From: Yeoreum Yun <yeoreum.yun@arm.com>
To: Sudeep Holla <sudeep.holla@kernel.org>
Cc: Marc Zyngier <maz@kernel.org>,
linux-security-module@vger.kernel.org,
linux-kernel@vger.kernel.org, linux-integrity@vger.kernel.org,
linux-arm-kernel@lists.infradead.org, kvmarm@lists.linux.dev,
paul@paul-moore.com, jmorris@namei.org, serge@hallyn.com,
zohar@linux.ibm.com, roberto.sassu@huawei.com,
dmitry.kasatkin@gmail.com, eric.snowberg@oracle.com,
peterhuewe@gmx.de, jarkko@kernel.org, jgg@ziepe.ca,
oupton@kernel.org, joey.gouly@arm.com, suzuki.poulose@arm.com,
yuzenghui@huawei.com, catalin.marinas@arm.com, will@kernel.org
Subject: Re: [RFC PATCH 4/4] firmware: arm_ffa: check pkvm initailised when initailise ffa driver
Date: Tue, 21 Apr 2026 10:12:01 +0100 [thread overview]
Message-ID: <aec/YSxYO1bOhXhn@e129823.arm.com> (raw)
In-Reply-To: <20260421-married-liberal-ammonite-dffda8@sudeepholla>
> On Tue, Apr 21, 2026 at 07:57:43AM +0100, Yeoreum Yun wrote:
>
> [...]
>
> >
> > Also, the FF-A initialization is not driven by a device probe, but rather
> > happens as part of the bus registration itself,
> > so it does not fit well with a device_link or probe deferral based approach.
> >
> > Instead, perhaps we could go with the idea I mentioned previously:
> > either introduce a notifier, or create a pseudo ffa_device
> > once pKVM initialization has completed, and
> > then let the ffa driver perform the additional initialization from there.
> >
> > Am I missing something?
> >
>
> In order to handle/cleanup some ugliness in interrupt management in the
> FF-A driver, we may introduce DT node eventually. But it will take sometime.
Unfortunately, I think this DT node wouldn't be helpful to solve
this situation for dependency with the kvm misc device...
IMHO, current situation, the notifier seems to good option. unless
we make the initcall to recongise this dependency.
--
Sincerely,
Yeoreum Yun
next prev parent reply other threads:[~2026-04-21 9:12 UTC|newest]
Thread overview: 32+ messages / expand[flat|nested] mbox.gz Atom feed top
2026-04-17 17:57 [RFC PATCH 0/4] fix FF-A call failed with pKVM when ff-a driver is built-in Yeoreum Yun
2026-04-17 17:57 ` [RFC PATCH 1/4] security: ima: move ima_init into late_initcall_sync Yeoreum Yun
2026-04-20 10:32 ` Jonathan McDowell
2026-04-21 9:37 ` Yeoreum Yun
2026-04-21 12:00 ` Mimi Zohar
2026-04-21 12:50 ` Yeoreum Yun
2026-04-21 13:26 ` Mimi Zohar
2026-04-21 14:09 ` Yeoreum Yun
2026-04-17 17:57 ` [RFC PATCH 2/4] tpm: tpm_crb_ffa: revert defered_probed when tpm_crb_ffa is built-in Yeoreum Yun
2026-04-17 17:57 ` [RFC PATCH 3/4] firmware: arm_ffa: revert ffa_init() initcall level to device_initcall Yeoreum Yun
2026-04-17 17:57 ` [RFC PATCH 4/4] firmware: arm_ffa: check pkvm initailised when initailise ffa driver Yeoreum Yun
2026-04-18 9:24 ` Marc Zyngier
2026-04-18 10:34 ` Yeoreum Yun
2026-04-19 10:41 ` Marc Zyngier
2026-04-19 11:12 ` Yeoreum Yun
2026-04-20 8:55 ` Will Deacon
2026-04-20 9:25 ` Yeoreum Yun
2026-04-20 10:42 ` Will Deacon
2026-04-20 10:56 ` Yeoreum Yun
2026-04-20 15:47 ` Sudeep Holla
2026-04-20 17:04 ` Yeoreum Yun
2026-04-21 6:57 ` Yeoreum Yun
2026-04-21 8:51 ` Sudeep Holla
2026-04-21 9:12 ` Yeoreum Yun [this message]
2026-04-20 12:32 ` Sebastian Ene
2026-04-20 12:46 ` Marc Zyngier
2026-04-20 14:20 ` Sebastian Ene
2026-04-20 15:04 ` Yeoreum Yun
2026-04-20 16:50 ` Sudeep Holla
2026-04-20 13:00 ` Yeoreum Yun
2026-04-20 14:05 ` Sebastian Ene
2026-04-20 14:47 ` Yeoreum Yun
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