 09:33:30AM +0800, kernel test robot wrote:
> > Hi Andy,
> > 
> > I love your patch! Perhaps something to improve:
> > 
> > [auto build test WARNING on next-20230224]
> > 
> > url:    https://github.com/intel-lab-lkp/linux/commits/Andy-Chiu/riscv-Rename-__switch_to_aux-fpu/20230225-011059
> > patch link:    https://lore.kernel.org/r/20230224170118.16766-20-andy.chiu%40sifive.com
> > patch subject: [PATCH -next v14 19/19] riscv: Enable Vector code to be built
> > config: riscv-randconfig-r014-20230222 (https://download.01.org/0day-ci/archive/20230225/202302250924.ukv4ZxOc-lkp@intel.com/config)
> > compiler: clang version 17.0.0 (https://github.com/llvm/llvm-project db89896bbbd2251fff457699635acbbedeead27f)
> > reproduce (this is a W=1 build):
> >         wget https://raw.githubusercontent.com/intel/lkp-tests/master/sbin/make.cross -O ~/bin/make.cross
> >         chmod +x ~/bin/make.cross
> >         # install riscv cross compiling tool for clang build
> >         # apt-get install binutils-riscv64-linux-gnu
> >         # https://github.com/intel-lab-lkp/linux/commit/cd0ad21a9ef9d63f1eef80fd3b09ae6e0d884ce3
> >         git remote add linux-review https://github.com/intel-lab-lkp/linux
> >         git fetch --no-tags linux-review Andy-Chiu/riscv-Rename-__switch_to_aux-fpu/20230225-011059
> >         git checkout cd0ad21a9ef9d63f1eef80fd3b09ae6e0d884ce3
> >         # save the config file
> >         mkdir build_dir && cp config build_dir/.config
> >         COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross W=1 O=build_dir ARCH=riscv olddefconfig
> >         COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross W=1 O=build_dir ARCH=riscv SHELL=/bin/bash lib/zstd/
> > 
> > If you fix the issue, kindly add following tag where applicable
> > | Reported-by: kernel test robot <lkp@intel.com>
> > | Link: https://lore.kernel.org/oe-kbuild-all/202302250924.ukv4ZxOc-lkp@intel.com/
> > 
> > All warnings (new ones prefixed by >>):
> > 
> > >> warning: Invalid size request on a scalable vector; Cannot implicitly convert a scalable size to a fixed-width size in `TypeSize::operator ScalarTy()`
> 
> Please consider adding the following diff to patch 19 to avoid this
> issue (see the upstream bug report for more details):
> 
> diff --git a/arch/riscv/Kconfig b/arch/riscv/Kconfig
> index eb691dd8ee4f..187cd6c1d8c9 100644
> --- a/arch/riscv/Kconfig
> +++ b/arch/riscv/Kconfig
> @@ -423,6 +423,8 @@ config TOOLCHAIN_HAS_V
>  	depends on !64BIT || $(cc-option,-mabi=lp64 -march=rv64iv)
>  	depends on !32BIT || $(cc-option,-mabi=ilp32 -march=rv32iv)
>  	depends on LLD_VERSION >= 140000 || LD_VERSION >= 23800
> +	# https://github.com/llvm/llvm-project/issues/61096
> +	depends on !(CC_IS_CLANG && CLANG_VERSION >= 160000 && KASAN)

Please don't! As far as I can tell, this is what I was warning about in:
https://lore.kernel.org/linux-riscv/20230224170118.16766-1-andy.chiu@sifive.com/T/#m2c0e6128230d407c843e10406305da9ff5dca902

The randconfig has RISCV_ISA_C enabled, so you're getting an ISA string
containing "fdcv" and `fdv,,$(riscv-march-y)` fails to remove either fd,
or v.

The below is very much valid though, please test v15 with clang/llvm
Andy!

> Additionally, with older versions of clang 15.x and older, I see:
> 
>   arch/riscv/kernel/vector.c:50:3: error: expected expression
>                   u32 width = RVV_EXRACT_VL_VS_WIDTH(insn_buf);
>                   ^
>   arch/riscv/kernel/vector.c:52:7: error: use of undeclared identifier 'width'
>                   if (width == RVV_VL_VS_WIDTH_8 || width == RVV_VL_VS_WIDTH_16 ||
>                       ^
>   arch/riscv/kernel/vector.c:52:37: error: use of undeclared identifier 'width'
>                   if (width == RVV_VL_VS_WIDTH_8 || width == RVV_VL_VS_WIDTH_16 ||
>                                                     ^
>   arch/riscv/kernel/vector.c:53:7: error: use of undeclared identifier 'width'
>                       width == RVV_VL_VS_WIDTH_32 || width == RVV_VL_VS_WIDTH_64)
>                       ^
>   arch/riscv/kernel/vector.c:53:38: error: use of undeclared identifier 'width'
>                       width == RVV_VL_VS_WIDTH_32 || width == RVV_VL_VS_WIDTH_64)
>                                                      ^
>   arch/riscv/kernel/vector.c:57:3: error: expected expression
>                   u32 csr = RVG_EXTRACT_SYSTEM_CSR(insn_buf);
>                   ^
>   arch/riscv/kernel/vector.c:59:8: error: use of undeclared identifier 'csr'
>                   if ((csr >= CSR_VSTART && csr <= CSR_VCSR) ||
>                        ^
>   arch/riscv/kernel/vector.c:59:29: error: use of undeclared identifier 'csr'
>                   if ((csr >= CSR_VSTART && csr <= CSR_VCSR) ||
>                                             ^
>   arch/riscv/kernel/vector.c:60:8: error: use of undeclared identifier 'csr'
>                       (csr >= CSR_VL && csr <= CSR_VLENB))
>                        ^
>   arch/riscv/kernel/vector.c:60:25: error: use of undeclared identifier 'csr'
>                       (csr >= CSR_VL && csr <= CSR_VLENB))
>                                         ^
>   10 errors generated.
> 
> which is fixed by:
> 
> diff --git a/arch/riscv/kernel/vector.c b/arch/riscv/kernel/vector.c
> index 585e2c51b28e..8c98db9c0ae1 100644
> --- a/arch/riscv/kernel/vector.c
> +++ b/arch/riscv/kernel/vector.c
> @@ -46,14 +46,15 @@ static bool insn_is_vector(u32 insn_buf)
>  		is_vector = true;
>  		break;
>  	case RVV_OPCODE_VL:
> -	case RVV_OPCODE_VS:
> +	case RVV_OPCODE_VS: {
>  		u32 width = RVV_EXRACT_VL_VS_WIDTH(insn_buf);
>  
>  		if (width == RVV_VL_VS_WIDTH_8 || width == RVV_VL_VS_WIDTH_16 ||
>  		    width == RVV_VL_VS_WIDTH_32 || width == RVV_VL_VS_WIDTH_64)
>  			is_vector = true;
>  		break;
> -	case RVG_OPCODE_SYSTEM:
> +	}
> +	case RVG_OPCODE_SYSTEM: {
>  		u32 csr = RVG_EXTRACT_SYSTEM_CSR(insn_buf);
>  
>  		if ((csr >= CSR_VSTART && csr <= CSR_VCSR) ||
> @@ -61,6 +62,7 @@ static bool insn_is_vector(u32 insn_buf)
>  			is_vector = true;
>  		break;
>  	}
> +	}
>  	return is_vector;
>  }
>  
> ---
> 
> Cheers,
> Nathan

[-next,v14,19/19] riscv: Enable Vector code to be built

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