49 lines
1.4 KiB
Diff
49 lines
1.4 KiB
Diff
From a548dc00536e2cc6e7e7f95487f5261b3133a0d7 Mon Sep 17 00:00:00 2001
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From: Diana Craciun <diana.craciun@nxp.com>
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Date: Wed, 18 Sep 2019 18:26:14 +0300
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Subject: [PATCH] vfio/fsl-mc: Implement VFIO_DEVICE_GET_INFO ioctl
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Allow userspace to get fsl-mc device info (number of regions
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and irqs).
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Signed-off-by: Bharat Bhushan <Bharat.Bhushan@nxp.com>
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Signed-off-by: Diana Craciun <diana.craciun@nxp.com>
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---
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drivers/vfio/fsl-mc/vfio_fsl_mc.c | 22 +++++++++++++++++++++-
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1 file changed, 21 insertions(+), 1 deletion(-)
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--- a/drivers/vfio/fsl-mc/vfio_fsl_mc.c
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+++ b/drivers/vfio/fsl-mc/vfio_fsl_mc.c
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@@ -32,10 +32,30 @@ static void vfio_fsl_mc_release(void *de
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static long vfio_fsl_mc_ioctl(void *device_data, unsigned int cmd,
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unsigned long arg)
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{
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+ unsigned long minsz;
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+ struct vfio_fsl_mc_device *vdev = device_data;
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+ struct fsl_mc_device *mc_dev = vdev->mc_dev;
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+
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switch (cmd) {
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case VFIO_DEVICE_GET_INFO:
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{
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- return -EINVAL;
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+ struct vfio_device_info info;
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+
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+ minsz = offsetofend(struct vfio_device_info, num_irqs);
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+
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+ if (copy_from_user(&info, (void __user *)arg, minsz))
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+ return -EFAULT;
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+
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+ if (info.argsz < minsz)
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+ return -EINVAL;
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+
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+ info.flags = VFIO_DEVICE_FLAGS_FSL_MC;
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+ info.num_regions = mc_dev->obj_desc.region_count;
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+ info.num_irqs = mc_dev->obj_desc.irq_count;
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+
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+ return copy_to_user((void __user *)arg, &info, minsz) ?
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+ -EFAULT : 0;
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+
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}
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case VFIO_DEVICE_GET_REGION_INFO:
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{
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