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Re: [Qemu-devel] [PATCH RFC V5 9/9] hw/arm: Add virt-v3 machine that use


From: Pavel Fedin
Subject: Re: [Qemu-devel] [PATCH RFC V5 9/9] hw/arm: Add virt-v3 machine that uses GIC-500
Date: Wed, 21 Oct 2015 13:30:59 +0300

 Hello!

> I see, just how do I pass the gic version from the command line?

 Easy. -machine virt,gic-version=3

> GICV3 is accessed by system instructions that exists only in ARCH64.

 Wrong. In 32-bit mode the CPU sees them as CP15 registers. See "8.5 AArch32 
System register descriptions".
 I would say, system registers are nothing new, these are just renamed CP15 
registers, with "CPn" prefix removed.

Kind regards,
Pavel Fedin
Expert Engineer
Samsung Electronics Research center Russia





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