lists.openwall.net | lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening PHC | |
Open Source and information security mailing list archives
| ||
|
Date: Tue, 10 Aug 2021 21:25:55 +0100 From: Will Deacon <will@...nel.org> To: Sai Prakash Ranjan <saiprakash.ranjan@...eaurora.org>, Joerg Roedel <joro@...tes.org>, Robin Murphy <robin.murphy@....com> Cc: catalin.marinas@....com, kernel-team@...roid.com, Will Deacon <will@...nel.org>, linux-arm-kernel@...ts.infradead.org, Rajendra Nayak <rnayak@...eaurora.org>, Rob Clark <robdclark@...il.com>, Taniya Das <tdas@...eaurora.org>, linux-arm-msm@...r.kernel.org, iommu@...ts.linux-foundation.org, linux-kernel@...r.kernel.org Subject: Re: [PATCHv2] iommu/arm-smmu: Add clk_bulk_{prepare/unprepare} to system pm callbacks On Tue, 10 Aug 2021 12:18:08 +0530, Sai Prakash Ranjan wrote: > Some clocks for SMMU can have parent as XO such as gpu_cc_hub_cx_int_clk > of GPU SMMU in QTI SC7280 SoC and in order to enter deep sleep states in > such cases, we would need to drop the XO clock vote in unprepare call and > this unprepare callback for XO is in RPMh (Resource Power Manager-Hardened) > clock driver which controls RPMh managed clock resources for new QTI SoCs. > > Given we cannot have a sleeping calls such as clk_bulk_prepare() and > clk_bulk_unprepare() in arm-smmu runtime pm callbacks since the iommu > operations like map and unmap can be in atomic context and are in fast > path, add this prepare and unprepare call to drop the XO vote only for > system pm callbacks since it is not a fast path and we expect the system > to enter deep sleep states with system pm as opposed to runtime pm. > > [...] Applied to will (for-joerg/arm-smmu/updates), thanks! [1/1] iommu/arm-smmu: Add clk_bulk_{prepare/unprepare} to system pm callbacks https://git.kernel.org/will/c/afefe67e0893 Cheers, -- Will https://fixes.arm64.dev https://next.arm64.dev https://will.arm64.dev
Powered by blists - more mailing lists