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SPDX makes it a simpler diff.
I have audited the commit history of each file to ensure that they are
exclusively authored by IBM and thus we have the right to relicense.
The motivation behind this is twofold:
1) We want to enable experiments with coreboot, which is GPLv2 licensed
2) An upcoming firmware component wants to incorporate code from skiboot
and code from the Linux kernel, which is GPLv2 licensed.
I have gone through the IBM internal way of gaining approval for this.
The following files are not exclusively authored by IBM, so are *not*
included in this update (I will be seeking approval from contributors):
core/direct-controls.c
core/flash.c
core/pcie-slot.c
external/common/arch_flash_unknown.c
external/common/rules.mk
external/gard/Makefile
external/gard/rules.mk
external/opal-prd/Makefile
external/pflash/Makefile
external/xscom-utils/Makefile
hdata/vpd.c
hw/dts.c
hw/ipmi/ipmi-watchdog.c
hw/phb4.c
include/cpu.h
include/phb4.h
include/platform.h
libflash/libffs.c
libstb/mbedtls/sha512.c
libstb/mbedtls/sha512.h
platforms/astbmc/barreleye.c
platforms/astbmc/garrison.c
platforms/astbmc/mihawk.c
platforms/astbmc/nicole.c
platforms/astbmc/p8dnu.c
platforms/astbmc/p8dtu.c
platforms/astbmc/p9dsu.c
platforms/astbmc/vesnin.c
platforms/rhesus/ec/config.h
platforms/rhesus/ec/gpio.h
platforms/rhesus/gpio.c
platforms/rhesus/rhesus.c
platforms/astbmc/talos.c
platforms/astbmc/romulus.c
Signed-off-by: Stewart Smith <stewart@linux.ibm.com>
[oliver: fixed up the drift]
Signed-off-by: Oliver O'Halloran <oohall@gmail.com>
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Use Software Package Data Exchange (SPDX) to indicate license for each
file that is unique to skiboot.
At the same time, ensure the (C) who and years are correct.
See https://spdx.org/
Signed-off-by: Stewart Smith <stewart@linux.ibm.com>
[oliver: Added a few missing files]
Signed-off-by: Oliver O'Halloran <oohall@gmail.com>
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Contrary to popular belief, skiboot developers are imperfect and
occasionally write locking bugs. When we exit skiboot, we check if we're
still holding any locks, and if so, we print an error with a list of the
locks currently held and the locations where they were taken.
However, this only tells us the location where lock() was called, which may
not be enough to work out what's going on. To give us more to go on with,
we can store backtrace data in the lock and print that out when we
unexpectedly still hold locks.
Because the backtrace data is rather big, we only enable this if
DEBUG_LOCKS_BACKTRACE is defined, which in turn is switched on when
DEBUG=1.
(We disable DEBUG_LOCKS_BACKTRACE in some of the memory allocation tests
because the locks used by the memory allocator take up too much room in the
fake skiboot heap.)
Signed-off-by: Andrew Donnellan <andrew.donnellan@au1.ibm.com>
Signed-off-by: Stewart Smith <stewart@linux.ibm.com>
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Keep track of lock owner name and replace lock_depth counter
with a per-cpu list of locks held by the cpu.
This allows us to print the actual locks held in case we hit
the (in)famous message about opal_pollers being run with a
lock held.
It also allows us to warn (and drop them) if locks are still
held when returning to the OS or completing a scheduled job.
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Reviewed-by: Nicholas Piggin <npiggin@gmail.com>
[stewart: fix unit tests]
Signed-off-by: Stewart Smith <stewart@linux.vnet.ibm.com>
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Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Signed-off-by: Stewart Smith <stewart@linux.vnet.ibm.com>
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cmpxchg will be used in a subsequent change, and this reduces the
amount of asm code.
Signed-off-by: Nicholas Piggin <npiggin@gmail.com>
[stewart: fix some ifdef __TEST__ foo to ensure unittests work]
Signed-off-by: Stewart Smith <stewart@linux.vnet.ibm.com>
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Avoids duplication of init values.
Signed-off-by: Michael Neuling <mikey@neuling.org>
Signed-off-by: Stewart Smith <stewart@linux.vnet.ibm.com>
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For debug purposes essentially
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
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Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
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