linux-kernel - [PATCH v2 12/19] remoteproc: core: Add vdev support and force mode to resource amending function

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]

Date:   Wed, 31 Aug 2016 22:50:15 +0200
From:   Loic Pallardy <loic.pallardy@...com>
To:     <bjorn.andersson@...aro.org>, <ohad@...ery.com>,
        <lee.jones@...aro.org>
CC:     <loic.pallardy@...com>, <linux-remoteproc@...r.kernel.org>,
        <linux-kernel@...r.kernel.org>, <kernel@...inux.com>
Subject: [PATCH v2 12/19] remoteproc: core: Add vdev support and force mode to resource amending function

This patch proposes diverse updates to rproc_update_resource_table_entry
function:
- rename rproc_update_resource_table_entry to __update_rsc_tbl_entry to
  have shorter function name.
- add RSC_VDEV support
- add force mode resource even if resource already fixed on firmware side.

Signed-off-by: Loic Pallardy <loic.pallardy@...com>
---
 drivers/remoteproc/remoteproc_core.c | 27 ++++++++++++++++++++++-----
 1 file changed, 22 insertions(+), 5 deletions(-)

diff --git a/drivers/remoteproc/remoteproc_core.c b/drivers/remoteproc/remoteproc_core.c
index 30e9c70..aff1a00 100644
--- a/drivers/remoteproc/remoteproc_core.c
+++ b/drivers/remoteproc/remoteproc_core.c
@@ -1027,13 +1027,15 @@ static int __verify_rsc_tbl_entry(struct rproc *rproc,
 	return -EINVAL;
 }
 
-static int rproc_update_resource_table_entry(struct rproc *rproc,
+static int __update_rsc_tbl_entry(struct rproc *rproc,
 				struct rproc_request_resource *request,
-				struct resource_table *table, int size)
+				struct resource_table *table, int size,
+				bool force)
 {
 	struct fw_rsc_carveout *tblc, *newc;
 	struct fw_rsc_devmem *tbld, *newd;
 	struct fw_rsc_trace *tblt, *newt;
+	struct fw_rsc_vdev *tblv, *newv;
 	int updated = true;
 	int i;
 
@@ -1054,7 +1056,8 @@ static int rproc_update_resource_table_entry(struct rproc *rproc,
 				    sizeof(*tblc->name)))
 				break;
 
-			memcpy(tblc, newc, request->size);
+			if (tblc->pa == FW_RSC_ADDR_ANY || force)
+				memcpy(tblc, newc, request->size);
 
 			return updated;
 		case RSC_DEVMEM:
@@ -1079,6 +1082,20 @@ static int rproc_update_resource_table_entry(struct rproc *rproc,
 			memcpy(tblt, newt, request->size);
 
 			return updated;
+		case RSC_VDEV:
+			tblv = rsc;
+			newv = request->resource;
+			if (newv->id != tblv->id)
+				break;
+
+			if (request->size > (sizeof(*tblv) +
+				    tblv->num_of_vrings * sizeof(struct fw_rsc_vdev_vring) +
+				    tblv->config_len))
+				return -ENOSPC;
+
+			memcpy(tblv, newv, request->size);
+
+			return updated;
 		default:
 			dev_err(&rproc->dev,
 				"Unsupported resource type: %d\n",
@@ -1176,8 +1193,8 @@ rproc_apply_resource_overrides(struct rproc *rproc,
 		int updated = 0;
 
 		/* If we already have a table, update it with the new values. */
-		updated = rproc_update_resource_table_entry(rproc, resource,
-							    table, size);
+		updated = __update_rsc_tbl_entry(rproc, resource, table, size,
+						 false);
 		if (updated < 0) {
 			table = ERR_PTR(updated);
 			goto out;
-- 
1.9.1