From: Jason Gunthorpe <jgg@ziepe.ca>
To: Pranjal Shrivastava <praan@google.com>
Cc: Robin Murphy <robin.murphy@arm.com>,
Joerg Roedel <joro@8bytes.org>, Will Deacon <will@kernel.org>,
Nicolin Chen <nicolinc@nvidia.com>,
Mostafa Saleh <smostafa@google.com>,
Daniel Mentz <danielmentz@google.com>,
iommu@lists.linux.dev
Subject: Re: [RFC PATCH 0/5] iommu/arm-smmu-v3: Implement Runtime/System Sleep ops
Date: Fri, 21 Mar 2025 21:00:20 -0300 [thread overview]
Message-ID: <20250322000020.GR126678@ziepe.ca> (raw)
In-Reply-To: <Z915ebfGstqI0NIQ@google.com>
On Fri, Mar 21, 2025 at 02:36:41PM +0000, Pranjal Shrivastava wrote:
> > > What about IOMMUFD stuff like the Get HW info IOCTL?
> >
> > Isn't that all from SW caches?
> >
>
> Not really? I see arm_smmu_hw_info reads all the IDR registers..
> The call flow I could trace is like:
>
> iommufd_get_hw_info()
> -> iommu_ops->hw_info()
> -> arm_smmu_hw_info()
>
> Am I missing something here?
Oh, I see what you mean, even the IDR won't be readable. Yeah, that
should either be copied to memory during probe or we need to wake it
up to read the IDRs..
Jason
next prev parent reply other threads:[~2025-03-22 0:00 UTC|newest]
Thread overview: 71+ messages / expand[flat|nested] mbox.gz Atom feed top
2025-03-19 0:42 [RFC PATCH 0/5] iommu/arm-smmu-v3: Implement Runtime/System Sleep ops Pranjal Shrivastava
2025-03-19 0:42 ` [RFC PATCH 1/5] iommu/arm-smmu-v3: Refactor arm_smmu_setup_irqs Pranjal Shrivastava
2025-03-19 4:50 ` Nicolin Chen
2025-03-19 7:43 ` Pranjal Shrivastava
2025-03-20 22:29 ` Mostafa Saleh
2025-03-21 7:26 ` Pranjal Shrivastava
2025-03-25 16:19 ` Daniel Mentz
2025-03-26 19:35 ` Pranjal Shrivastava
2025-03-19 0:42 ` [RFC PATCH 2/5] iommu/arm-smmu-v3: Add a helper to wait till cmdq drains Pranjal Shrivastava
2025-03-20 22:30 ` Mostafa Saleh
2025-03-21 8:09 ` Pranjal Shrivastava
2025-03-25 17:50 ` Daniel Mentz
2025-03-26 19:36 ` Pranjal Shrivastava
2025-03-26 4:51 ` Daniel Mentz
2025-03-26 20:10 ` Pranjal Shrivastava
2025-03-19 0:42 ` [RFC PATCH 3/5] iommu/arm-smmu-v3: Implement pm_runtime & system sleep ops Pranjal Shrivastava
2025-03-20 22:33 ` Mostafa Saleh
2025-03-21 8:13 ` Pranjal Shrivastava
2025-03-26 4:52 ` Daniel Mentz
2025-03-28 7:47 ` Pranjal Shrivastava
2025-04-14 17:57 ` Nicolin Chen
2025-04-14 21:26 ` Nicolin Chen
2025-04-15 20:47 ` Pranjal Shrivastava
2025-04-15 22:28 ` Nicolin Chen
2025-04-16 10:24 ` Pranjal Shrivastava
2025-04-16 12:02 ` Jason Gunthorpe
2025-04-16 12:29 ` Pranjal Shrivastava
2025-04-16 12:42 ` Jason Gunthorpe
2025-04-16 12:52 ` Pranjal Shrivastava
2025-04-16 13:07 ` Jason Gunthorpe
2025-04-16 14:32 ` Pranjal Shrivastava
2025-04-15 20:37 ` Pranjal Shrivastava
2025-04-15 22:13 ` Nicolin Chen
2025-04-16 8:29 ` Pranjal Shrivastava
2025-03-19 0:42 ` [RFC PATCH 4/5] iommu/arm-smmu-v3: Enable pm_runtime and setup devlinks Pranjal Shrivastava
2025-03-20 22:34 ` Mostafa Saleh
2025-03-19 0:42 ` [RFC PATCH 5/5] iommu/arm-smmu-v3: Invoke pm_runtime before hw access Pranjal Shrivastava
2025-03-19 12:04 ` Jason Gunthorpe
2025-03-20 7:25 ` Pranjal Shrivastava
2025-03-20 12:54 ` Jason Gunthorpe
2025-03-20 13:22 ` Robin Murphy
2025-03-20 14:21 ` Pranjal Shrivastava
2025-03-20 22:36 ` Mostafa Saleh
2025-03-19 11:57 ` [RFC PATCH 0/5] iommu/arm-smmu-v3: Implement Runtime/System Sleep ops Jason Gunthorpe
2025-03-19 16:07 ` Robin Murphy
2025-03-20 22:25 ` Mostafa Saleh
2025-03-21 14:18 ` Pranjal Shrivastava
2025-03-21 17:35 ` Robin Murphy
2025-03-24 17:36 ` Pranjal Shrivastava
2025-03-27 17:27 ` Mostafa Saleh
2025-03-28 9:13 ` Pranjal Shrivastava
2025-03-28 9:19 ` Pranjal Shrivastava
2025-03-28 13:18 ` Jason Gunthorpe
2025-03-28 15:08 ` Pranjal Shrivastava
2025-03-28 18:21 ` Jason Gunthorpe
2025-03-19 18:22 ` Robin Murphy
2025-03-19 19:46 ` Jason Gunthorpe
2025-03-20 21:00 ` Pranjal Shrivastava
2025-03-20 23:08 ` Jason Gunthorpe
2025-03-21 14:36 ` Pranjal Shrivastava
2025-03-22 0:00 ` Jason Gunthorpe [this message]
2025-03-20 22:28 ` Mostafa Saleh
2025-03-20 23:05 ` Jason Gunthorpe
2025-03-21 14:44 ` Pranjal Shrivastava
2025-03-21 15:30 ` Jason Gunthorpe
2025-03-24 17:53 ` Pranjal Shrivastava
2025-03-25 13:55 ` Jason Gunthorpe
2025-03-27 17:39 ` Mostafa Saleh
2025-03-28 13:21 ` Jason Gunthorpe
2025-03-20 14:13 ` Pranjal Shrivastava
2025-03-20 14:54 ` Jason Gunthorpe
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