linux-kernel - [PATCH v3 0/3] KVM: arm64: Separate the hyp FF-A buffers init from the host

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Message-ID: <20250318162510.3280359-1-sebastianene@google.com>
Date: Tue, 18 Mar 2025 16:25:07 +0000
From: Sebastian Ene <sebastianene@...gle.com>
To: catalin.marinas@....com, joey.gouly@....com, maz@...nel.org, 
	oliver.upton@...ux.dev, sebastianene@...gle.com, snehalreddy@...gle.com, 
	sudeep.holla@....com, suzuki.poulose@....com, vdonnefort@...gle.com, 
	will@...nel.org, yuzenghui@...wei.com
Cc: kvmarm@...ts.linux.dev, linux-arm-kernel@...ts.infradead.org, 
	linux-kernel@...r.kernel.org, kernel-team@...roid.com
Subject: [PATCH v3 0/3] KVM: arm64: Separate the hyp FF-A buffers init from
 the host

Hello,

This moves the initialization of the hypervisor FF-A buffers
away from the host FF-A map calling path. If the hypervisor
cannot map the buffers with Trustzone, it rejects any FF-A call
when it runs under protected mode. 
Other than that it moves the definitions of the ffa_to_linux_err
map from the arm_ffa driver to the ffa header so that the hyp code
can make use of it.

*** Changelog ***

v2 -> this version:

- dropped the "Map the hypervisor FF-A buffers on ffa init" patch
- added ack & reviewed-by tags
- don't release the ownership of the RX buffer if the flag from
 FFA_GET_PARTITION is (1)

v1 -> v2:

Split the patch that maps the ff-a buffers of ffa init and introduce
"Move the ffa_to_linux definition to the ffa header".

Thanks,


Sebastian Ene (3):
  KVM: arm64: Use the static initializer for the version lock
  firmware: arm_ffa: Move the ffa_to_linux definition to the ffa header
  KVM: arm64: Release the ownership of the hyp rx buffer to Trustzone

 arch/arm64/kvm/hyp/nvhe/ffa.c     | 12 +++++++-----
 drivers/firmware/arm_ffa/driver.c | 24 ------------------------
 include/linux/arm_ffa.h           | 27 +++++++++++++++++++++++++++
 3 files changed, 34 insertions(+), 29 deletions(-)

-- 
2.49.0.rc1.451.g8f38331e32-goog