linux-kernel - [PATCH v5 4/5] remoteproc: qcom: q6v5-mss: Add custom dump function for modem

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Message-Id: <20181017135527.30592-5-sibis@codeaurora.org>
Date:   Wed, 17 Oct 2018 19:25:26 +0530
From:   Sibi Sankar <sibis@...eaurora.org>
To:     bjorn.andersson@...aro.org, ohad@...ery.com
Cc:     linux-remoteproc@...r.kernel.org, linux-kernel@...r.kernel.org,
        linux-arm-msm@...r.kernel.org, tsoni@...eaurora.org,
        sricharan@...eaurora.org, akdwived@...eaurora.org,
        kyan@...eaurora.org, Sibi Sankar <sibis@...eaurora.org>
Subject: [PATCH v5 4/5] remoteproc: qcom: q6v5-mss: Add custom dump function for modem

The per segment dump function is responsible for loading the mba
before device memory segments associated with coredump can be populated
and for cleaning up the resources post coredump.

Signed-off-by: Sibi Sankar <sibis@...eaurora.org>
---
 drivers/remoteproc/qcom_q6v5_mss.c | 33 ++++++++++++++++++++++++++++++
 1 file changed, 33 insertions(+)

diff --git a/drivers/remoteproc/qcom_q6v5_mss.c b/drivers/remoteproc/qcom_q6v5_mss.c
index 87d7f4d0c176..0d3b9d70823e 100644
--- a/drivers/remoteproc/qcom_q6v5_mss.c
+++ b/drivers/remoteproc/qcom_q6v5_mss.c
@@ -168,6 +168,9 @@ struct q6v5 {
 	bool running;
 
 	bool dump_mba_loaded;
+	unsigned long dump_segment_mask;
+	unsigned long dump_complete_mask;
+
 	phys_addr_t mba_phys;
 	void *mba_region;
 	size_t mba_size;
@@ -961,6 +964,33 @@ static int q6v5_mpss_load(struct q6v5 *qproc)
 	return ret < 0 ? ret : 0;
 }
 
+static void qcom_q6v5_dump_segment(struct rproc *rproc,
+				   struct rproc_dump_segment *segment,
+				   void *dest)
+{
+	int ret = 0;
+	struct q6v5 *qproc = rproc->priv;
+	unsigned long mask = BIT((unsigned long)segment->priv);
+	void *ptr = rproc_da_to_va(rproc, segment->da, segment->size);
+
+	/* Unlock mba before copying segments */
+	if (!qproc->dump_mba_loaded)
+		ret = q6v5_mba_load(qproc);
+
+	if (!ptr || ret)
+		memset(dest, 0xff, segment->size);
+	else
+		memcpy(dest, ptr, segment->size);
+
+	qproc->dump_segment_mask |= mask;
+
+	/* Reclaim mba after copying segments */
+	if (qproc->dump_segment_mask == qproc->dump_complete_mask) {
+		if (qproc->dump_mba_loaded)
+			q6v5_mba_reclaim(qproc);
+	}
+}
+
 static int q6v5_start(struct rproc *rproc)
 {
 	struct q6v5 *qproc = (struct q6v5 *)rproc->priv;
@@ -989,6 +1019,9 @@ static int q6v5_start(struct rproc *rproc)
 	if (xfermemop_ret)
 		dev_err(qproc->dev,
 			"Failed to reclaim mba buffer system may become unstable\n");
+
+	/* Reset Dump Segment Mask */
+	qproc->dump_segment_mask = 0;
 	qproc->running = true;
 
 	return 0;
-- 
The Qualcomm Innovation Center, Inc. is a member of the Code Aurora Forum,
a Linux Foundation Collaborative Project