get:
Show a patch.

patch:
Update a patch.

put:
Update a patch.

GET /api/patches/807432/?format=api
HTTP 200 OK
Allow: GET, PUT, PATCH, HEAD, OPTIONS
Content-Type: application/json
Vary: Accept

{
    "id": 807432,
    "url": "http://patchwork.ozlabs.org/api/patches/807432/?format=api",
    "web_url": "http://patchwork.ozlabs.org/project/skiboot/patch/20170830062011.15199-3-npiggin@gmail.com/",
    "project": {
        "id": 44,
        "url": "http://patchwork.ozlabs.org/api/projects/44/?format=api",
        "name": "skiboot firmware development",
        "link_name": "skiboot",
        "list_id": "skiboot.lists.ozlabs.org",
        "list_email": "skiboot@lists.ozlabs.org",
        "web_url": "http://github.com/open-power/skiboot",
        "scm_url": "http://github.com/open-power/skiboot",
        "webscm_url": "",
        "list_archive_url": "",
        "list_archive_url_format": "",
        "commit_url_format": ""
    },
    "msgid": "<20170830062011.15199-3-npiggin@gmail.com>",
    "list_archive_url": null,
    "date": "2017-08-30T06:20:10",
    "name": "[2/3] idle: disable stop*_lite POWER9 idle states for Mambo platform",
    "commit_ref": null,
    "pull_url": null,
    "state": "accepted",
    "archived": false,
    "hash": "06280d9fc575fcffd657343f0bc6573e17cc9e38",
    "submitter": {
        "id": 69518,
        "url": "http://patchwork.ozlabs.org/api/people/69518/?format=api",
        "name": "Nicholas Piggin",
        "email": "npiggin@gmail.com"
    },
    "delegate": null,
    "mbox": "http://patchwork.ozlabs.org/project/skiboot/patch/20170830062011.15199-3-npiggin@gmail.com/mbox/",
    "series": [
        {
            "id": 532,
            "url": "http://patchwork.ozlabs.org/api/series/532/?format=api",
            "web_url": "http://patchwork.ozlabs.org/project/skiboot/list/?series=532",
            "date": "2017-08-30T06:20:08",
            "name": "misc idle fixes",
            "version": 1,
            "mbox": "http://patchwork.ozlabs.org/series/532/mbox/"
        }
    ],
    "comments": "http://patchwork.ozlabs.org/api/patches/807432/comments/",
    "check": "pending",
    "checks": "http://patchwork.ozlabs.org/api/patches/807432/checks/",
    "tags": {},
    "related": [],
    "headers": {
        "Return-Path": "<skiboot-bounces+incoming=patchwork.ozlabs.org@lists.ozlabs.org>",
        "X-Original-To": [
            "incoming@patchwork.ozlabs.org",
            "skiboot@lists.ozlabs.org"
        ],
        "Delivered-To": [
            "patchwork-incoming@bilbo.ozlabs.org",
            "skiboot@lists.ozlabs.org"
        ],
        "Received": [
            "from lists.ozlabs.org (lists.ozlabs.org [IPv6:2401:3900:2:1::3])\n\t(using TLSv1.2 with cipher ADH-AES256-GCM-SHA384 (256/256 bits))\n\t(No client certificate requested)\n\tby ozlabs.org (Postfix) with ESMTPS id 3xhwPY3CBgz9sNc\n\tfor <incoming@patchwork.ozlabs.org>;\n\tWed, 30 Aug 2017 16:21:21 +1000 (AEST)",
            "from lists.ozlabs.org (lists.ozlabs.org [IPv6:2401:3900:2:1::3])\n\tby lists.ozlabs.org (Postfix) with ESMTP id 3xhwPY20QszDqJ8\n\tfor <incoming@patchwork.ozlabs.org>;\n\tWed, 30 Aug 2017 16:21:21 +1000 (AEST)",
            "from mail-pf0-x242.google.com (mail-pf0-x242.google.com\n\t[IPv6:2607:f8b0:400e:c00::242])\n\t(using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128\n\tbits)) (No client certificate requested)\n\tby lists.ozlabs.org (Postfix) with ESMTPS id 3xhwNw60bCzDqHx\n\tfor <skiboot@lists.ozlabs.org>; Wed, 30 Aug 2017 16:20:48 +1000 (AEST)",
            "by mail-pf0-x242.google.com with SMTP id k3so3750782pfc.3\n\tfor <skiboot@lists.ozlabs.org>; Tue, 29 Aug 2017 23:20:48 -0700 (PDT)",
            "from roar.au.ibm.com (203-219-56-202.tpgi.com.au. [203.219.56.202])\n\tby smtp.gmail.com with ESMTPSA id\n\t82sm8266783pgb.86.2017.08.29.23.20.43\n\t(version=TLS1_2 cipher=ECDHE-RSA-AES128-GCM-SHA256 bits=128/128);\n\tTue, 29 Aug 2017 23:20:45 -0700 (PDT)"
        ],
        "Authentication-Results": [
            "ozlabs.org;\n\tdkim=fail reason=\"signature verification failed\" (2048-bit key;\n\tunprotected) header.d=gmail.com header.i=@gmail.com\n\theader.b=\"PdUey74v\"; dkim-atps=neutral",
            "lists.ozlabs.org;\n\tdkim=fail reason=\"signature verification failed\" (2048-bit key;\n\tunprotected) header.d=gmail.com header.i=@gmail.com\n\theader.b=\"PdUey74v\"; dkim-atps=neutral",
            "lists.ozlabs.org; dkim=pass (2048-bit key;\n\tunprotected) header.d=gmail.com header.i=@gmail.com\n\theader.b=\"PdUey74v\"; dkim-atps=neutral"
        ],
        "DKIM-Signature": "v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20161025;\n\th=from:to:cc:subject:date:message-id:in-reply-to:references;\n\tbh=G1paMLGJDkHa1SY5TfirBB2LXp2Fo/el4ovseAdubq0=;\n\tb=PdUey74vjyufQSXiUVXcklSB/xoZMs7XxHwnsrIpvvucYrYoOrq/AAdor376CDor9e\n\tZG01q3CHNP2wgBF/lXVo1Xu01utHnQKOcRU11S2lBoICkaOR4rKKfUjvBzWpXZH9/gNN\n\tb2gqo0Efl/plP/3Uyq/GEQT3p/j4CiNB/4YapXvZUWoq5v/WdhdxfrfYvV6CLgW5b25f\n\t8q46T029woBx9bzLD/qmn4L/aBCnif+K5Tzr3ZYCHmajFd8A5F48G8LkcdrZMIOxAOiz\n\tTXPXqwknNNcxpiIqP9Gnrr5YaDQ8/gy5w8FE0vBD8K/xFFS+xZQwbAjGFJcxH1h2MUBw\n\taKWg==",
        "X-Google-DKIM-Signature": "v=1; a=rsa-sha256; c=relaxed/relaxed;\n\td=1e100.net; s=20161025;\n\th=x-gm-message-state:from:to:cc:subject:date:message-id:in-reply-to\n\t:references;\n\tbh=G1paMLGJDkHa1SY5TfirBB2LXp2Fo/el4ovseAdubq0=;\n\tb=MO5FdBDum0kxV0btvYJoOY2+hwwcqZM+UyIxH8dbdaTjXjojnonnigKAmzNdT2u52h\n\t/NwQy1YH4IvB09fZ00HBt8WRC7mDsBTmiO2XHfiyZsa9LyV+sCP9OM2ZdV/cvMY5jouX\n\ta9dYoUx35sEhqO/Sue+PJ2X+M7ByZywS4nPGxqmGnNqCAUpQ5KDV2GSSEAh9S4LoWfos\n\tEUN4n5oLJzjIsSG6PHuBeecmEJOY/3MK0Y57CZY6cqz9boc8jB+JkXBQ5npFOY8lFvbb\n\thfbJvvwS9AHTz0ovQ6xhEj8TaBI0Ik18jHnqpFIZ2FdZ8aGpU1jyc9jsN8ryuDioVo93\n\te78A==",
        "X-Gm-Message-State": "AHYfb5jkFNUFNqL4JYdrlTvpxQiwv6Thnbmwp/Txfn5NqAE1jHeUl1O5\n\t74ww+NOWaUP0Nc8p",
        "X-Received": "by 10.99.140.14 with SMTP id m14mr567848pgd.106.1504074046600;\n\tTue, 29 Aug 2017 23:20:46 -0700 (PDT)",
        "From": "Nicholas Piggin <npiggin@gmail.com>",
        "To": "skiboot@lists.ozlabs.org",
        "Date": "Wed, 30 Aug 2017 16:20:10 +1000",
        "Message-Id": "<20170830062011.15199-3-npiggin@gmail.com>",
        "X-Mailer": "git-send-email 2.13.3",
        "In-Reply-To": "<20170830062011.15199-1-npiggin@gmail.com>",
        "References": "<20170830062011.15199-1-npiggin@gmail.com>",
        "Subject": "[Skiboot] [PATCH 2/3] idle: disable stop*_lite POWER9 idle states\n\tfor Mambo platform",
        "X-BeenThere": "skiboot@lists.ozlabs.org",
        "X-Mailman-Version": "2.1.23",
        "Precedence": "list",
        "List-Id": "Mailing list for skiboot development <skiboot.lists.ozlabs.org>",
        "List-Unsubscribe": "<https://lists.ozlabs.org/options/skiboot>,\n\t<mailto:skiboot-request@lists.ozlabs.org?subject=unsubscribe>",
        "List-Archive": "<http://lists.ozlabs.org/pipermail/skiboot/>",
        "List-Post": "<mailto:skiboot@lists.ozlabs.org>",
        "List-Help": "<mailto:skiboot-request@lists.ozlabs.org?subject=help>",
        "List-Subscribe": "<https://lists.ozlabs.org/listinfo/skiboot>,\n\t<mailto:skiboot-request@lists.ozlabs.org?subject=subscribe>",
        "Cc": "\"Gautham R . Shenoy\" <ego@linux.vnet.ibm.com>",
        "MIME-Version": "1.0",
        "Content-Type": "text/plain; charset=\"utf-8\"",
        "Content-Transfer-Encoding": "base64",
        "Errors-To": "skiboot-bounces+incoming=patchwork.ozlabs.org@lists.ozlabs.org",
        "Sender": "\"Skiboot\"\n\t<skiboot-bounces+incoming=patchwork.ozlabs.org@lists.ozlabs.org>"
    },
    "content": "Mambo prior to Mambo.7.8.21 had a bug where the stop idle instruction\nwith PSSCR[ESL]=PSSCR[EC]=0 would resume with MSR set as though it had\ntaken a system reset interrupt.\n\nLinux currently executes this instruction with MSR already set that\nway, so the problem went unnoticed. A proposed patch to Linux changes\nthat, and causes the idle code to crash. Work around this by disabling\nlite stop states for the mambo platform for now.\n\nSigned-off-by: Nicholas Piggin <npiggin@gmail.com>\n---\n hw/slw.c | 111 ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++-\n 1 file changed, 110 insertions(+), 1 deletion(-)",
    "diff": "diff --git a/hw/slw.c b/hw/slw.c\nindex 0720545c..d8829a6b 100644\n--- a/hw/slw.c\n+++ b/hw/slw.c\n@@ -649,6 +649,112 @@ static struct cpu_idle_states power9_cpu_idle_states[] = {\n \n };\n \n+/*\n+ * Prior to Mambo.7.8.21, mambo did set the MSR correctly for lite stop\n+ * states, so disable them for now.\n+ */\n+static struct cpu_idle_states power9_mambo_cpu_idle_states[] = {\n+\t{\n+\t\t.name = \"stop0\",\n+\t\t.latency_ns = 2000,\n+\t\t.residency_ns = 20000,\n+\t\t.flags = 0*OPAL_PM_DEC_STOP \\\n+\t\t       | 0*OPAL_PM_TIMEBASE_STOP  \\\n+\t\t       | 1*OPAL_PM_LOSE_USER_CONTEXT \\\n+\t\t       | 0*OPAL_PM_LOSE_HYP_CONTEXT \\\n+\t\t       | 0*OPAL_PM_LOSE_FULL_CONTEXT \\\n+\t\t       | 1*OPAL_PM_STOP_INST_FAST,\n+\t\t.pm_ctrl_reg_val = OPAL_PM_PSSCR_RL(0) \\\n+\t\t\t\t | OPAL_PM_PSSCR_MTL(3) \\\n+\t\t\t\t | OPAL_PM_PSSCR_TR(3) \\\n+\t\t\t\t | OPAL_PM_PSSCR_ESL \\\n+\t\t\t\t | OPAL_PM_PSSCR_EC,\n+\t\t.pm_ctrl_reg_mask = OPAL_PM_PSSCR_MASK },\n+\t{\n+\t\t.name = \"stop1\",\n+\t\t.latency_ns = 5000,\n+\t\t.residency_ns = 50000,\n+\t\t.flags = 0*OPAL_PM_DEC_STOP \\\n+\t\t       | 0*OPAL_PM_TIMEBASE_STOP  \\\n+\t\t       | 1*OPAL_PM_LOSE_USER_CONTEXT \\\n+\t\t       | 0*OPAL_PM_LOSE_HYP_CONTEXT \\\n+\t\t       | 0*OPAL_PM_LOSE_FULL_CONTEXT \\\n+\t\t       | 1*OPAL_PM_STOP_INST_FAST,\n+\t\t.pm_ctrl_reg_val = OPAL_PM_PSSCR_RL(1) \\\n+\t\t\t\t | OPAL_PM_PSSCR_MTL(3) \\\n+\t\t\t\t | OPAL_PM_PSSCR_TR(3) \\\n+\t\t\t\t | OPAL_PM_PSSCR_ESL \\\n+\t\t\t\t | OPAL_PM_PSSCR_EC,\n+\t\t.pm_ctrl_reg_mask = OPAL_PM_PSSCR_MASK },\n+\t{\n+\t\t.name = \"stop2\",\n+\t\t.latency_ns = 10000,\n+\t\t.residency_ns = 100000,\n+\t\t.flags = 0*OPAL_PM_DEC_STOP \\\n+\t\t       | 0*OPAL_PM_TIMEBASE_STOP  \\\n+\t\t       | 1*OPAL_PM_LOSE_USER_CONTEXT \\\n+\t\t       | 0*OPAL_PM_LOSE_HYP_CONTEXT \\\n+\t\t       | 0*OPAL_PM_LOSE_FULL_CONTEXT \\\n+\t\t       | 1*OPAL_PM_STOP_INST_FAST,\n+\t\t.pm_ctrl_reg_val = OPAL_PM_PSSCR_RL(2) \\\n+\t\t\t\t | OPAL_PM_PSSCR_MTL(3) \\\n+\t\t\t\t | OPAL_PM_PSSCR_TR(3) \\\n+\t\t\t\t | OPAL_PM_PSSCR_ESL \\\n+\t\t\t\t | OPAL_PM_PSSCR_EC,\n+\t\t.pm_ctrl_reg_mask = OPAL_PM_PSSCR_MASK },\n+\t{\n+\t\t.name = \"stop4\",\n+\t\t.latency_ns = 100000,\n+\t\t.residency_ns = 1000000,\n+\t\t.flags = 1*OPAL_PM_DEC_STOP \\\n+\t\t       | 1*OPAL_PM_TIMEBASE_STOP  \\\n+\t\t       | 1*OPAL_PM_LOSE_USER_CONTEXT \\\n+\t\t       | 1*OPAL_PM_LOSE_HYP_CONTEXT \\\n+\t\t       | 1*OPAL_PM_LOSE_FULL_CONTEXT \\\n+\t\t       | 1*OPAL_PM_STOP_INST_DEEP,\n+\t\t.pm_ctrl_reg_val = OPAL_PM_PSSCR_RL(4) \\\n+\t\t\t\t | OPAL_PM_PSSCR_MTL(7) \\\n+\t\t\t\t | OPAL_PM_PSSCR_TR(3) \\\n+\t\t\t\t | OPAL_PM_PSSCR_ESL \\\n+\t\t\t\t | OPAL_PM_PSSCR_EC,\n+\t\t.pm_ctrl_reg_mask = OPAL_PM_PSSCR_MASK },\n+\n+\t{\n+\t\t.name = \"stop8\",\n+\t\t.latency_ns = 2000000,\n+\t\t.residency_ns = 20000000,\n+\t\t.flags = 1*OPAL_PM_DEC_STOP \\\n+\t\t       | 1*OPAL_PM_TIMEBASE_STOP  \\\n+\t\t       | 1*OPAL_PM_LOSE_USER_CONTEXT \\\n+\t\t       | 1*OPAL_PM_LOSE_HYP_CONTEXT \\\n+\t\t       | 1*OPAL_PM_LOSE_FULL_CONTEXT \\\n+\t\t       | 1*OPAL_PM_STOP_INST_DEEP,\n+\t\t.pm_ctrl_reg_val = OPAL_PM_PSSCR_RL(8) \\\n+\t\t\t\t | OPAL_PM_PSSCR_MTL(11) \\\n+\t\t\t\t | OPAL_PM_PSSCR_TR(3) \\\n+\t\t\t\t | OPAL_PM_PSSCR_ESL \\\n+\t\t\t\t | OPAL_PM_PSSCR_EC,\n+\t\t.pm_ctrl_reg_mask = OPAL_PM_PSSCR_MASK },\n+\n+\t{\n+\t\t.name = \"stop11\",\n+\t\t.latency_ns = 10000000,\n+\t\t.residency_ns = 100000000,\n+\t\t.flags = 1*OPAL_PM_DEC_STOP \\\n+\t\t       | 1*OPAL_PM_TIMEBASE_STOP  \\\n+\t\t       | 1*OPAL_PM_LOSE_USER_CONTEXT \\\n+\t\t       | 1*OPAL_PM_LOSE_HYP_CONTEXT \\\n+\t\t       | 1*OPAL_PM_LOSE_FULL_CONTEXT \\\n+\t\t       | 1*OPAL_PM_STOP_INST_DEEP,\n+\t\t.pm_ctrl_reg_val = OPAL_PM_PSSCR_RL(11) \\\n+\t\t\t\t | OPAL_PM_PSSCR_MTL(11) \\\n+\t\t\t\t | OPAL_PM_PSSCR_TR(3) \\\n+\t\t\t\t | OPAL_PM_PSSCR_ESL \\\n+\t\t\t\t | OPAL_PM_PSSCR_EC,\n+\t\t.pm_ctrl_reg_mask = OPAL_PM_PSSCR_MASK },\n+\n+};\n+\n /* Idle states supported for P9 DD1 */\n static struct cpu_idle_states power9_ndd1_cpu_idle_states[] = {\n \t{\n@@ -750,7 +856,10 @@ void add_cpu_idle_state_properties(void)\n \tassert(chip);\n \tif (chip->type == PROC_CHIP_P9_NIMBUS ||\n \t    chip->type == PROC_CHIP_P9_CUMULUS) {\n-\t\tif ((chip->ec_level == 0x10) &&\n+\t\tif (proc_chip_quirks & QUIRK_MAMBO_CALLOUTS) {\n+\t\t\tstates = power9_mambo_cpu_idle_states;\n+\t\t\tnr_states = ARRAY_SIZE(power9_mambo_cpu_idle_states);\n+\t\t} else if ((chip->ec_level == 0x10) &&\n \t\t    (chip->type == PROC_CHIP_P9_NIMBUS)) {\n \t\t\tstates = power9_ndd1_cpu_idle_states;\n \t\t\tnr_states = ARRAY_SIZE(power9_ndd1_cpu_idle_states);\n",
    "prefixes": [
        "2/3"
    ]
}