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lib: sbi: Add SiFive proprietary xsfcease

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Using ISA string "xsfcease" to detect the support of the custom
instruction "CEASE".

Reviewed-by: Cyan Yang <cyan.yang@sifive.com>
Reviewed-by: Anup Patel <anup@brainfault.org>
Signed-off-by: Nick Hu <nick.hu@sifive.com>
Link: https://lore.kernel.org/r/20251020-cache-upstream-v7-6-69a132447d8a@sifive.com
Signed-off-by: Anup Patel <anup@brainfault.org>
This commit is contained in:
Nick Hu 2025-10-20 14:34:08 +08:00 committed by Anup Patel
parent 8752c809b3
commit 64904e5d5c
2 changed files with 3 additions and 0 deletions
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2
include/sbi/sbi_hart.h
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@ -83,6 +83,8 @@ enum sbi_hart_extensions {
SBI_HART_EXT_SSSTATEEN, SBI_HART_EXT_SSSTATEEN,
/** Hart has Xsfcflushdlone extension */ /** Hart has Xsfcflushdlone extension */
SBI_HART_EXT_XSIFIVE_CFLUSH_D_L1, SBI_HART_EXT_XSIFIVE_CFLUSH_D_L1,
/** Hart has Xsfcease extension */
SBI_HART_EXT_XSIFIVE_CEASE,
/** Maximum index of Hart extension */ /** Maximum index of Hart extension */
SBI_HART_EXT_MAX, SBI_HART_EXT_MAX,

1
lib/sbi/sbi_hart.c
View File

@ -716,6 +716,7 @@ const struct sbi_hart_ext_data sbi_hart_ext[] = {
__SBI_HART_EXT_DATA(ssctr, SBI_HART_EXT_SSCTR), __SBI_HART_EXT_DATA(ssctr, SBI_HART_EXT_SSCTR),
__SBI_HART_EXT_DATA(ssstateen, SBI_HART_EXT_SSSTATEEN), __SBI_HART_EXT_DATA(ssstateen, SBI_HART_EXT_SSSTATEEN),
__SBI_HART_EXT_DATA(xsfcflushdlone, SBI_HART_EXT_XSIFIVE_CFLUSH_D_L1), __SBI_HART_EXT_DATA(xsfcflushdlone, SBI_HART_EXT_XSIFIVE_CFLUSH_D_L1),
__SBI_HART_EXT_DATA(xsfcease, SBI_HART_EXT_XSIFIVE_CEASE),
}; };
_Static_assert(SBI_HART_EXT_MAX == array_size(sbi_hart_ext), _Static_assert(SBI_HART_EXT_MAX == array_size(sbi_hart_ext),