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Re: [PATCH 8/8] hw/arm/virt: Disable highmem when on hypervisor.framewor

From: Peter Maydell
Subject: Re: [PATCH 8/8] hw/arm/virt: Disable highmem when on hypervisor.framework
Date: Thu, 26 Nov 2020 22:33:21 +0000

On Thu, 26 Nov 2020 at 22:17, Alexander Graf <agraf@csgraf.de> wrote:
> Are you suggesting that on boot, we start a tiny mini-VM to enumerate
> the PARange and set highmem based on it? That sounds like absolute
> overkill to me ...

You'll likely want that for a bunch of other information too.
The KVM version of this is kvm_arm_create_scratch_host_vcpu().

In particular you must populate the ID register information
correctly because target/arm code is steadily migrating
towards "don't have ARM_FEATURE_* bits, just look at ID
register fields". You'll want some equivalent of
kvm_arm_get_host_cpu_features(), I expect.

-- PMM

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