From mboxrd@z Thu Jan 1 00:00:00 1970 From: mark.rutland@arm.com (Mark Rutland) Date: Fri, 13 Mar 2015 10:34:54 +0000 Subject: [PATCH v3 2/4] arm64: dts: Add Qualcomm MSM8916 SoC and evaluation board dts In-Reply-To: References: <1426107080-29079-1-git-send-email-galak@codeaurora.org> <1426107080-29079-2-git-send-email-galak@codeaurora.org> <20150312170541.GE30145@leverpostej> <20150312182508.GF30145@leverpostej> Message-ID: <20150313103453.GA3592@leverpostej> To: linux-arm-kernel@lists.infradead.org List-Id: linux-arm-kernel.lists.infradead.org > > Which of spin-table/psci are you planning on using for SMP support, and > > when would that be likely to appear? > > We have a qcom specific SMP enablement method for this device. This > was one of our first devices so it utilized as much from arm 32-bit as > possible. Implementation specific enable methods are something we really don't want to see for arm64. If PSCI is out of the question then a spin-table shim in your bootloader shouldn't be too hard to implement. > > Which exception level do CPUs enter the kernel? Even without a > > virt-capable GIC booting at EL2 is less work for the FW and gives the > > kernel a better chance of fixing things up (e.g. CNTVOFF). > > I think the enter in EL1. That's unfortunate, but so long as they are consistent, it's not the end of the world. Mark.