linux-kernel - [PATCH 4/4] misc: fastrpc: add support for gdsp remoteproc

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 for Android: free password hash cracker in your pocket

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

Message-ID: <20250912131302.303199-5-srini@kernel.org>
Date: Fri, 12 Sep 2025 14:13:02 +0100
From: srini@...nel.org
To: gregkh@...uxfoundation.org
Cc: linux-kernel@...r.kernel.org,
	Ling Xu <quic_lxu5@...cinc.com>,
	Dmitry Baryshkov <dmitry.baryshkov@....qualcomm.com>,
	Ekansh Gupta <ekansh.gupta@....qualcomm.com>,
	Srinivas Kandagatla <srini@...nel.org>
Subject: [PATCH 4/4] misc: fastrpc: add support for gdsp remoteproc

From: Ling Xu <quic_lxu5@...cinc.com>

Some platforms (like lemans) feature one or more GPDSPs (General
Purpose DSPs). Similar to other kinds of Hexagon DSPs, they provide
a FastRPC implementation, allowing code execution in both signed and
unsigned protection domains. Extend the checks to allow domain names
starting with "gdsp" (possibly followed by an index).

Reviewed-by: Dmitry Baryshkov <dmitry.baryshkov@....qualcomm.com>
Reviewed-by: Ekansh Gupta <ekansh.gupta@....qualcomm.com>
Signed-off-by: Ling Xu <quic_lxu5@...cinc.com>
Signed-off-by: Srinivas Kandagatla <srini@...nel.org>
---
 drivers/misc/fastrpc.c | 6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

diff --git a/drivers/misc/fastrpc.c b/drivers/misc/fastrpc.c
index 93ec587fcab6..621bce7e101c 100644
--- a/drivers/misc/fastrpc.c
+++ b/drivers/misc/fastrpc.c
@@ -27,6 +27,7 @@
 #define MDSP_DOMAIN_ID (1)
 #define SDSP_DOMAIN_ID (2)
 #define CDSP_DOMAIN_ID (3)
+#define GDSP_DOMAIN_ID (4)
 #define FASTRPC_MAX_SESSIONS	14
 #define FASTRPC_MAX_VMIDS	16
 #define FASTRPC_ALIGN		128
@@ -2276,6 +2277,8 @@ static int fastrpc_get_domain_id(const char *domain)
 		return MDSP_DOMAIN_ID;
 	else if (!strncmp(domain, "sdsp", 4))
 		return SDSP_DOMAIN_ID;
+	else if (!strncmp(domain, "gdsp", 4))
+		return GDSP_DOMAIN_ID;
 
 	return -EINVAL;
 }
@@ -2345,13 +2348,14 @@ static int fastrpc_rpmsg_probe(struct rpmsg_device *rpdev)
 	case ADSP_DOMAIN_ID:
 	case MDSP_DOMAIN_ID:
 	case SDSP_DOMAIN_ID:
-		/* Unsigned PD offloading is only supported on CDSP */
+		/* Unsigned PD offloading is only supported on CDSP and GDSP */
 		data->unsigned_support = false;
 		err = fastrpc_device_register(rdev, data, secure_dsp, domain);
 		if (err)
 			goto err_free_data;
 		break;
 	case CDSP_DOMAIN_ID:
+	case GDSP_DOMAIN_ID:
 		data->unsigned_support = true;
 		/* Create both device nodes so that we can allow both Signed and Unsigned PD */
 		err = fastrpc_device_register(rdev, data, true, domain);
-- 
2.50.0