[RFC 2/3] lib: sbi: Add Zkr in hart extensions

[Heinrich Schuchardt]

- Add Zkr as extension in sbi_hart_extensions enum
- Return "zkr" string for Zkr extension from sbi_hart_extension_id2string

Signed-off-by: Heinrich Schuchardt <heinrich.schuchardt at canonical.com>
---
 include/sbi/sbi_hart.h     | 2 ++
 lib/sbi/sbi_hart.c         | 3 +++
 lib/utils/fdt/fdt_helper.c | 1 +
 3 files changed, 6 insertions(+)

diff --git a/include/sbi/sbi_hart.h b/include/sbi/sbi_hart.h
index e60f415..fe1124a 100644
--- a/include/sbi/sbi_hart.h
+++ b/include/sbi/sbi_hart.h
@@ -40,6 +40,8 @@ enum sbi_hart_extensions {
 	SBI_HART_EXT_ZICNTR,
 	/** HART has Zihpm extension */
 	SBI_HART_EXT_ZIHPM,
+	/** HART has Zkr extension */
+	SBI_HART_EXT_ZKR,
 	/** Hart has Smcntrpmf extension */
 	SBI_HART_EXT_SMCNTRPMF,
 
diff --git a/lib/sbi/sbi_hart.c b/lib/sbi/sbi_hart.c
index 29d6481..569596f 100644
--- a/lib/sbi/sbi_hart.c
+++ b/lib/sbi/sbi_hart.c
@@ -678,6 +678,9 @@ static inline char *sbi_hart_extension_id2string(int ext)
 	case SBI_HART_EXT_ZIHPM:
 		estr = "zihpm";
 		break;
+	case SBI_HART_EXT_ZKR:
+		estr = "zkr";
+		break;
 	case SBI_HART_EXT_SMEPMP:
 		estr = "smepmp";
 		break;
diff --git a/lib/utils/fdt/fdt_helper.c b/lib/utils/fdt/fdt_helper.c
index 9ae7f09..35be7ba 100644
--- a/lib/utils/fdt/fdt_helper.c
+++ b/lib/utils/fdt/fdt_helper.c
@@ -376,6 +376,7 @@ static int fdt_parse_isa_one_hart(const char *isa, unsigned long *extensions)
 			}
 
 		set_multi_letter_ext("smepmp", SBI_HART_EXT_SMEPMP);
+		set_multi_letter_ext("zkr", SBI_HART_EXT_ZKR);
 #undef set_multi_letter_ext
 	}
 
-- 
2.40.1