From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mail-pa0-x233.google.com (mail-pa0-x233.google.com [IPv6:2607:f8b0:400e:c03::233]) (using TLSv1 with cipher ECDHE-RSA-RC4-SHA (128/128 bits)) (No client certificate requested) by ozlabs.org (Postfix) with ESMTPS id 39DD61401DF for ; Tue, 1 Apr 2014 14:59:59 +1100 (EST) Received: by mail-pa0-f51.google.com with SMTP id kq14so9252513pab.10 for ; Mon, 31 Mar 2014 20:59:55 -0700 (PDT) From: Joel Stanley To: benh@kernel.crashing.org, paulus@samba.org, anton@samba.org, shangw@linux.vnet.ibm.com, hegdevasant@linux.vnet.ibm.com, michael@ellerman.id.au, mikey@neuling.org, stewart@linux.vnet.ibm.com Subject: [PATCH v2 0/2] OPAL message log interface Date: Tue, 1 Apr 2014 14:28:18 +1030 Message-Id: <1396324700-22457-1-git-send-email-joel@jms.id.au> Cc: linuxppc-dev@lists.ozlabs.org List-Id: Linux on PowerPC Developers Mail List List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , 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