From: Catalin Marinas <catalin.marinas@arm.com>
To: Dan Williams <dan.j.williams@intel.com>
Cc: Steven Price <steven.price@arm.com>,
kvm@vger.kernel.org, kvmarm@lists.linux.dev,
Sami Mujawar <sami.mujawar@arm.com>,
Marc Zyngier <maz@kernel.org>, Will Deacon <will@kernel.org>,
James Morse <james.morse@arm.com>,
Oliver Upton <oliver.upton@linux.dev>,
Suzuki K Poulose <suzuki.poulose@arm.com>,
Zenghui Yu <yuzenghui@huawei.com>,
linux-arm-kernel@lists.infradead.org,
linux-kernel@vger.kernel.org, Joey Gouly <joey.gouly@arm.com>,
Alexandru Elisei <alexandru.elisei@arm.com>,
Christoffer Dall <christoffer.dall@arm.com>,
Fuad Tabba <tabba@google.com>,
linux-coco@lists.linux.dev,
Ganapatrao Kulkarni <gankulkarni@os.amperecomputing.com>,
Gavin Shan <gshan@redhat.com>,
Shanker Donthineni <sdonthineni@nvidia.com>,
Alper Gun <alpergun@google.com>,
"Aneesh Kumar K . V" <aneesh.kumar@kernel.org>
Subject: Re: [PATCH v7 10/11] virt: arm-cca-guest: TSM_REPORT support for realms
Date: Thu, 5 Dec 2024 11:51:23 +0000 [thread overview]
Message-ID: <Z1GTu1kAV3J1cnJc@arm.com> (raw)
In-Reply-To: <6750c695194cd_2508129427@dwillia2-xfh.jf.intel.com.notmuch>
On Wed, Dec 04, 2024 at 01:16:05PM -0800, Dan Williams wrote:
> Steven Price wrote:
> > diff --git a/drivers/virt/coco/arm-cca-guest/Kconfig b/drivers/virt/coco/arm-cca-guest/Kconfig
> > new file mode 100644
> > index 000000000000..9dd27c3ee215
> > --- /dev/null
> > +++ b/drivers/virt/coco/arm-cca-guest/Kconfig
> > @@ -0,0 +1,11 @@
> > +config ARM_CCA_GUEST
> > + tristate "Arm CCA Guest driver"
> > + depends on ARM64
> > + default m
>
> I am working on some updates to the TSM_REPORTS interface, rebased them
> to test the changes with this driver, and discovered that this driver is
> enabled by default.
>
> Just a reminder to please do not mark new drivers as "default m" [1]. In
> this case it is difficult to imagine that every arm64 kernel on the
> planet needs this functionality enabled by default. In general, someone
> should be able to run olddefconfig with a new kernel and not be exposed
> to brand new drivers that they have not considered previously.
>
> [1]: http://lore.kernel.org/CA+55aFzxL6-Xp=-mnBwMisZsuKhRZ6zRDJoAmH8W5LDHU2oJuw@mail.gmail.com/
Fair point, the pKVM driver is also default off. At least with the arm64
defconfig, VIRT_DRIVERS is default off, so this wouldn't be built. But
an olddefconfig will indeed enable it (this reminds me to add the coco
drivers to my test configs).
--
Catalin
next prev parent reply other threads:[~2024-12-05 11:51 UTC|newest]
Thread overview: 25+ messages / expand[flat|nested] mbox.gz Atom feed top
2024-10-17 13:14 [PATCH v7 00/11] arm64: Support for running as a guest in Arm CCA Steven Price
2024-10-17 13:14 ` [PATCH v7 01/11] arm64: rsi: Add RSI definitions Steven Price
2024-10-17 13:14 ` [PATCH v7 02/11] arm64: Detect if in a realm and set RIPAS RAM Steven Price
2024-10-17 13:14 ` [PATCH v7 03/11] arm64: realm: Query IPA size from the RMM Steven Price
2024-10-17 13:14 ` [PATCH v7 04/11] arm64: rsi: Add support for checking whether an MMIO is protected Steven Price
2024-10-17 13:14 ` [PATCH v7 05/11] arm64: rsi: Map unprotected MMIO as decrypted Steven Price
2024-10-17 13:14 ` [PATCH v7 06/11] efi: arm64: Map Device with Prot Shared Steven Price
2024-10-17 13:14 ` [PATCH v7 07/11] arm64: Enforce bounce buffers for realm DMA Steven Price
2024-10-17 13:14 ` [PATCH v7 08/11] arm64: mm: Avoid TLBI when marking pages as valid Steven Price
2024-10-17 13:14 ` [PATCH v7 09/11] arm64: Enable memory encrypt for Realms Steven Price
2025-02-19 14:30 ` Steven Price
2025-02-26 19:03 ` Catalin Marinas
2025-02-27 0:23 ` Will Deacon
2025-02-27 10:45 ` Steven Price
2025-02-27 10:55 ` Catalin Marinas
2025-02-27 17:22 ` Will Deacon
2025-02-27 21:21 ` Catalin Marinas
2024-10-17 13:14 ` [PATCH v7 10/11] virt: arm-cca-guest: TSM_REPORT support for realms Steven Price
2024-10-22 11:06 ` Catalin Marinas
2024-10-23 3:33 ` Gavin Shan
2024-10-23 3:29 ` Gavin Shan
2024-12-04 21:16 ` Dan Williams
2024-12-05 11:51 ` Catalin Marinas [this message]
2024-10-17 13:14 ` [PATCH v7 11/11] arm64: Document Arm Confidential Compute Steven Price
2024-10-23 10:02 ` [PATCH v7 00/11] arm64: Support for running as a guest in Arm CCA Catalin Marinas
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