misc: fastrpc: Add support to secure memory map

This patch adds support to secure memory allocations for DSP. It repurposes the reserved field in struct fastrpc_invoke_args to add attributes to invoke request, for example to setup a secure memory map for dsp. Secure memory is assigned to DSP Virtual Machine IDs using Qualcomm SCM calls.

Vamsi Krishna Gattupalli committed 4 years ago

Commit e90d9111 parent 87ccc143 files · +61 −10Browse files

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include/uapi/misc/fastrpc.h+4−1

@@ -63,11 +63,14 @@ enum fastrpc_proc_attr { · 62 unmodified lines
63	63	FASTRPC_MODE_PRIVILEGED = (1 << 6),
64	64	};
65	65
	66	+/* Fastrpc attribute for memory protection of buffers */
	67	+#define FASTRPC_ATTR_SECUREMAP (1)
	68	+
66	69	struct fastrpc_invoke_args {
67	70	__u64 ptr;
68	71	__u64 length;
69	72	__s32 fd;
70		− __u32 reserved;
	73	+ __u32 attr;
71	74	};
72	75
73	76	struct fastrpc_invoke {