[RFC kvm-unit-tests 03/27] arm: realm: Add RSI interface header

[Joey Gouly]

Add the defintions for the Realm Service Interface (RSI). RSI calls are a way
for the Realm to communicate with the RMM and request information/services.

Signed-off-by: Joey Gouly <joey.gouly@xxxxxxx>
---
 lib/arm64/asm/smc-rsi.h | 139 ++++++++++++++++++++++++++++++++++++++++
 1 file changed, 139 insertions(+)
 create mode 100644 lib/arm64/asm/smc-rsi.h

diff --git a/lib/arm64/asm/smc-rsi.h b/lib/arm64/asm/smc-rsi.h
new file mode 100644
index 00000000..cd05e9c6
--- /dev/null
+++ b/lib/arm64/asm/smc-rsi.h
@@ -0,0 +1,139 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+/*
+ * Copyright (C) 2022 Arm Limited.
+ * All rights reserved.
+ */
+#ifndef __SMC_RSI_H_
+#define __SMC_RSI_H_
+
+/*
+ * This file describes the Realm Services Interface (RSI) Application Binary
+ * Interface (ABI) for SMC calls made from within the Realm to the RMM and
+ * serviced by the RMM.
+ */
+
+#define SMC_RSI_CALL_BASE		0xC4000000
+
+/*
+ * The major version number of the RSI implementation.  Increase this whenever
+ * the binary format or semantics of the SMC calls change.
+ */
+#define RSI_ABI_VERSION_MAJOR		12
+
+/*
+ * The minor version number of the RSI implementation.  Increase this when
+ * a bug is fixed, or a feature is added without breaking binary compatibility.
+ */
+#define RSI_ABI_VERSION_MINOR		0
+
+#define RSI_ABI_VERSION			((RSI_ABI_VERSION_MAJOR << 16) | \
+					 RSI_ABI_VERSION_MINOR)
+
+#define RSI_ABI_VERSION_GET_MAJOR(_version) ((_version) >> 16)
+#define RSI_ABI_VERSION_GET_MINOR(_version) ((_version) & 0xFFFF)
+
+#define RSI_SUCCESS			0
+#define RSI_ERROR_INPUT			1
+#define RSI_ERROR_STATE			2
+#define RSI_INCOMPLETE			3
+#define RSI_ERROR_MEMORY		4
+
+#define SMC_RSI_FID(_x)			(SMC_RSI_CALL_BASE + (_x))
+
+#define SMC_RSI_ABI_VERSION			SMC_RSI_FID(0x190)
+
+/*
+ * arg1 == The IPA of token buffer
+ * arg2 == Challenge value, bytes:  0 -  7
+ * arg3 == Challenge value, bytes:  7 - 15
+ * arg4 == Challenge value, bytes: 16 - 23
+ * arg5 == Challenge value, bytes: 24 - 31
+ * arg6 == Challenge value, bytes: 32 - 39
+ * arg7 == Challenge value, bytes: 40 - 47
+ * arg8 == Challenge value, bytes: 48 - 55
+ * arg9 == Challenge value, bytes: 56 - 63
+ * ret0 == Status / error
+ */
+#define SMC_RSI_ATTEST_TOKEN_INIT	SMC_RSI_FID(0x194)
+
+/*
+ * arg1 == The IPA of token buffer
+ * ret0 == Status / error
+ * ret1 == Size of completed token in bytes
+ */
+#define SMC_RSI_ATTEST_TOKEN_CONTINUE	SMC_RSI_FID(0x195)
+
+/*
+ * arg1  == Index (1..4), which measurement (REM) to extend
+ * arg2  == Size of realm measurement in bytes, max 64 bytes
+ * arg3  == Measurement value, bytes:  0 -  7
+ * arg4  == Measurement value, bytes:  7 - 15
+ * arg5  == Measurement value, bytes: 16 - 23
+ * arg6  == Measurement value, bytes: 24 - 31
+ * arg7  == Measurement value, bytes: 32 - 39
+ * arg8  == Measurement value, bytes: 40 - 47
+ * arg9  == Measurement value, bytes: 48 - 55
+ * arg10 == Measurement value, bytes: 56 - 63
+ * ret0  == Status / error
+ */
+#define SMC_RSI_MEASUREMENT_EXTEND	SMC_RSI_FID(0x193)
+
+/*
+ * arg1 == Index (0..4), which measurement (RIM or REM) to read
+ * ret0 == Status / error
+ * ret1 == Measurement value, bytes:  0 -  7
+ * ret2 == Measurement value, bytes:  7 - 15
+ * ret3 == Measurement value, bytes: 16 - 23
+ * ret4 == Measurement value, bytes: 24 - 31
+ * ret5 == Measurement value, bytes: 32 - 39
+ * ret6 == Measurement value, bytes: 40 - 47
+ * ret7 == Measurement value, bytes: 48 - 55
+ * ret8 == Measurement value, bytes: 56 - 63
+ */
+#define SMC_RSI_MEASUREMENT_READ	SMC_RSI_FID(0x192)
+
+#ifndef __ASSEMBLY__
+
+struct rsi_realm_config {
+	union {
+		struct {
+			unsigned long ipa_width; /* Width of IPA in bits */
+		};
+		unsigned char __reserved0[0x1000];
+	};
+	/* Offset 0x1000 */
+};
+
+#endif /* __ASSEMBLY__ */
+
+/*
+ * arg0 == struct rsi_realm_config addr
+ */
+#define SMC_RSI_REALM_CONFIG		SMC_RSI_FID(0x196)
+
+/*
+ * arg0 == IPA address of target region
+ * arg1 == size of target region in bytes
+ * arg2 == RIPAS value
+ * ret0 == Status / error
+ * ret1 == Top of modified IPA range
+ */
+#define SMC_RSI_IPA_STATE_SET		SMC_RSI_FID(0x197)
+
+#define RSI_HOST_CALL_NR_GPRS		31
+
+#ifndef __ASSEMBLY__
+
+struct rsi_host_call {
+	unsigned int imm;
+	unsigned long gprs[RSI_HOST_CALL_NR_GPRS];
+};
+
+#endif /* __ASSEMBLY__ */
+
+/*
+ * arg0 == struct rsi_host_call addr
+ */
+#define SMC_RSI_HOST_CALL		SMC_RSI_FID(0x199)
+
+#endif /* __SMC_RSI_H_ */
-- 
2.17.1