Unverified Commit 415a8c81 authored by Alexandre Ghiti's avatar Alexandre Ghiti Committed by Palmer Dabbelt
Browse files

riscv: hwprobe: export Zabha extension 



Export Zabha through the hwprobe syscall.

Reviewed-by: default avatarClément Léger <cleger@rivosinc.com>
Link: https://lore.kernel.org/r/20250421141413.394444-1-alexghiti@rivosinc.com


Signed-off-by: default avatarAlexandre Ghiti <alexghiti@rivosinc.com>
Signed-off-by: default avatarPalmer Dabbelt <palmer@dabbelt.com>
parent d7e0cce1

Documentation/arch/riscv/hwprobe.rst

+4 −0
Original line number Diff line number Diff line
@@ -271,6 +271,10 @@ The following keys are defined: 
  * :c:macro:`RISCV_HWPROBE_EXT_ZICBOM`: The Zicbom extension is supported, as

       ratified in commit 3dd606f ("Create cmobase-v1.0.pdf") of riscv-CMOs.



  * :c:macro:`RISCV_HWPROBE_EXT_ZABHA`: The Zabha extension is supported as

       ratified in commit 49f49c842ff9 ("Update to Rafified state") of

       riscv-zabha.



* :c:macro:`RISCV_HWPROBE_KEY_CPUPERF_0`: Deprecated.  Returns similar values to

     :c:macro:`RISCV_HWPROBE_KEY_MISALIGNED_SCALAR_PERF`, but the key was

     mistakenly classified as a bitmask rather than a value.

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

+1 −0
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@@ -81,6 +81,7 @@ struct riscv_hwprobe { 
#define		RISCV_HWPROBE_EXT_ZICBOM	(1ULL << 55)

#define		RISCV_HWPROBE_EXT_ZAAMO		(1ULL << 56)

#define		RISCV_HWPROBE_EXT_ZALRSC	(1ULL << 57)

#define		RISCV_HWPROBE_EXT_ZABHA		(1ULL << 58)

#define RISCV_HWPROBE_KEY_CPUPERF_0	5

#define		RISCV_HWPROBE_MISALIGNED_UNKNOWN	(0 << 0)

#define		RISCV_HWPROBE_MISALIGNED_EMULATED	(1 << 0)

arch/riscv/kernel/sys_hwprobe.c

+1 −0
Original line number Diff line number Diff line
@@ -96,6 +96,7 @@ static void hwprobe_isa_ext0(struct riscv_hwprobe *pair, 
		 * presence in the hart_isa bitmap, are made.

		 */

		EXT_KEY(ZAAMO);

		EXT_KEY(ZABHA);

		EXT_KEY(ZACAS);

		EXT_KEY(ZALRSC);

		EXT_KEY(ZAWRS);