linux-kernel - [PATCH v2 3/3] RISC-V: Move SBI related macros under uapi.

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Date:   Thu, 26 Sep 2019 17:09:15 -0700
From:   Atish Patra <atish.patra@....com>
To:     linux-kernel@...r.kernel.org
Cc:     Atish Patra <atish.patra@....com>,
        Alan Kao <alankao@...estech.com>,
        Albert Ou <aou@...s.berkeley.edu>,
        Allison Randal <allison@...utok.net>,
        Anup Patel <anup@...infault.org>, Gary Guo <gary@...yguo.net>,
        Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        linux-riscv@...ts.infradead.org,
        Mike Rapoport <rppt@...ux.ibm.com>,
        Palmer Dabbelt <palmer@...ive.com>,
        Paul Walmsley <paul.walmsley@...ive.com>,
        Thomas Gleixner <tglx@...utronix.de>
Subject: [PATCH v2 3/3] RISC-V: Move SBI related macros under uapi.

All SBI related macros can be reused by KVM RISC-V and userspace tools
such as kvmtool, qemu-kvm. SBI calls can also be emulated by userspace
if required. Any future vendor extensions can leverage this to emulate
the specific extension in userspace instead of kernel.

Signed-off-by: Atish Patra <atish.patra@....com>
---
 arch/riscv/include/asm/sbi.h      | 37 +-----------------------
 arch/riscv/include/uapi/asm/sbi.h | 48 +++++++++++++++++++++++++++++++
 2 files changed, 49 insertions(+), 36 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 279b7f10b3c2..902b83041111 100644
--- a/arch/riscv/include/asm/sbi.h
+++ b/arch/riscv/include/asm/sbi.h
@@ -7,42 +7,7 @@
 #define _ASM_RISCV_SBI_H
 
 #include <linux/types.h>
-
-enum sbi_ext_id {
-	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,
-	SBI_EXT_0_1_REMOTE_SFENCE_VMA = 0x6,
-	SBI_EXT_0_1_REMOTE_SFENCE_VMA_ASID = 0x7,
-	SBI_EXT_0_1_SHUTDOWN = 0x8,
-	SBI_EXT_BASE = 0x10,
-};
-
-enum sbi_ext_base_fid {
-	SBI_BASE_GET_SPEC_VERSION = 0,
-	SBI_BASE_GET_IMP_ID,
-	SBI_BASE_GET_IMP_VERSION,
-	SBI_BASE_PROBE_EXT,
-	SBI_BASE_GET_MVENDORID,
-	SBI_BASE_GET_MARCHID,
-	SBI_BASE_GET_MIMPID,
-};
-
-#define SBI_SPEC_VERSION_DEFAULT	0x1
-#define SBI_SPEC_VERSION_MAJOR_OFFSET	24
-#define SBI_SPEC_VERSION_MAJOR_MASK	0x7f
-#define SBI_SPEC_VERSION_MINOR_MASK	0xffffff
-
-/* SBI return error codes */
-#define SBI_SUCCESS		0
-#define SBI_ERR_FAILURE		-1
-#define SBI_ERR_NOT_SUPPORTED	-2
-#define SBI_ERR_INVALID_PARAM   -3
-#define SBI_ERR_DENIED		-4
-#define SBI_ERR_INVALID_ADDRESS -5
+#include <uapi/asm/sbi.h>
 
 extern unsigned long sbi_spec_version;
 struct sbiret {
diff --git a/arch/riscv/include/uapi/asm/sbi.h b/arch/riscv/include/uapi/asm/sbi.h
new file mode 100644
index 000000000000..2e09ee52c346
--- /dev/null
+++ b/arch/riscv/include/uapi/asm/sbi.h
@@ -0,0 +1,48 @@
+/* SPDX-License-Identifier: GPL-2.0-only */
+/*
+ * Common SBI related defines and macros to be used by RISC-V kernel,
+ * RISC-V KVM and userspace.
+ *
+ * Copyright (c) 2019 Western Digital Corporation or its affiliates.
+ */
+
+#ifndef _UAPI_ASM_RISCV_SBI_H
+#define _UAPI_ASM_RISCV_SBI_H
+
+enum sbi_ext_id {
+	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,
+	SBI_EXT_0_1_REMOTE_SFENCE_VMA = 0x6,
+	SBI_EXT_0_1_REMOTE_SFENCE_VMA_ASID = 0x7,
+	SBI_EXT_0_1_SHUTDOWN = 0x8,
+	SBI_EXT_BASE = 0x10,
+};
+
+enum sbi_ext_base_fid {
+	SBI_BASE_GET_SPEC_VERSION = 0,
+	SBI_BASE_GET_IMP_ID,
+	SBI_BASE_GET_IMP_VERSION,
+	SBI_BASE_PROBE_EXT,
+	SBI_BASE_GET_MVENDORID,
+	SBI_BASE_GET_MARCHID,
+	SBI_BASE_GET_MIMPID,
+};
+
+#define SBI_SPEC_VERSION_DEFAULT	0x1
+#define SBI_SPEC_VERSION_MAJOR_OFFSET	24
+#define SBI_SPEC_VERSION_MAJOR_MASK	0x7f
+#define SBI_SPEC_VERSION_MINOR_MASK	0xffffff
+
+/* SBI return error codes */
+#define SBI_SUCCESS		0
+#define SBI_ERR_FAILURE		-1
+#define SBI_ERR_NOT_SUPPORTED	-2
+#define SBI_ERR_INVALID_PARAM   -3
+#define SBI_ERR_DENIED		-4
+#define SBI_ERR_INVALID_ADDRESS -5
+
+#endif
-- 
2.21.0