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gpu: nvgpu: remove sudo restrictions on gpu nodes.

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When SMC modes are enabled, devices are created with sudo-only
access permissions. Those permissions are relaxed to allow non-sudo
processes to allow job submission.

Also, allow only root users to poweroff explicitely via the device
power node.

Bug 3374078

Change-Id: Ieb869399c3ada3588708cf2bc99a580414023cb7
Signed-off-by: Debarshi Dutta <ddutta@nvidia.com>
Reviewed-on: https://git-master.nvidia.com/r/c/linux-nvgpu/+/2590584
Tested-by: mobile promotions <svcmobile_promotions@nvidia.com>
Reviewed-by: mobile promotions <svcmobile_promotions@nvidia.com>
This commit is contained in:
Debarshi Dutta
2021-09-07 18:18:39 +05:30
committed by mobile promotions
parent f3164a4672
commit 79ab0ba6c4
3 changed files with 6 additions and 17 deletions
Download Patch File Download Diff File Expand all files Collapse all files

16
drivers/gpu/nvgpu/os/linux/ioctl.c
View File

@@ -198,10 +198,6 @@ static char *nvgpu_devnode(const char *cdev_name)
static char *nvgpu_pci_devnode(struct device *dev, umode_t *mode)
{
if (mode) {
*mode = S_IRUSR | S_IWUSR;
}
/* Special case to maintain legacy names */
if (strcmp(dev_name(dev), "channel") == 0) {
return kasprintf(GFP_KERNEL, "nvgpu-pci/card-%s",
@@ -214,19 +210,11 @@ static char *nvgpu_pci_devnode(struct device *dev, umode_t *mode)
static char *nvgpu_devnode_v2(struct device *dev, umode_t *mode)
{
if (mode) {
*mode = S_IRUSR | S_IWUSR;
}
return kasprintf(GFP_KERNEL, "nvgpu/igpu0/%s", dev_name(dev));
}
static char *nvgpu_pci_devnode_v2(struct device *dev, umode_t *mode)
{
if (mode) {
*mode = S_IRUSR | S_IWUSR;
}
return kasprintf(GFP_KERNEL, "nvgpu/dgpu-%s/%s", dev_name(dev->parent),
dev_name(dev));
}
@@ -235,10 +223,6 @@ static char *nvgpu_mig_fgpu_devnode(struct device *dev, umode_t *mode)
{
struct nvgpu_cdev_class_priv_data *priv_data;
if (mode) {
*mode = S_IRUSR | S_IWUSR;
}
priv_data = dev_get_drvdata(dev);
if (priv_data->pci) {

5
drivers/gpu/nvgpu/os/linux/module.c
View File

@@ -1832,6 +1832,11 @@ int gk20a_driver_force_power_off(struct gk20a *g)
struct gk20a_platform *platform = gk20a_get_platform(dev);
int err = 0;
if (!capable(CAP_SYS_NICE)) {
nvgpu_err(g, "User doesn't have the permission for this operation");
return -EPERM;
}
#ifdef CONFIG_NVGPU_DGPU
if (g->pci_class) {
nvgpu_err(g, "Poweroff is not supported for device yet.");

2
drivers/gpu/nvgpu/os/linux/power_ops.c
View File

@@ -136,7 +136,7 @@ int gk20a_power_write(struct file *filp, const char __user *buf,
if (err) {
nvgpu_err(g, "power_node_write failed at busy");
kfree(userinput);
return -EINVAL;
return err;
}
} else {
nvgpu_err(g, "1/0 are the valid values to power-on the GPU");