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mink: Add support of yield() interface in smcinvoke

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When trusted environment is busy, it may ask HLOS to yield i.e.
retry. If HLOS does not have this functionality, it may result in
invocation failure.

Change-Id: I33abfce50bb4c6c88fd51a83a6fe3d6af9b3696a
Signed-off-by: Dinesh K Garg <dineshg@codeaurora.org>
This commit is contained in:
Dinesh K Garg
2020-01-31 15:44:49 -08:00
parent 59858a1c27
commit a58cd8b7d2
2 changed files with 13 additions and 4 deletions
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14
drivers/soc/qcom/smcinvoke.c
View File

@@ -827,9 +827,17 @@ static void process_kernel_obj(void *buf, size_t buf_len)
{
struct smcinvoke_tzcb_req *cb_req = buf;
cb_req->result = (cb_req->hdr.op == OBJECT_OP_MAP_REGION) ?
smcinvoke_map_mem_region(buf, buf_len) :
OBJECT_ERROR_INVALID;
switch (cb_req->hdr.op) {
case OBJECT_OP_MAP_REGION:
cb_req->result = smcinvoke_map_mem_region(buf, buf_len);
break;
case OBJECT_OP_YIELD:
cb_req->result = OBJECT_OK;
break;
default:
cb_req->result = OBJECT_ERROR_INVALID;
break;
}
}
static void process_mem_obj(void *buf, size_t buf_len)

3
drivers/soc/qcom/smcinvoke_object.h
View File

@@ -1,6 +1,6 @@
/* SPDX-License-Identifier: GPL-2.0-only */
/*
* Copyright (c) 2016-2019, The Linux Foundation. All rights reserved.
* Copyright (c) 2016-2020, The Linux Foundation. All rights reserved.
*/
#ifndef __SMCINVOKE_OBJECT_H
#define __SMCINVOKE_OBJECT_H
@@ -16,6 +16,7 @@
#define OBJECT_OP_RELEASE (OBJECT_OP_METHOD_MASK - 0)
#define OBJECT_OP_RETAIN (OBJECT_OP_METHOD_MASK - 1)
#define OBJECT_OP_MAP_REGION 0
#define OBJECT_OP_YIELD 1
#define OBJECT_COUNTS_MAX_BI 0xF
#define OBJECT_COUNTS_MAX_BO 0xF