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lib: sbi_hart: add Ssstateen extension

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We already detect Smstateen, but Ssstateen exists as well and it doesn't
have the M-state CSRs.

Reviewed-by: Anup Patel <anup@brainfault.org>
Signed-off-by: Radim Krčmář <rkrcmar@ventanamicro.com>
Link: https://lore.kernel.org/r/20250429142549.3673976-9-rkrcmar@ventanamicro.com
Signed-off-by: Anup Patel <anup@brainfault.org>
This commit is contained in:
Radim Krčmář
2025-04-29 16:25:49 +02:00
committed by Anup Patel
parent dac15cb910
commit 937118ca65
2 changed files with 7 additions and 1 deletions
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4
include/sbi/sbi_hart.h
View File

@@ -31,7 +31,7 @@ enum sbi_hart_extensions {
SBI_HART_EXT_SMAIA = 0,
/** HART has Smepmp */
SBI_HART_EXT_SMEPMP,
/** HART has Smstateen CSR **/
/** HART has Smstateen extension **/
SBI_HART_EXT_SMSTATEEN,
/** Hart has Sscofpmt extension */
SBI_HART_EXT_SSCOFPMF,
@@ -79,6 +79,8 @@ enum sbi_hart_extensions {
SBI_HART_EXT_SMCTR,
/** HART has CTR S-mode CSRs */
SBI_HART_EXT_SSCTR,
/** HART has Ssstateen extension **/
SBI_HART_EXT_SSSTATEEN,
/** Maximum index of Hart extension */
SBI_HART_EXT_MAX,

4
lib/sbi/sbi_hart.c
View File

@@ -695,6 +695,7 @@ const struct sbi_hart_ext_data sbi_hart_ext[] = {
__SBI_HART_EXT_DATA(ssdbltrp, SBI_HART_EXT_SSDBLTRP),
__SBI_HART_EXT_DATA(smctr, SBI_HART_EXT_SMCTR),
__SBI_HART_EXT_DATA(ssctr, SBI_HART_EXT_SSCTR),
__SBI_HART_EXT_DATA(ssstateen, SBI_HART_EXT_SSSTATEEN),
};
_Static_assert(SBI_HART_EXT_MAX == array_size(sbi_hart_ext),
@@ -940,6 +941,9 @@ __pmp_skip:
/* Detect if hart supports mstateen CSRs */
__check_ext_csr(SBI_HART_PRIV_VER_1_12,
CSR_MSTATEEN0, SBI_HART_EXT_SMSTATEEN);
/* Detect if hart supports sstateen CSRs */
__check_ext_csr(SBI_HART_PRIV_VER_1_12,
CSR_SSTATEEN0, SBI_HART_EXT_SSSTATEEN);
/* Detect if hart supports smcntrpmf */
__check_ext_csr(SBI_HART_PRIV_VER_1_12,
CSR_MCYCLECFG, SBI_HART_EXT_SMCNTRPMF);