linux-kernel - [PATCH 0/3] Add support for Graviton TRNG

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Message-ID: <20190604203100.15050-1-alisaidi@amazon.com>
Date:   Tue, 4 Jun 2019 20:30:57 +0000
From:   Ali Saidi <alisaidi@...zon.com>
To:     <linux-kernel@...r.kernel.org>,
        <linux-arm-kernel@...ts.infradead.org>,
        <linux-crypto@...r.kernel.org>
CC:     Catalin Marinas <catalin.marinas@....com>,
        Will Deacon <will.deacon@....com>,
        Matt Mackall <mpm@...enic.com>,
        Herbert Xu <herbert@...dor.apana.org.au>,
        Arnd Bergmann <arnd@...db.de>,
        "Greg Kroah-Hartman" <gregkh@...uxfoundation.org>,
        Ali Saidi <alisaidi@...zon.com>,
        Ron Rindjunsky <ronrindj@...zon.com>,
        Benjamin Herrenschmidt <benh@...nel.crashing.org>,
        David Woodhouse <dwmw@...zon.co.uk>
Subject: [PATCH 0/3] Add support for Graviton TRNG

AWS Graviton based systems provide an Arm SMC call in the vendor defined
hypervisor region to read random numbers from a HW TRNG and return them to the
guest. 

We've observed slower guest boot and especially reboot times due to lack of
entropy and providing access to a TRNG is meant to address this. 

Ali Saidi (3):
  arm/arm64: Add smccc hypervisor service identifiers
  arm64: export acpi_psci_use_hvc
  hwrng: Add support for AWS Graviton TRNG

 MAINTAINERS                           |   6 ++
 arch/arm64/kernel/acpi.c              |   1 +
 drivers/char/hw_random/Kconfig        |  13 ++++
 drivers/char/hw_random/Makefile       |   1 +
 drivers/char/hw_random/graviton-rng.c | 123 ++++++++++++++++++++++++++++++++++
 include/linux/arm-smccc.h             |   2 +
 6 files changed, 146 insertions(+)
 create mode 100644 drivers/char/hw_random/graviton-rng.c

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