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nvgpu: vgpu: no debugfs entries that rely on PMU

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When virtualized, the guest OS has no direct access to
PMU functionality so don't create debugfs entries that
rely on PMU access

Bug 200543218

Change-Id: I12730b600802448a240f3de042760041d3ae7d29
Signed-off-by: Peter Daifuku <pdaifuku@nvidia.com>
Reviewed-on: https://git-master.nvidia.com/r/2213650
(cherry picked from commit 053131ef44252748aecaad11ba8dc54f1dc40fce)
Reviewed-on: https://git-master.nvidia.com/r/2215162
Reviewed-by: Automatic_Commit_Validation_User
GVS: Gerrit_Virtual_Submit
Reviewed-by: Luis Dib <ldib@nvidia.com>
Reviewed-by: mobile promotions <svcmobile_promotions@nvidia.com>
Tested-by: mobile promotions <svcmobile_promotions@nvidia.com>
This commit is contained in:
Peter Daifuku
2019-10-08 14:03:49 -07:00
committed by mobile promotions
parent 56f8e5b878
commit bb1b3218c6
1 changed files with 22 additions and 19 deletions
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17
drivers/gpu/nvgpu/os/linux/debug_pmu.c
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@@ -1,5 +1,5 @@
/* /*
* Copyright (C) 2017 NVIDIA Corporation. All rights reserved. * Copyright (C) 2017-2019 NVIDIA Corporation. All rights reserved.
* *
* This software is licensed under the terms of the GNU General Public * This software is licensed under the terms of the GNU General Public
* License version 2, as published by the Free Software Foundation, and * License version 2, as published by the Free Software Foundation, and
@@ -451,6 +451,14 @@ int gk20a_pmu_debugfs_init(struct gk20a *g)
if (!d) if (!d)
goto err_out; goto err_out;
d = debugfs_create_file(
"pmu_security", S_IRUGO, l->debugfs, g,
&security_fops);
if (!d)
goto err_out;
/* No access to PMU if virtual */
if (!g->is_virtual) {
d = debugfs_create_file( d = debugfs_create_file(
"falc_trace", S_IRUGO, l->debugfs, g, "falc_trace", S_IRUGO, l->debugfs, g,
&falc_trace_fops); &falc_trace_fops);
@@ -468,12 +476,7 @@ int gk20a_pmu_debugfs_init(struct gk20a *g)
&perfmon_events_count_fops); &perfmon_events_count_fops);
if (!d) if (!d)
goto err_out; goto err_out;
}
d = debugfs_create_file(
"pmu_security", S_IRUGO, l->debugfs, g,
&security_fops);
if (!d)
goto err_out;
return 0; return 0;
err_out: err_out:
pr_err("%s: Failed to make debugfs node\n", __func__); pr_err("%s: Failed to make debugfs node\n", __func__);