On 2/14/25 2:13 AM, Steven Price wrote:
The wrappers make the call sites easier to read and deal with the
boiler plate of handling the error codes from the RMM.
Signed-off-by: Steven Price <steven.price@xxxxxxx>
---
Changes from v5:
* Further improve comments
Changes from v4:
* Improve comments
Changes from v2:
* Make output arguments optional.
* Mask RIPAS value rmi_rtt_read_entry()
* Drop unused rmi_rtt_get_phys()
---
arch/arm64/include/asm/rmi_cmds.h | 508 ++++++++++++++++++++++++++++++
1 file changed, 508 insertions(+)
create mode 100644 arch/arm64/include/asm/rmi_cmds.h
With the following nitpicks addressed:
Reviewed-by: Gavin Shan <gshan@xxxxxxxxxx>
diff --git a/arch/arm64/include/asm/rmi_cmds.h b/arch/arm64/include/asm/rmi_cmds.h
new file mode 100644
index 000000000000..043b7ff278ee
--- /dev/null
+++ b/arch/arm64/include/asm/rmi_cmds.h
@@ -0,0 +1,508 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+/*
+ * Copyright (C) 2023 ARM Ltd.
+ */
+
+#ifndef __ASM_RMI_CMDS_H
+#define __ASM_RMI_CMDS_H
+
[...]
+
+/**
+ * rmi_rec_aux_count() - Get number of auxiliary granules required
+ * @rd: PA of the RD
+ * @aux_count: Number of pages written to this pointer
^^^^^^^^^^^^^^^
Number of granules
+ *
+ * A REC may require extra auxiliary pages to be delegated for the RMM to
^^^^^
granules
+ * store metadata (not visible to the normal world) in. This function provides
+ * the number of pages that are required.
^^^^^
granules
+ *
+ * Return: RMI return code
+ */
+static inline int rmi_rec_aux_count(unsigned long rd, unsigned long *aux_count)
+{
+ struct arm_smccc_res res;
+
+ arm_smccc_1_1_invoke(SMC_RMI_REC_AUX_COUNT, rd, &res);
+
+ if (aux_count)
+ *aux_count = res.a1;
+ return res.a0;
+}
+
+/**
+ * rmi_rec_create() - Create a REC
+ * @rd: PA of the RD
+ * @rec: PA of the target REC
+ * @params_ptr: PA of REC parameters
+ *
+ * Create a REC using the parameters specified in the struct rec_params pointed
+ * to by @params_ptr.
+ *
+ * Return: RMI return code
+ */
+static inline int rmi_rec_create(unsigned long rd, unsigned long rec,
+ unsigned long params_ptr)
+{
+ struct arm_smccc_res res;
+
+ arm_smccc_1_1_invoke(SMC_RMI_REC_CREATE, rd, rec, params_ptr, &res);
+
+ return res.a0;
+}
+
'params_ptr' may be renamed to 'params'.
[...]
+#endif /* __ASM_RMI_CMDS_H */
Thanks,
Gavin
