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Message-Id: <20250917085246.1430354-1-xiangwencheng@lanxincomputing.com>
Date: Wed, 17 Sep 2025 16:52:46 +0800
From: "BillXiang" <xiangwencheng@...xincomputing.com>
To: <anup@...infault.org>
Cc: <kvm-riscv@...ts.infradead.org>, <linux-kernel@...r.kernel.org>,
<paul.walmsley@...ive.com>, <palmer@...belt.com>,
<aou@...s.berkeley.edu>, <alex@...ti.fr>, <atishp@...osinc.com>,
<ajones@...tanamicro.com>,
"BillXiang" <xiangwencheng@...xincomputing.com>
Subject: [PATCH] riscv: Move user-visible sbi ext ids to uapi
Move those sbi ext ids to uapi because they will be forwarded
to user space by kvm.
Signed-off-by: BillXiang <xiangwencheng@...xincomputing.com>
---
arch/riscv/include/asm/sbi.h | 16 +-----------
arch/riscv/include/uapi/asm/sbi.h | 43 +++++++++++++++++++++++++++++++
2 files changed, 44 insertions(+), 15 deletions(-)
create mode 100644 arch/riscv/include/uapi/asm/sbi.h
diff --git a/arch/riscv/include/asm/sbi.h b/arch/riscv/include/asm/sbi.h
index 341e74238aa0..e196feaabb2e 100644
--- a/arch/riscv/include/asm/sbi.h
+++ b/arch/riscv/include/asm/sbi.h
@@ -10,13 +10,12 @@
#include <linux/types.h>
#include <linux/cpumask.h>
#include <linux/jump_label.h>
+#include <uapi/asm/sbi.h>
#ifdef CONFIG_RISCV_SBI
enum sbi_ext_id {
#ifdef CONFIG_RISCV_SBI_V01
SBI_EXT_0_1_SET_TIMER = 0x0,
- SBI_EXT_0_1_CONSOLE_PUTCHAR = 0x1,
- SBI_EXT_0_1_CONSOLE_GETCHAR = 0x2,
SBI_EXT_0_1_CLEAR_IPI = 0x3,
SBI_EXT_0_1_SEND_IPI = 0x4,
SBI_EXT_0_1_REMOTE_FENCE_I = 0x5,
@@ -37,13 +36,6 @@ enum sbi_ext_id {
SBI_EXT_NACL = 0x4E41434C,
SBI_EXT_FWFT = 0x46574654,
- /* Experimentals extensions must lie within this range */
- SBI_EXT_EXPERIMENTAL_START = 0x08000000,
- SBI_EXT_EXPERIMENTAL_END = 0x08FFFFFF,
-
- /* Vendor extensions must lie within this range */
- SBI_EXT_VENDOR_START = 0x09000000,
- SBI_EXT_VENDOR_END = 0x09FFFFFF,
};
enum sbi_ext_base_fid {
@@ -263,12 +255,6 @@ enum sbi_pmu_ctr_type {
#define SBI_PMU_STOP_FLAG_RESET BIT(0)
#define SBI_PMU_STOP_FLAG_TAKE_SNAPSHOT BIT(1)
-enum sbi_ext_dbcn_fid {
- SBI_EXT_DBCN_CONSOLE_WRITE = 0,
- SBI_EXT_DBCN_CONSOLE_READ = 1,
- SBI_EXT_DBCN_CONSOLE_WRITE_BYTE = 2,
-};
-
/* SBI STA (steal-time accounting) extension */
enum sbi_ext_sta_fid {
SBI_EXT_STA_STEAL_TIME_SET_SHMEM = 0,
diff --git a/arch/riscv/include/uapi/asm/sbi.h b/arch/riscv/include/uapi/asm/sbi.h
new file mode 100644
index 000000000000..d29ac0abeefe
--- /dev/null
+++ b/arch/riscv/include/uapi/asm/sbi.h
@@ -0,0 +1,43 @@
+/* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */
+/*
+ * Copyright (C) 2025 Lanxincomputing Corporation or its affiliates.
+ *
+ * Authors:
+ * BillXiang <xiangwencheng@...xincomputing.com>
+ */
+
+#ifndef _UAPI_ASM_RISCV_SBI_H
+#define _UAPI_ASM_RISCV_SBI_H
+
+
+enum SBI_EXT_ID {
+ /*
+ * The CONSOLE_GETCHAR/CONSOLE_PUTCHAR SBI calls cannot be
+ * handled in kernel so they will be forwarded to userspace by kvm.
+ */
+ SBI_EXT_0_1_CONSOLE_PUTCHAR = 0x1,
+ SBI_EXT_0_1_CONSOLE_GETCHAR = 0x2,
+ /*
+ * Both SBI experimental and vendor extensions are
+ * unconditionally forwarded to userspace by kvm.
+ */
+ /* Experimentals extensions must lie within this range */
+ SBI_EXT_EXPERIMENTAL_START = 0x08000000,
+ SBI_EXT_EXPERIMENTAL_END = 0x08FFFFFF,
+
+ /* Vendor extensions must lie within this range */
+ SBI_EXT_VENDOR_START = 0x09000000,
+ SBI_EXT_VENDOR_END = 0x09FFFFFF,
+};
+
+/*
+* The SBI debug console functions are unconditionally
+* forwarded to the userspace by kvm.
+*/
+enum sbi_ext_dbcn_fid {
+ SBI_EXT_DBCN_CONSOLE_WRITE = 0,
+ SBI_EXT_DBCN_CONSOLE_READ = 1,
+ SBI_EXT_DBCN_CONSOLE_WRITE_BYTE = 2,
+};
+
+#endif /* _UAPI_ASM_RISCV_SBI_H */
\ No newline at end of file
--
2.43.0
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