From: Andre Przywara <andre.przywara@arm.com>
To: Will Deacon <will@kernel.org>,
Catalin Marinas <catalin.marinas@arm.com>,
Ard Biesheuvel <ardb@kernel.org>,
Russell King <linux@armlinux.org.uk>
Cc: linux-arm-kernel@lists.infradead.org,
kvmarm@lists.cs.columbia.edu, linux-kernel@vger.kernel.org,
Sudeep Holla <sudeep.holla@arm.com>,
Mark Rutland <mark.rutland@arm.com>,
Mark Brown <broonie@kernel.org>,
Lorenzo Pieralisi <lorenzo.pieralisi@arm.com>,
Linus Walleij <linus.walleij@linaro.org>
Subject: [PATCH v2 0/5] ARM: arm64: Add SMCCC TRNG entropy service
Date: Thu, 5 Nov 2020 12:56:51 +0000 [thread overview]
Message-ID: <20201105125656.25259-1-andre.przywara@arm.com> (raw)
The ARM architected TRNG firmware interface, described in ARM spec
DEN0098[1], defines an ARM SMCCC based interface to a true random number
generator, provided by firmware.
This series collects all the patches implementing this in various
places: as a user feeding into the ARCH_RANDOM pool, both for ARM and
arm64, and as a service provider for KVM guests.
Patch 1 introduces the interface definition used by all three entities.
Patch 2 prepares the Arm SMCCC firmware driver to probe for the
interface. This patch is needed to avoid a later dependency on *two*
patches (there might be a better solution to this problem).
Patch 3 implements the ARM part, patch 4 is the arm64 version.
The final patch 5 adds support to provide random numbers to KVM guests.
Compared to the initial posts, this version:
- triggers the ARCH_RANDOM initialisation from the SMCCC firmware driver
- uses a single bool in smccc.c to hold the initialisation state for arm64
- handles endianess correctly in the KVM provider
This was tested on:
- QEMU -kernel (no SMCCC, regression test)
- Juno w/ standard firmware (SMCCC, but no TRNG: regression test)
- Juno w/ "fake TRNG" firmware (to verify "random" numbers)
- Juno w/ prototype of the h/w Trusted RNG support
- mainline KVM (SMCCC, but no TRNG: regression test)
- ARM and arm64 KVM guests, using the KVM service in patch 5/5
Based on v5.10-rc2, please let me know if I should rebased on something
else. A git repo is accessible at:
https://gitlab.arm.com/linux-arm/linux-ap/-/commits/smccc-trng/v2/
Cheers,
Andre
[1] https://developer.arm.com/documentation/den0098/latest/
Andre Przywara (2):
firmware: smccc: Introduce SMCCC TRNG framework
arm64: Add support for SMCCC TRNG entropy source
Ard Biesheuvel (3):
firmware: smccc: Add SMCCC TRNG function call IDs
ARM: implement support for SMCCC TRNG entropy source
KVM: arm64: implement the TRNG hypervisor call
arch/arm/Kconfig | 4 ++
arch/arm/include/asm/archrandom.h | 74 +++++++++++++++++++++++
arch/arm64/include/asm/archrandom.h | 63 +++++++++++++++++---
arch/arm64/include/asm/kvm_host.h | 2 +
arch/arm64/kvm/Makefile | 2 +-
arch/arm64/kvm/hypercalls.c | 6 ++
arch/arm64/kvm/trng.c | 91 +++++++++++++++++++++++++++++
drivers/firmware/smccc/smccc.c | 5 ++
include/linux/arm-smccc.h | 31 ++++++++++
9 files changed, 270 insertions(+), 8 deletions(-)
create mode 100644 arch/arm/include/asm/archrandom.h
create mode 100644 arch/arm64/kvm/trng.c
--
2.17.1
next reply other threads:[~2020-11-05 12:57 UTC|newest]
Thread overview: 25+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-11-05 12:56 Andre Przywara [this message]
2020-11-05 12:56 ` [PATCH v2 1/5] firmware: smccc: Add SMCCC TRNG function call IDs Andre Przywara
2020-11-05 12:56 ` [PATCH v2 2/5] firmware: smccc: Introduce SMCCC TRNG framework Andre Przywara
2020-11-05 12:56 ` [PATCH v2 3/5] ARM: implement support for SMCCC TRNG entropy source Andre Przywara
2020-11-05 17:15 ` kernel test robot
2020-11-05 17:56 ` André Przywara
2020-11-05 17:15 ` kernel test robot
2020-11-06 15:29 ` Marc Zyngier
2020-11-06 15:30 ` Ard Biesheuvel
2020-11-06 15:35 ` Marc Zyngier
2020-11-05 12:56 ` [PATCH v2 4/5] arm64: Add " Andre Przywara
2020-11-05 13:41 ` Mark Brown
2020-11-05 14:03 ` Mark Rutland
2020-11-05 14:04 ` Ard Biesheuvel
2020-11-05 14:30 ` Mark Rutland
2020-11-05 14:34 ` Ard Biesheuvel
2020-11-05 14:45 ` Mark Rutland
2020-11-05 14:48 ` Marc Zyngier
2020-11-05 14:29 ` Mark Brown
2020-11-05 14:38 ` Mark Rutland
2020-11-12 16:03 ` André Przywara
2020-11-05 14:30 ` André Przywara
2020-11-05 12:56 ` [PATCH v2 5/5] KVM: arm64: implement the TRNG hypervisor call Andre Przywara
2020-11-05 14:13 ` Marc Zyngier
2020-11-05 16:19 ` Ard Biesheuvel
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