From: Will Deacon <will@kernel.org>
To: "Mikołaj Lenczewski" <miko.lenczewski@arm.com>
Cc: ryan.roberts@arm.com, suzuki.poulose@arm.com,
yang@os.amperecomputing.com, corbet@lwn.net,
catalin.marinas@arm.com, jean-philippe@linaro.org,
robin.murphy@arm.com, joro@8bytes.org, akpm@linux-foundation.org,
paulmck@kernel.org, mark.rutland@arm.com, joey.gouly@arm.com,
maz@kernel.org, james.morse@arm.com, broonie@kernel.org,
oliver.upton@linux.dev, baohua@kernel.org, david@redhat.com,
ioworker0@gmail.com, jgg@ziepe.ca, nicolinc@nvidia.com,
mshavit@google.com, jsnitsel@redhat.com, smostafa@google.com,
kevin.tian@intel.com, linux-doc@vger.kernel.org,
linux-kernel@vger.kernel.org,
linux-arm-kernel@lists.infradead.org, iommu@lists.linux.dev
Subject: Re: [RESEND PATCH v6 2/3] iommu/arm: Add BBM Level 2 smmu feature
Date: Tue, 6 May 2025 15:19:49 +0100 [thread overview]
Message-ID: <20250506141949.GA1197@willie-the-truck> (raw)
In-Reply-To: <20250428153514.55772-6-miko.lenczewski@arm.com>
On Mon, Apr 28, 2025 at 03:35:16PM +0000, Mikołaj Lenczewski wrote:
> For supporting BBM Level 2 for userspace mappings, we want to ensure
> that the smmu also supports its own version of BBM Level 2. Luckily, the
> smmu spec (IHI 0070G 3.21.1.3) is stricter than the aarch64 spec (DDI
> 0487K.a D8.16.2), so already guarantees that no aborts are raised when
> BBM level 2 is claimed.
>
> Add the feature and testing for it under arm_smmu_sva_supported().
>
> Signed-off-by: Mikołaj Lenczewski <miko.lenczewski@arm.com>
> Reviewed-by: Robin Murphy <robin.murphy@arm.com>
> Reviewed-by: Ryan Roberts <ryan.roberts@arm.com>
> ---
> drivers/iommu/arm/arm-smmu-v3/arm-smmu-v3-sva.c | 3 +++
> drivers/iommu/arm/arm-smmu-v3/arm-smmu-v3.c | 3 +++
> drivers/iommu/arm/arm-smmu-v3/arm-smmu-v3.h | 4 ++++
> 3 files changed, 10 insertions(+)
This looks fine to me but please note that it doesn't apply against
mainline (v6.15-rc5).
Will
next prev parent reply other threads:[~2025-05-06 18:12 UTC|newest]
Thread overview: 28+ messages / expand[flat|nested] mbox.gz Atom feed top
2025-04-28 15:35 [RESEND PATCH v6 0/3] Initial BBML2 support for contpte_convert() Mikołaj Lenczewski
2025-04-28 15:35 ` [RESEND PATCH v6 1/3] arm64: Add BBM Level 2 cpu feature Mikołaj Lenczewski
2025-04-28 17:55 ` ALOK TIWARI
2025-05-06 8:36 ` Mikołaj Lenczewski
2025-05-06 14:25 ` Will Deacon
2025-05-06 14:51 ` Marc Zyngier
2025-05-06 14:57 ` Will Deacon
2025-05-06 14:52 ` Ryan Roberts
2025-05-09 13:49 ` Will Deacon
2025-05-09 14:16 ` Ryan Roberts
2025-05-09 14:28 ` Will Deacon
2025-05-09 14:58 ` Ryan Roberts
2025-05-09 15:59 ` Catalin Marinas
2025-05-09 16:04 ` Catalin Marinas
2025-05-12 13:07 ` Ryan Roberts
2025-05-12 13:24 ` Suzuki K Poulose
2025-05-12 13:35 ` Ryan Roberts
2025-05-12 16:33 ` Catalin Marinas
2025-05-13 9:15 ` Suzuki K Poulose
2025-05-14 12:05 ` Catalin Marinas
2025-05-19 9:45 ` Suzuki K Poulose
2025-05-22 15:23 ` Catalin Marinas
2025-05-22 16:29 ` Suzuki K Poulose
2025-05-12 17:17 ` Suzuki K Poulose
2025-04-28 15:35 ` [RESEND PATCH v6 2/3] iommu/arm: Add BBM Level 2 smmu feature Mikołaj Lenczewski
2025-05-06 14:19 ` Will Deacon [this message]
2025-04-28 15:35 ` [RESEND PATCH v6 3/3] arm64/mm: Elide tlbi in contpte_convert() under BBML2 Mikołaj Lenczewski
2025-04-28 16:17 ` Ryan Roberts
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