From: Jason Gunthorpe <jgg@ziepe.ca>
To: Yang Shi <yang@os.amperecomputing.com>
Cc: Nicolin Chen <nicolinc@nvidia.com>,
james.morse@arm.com, will@kernel.org, robin.murphy@arm.com,
linux-arm-kernel@lists.infradead.org,
linux-kernel@vger.kernel.org
Subject: Re: [v2 PATCH] iommu/arm-smmu-v3: Fix L1 stream table index calculation for 32-bit sid size
Date: Fri, 4 Oct 2024 09:43:43 -0300 [thread overview]
Message-ID: <20241004124343.GE2456194@ziepe.ca> (raw)
In-Reply-To: <43c2227a-71c9-4cbf-bfec-5a2fbf698f27@os.amperecomputing.com>
On Thu, Oct 03, 2024 at 08:31:23AM -0700, Yang Shi wrote:
> If I understand correctly, the check is mainly used to avoid the u64 -> u32
> overflow. This check guarantee no overflow. If some crazy hardware really
> requests that large memory, the allocation will fail.
Sure, the kalloc will print a warn on anyhow if it is too big
Jason
next prev parent reply other threads:[~2024-10-04 12:45 UTC|newest]
Thread overview: 20+ messages / expand[flat|nested] mbox.gz Atom feed top
2024-10-02 17:55 [v2 PATCH] iommu/arm-smmu-v3: Fix L1 stream table index calculation for 32-bit sid size Yang Shi
2024-10-02 18:14 ` Jason Gunthorpe
2024-10-02 18:17 ` Nicolin Chen
2024-10-02 19:04 ` Yang Shi
2024-10-02 19:22 ` Nicolin Chen
2024-10-02 19:40 ` Jason Gunthorpe
2024-10-02 20:00 ` Yang Shi
2024-10-02 20:05 ` Yang Shi
2024-10-03 11:16 ` Jason Gunthorpe
2024-10-03 15:31 ` Yang Shi
2024-10-04 12:43 ` Jason Gunthorpe [this message]
2024-10-04 16:05 ` Yang Shi
2024-10-04 16:14 ` Jason Gunthorpe
2024-10-04 16:29 ` Yang Shi
2024-10-04 16:37 ` Yang Shi
2024-10-04 16:41 ` Jason Gunthorpe
2024-10-04 16:46 ` Yang Shi
2024-10-02 19:50 ` Yang Shi
2024-10-02 18:21 ` Robin Murphy
2024-10-02 18:36 ` Yang Shi
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