From: Will Deacon <will@kernel.org>
To: "Saidi, Ali" <alisaidi@amazon.com>
Cc: Will Deacon <will.deacon@arm.com>,
Mark Rutland <mark.rutland@arm.com>,
"linux-arm-kernel@lists.infradead.org"
<linux-arm-kernel@lists.infradead.org>,
Herbert Xu <herbert@gondor.apana.org.au>,
Arnd Bergmann <arnd@arndb.de>,
Greg Kroah-Hartman <gregkh@linuxfoundation.org>,
Benjamin Herrenschmidt <benh@kernel.crashing.org>,
Matt Mackall <mpm@selenic.com>,
"linux-kernel@vger.kernel.org" <linux-kernel@vger.kernel.org>,
"Rindjunsky, Ron" <ronrindj@amazon.com>,
"linux-crypto@vger.kernel.org" <linux-crypto@vger.kernel.org>,
Catalin Marinas <catalin.marinas@arm.com>,
"Woodhouse, David" <dwmw@amazon.co.uk>
Subject: Re: [PATCH 0/3] Add support for Graviton TRNG
Date: Mon, 1 Jul 2019 09:28:06 +0100 [thread overview]
Message-ID: <20190701082805.pifv4attux4mddld@willie-the-truck> (raw)
In-Reply-To: <3104F396-094F-454C-8308-BF651FAB99AB@amazon.com>
[Note: this was in my spam folder]
On Fri, Jun 28, 2019 at 06:05:10PM +0000, Saidi, Ali wrote:
> On 6/7/19, 7:59 AM, " Ali Saidi" <alisaidi@amazon.com> wrote:
> On 6/5/19, 7:20 AM, "Will Deacon" <will.deacon@arm.com> wrote:
> On Tue, Jun 04, 2019 at 08:30:57PM +0000, Ali Saidi wrote:
> > 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.
>
> Curious, but why this over something like virtio-rng?
>
> This interface allows us to provide the functionality from both EL2
> and EL3 and support multiple different types of our instances which we
> unfortunately can't do with virt-io.
>
> Any additional comments?
> Do you know when you'll have a chance to rebase arm64/smccc-cleanup?
Sorry, Ali, this slipped through the cracks. Marc and I will chat today and
look at respinning what we had before; it should then hopefully be
straightforward enough for you to take that as a base for what you want to
do.
Will
next prev parent reply other threads:[~2019-07-01 8:28 UTC|newest]
Thread overview: 13+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-06-04 20:30 [PATCH 0/3] Add support for Graviton TRNG Ali Saidi
2019-06-04 20:30 ` [PATCH 1/3] arm/arm64: Add smccc hypervisor service identifiers Ali Saidi
2019-06-04 20:30 ` [PATCH 2/3] arm64: export acpi_psci_use_hvc Ali Saidi
2019-06-05 9:40 ` Sudeep Holla
2019-06-05 10:38 ` Mark Rutland
2019-06-05 11:02 ` Sudeep Holla
2019-06-05 16:07 ` Saidi, Ali
2019-06-04 20:31 ` [PATCH 3/3] hwrng: Add support for AWS Graviton TRNG Ali Saidi
2019-06-05 12:20 ` [PATCH 0/3] Add support for " Will Deacon
2019-06-07 12:58 ` Saidi, Ali
2019-06-28 18:05 ` Saidi, Ali
2019-07-01 8:28 ` Will Deacon [this message]
2019-07-01 17:02 ` Will Deacon
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