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>
