linux-kernel - [PATCH v4 10/10] vfio/fsl-mc: Add support for device reset

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]

Date:   Wed, 26 Aug 2020 12:33:15 +0300
From:   Diana Craciun <diana.craciun@....nxp.com>
To:     alex.williamson@...hat.com, kvm@...r.kernel.org
Cc:     linux-kernel@...r.kernel.org, bharatb.linux@...il.com,
        laurentiu.tudor@....com, Diana Craciun <diana.craciun@....nxp.com>
Subject: [PATCH v4 10/10] vfio/fsl-mc: Add support for device reset

Currently only resetting the DPRC container is supported which
will reset all the objects inside it. Resetting individual
objects is possible from the userspace by issueing commands
towards MC firmware.

Signed-off-by: Diana Craciun <diana.craciun@....nxp.com>
---
 drivers/vfio/fsl-mc/vfio_fsl_mc.c | 15 ++++++++++++++-
 1 file changed, 14 insertions(+), 1 deletion(-)

diff --git a/drivers/vfio/fsl-mc/vfio_fsl_mc.c b/drivers/vfio/fsl-mc/vfio_fsl_mc.c
index 27713aa86878..d17c5b3148ad 100644
--- a/drivers/vfio/fsl-mc/vfio_fsl_mc.c
+++ b/drivers/vfio/fsl-mc/vfio_fsl_mc.c
@@ -310,7 +310,20 @@ static long vfio_fsl_mc_ioctl(void *device_data, unsigned int cmd,
 	}
 	case VFIO_DEVICE_RESET:
 	{
-		return -ENOTTY;
+		int ret = 0;
+
+		struct fsl_mc_device *mc_dev = vdev->mc_dev;
+
+		/* reset is supported only for the DPRC */
+		if (!is_fsl_mc_bus_dprc(mc_dev))
+			return -ENOTTY;
+
+		ret = dprc_reset_container(mc_dev->mc_io, 0,
+					   mc_dev->mc_handle,
+					   mc_dev->obj_desc.id,
+					   DPRC_RESET_OPTION_NON_RECURSIVE);
+		return ret;
+
 	}
 	default:
 		return -ENOTTY;
-- 
2.17.1