Unverified Commit e8fd215e authored by Cyan Yang's avatar Cyan Yang Committed by Palmer Dabbelt
Browse files

riscv: hwprobe: Document SiFive xsfvqmaccdod and xsfvqmaccqoq vendor extensions 



Document the support for sifive vendor extensions using the key
RISCV_HWPROBE_KEY_VENDOR_EXT_SIFIVE_0 and two vendor extensions for SiFive
Int8 Matrix Multiplication Instructions using
RISCV_HWPROBE_VENDOR_EXT_XSFVQMACCDOD and
RISCV_HWPROBE_VENDOR_EXT_XSFVQMACCQOQ.

Signed-off-by: default avatarCyan Yang <cyan.yang@sifive.com>
Link: https://lore.kernel.org/r/20250418053239.4351-4-cyan.yang@sifive.com


Signed-off-by: default avatarPalmer Dabbelt <palmer@rivosinc.com>
parent 2d147d77

Documentation/arch/riscv/hwprobe.rst

+14 −0
Original line number Diff line number Diff line
@@ -335,3 +335,17 @@ The following keys are defined: 


* :c:macro:`RISCV_HWPROBE_KEY_ZICBOM_BLOCK_SIZE`: An unsigned int which

  represents the size of the Zicbom block in bytes.



* :c:macro:`RISCV_HWPROBE_KEY_VENDOR_EXT_SIFIVE_0`: A bitmask containing the

  sifive vendor extensions that are compatible with the

  :c:macro:`RISCV_HWPROBE_BASE_BEHAVIOR_IMA`: base system behavior.



  * SIFIVE



    * :c:macro:`RISCV_HWPROBE_VENDOR_EXT_XSFVQMACCDOD`: The Xsfqmaccdod vendor

        extension is supported in version 1.1 of SiFive Int8 Matrix Multiplication

	Extensions Specification.



    * :c:macro:`RISCV_HWPROBE_VENDOR_EXT_XSFVQMACCQOQ`: The Xsfqmaccqoq vendor

        extension is supported in version 1.1 of SiFive Int8 Matrix Multiplication

	Instruction Extensions Specification.

arch/riscv/include/asm/hwprobe.h

+1 −1
Original line number Diff line number Diff line
@@ -8,7 +8,7 @@ 


#include <uapi/asm/hwprobe.h>



#define RISCV_HWPROBE_MAX_KEY 12

#define RISCV_HWPROBE_MAX_KEY 13



static inline bool riscv_hwprobe_key_is_valid(__s64 key)

{

arch/riscv/include/uapi/asm/hwprobe.h

+1 −0
Original line number Diff line number Diff line
@@ -104,6 +104,7 @@ struct riscv_hwprobe { 
#define		RISCV_HWPROBE_MISALIGNED_VECTOR_UNSUPPORTED	4

#define RISCV_HWPROBE_KEY_VENDOR_EXT_THEAD_0	11

#define RISCV_HWPROBE_KEY_ZICBOM_BLOCK_SIZE	12

#define RISCV_HWPROBE_KEY_VENDOR_EXT_SIFIVE_0	13

/* Increase RISCV_HWPROBE_MAX_KEY when adding items. */



/* Flags */