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Violators will be prosecuted; (version=TLSv1/SSLv3 cipher=AES256-GCM-SHA384 bits=256/256) Fri, 5 Apr 2019 10:17:14 +0100 Received: from d06av21.portsmouth.uk.ibm.com (d06av21.portsmouth.uk.ibm.com [9.149.105.232]) by b06cxnps4075.portsmouth.uk.ibm.com (8.14.9/8.14.9/NCO v10.0) with ESMTP id x359HDh959375746 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-GCM-SHA384 bits=256 verify=OK); Fri, 5 Apr 2019 09:17:13 GMT Received: from d06av21.portsmouth.uk.ibm.com (unknown [127.0.0.1]) by IMSVA (Postfix) with ESMTP id 98C6B5204E; Fri, 5 Apr 2019 09:17:13 +0000 (GMT) Received: from boston16h.aus.stglabs.ibm.com (unknown [9.3.23.78]) by d06av21.portsmouth.uk.ibm.com (Postfix) with ESMTP id 5A53D52050; Fri, 5 Apr 2019 09:17:12 +0000 (GMT) From: Abhishek Goel To: linux-kernel@vger.kernel.org, linuxppc-dev@lists.ozlabs.org, linux-pm@vger.kernel.org Subject: [PATCH v2 2/2] cpuidle : Add auto-promotion flag to cpuidle flags Date: Fri, 5 Apr 2019 04:16:47 -0500 X-Mailer: git-send-email 2.17.1 In-Reply-To: <20190405091647.4169-1-huntbag@linux.vnet.ibm.com> References: <20190405091647.4169-1-huntbag@linux.vnet.ibm.com> X-TM-AS-GCONF: 00 x-cbid: 19040509-0020-0000-0000-0000032C9111 X-IBM-AV-DETECTION: SAVI=unused REMOTE=unused XFE=unused x-cbparentid: 19040509-0021-0000-0000-0000217EA863 Message-Id: <20190405091647.4169-3-huntbag@linux.vnet.ibm.com> X-Proofpoint-Virus-Version: vendor=fsecure engine=2.50.10434:, , definitions=2019-04-05_06:, , signatures=0 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 priorityscore=1501 malwarescore=0 suspectscore=0 phishscore=0 bulkscore=0 spamscore=0 clxscore=1015 lowpriorityscore=0 mlxscore=0 impostorscore=0 mlxlogscore=791 adultscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.0.1-1810050000 definitions=main-1904050068 X-BeenThere: linuxppc-dev@lists.ozlabs.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: Linux on PowerPC Developers Mail List List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: Abhishek Goel , daniel.lezcano@linaro.org, rjw@rjwysocki.net, ego@linux.vnet.ibm.com Errors-To: linuxppc-dev-bounces+linuxppc-dev=archiver.kernel.org@lists.ozlabs.org Sender: "Linuxppc-dev" This patch sets up flags for the state which needs to be auto-promoted. On POWERNV system, only lite states need to be autopromoted. We identify lite states by those which do not lose user context. That information has been used to set the flag for lite states. Signed-off-by: Abhishek Goel --- arch/powerpc/include/asm/opal-api.h | 1 + drivers/cpuidle/Kconfig | 4 ++++ drivers/cpuidle/cpuidle-powernv.c | 13 +++++++++++-- 3 files changed, 16 insertions(+), 2 deletions(-) diff --git a/arch/powerpc/include/asm/opal-api.h b/arch/powerpc/include/asm/opal-api.h index 870fb7b23..735dec731 100644 --- a/arch/powerpc/include/asm/opal-api.h +++ b/arch/powerpc/include/asm/opal-api.h @@ -226,6 +226,7 @@ */ #define OPAL_PM_TIMEBASE_STOP 0x00000002 +#define OPAL_PM_LOSE_USER_CONTEXT 0x00001000 #define OPAL_PM_LOSE_HYP_CONTEXT 0x00002000 #define OPAL_PM_LOSE_FULL_CONTEXT 0x00004000 #define OPAL_PM_NAP_ENABLED 0x00010000 diff --git a/drivers/cpuidle/Kconfig b/drivers/cpuidle/Kconfig index 8caccbbd7..9b8e9b96a 100644 --- a/drivers/cpuidle/Kconfig +++ b/drivers/cpuidle/Kconfig @@ -35,6 +35,10 @@ config CPU_IDLE_GOV_TEO config DT_IDLE_STATES bool +config CPU_IDLE_AUTO_PROMOTION + bool + default y if PPC_POWERNV + menu "ARM CPU Idle Drivers" depends on ARM || ARM64 source "drivers/cpuidle/Kconfig.arm" diff --git a/drivers/cpuidle/cpuidle-powernv.c b/drivers/cpuidle/cpuidle-powernv.c index 84b1ebe21..0dd767270 100644 --- a/drivers/cpuidle/cpuidle-powernv.c +++ b/drivers/cpuidle/cpuidle-powernv.c @@ -299,6 +299,7 @@ static int powernv_add_idle_states(void) for (i = 0; i < dt_idle_states; i++) { unsigned int exit_latency, target_residency; bool stops_timebase = false; + bool lose_user_context = false; struct pnv_idle_states_t *state = &pnv_idle_states[i]; /* @@ -324,6 +325,9 @@ static int powernv_add_idle_states(void) if (has_stop_states && !(state->valid)) continue; + if (state->flags & OPAL_PM_LOSE_USER_CONTEXT) + lose_user_context = true; + if (state->flags & OPAL_PM_TIMEBASE_STOP) stops_timebase = true; @@ -332,12 +336,17 @@ static int powernv_add_idle_states(void) add_powernv_state(nr_idle_states, "Nap", CPUIDLE_FLAG_NONE, nap_loop, target_residency, exit_latency, 0, 0); + } else if (has_stop_states && !lose_user_context) { + add_powernv_state(nr_idle_states, state->name, + CPUIDLE_FLAG_AUTO_PROMOTION, + stop_loop, target_residency, + exit_latency, state->psscr_val, + state->psscr_mask); } else if (has_stop_states && !stops_timebase) { add_powernv_state(nr_idle_states, state->name, CPUIDLE_FLAG_NONE, stop_loop, target_residency, exit_latency, - state->psscr_val, - state->psscr_mask); + state->psscr_val, state->psscr_mask); } /* -- 2.17.1