BMC/Intel-BMC/linux.git/arch/powerpc/perf/bhrb.S, branch devIntel OpenBMC Linux kernel source tree (mirror)https://git.radix-linux.su/BMC/Intel-BMC/linux.git/atom?h=dev2013-04-26T06:11:11+00:00powerpc/perf: Add basic assembly code to read BHRB entries on POWER82013-04-26T06:11:11+00:00Anshuman Khandualkhandual@linux.vnet.ibm.com2013-04-22T19:42:41+00:00urn:sha1:73760931dcbcbe29eab72e06577a77c64f16fd02
This patch adds the basic assembly code to read BHRB buffer. BHRB entries
are valid only after a PMU interrupt has happened (when MMCR0[PMAO]=1)
and BHRB has been freezed. BHRB read should not be attempted when it is
still enabled (MMCR0[PMAE]=1) and getting updated, as this can produce
non-deterministic results.
Signed-off-by: Anshuman Khandual <khandual@linux.vnet.ibm.com>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>