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From: Steven Price <steven.price@arm.com>
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Cc: Steven Price <steven.price@arm.com>,
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	Joey Gouly <joey.gouly@arm.com>,
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	Fuad Tabba <tabba@google.com>,
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	Ganapatrao Kulkarni <gankulkarni@os.amperecomputing.com>
Subject: [PATCH v3 05/43] arm64: RME: Add SMC definitions for calling the RMM
Date: Mon, 10 Jun 2024 14:41:24 +0100
Message-Id: <20240610134202.54893-6-steven.price@arm.com>
In-Reply-To: <20240610134202.54893-1-steven.price@arm.com>
References: <20240610134202.54893-1-steven.price@arm.com>
Precedence: bulk
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The RMM (Realm Management Monitor) provides functionality that can be
accessed by SMC calls from the host.

The SMC definitions are based on DEN0137[1] version 1.0-eac5

[1] https://developer.arm.com/documentation/den0137/1-0eac5/

Signed-off-by: Steven Price <steven.price@arm.com>
---
Changes since v2:
 * Fix specification link.
 * Rename rec_entry->rec_enter to match spec.
 * Fix size of pmu_ovf_status to match spec.
---
 arch/arm64/include/asm/rmi_smc.h | 251 +++++++++++++++++++++++++++++++
 1 file changed, 251 insertions(+)
 create mode 100644 arch/arm64/include/asm/rmi_smc.h

diff --git a/arch/arm64/include/asm/rmi_smc.h b/arch/arm64/include/asm/rmi_smc.h
new file mode 100644
index 000000000000..fb8d9025c6e9
--- /dev/null
+++ b/arch/arm64/include/asm/rmi_smc.h
@@ -0,0 +1,251 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+/*
+ * Copyright (C) 2023-2024 ARM Ltd.
+ *
+ * The values and structures in this file are from the Realm Management Monitor
+ * specification (DEN0137) version 1.0 EAC5:
+ * https://developer.arm.com/documentation/den0137/1-0eac5/
+ */
+
+#ifndef __ASM_RME_SMC_H
+#define __ASM_RME_SMC_H
+
+#include <linux/arm-smccc.h>
+
+#define SMC_RxI_CALL(func)				\
+	ARM_SMCCC_CALL_VAL(ARM_SMCCC_FAST_CALL,		\
+			   ARM_SMCCC_SMC_64,		\
+			   ARM_SMCCC_OWNER_STANDARD,	\
+			   (func))
+
+#define SMC_RMI_DATA_CREATE		SMC_RxI_CALL(0x0153)
+#define SMC_RMI_DATA_CREATE_UNKNOWN	SMC_RxI_CALL(0x0154)
+#define SMC_RMI_DATA_DESTROY		SMC_RxI_CALL(0x0155)
+#define SMC_RMI_FEATURES		SMC_RxI_CALL(0x0165)
+#define SMC_RMI_GRANULE_DELEGATE	SMC_RxI_CALL(0x0151)
+#define SMC_RMI_GRANULE_UNDELEGATE	SMC_RxI_CALL(0x0152)
+#define SMC_RMI_PSCI_COMPLETE		SMC_RxI_CALL(0x0164)
+#define SMC_RMI_REALM_ACTIVATE		SMC_RxI_CALL(0x0157)
+#define SMC_RMI_REALM_CREATE		SMC_RxI_CALL(0x0158)
+#define SMC_RMI_REALM_DESTROY		SMC_RxI_CALL(0x0159)
+#define SMC_RMI_REC_AUX_COUNT		SMC_RxI_CALL(0x0167)
+#define SMC_RMI_REC_CREATE		SMC_RxI_CALL(0x015a)
+#define SMC_RMI_REC_DESTROY		SMC_RxI_CALL(0x015b)
+#define SMC_RMI_REC_ENTER		SMC_RxI_CALL(0x015c)
+#define SMC_RMI_RTT_CREATE		SMC_RxI_CALL(0x015d)
+#define SMC_RMI_RTT_DESTROY		SMC_RxI_CALL(0x015e)
+#define SMC_RMI_RTT_FOLD		SMC_RxI_CALL(0x0166)
+#define SMC_RMI_RTT_INIT_RIPAS		SMC_RxI_CALL(0x0168)
+#define SMC_RMI_RTT_MAP_UNPROTECTED	SMC_RxI_CALL(0x015f)
+#define SMC_RMI_RTT_READ_ENTRY		SMC_RxI_CALL(0x0161)
+#define SMC_RMI_RTT_SET_RIPAS		SMC_RxI_CALL(0x0169)
+#define SMC_RMI_RTT_UNMAP_UNPROTECTED	SMC_RxI_CALL(0x0162)
+#define SMC_RMI_VERSION			SMC_RxI_CALL(0x0150)
+
+#define RMI_ABI_MAJOR_VERSION	1
+#define RMI_ABI_MINOR_VERSION	0
+
+#define RMI_UNASSIGNED			0
+#define RMI_ASSIGNED			1
+#define RMI_TABLE			2
+
+#define RMI_ABI_VERSION_GET_MAJOR(version) ((version) >> 16)
+#define RMI_ABI_VERSION_GET_MINOR(version) ((version) & 0xFFFF)
+#define RMI_ABI_VERSION(major, minor)      (((major) << 16) | (minor))
+
+#define RMI_RETURN_STATUS(ret)		((ret) & 0xFF)
+#define RMI_RETURN_INDEX(ret)		(((ret) >> 8) & 0xFF)
+
+#define RMI_SUCCESS		0
+#define RMI_ERROR_INPUT		1
+#define RMI_ERROR_REALM		2
+#define RMI_ERROR_REC		3
+#define RMI_ERROR_RTT		4
+
+#define RMI_EMPTY		0
+#define RMI_RAM			1
+#define RMI_DESTROYED		2
+
+#define RMI_NO_MEASURE_CONTENT	0
+#define RMI_MEASURE_CONTENT	1
+
+#define RMI_FEATURE_REGISTER_0_S2SZ		GENMASK(7, 0)
+#define RMI_FEATURE_REGISTER_0_LPA2		BIT(8)
+#define RMI_FEATURE_REGISTER_0_SVE_EN		BIT(9)
+#define RMI_FEATURE_REGISTER_0_SVE_VL		GENMASK(13, 10)
+#define RMI_FEATURE_REGISTER_0_NUM_BPS		GENMASK(17, 14)
+#define RMI_FEATURE_REGISTER_0_NUM_WPS		GENMASK(21, 18)
+#define RMI_FEATURE_REGISTER_0_PMU_EN		BIT(22)
+#define RMI_FEATURE_REGISTER_0_PMU_NUM_CTRS	GENMASK(27, 23)
+#define RMI_FEATURE_REGISTER_0_HASH_SHA_256	BIT(28)
+#define RMI_FEATURE_REGISTER_0_HASH_SHA_512	BIT(29)
+
+#define RMI_REALM_PARAM_FLAG_LPA2		BIT(0)
+#define RMI_REALM_PARAM_FLAG_SVE		BIT(1)
+#define RMI_REALM_PARAM_FLAG_PMU		BIT(2)
+
+/*
+ * Note many of these fields are smaller than u64 but all fields have u64
+ * alignment, so use u64 to ensure correct alignment.
+ */
+struct realm_params {
+	union { /* 0x0 */
+		struct {
+			u64 flags;
+			u64 s2sz;
+			u64 sve_vl;
+			u64 num_bps;
+			u64 num_wps;
+			u64 pmu_num_ctrs;
+			u64 hash_algo;
+		};
+		u8 padding_1[0x400];
+	};
+	union { /* 0x400 */
+		u8 rpv[64];
+		u8 padding_2[0x400];
+	};
+	union { /* 0x800 */
+		struct {
+			u64 vmid;
+			u64 rtt_base;
+			s64 rtt_level_start;
+			u64 rtt_num_start;
+		};
+		u8 padding_3[0x800];
+	};
+};
+
+/*
+ * The number of GPRs (starting from X0) that are
+ * configured by the host when a REC is created.
+ */
+#define REC_CREATE_NR_GPRS		8
+
+#define REC_PARAMS_FLAG_RUNNABLE	BIT_ULL(0)
+
+#define REC_PARAMS_AUX_GRANULES		16
+
+struct rec_params {
+	union { /* 0x0 */
+		u64 flags;
+		u8 padding1[0x100];
+	};
+	union { /* 0x100 */
+		u64 mpidr;
+		u8 padding2[0x100];
+	};
+	union { /* 0x200 */
+		u64 pc;
+		u8 padding3[0x100];
+	};
+	union { /* 0x300 */
+		u64 gprs[REC_CREATE_NR_GPRS];
+		u8 padding4[0x500];
+	};
+	union { /* 0x800 */
+		struct {
+			u64 num_rec_aux;
+			u64 aux[REC_PARAMS_AUX_GRANULES];
+		};
+		u8 padding5[0x800];
+	};
+};
+
+#define RMI_EMULATED_MMIO		BIT(0)
+#define RMI_INJECT_SEA			BIT(1)
+#define RMI_TRAP_WFI			BIT(2)
+#define RMI_TRAP_WFE			BIT(3)
+#define RMI_RIPAS_RESPONSE		BIT(4)
+
+#define REC_RUN_GPRS			31
+#define REC_GIC_NUM_LRS			16
+
+struct rec_enter {
+	union { /* 0x000 */
+		u64 flags;
+		u8 padding0[0x200];
+	};
+	union { /* 0x200 */
+		u64 gprs[REC_RUN_GPRS];
+		u8 padding2[0x100];
+	};
+	union { /* 0x300 */
+		struct {
+			u64 gicv3_hcr;
+			u64 gicv3_lrs[REC_GIC_NUM_LRS];
+		};
+		u8 padding3[0x100];
+	};
+	u8 padding4[0x400];
+};
+
+#define RMI_EXIT_SYNC			0x00
+#define RMI_EXIT_IRQ			0x01
+#define RMI_EXIT_FIQ			0x02
+#define RMI_EXIT_PSCI			0x03
+#define RMI_EXIT_RIPAS_CHANGE		0x04
+#define RMI_EXIT_HOST_CALL		0x05
+#define RMI_EXIT_SERROR			0x06
+
+struct rec_exit {
+	union { /* 0x000 */
+		u8 exit_reason;
+		u8 padding0[0x100];
+	};
+	union { /* 0x100 */
+		struct {
+			u64 esr;
+			u64 far;
+			u64 hpfar;
+		};
+		u8 padding1[0x100];
+	};
+	union { /* 0x200 */
+		u64 gprs[REC_RUN_GPRS];
+		u8 padding2[0x100];
+	};
+	union { /* 0x300 */
+		struct {
+			u64 gicv3_hcr;
+			u64 gicv3_lrs[REC_GIC_NUM_LRS];
+			u64 gicv3_misr;
+			u64 gicv3_vmcr;
+		};
+		u8 padding3[0x100];
+	};
+	union { /* 0x400 */
+		struct {
+			u64 cntp_ctl;
+			u64 cntp_cval;
+			u64 cntv_ctl;
+			u64 cntv_cval;
+		};
+		u8 padding4[0x100];
+	};
+	union { /* 0x500 */
+		struct {
+			u64 ripas_base;
+			u64 ripas_top;
+			u64 ripas_value;
+		};
+		u8 padding5[0x100];
+	};
+	union { /* 0x600 */
+		u16 imm;
+		u8 padding6[0x100];
+	};
+	union { /* 0x700 */
+		struct {
+			u8 pmu_ovf_status;
+		};
+		u8 padding7[0x100];
+	};
+};
+
+struct rec_run {
+	struct rec_enter enter;
+	struct rec_exit exit;
+};
+
+#endif
-- 
2.34.1