Hi Jonathan,
On 2021-02-22 09:35, Jonathan Neuschäfer wrote:
Hi,
On Mon, Feb 08, 2021 at 09:57:32AM +0000, Marc Zyngier wrote:
It seems that the CPU known as Apple M1 has the terrible habit
of being stuck with HCR_EL2.E2H==1, in violation of the architecture.
Minor nitpick from the sideline: The M1 SoC has two kinds of CPU in it
(Icestorm and Firestorm), which makes "CPU known as Apple M1" a bit
imprecise.
Fair enough. How about something along the lines of:
"At least some of the CPUs integrated in the Apple M1 SoC have
the terrible habit..."
In practicality it seems unlikely though, that Icestorm and Firestorm
act differently with regards to the code in this patch.
This is my hunch as well. And if they did, it shouldn't be a big deal:
the "architecture compliant" CPUs would simply transition via EL1
as expected, and join their buggy friends running at EL2 slightly later.
Thanks,
M.
--
Jazz is not dead. It just smells funny...
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