In absence of bl_debug_data parameter passed from Bootloader, value of
tegra_bl_debug_data_start will be 0.
This triggers a kernel panic on systems where parameter is not specified
and the module is loaded.
Fix this by first checking tegra_bl_debug_data_start and
tegra_bl_debug_data_size before accessing them.
Also add a check upfront to check if mandatory bootloader parameter
tegra_bl_prof_start is passed or not. If this parameter is not passed,
bail out the driver initialization.
Bug 3996651
Change-Id: Ibb78d6cefdae1f79ecb09836b833899deacb03ce
Signed-off-by: Deepak Nibade <dnibade@nvidia.com>
Reviewed-on: https://git-master.nvidia.com/r/c/linux-nv-oot/+/2900710
Reviewed-by: Bharat Nihalani <bnihalani@nvidia.com>
GVS: Gerrit_Virtual_Submit <buildbot_gerritrpt@nvidia.com>
Guest VM has access to all of the profiler carveout right now so that
it can read full carveout and dump all the entries.
Right now address and size of Guest VM owned profiler carveout is parsed
from kernel command line. And the address of full profiler carveout
(containing logs of other VMs too) is calculated based on assumptions.
Current architecture is now getting reworked so that only a privileged
Guest VM can access full carveout and that too in read-only mode. Each
VM will have read-write access to its own carveout to read/write
profiler entries of that VM.
Update tegra_bootloader_debug_init.c to parse tegra_bl_prof_ro_start and
tegra_bl_prof_ro_size from kernel command line. These values indicate
address and size of the full read only carveout.
In tegra_bootloader_debuginit(), map the address of read only carveout
to tegra_bl_mapped_prof_ro_start and set is_privileged_vm to true.
Only privileged VM will be assigned this read only address by BL.
tegra_bl_mapped_prof_start continues to map to read-write carveout
owned by the VM.
Update profiler_show() so that it reads entries from the read-only
carveout if is_privileged_vm is set, otherwise it reads from read
write carveout.
Bug 3566403
Change-Id: I3c1e5d42d67f7724c6fa43b7e27f08ce2cd607b7
Signed-off-by: Deepak Nibade <dnibade@nvidia.com>
Reviewed-on: https://git-master.nvidia.com/r/c/linux-nv-oot/+/2868921
Reviewed-by: Bharat Nihalani <bnihalani@nvidia.com>
GVS: Gerrit_Virtual_Submit <buildbot_gerritrpt@nvidia.com>
When kernel command line debugfs=off is specified instead of
disabling CONFIG_DEBUG_FS in defconfig to disable Debug-FS,
debugfs functions like debugfs_create_dir will fail.
Use function debugfs_initialized() to check if debugfs
functionality is enabled before calling any debugfs functions.
This allows us to by-pass debugfs initialization if debugfs
is not enabled.
Bug 3896536
Change-Id: I18182f2e5f8a6b466286980907b2019961ff7e39
Signed-off-by: Bharat Nihalani <bnihalani@nvidia.com>
Reviewed-on: https://git-master.nvidia.com/r/c/linux-nv-oot/+/2864651
Reviewed-by: svc-mobile-coverity <svc-mobile-coverity@nvidia.com>
Reviewed-by: svc-mobile-cert <svc-mobile-cert@nvidia.com>
GVS: Gerrit_Virtual_Submit <buildbot_gerritrpt@nvidia.com>
