From afb8e1f06730a35d436c58367f2b15c7dbf90cf1 Mon Sep 17 00:00:00 2001
From: Heinrich Schuchardt <heinrich.schuchardt@canonical.com>
Date: Mon, 25 Oct 2021 15:09:34 +0200
Subject: [PATCH] riscv: function to retrieve SBI implementation version
Provide function sbi_get_impl_version() to retrieve the SBI implementation
version.
Signed-off-by: Heinrich Schuchardt <heinrich.schuchardt@canonical.com>
Reviewed-by: Leo Yu-Chi Liang <ycliang@andestech.com>
Reviewed-by: Rick Chen <rick@andestech.com>
---
arch/riscv/include/asm/sbi.h | 1 +
arch/riscv/lib/sbi.c | 19 +++++++++++++++++++
2 files changed, 20 insertions(+)
diff --git a/arch/riscv/include/asm/sbi.h b/arch/riscv/include/asm/sbi.h
index 5030892b47..bfcd204953 100644
--- a/arch/riscv/include/asm/sbi.h
+++ b/arch/riscv/include/asm/sbi.h
@@ -152,6 +152,7 @@ void sbi_remote_sfence_vma_asid(const unsigned long *hart_mask,
void sbi_set_timer(uint64_t stime_value);
long sbi_get_spec_version(void);
int sbi_get_impl_id(void);
+int sbi_get_impl_version(long *version);
int sbi_probe_extension(int ext);
void sbi_srst_reset(unsigned long type, unsigned long reason);
diff --git a/arch/riscv/lib/sbi.c b/arch/riscv/lib/sbi.c
index 2b53896b8a..d427d1b29e 100644
--- a/arch/riscv/lib/sbi.c
+++ b/arch/riscv/lib/sbi.c
@@ -89,6 +89,25 @@ int sbi_get_impl_id(void)
return -ENOTSUPP;
}
+/**
+ * sbi_get_impl_version() - get SBI implementation version
+ *
+ * @version: pointer to receive version
+ * Return: 0 on success, -ENOTSUPP otherwise
+ */
+int sbi_get_impl_version(long *version)
+{
+ struct sbiret ret;
+
+ ret = sbi_ecall(SBI_EXT_BASE, SBI_EXT_BASE_GET_IMP_VERSION,
+ 0, 0, 0, 0, 0, 0);
+ if (ret.error)
+ return -ENOTSUPP;
+ if (version)
+ *version = ret.value;
+ return 0;
+}
+
/**
* sbi_probe_extension() - Check if an SBI extension ID is supported or not.
* @extid: The extension ID to be probed.
--
2.39.5