Hi Steven
On 12/04/2024 09:42, Steven Price wrote:
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@xxxxxxx>
---
arch/arm64/include/asm/rmi_smc.h | 250 +++++++++++++++++++++++++++++++
1 file changed, 250 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..c205efdb18d8
--- /dev/null
+++ b/arch/arm64/include/asm/rmi_smc.h
@@ -0,0 +1,250 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+/*
+ * Copyright (C) 2023 ARM Ltd.
+ *
+ * The values and structures in this file are from the Realm Management Monitor
+ * specification (DEN0137) version A-bet0:
+ * https://developer.arm.com/documentation/den0137/1-0bet0/
This should now point to eac5 instead.
+ */
+
+#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)
For completeness, we could add :
#define RMI_RIPAS_RESPONSE BIT(4)
Not sure if we use it later in the series.
+
+#define REC_RUN_GPRS 31
+#define REC_GIC_NUM_LRS 16
+
+struct rec_entry {
+ 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];
+};
+
+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 {
+ u64 pmu_ovf_status;
This is u8 as per section B4.4.10 RmiPmuOverflowStatus type.
+ };
+ u8 padding7[0x100];
+ };
+};
+
+struct rec_run {
+ struct rec_entry entry;
+ struct rec_exit exit;
+};
+
+#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
Minor nit: Like the other definitions, it may be good to keep the
defintions of the "exit_reason" above the field declaration.
Rest looks fine to me.
Suzuki
+
+#endif
