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riscv: add ISA extension parsing for Zilsd and Zclsd

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Add parsing for Zilsd and Zclsd ISA extensions which were ratified in
commit f88abf1 ("Integrating load/store pair for RV32 with the
main manual") of the riscv-isa-manual.

Signed-off-by: Pincheng Wang <pincheng.plct@isrc.iscas.ac.cn>
Reviewed-by: Nutty Liu <nutty.liu@hotmail.com>
Link: https://patch.msgid.link/20250826162939.1494021-3-pincheng.plct@isrc.iscas.ac.cn
[pjw@kernel.org: cleaned up checkpatch issues, whitespace; updated to apply]
Signed-off-by: Paul Walmsley <pjw@kernel.org>
This commit is contained in:
Pincheng Wang 2025-08-27 00:29:36 +08:00 committed by Paul Walmsley
parent 4115155baf
commit 3f0cbfb8a1
2 changed files with 26 additions and 0 deletions
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2
arch/riscv/include/asm/hwcap.h
View File

@ -108,6 +108,8 @@
#define RISCV_ISA_EXT_ZICBOP 99
#define RISCV_ISA_EXT_SVRSW60T59B 100
#define RISCV_ISA_EXT_ZALASR 101
#define RISCV_ISA_EXT_ZILSD 102
#define RISCV_ISA_EXT_ZCLSD 103
#define RISCV_ISA_EXT_XLINUXENVCFG 127

24
arch/riscv/kernel/cpufeature.c
View File

@ -242,6 +242,28 @@ static int riscv_ext_zcf_validate(const struct riscv_isa_ext_data *data,
return -EPROBE_DEFER;
}
static int riscv_ext_zilsd_validate(const struct riscv_isa_ext_data *data,
const unsigned long *isa_bitmap)
{
if (IS_ENABLED(CONFIG_64BIT))
return -EINVAL;
return 0;
}
static int riscv_ext_zclsd_validate(const struct riscv_isa_ext_data *data,
const unsigned long *isa_bitmap)
{
if (IS_ENABLED(CONFIG_64BIT))
return -EINVAL;
if (__riscv_isa_extension_available(isa_bitmap, RISCV_ISA_EXT_ZILSD) &&
__riscv_isa_extension_available(isa_bitmap, RISCV_ISA_EXT_ZCA))
return 0;
return -EPROBE_DEFER;
}
static int riscv_vector_f_validate(const struct riscv_isa_ext_data *data,
const unsigned long *isa_bitmap)
{
@ -484,6 +506,8 @@ const struct riscv_isa_ext_data riscv_isa_ext[] = {
__RISCV_ISA_EXT_DATA_VALIDATE(zcd, RISCV_ISA_EXT_ZCD, riscv_ext_zcd_validate),
__RISCV_ISA_EXT_DATA_VALIDATE(zcf, RISCV_ISA_EXT_ZCF, riscv_ext_zcf_validate),
__RISCV_ISA_EXT_DATA_VALIDATE(zcmop, RISCV_ISA_EXT_ZCMOP, riscv_ext_zca_depends),
__RISCV_ISA_EXT_DATA_VALIDATE(zclsd, RISCV_ISA_EXT_ZCLSD, riscv_ext_zclsd_validate),
__RISCV_ISA_EXT_DATA_VALIDATE(zilsd, RISCV_ISA_EXT_ZILSD, riscv_ext_zilsd_validate),
__RISCV_ISA_EXT_DATA(zba, RISCV_ISA_EXT_ZBA),
__RISCV_ISA_EXT_DATA(zbb, RISCV_ISA_EXT_ZBB),
__RISCV_ISA_EXT_DATA(zbc, RISCV_ISA_EXT_ZBC),