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arm-bsp/kernel: Fix TEE driver bug for corstone1000

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Fixes the Tee driver bug in corstone1000. It adds a
delay to fix a possible race-condition occurs during
FF-A calls. This is a temporary fix for the upcoming
release.

Signed-off-by: Emekcan Aras <emekcan.aras@arm.com>
Signed-off-by: Jon Mason <jon.mason@arm.com>
This commit is contained in:
Emekcan
2022-10-14 13:12:30 +01:00
committed by Jon Mason
parent 37ba0b162a
commit 13199c55c0
2 changed files with 42 additions and 0 deletions
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meta-arm-bsp/recipes-kernel/linux/files/corstone1000/0006-Adds-workaround-for-cs1k-specific-bug.patch
+41
View File
@@ -0,0 +1,41 @@
Upstream-Status: Inappropriate[Temporary bugfix]
Signed-off-by: Emekcan Aras <emekcan.aras@arm.com>
From f1a869ea986305a6fb20f3c770c11778a898b86d Mon Sep 17 00:00:00 2001
From: Emekcan <emekcan.aras@arm.com>
Date: Thu, 13 Oct 2022 20:53:42 +0100
Subject: [PATCH] Adds workaround for cs1k specific bug
Adds a temporary workaround to solve a possible
race-conditioning issue in the tee driver
for corstone1000.
Signed-off-by: Emekcan Aras <emekcan.aras@arm.com>
---
drivers/firmware/arm_ffa/driver.c | 3 ++-
1 file changed, 2 insertions(+), 1 deletion(-)
diff --git a/drivers/firmware/arm_ffa/driver.c b/drivers/firmware/arm_ffa/driver.c
index ec731e9e942b..2a3ef649935e 100644
--- a/drivers/firmware/arm_ffa/driver.c
+++ b/drivers/firmware/arm_ffa/driver.c
@@ -32,6 +32,7 @@
#include <linux/scatterlist.h>
#include <linux/slab.h>
#include <linux/uuid.h>
+#include <linux/delay.h>
#include "common.h"
@@ -344,7 +345,7 @@ static int ffa_msg_send_direct_req(u16 src_id, u16 dst_id, bool mode_32bit,
{
u32 req_id, resp_id, src_dst_ids = PACK_TARGET_INFO(src_id, dst_id);
ffa_value_t ret;
-
+ msleep(1);
if (mode_32bit) {
req_id = FFA_MSG_SEND_DIRECT_REQ;
resp_id = FFA_MSG_SEND_DIRECT_RESP;
--
2.17.1
meta-arm-bsp/recipes-kernel/linux/linux-arm-platforms.inc
+1
View File
@@ -49,6 +49,7 @@ SRC_URI:append:corstone1000 = " \
file://0003-Add-rpmsg-driver-for-corstone1000.patch \
file://0004-rpmsg-arm-fix-return-value.patch \
file://0005-rpmsg-arm-update-chrdev-to-ctrldev-registration.patch \
file://0006-Adds-workaround-for-cs1k-specific-bug.patch \
"
SRC_URI:append:corstone1000 = " ${@bb.utils.contains('MACHINE_FEATURES', \