These two patches add support for the message log, and expose a new OPAL call called opal_invalid that allow me to cause OPAL to inject messages into the log.
The naming is a bit mixed, as our device tree node is opal-memcons and I retained the naming of the header structure 'struct memcons', but all other references are to the OPAL message log. They have been tested on a POWER7+ machine running some recent firmware. Changes in V2: The guts of the function used to read the console has been reworked. In doing so, I've addressed the comments from Mikey and Ben: - Added barrier between reading header and data - Only read out_pos once - Check the return code before adding it to the number of bytes read Unlike V1, this version correctly reads out a wrapped buffer. Joel Stanley (2): powerpc/powernv: Add OPAL message log interface powerpc/powernv: Add invalid OPAL call arch/powerpc/include/asm/opal.h | 6 ++ arch/powerpc/platforms/powernv/Makefile | 1 + arch/powerpc/platforms/powernv/opal-msglog.c | 120 +++++++++++++++++++++++++ arch/powerpc/platforms/powernv/opal-wrappers.S | 1 + arch/powerpc/platforms/powernv/opal.c | 7 +- 5 files changed, 134 insertions(+), 1 deletion(-) create mode 100644 arch/powerpc/platforms/powernv/opal-msglog.c -- 1.9.1 _______________________________________________ Linuxppc-dev mailing list Linuxppc-dev@lists.ozlabs.org https://lists.ozlabs.org/listinfo/linuxppc-dev
