linux-stable/Documentation/powerpc
Reza Arbab 26b78c81e8 powerpc: Enable the DAWR on POWER9 DD2.3 and above
The hardware bug in POWER9 preventing use of the DAWR was fixed in
DD2.3. Set the CPU_FTR_DAWR feature bit on these newer systems to start
using it again, and update the documentation accordingly.

The CPU features for DD2.3 are currently determined by "DD2.2 or later"
logic. In adding DD2.3 as a discrete case for the first time here, I'm
carrying the quirks of DD2.2 forward to keep all behavior outside of
this DAWR change the same. This leaves the assessment and potential
removal of those quirks on DD2.3 for later.

Signed-off-by: Reza Arbab <arbab@linux.ibm.com>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Link: https://lore.kernel.org/r/20220503170152.23412-1-arbab@linux.ibm.com
2022-05-22 15:59:53 +10:00
..
associativity.rst
booting.rst
bootwrapper.rst
cpu_families.rst
cpu_features.rst
cxl.rst
cxlflash.rst
dawr-power9.rst powerpc: Enable the DAWR on POWER9 DD2.3 and above 2022-05-22 15:59:53 +10:00
dscr.rst
eeh-pci-error-recovery.rst
elfnote.rst
features.rst
firmware-assisted-dump.rst
hvcs.rst
imc.rst
index.rst
isa-versions.rst
kasan.txt
kaslr-booke32.rst
mpc52xx.rst
papr_hcalls.rst
pci_iov_resource_on_powernv.rst
pmu-ebb.rst
ptrace.rst
qe_firmware.rst
syscall64-abi.rst
transactional_memory.rst
ultravisor.rst
vas-api.rst
vcpudispatch_stats.rst