From: Dhruva Gole Date: Tue, 30 Jan 2024 14:59:59 +0000 (+0530) Subject: firmware: ti_sci: fix the secure_hdr in do_xfer X-Git-Url: http://git.dujemihanovic.xyz/html/index.html?a=commitdiff_plain;h=0c4e36d65f6c25e5016235cc3f1e97c8d237f416;p=u-boot.git firmware: ti_sci: fix the secure_hdr in do_xfer The ti_sci driver in U-Boot has support for secure_msg as part of it's do_xfer function. This let's U-boot send secure messages during boot up. The protocol to send such secure messages is described as part of the struct ti_sci_secure_msg_hdr. As part of this, there are 2 fields for checksum and reserved that occupy the first 4 bytes of any secure message. This is called as the secure_hdr. As of now, the secure_hdr needs to be 0 init-ed before sending secure messages. However the existing code was never putting the zero-inited vars into the secure_buf, leading to possibility of the first 4 bytes of secure_buf being possibly garbage. Fix this by initialising the secure_hdr itself to the secure_buf location, thus when we make secure_hdr members 0, it automatically ensures the first 4 bytes of secure_buf are 0. Fixes: 32cd25128bd849 ("firmware: Add basic support for TI System Control Interface (TI SCI)") Reviewed-by: Nishanth Menon Signed-off-by: Dhruva Gole --- diff --git a/drivers/firmware/ti_sci.c b/drivers/firmware/ti_sci.c index 6e9f93e9a3..b77ac36af2 100644 --- a/drivers/firmware/ti_sci.c +++ b/drivers/firmware/ti_sci.c @@ -236,21 +236,21 @@ static int ti_sci_do_xfer(struct ti_sci_info *info, { struct k3_sec_proxy_msg *msg = &xfer->tx_message; u8 secure_buf[info->desc->max_msg_size]; - struct ti_sci_secure_msg_hdr secure_hdr; + struct ti_sci_secure_msg_hdr *secure_hdr = (struct ti_sci_secure_msg_hdr *)secure_buf; int ret; if (info->is_secure) { /* ToDo: get checksum of the entire message */ - secure_hdr.checksum = 0; - secure_hdr.reserved = 0; - memcpy(&secure_buf[sizeof(secure_hdr)], xfer->tx_message.buf, + secure_hdr->checksum = 0; + secure_hdr->reserved = 0; + memcpy(&secure_buf[sizeof(*secure_hdr)], xfer->tx_message.buf, xfer->tx_message.len); xfer->tx_message.buf = (u32 *)secure_buf; - xfer->tx_message.len += sizeof(secure_hdr); + xfer->tx_message.len += sizeof(*secure_hdr); if (xfer->rx_len) - xfer->rx_len += sizeof(secure_hdr); + xfer->rx_len += sizeof(*secure_hdr); } /* Send the message */