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Wed, 19 Aug 2026 03:50:33 -0700 (PDT) X-Received: by 2002:a17:90b:1f8f:b0:38d:f5bb:e0f4 with SMTP id 98e67ed59e1d1-39580840520mr7573006a91.1.1787136632948; Wed, 19 Aug 2026 03:50:32 -0700 (PDT) Received: from [10.218.4.105] ([202.46.22.19]) by smtp.gmail.com with ESMTPSA id 98e67ed59e1d1-3957fb7cc17sm2630469a91.9.2026.08.19.03.50.27 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Wed, 19 Aug 2026 03:50:32 -0700 (PDT) Subject: Re: [PATCH v7 2/2] mmc: sdhci-msm: Use pm ops instead of macro to restore crypto keys To: Eric Biggers , Ram Prakash Gupta Cc: ulf.hansson@linaro.org, adrian.hunter@intel.com, quic_dmukhopa@quicinc.com, quic_rampraka@quicinc.com, quic_nitirawa@quicinc.com, quic_sachgupt@quicinc.com, quic_bhaskarv@quicinc.com, quic_gaurkash@quicinc.com, quic_sartgarg@quicinc.com, linux-mmc@vger.kernel.org, linux-kernel@vger.kernel.org, linux-arm-msm@vger.kernel.org References: <20260811151759.1258525-1-neeraj.soni@oss.qualcomm.com> <20260811151759.1258525-3-neeraj.soni@oss.qualcomm.com> <20260811190851.GC2895176@google.com> <877c20e3-625c-4ba8-beed-305393b18cfe@oss.qualcomm.com> <20260818171227.GA2249@quark> From: Neeraj Soni Message-ID: <7ed514be-080d-ec2a-0803-9c884c69f4fc@oss.qualcomm.com> Date: Wed, 19 Aug 2026 16:20:26 +0530 User-Agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:78.0) Gecko/20100101 Thunderbird/78.14.0 Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 In-Reply-To: <20260818171227.GA2249@quark> Content-Type: text/plain; charset=utf-8 Content-Language: en-GB Content-Transfer-Encoding: 7bit X-Proofpoint-Spam-Info: AW1haW4tMjYwODE5MDA4MyBTYWx0ZWRfX2TPCQSn13igG 8aJNHNv0Fj4wuWDrELqgKiNb4F0yhvD0Rq6IAv1AMZmZuQsHMayUXl+66h/CIuo6T6n1QqV9646 p8fgDvfiB9279EhTp7TJsY4q/lRc2UY= X-Authority-Analysis: v=2.4 cv=H5PrBeYi c=1 sm=1 tr=0 ts=6a858a7a cx=c_pps a=RP+M6JBNLl+fLTcSJhASfg==:117 a=fChuTYTh2wq5r3m49p7fHw==:17 a=IkcTkHD0fZMA:10 a=Sv0fKeRqtYgA:10 a=s4-Qcg_JpJYA:10 a=VkNPw1HP01LnGYTKEx00:22 a=u7WPNUs3qKkmUXheDGA7:22 a=yx91gb_oNiZeI1HMLzn7:22 a=EUspDBNiAAAA:8 a=COk6AnOGAAAA:8 a=kxn0zb7G7q0rBOJBbKkA:9 a=QEXdDO2ut3YA:10 a=iS9zxrgQBfv6-_F4QbHw:22 a=TjNXssC_j7lpFel5tvFf:22 X-Proofpoint-ORIG-GUID: dYPlUUMZjDfaWKGUkrCL1RTTNLm-eZIj X-Proofpoint-Spam-Details-Enc: AW1haW4tMjYwODE5MDA4MyBTYWx0ZWRfX82bWVSrgKNac q6u5M4Dmr4OdJvVzQtg9h71D9//L0RPNjFYFJuYu+udCzZ92zSu35W9wLpnW1Yk3JqRndcNIljs ilTog/FAwq+lZ6ZCXNfWhMyXxizqSUhKNsdEOfSXioJC8audUVuIV81tUzCOp5Wj8n+MYMkppoS smbMiI4QFf2RAFWVxbQrNdPsk56llJaP79jei5rSLXbTLmtVPjkPXXo6gWVAYFSWPvz/mXxOI59 s++u7nSgx1OoE2f1NviUFu4GTT7Q08m8WKNBMW7BZkmf+KL87tyLMh1DFVd33qsfuuU5Be3m4CB RWZ95Kiy9KkQoTe4gvob8j5tJp2eTtIQtAr3n5HcRI4vPiUI5mC7T7+vzgSFII93fNr0m3D2DLW mBid5R9dSjLSkYKArLMYOmlEkF7rgSaslUbSR7HLsLQfOuY8dp7jmNfOLhP+ILpFBlVGgqcIbkc 4rFKsry1z+IrBRD6Iiw== X-Proofpoint-GUID: dYPlUUMZjDfaWKGUkrCL1RTTNLm-eZIj X-Proofpoint-Virus-Version: vendor=baseguard engine=ICAP:2.0.293,Aquarius:18.0.1176,Hydra:6.1.134,FMLib:17.12.100.49 definitions=2026-08-19_03,2026-08-18_01,2025-10-01_01 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 clxscore=1015 priorityscore=1501 bulkscore=0 impostorscore=0 adultscore=0 suspectscore=0 lowpriorityscore=0 phishscore=0 malwarescore=0 spamscore=0 classifier=typeunknown authscore=0 authtc= authcc= route=outbound adjust=0 reason=mlx scancount=1 engine=8.22.0-2606150000 definitions=main-2608190083 On 8/18/2026 10:42 PM, Eric Biggers wrote: > On Tue, Aug 18, 2026 at 01:00:21PM +0530, Ram Prakash Gupta wrote: >> >> >> On 8/12/2026 12:38 AM, Eric Biggers wrote: >>> On Tue, Aug 11, 2026 at 08:47:59PM +0530, Neeraj Soni wrote: >>>> From: Ram Prakash Gupta >>>> >>>> Inline Crypto Engine (ICE) keys are lost after hibernation entry and this >>>> needs to be restored when hibernation exits. ICE keys are re-programmed >>>> during sdhci_msm_ice_init() but it may not cover cases where the >>>> hibernation image is already restored. >>>> >>>> Unwrap the pm ops and use directly in driver to add the call to restore >>>> Inline Crypto Engine (ICE) keys. This ensures that ICE is brought into >>>> same state as before hibernation. >>>> >>>> Also set MMC_CAP2_CRYPTO_NO_REPROG to indicate that re-programming of ICE >>>> keys is not needed during MMC runtime suspend/resume. >>>> >>>> Signed-off-by: Ram Prakash Gupta >>>> Signed-off-by: Seshu Madhavi Puppala >>>> Co-developed-by: Ram Prakash Gupta >>>> Signed-off-by: Ram Prakash Gupta >>>> Co-developed-by: Sarthak Garg >>>> Signed-off-by: Sarthak Garg >>>> Signed-off-by: Debraj Mukhopadhyay >>>> Signed-off-by: Neeraj Soni >>>> --- >>>> drivers/mmc/host/sdhci-msm.c | 32 +++++++++++++++++++++++++++++++- >>>> 1 file changed, 31 insertions(+), 1 deletion(-) >>> >>> So with this patch, resume from hibernation will be the *only* time that >>> ICE keys are reprogrammed. Are you absolutely sure that is enough on >>> every SoC this driver supports? What about resume from suspend-to-RAM? >>> CQE error recovery? What if the hibernation image fails to be created? >>> >>> - Eric >> >> Hi Eric, >> >> There are two scenarios where key would be required to reprogram, first is when >> rail powering the ICE goes off or SDCC does BCR reset. >> >> now during suspend-to-RAM, rail powering the ice wont go off, so key would not >> be required to reprogram. During CQE recovery, key would be only lost when BCR >> reset is performed but that is not happening right now, to be taken up once its >> fixed as part of recovery flow. And in case hibernation image fails to create >> then device boots from normal flow where there is no need to reprogram the keys. >> > > Okay this patch should be okay then. Seems that the commit message > needs some work though to properly explain this. > Ack. Will update and post v8. > - Eric > Regards, Neeraj