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Re: [PATCH v2] hvf: arm: Ignore cache operations on MMIO

From: Richard Henderson
Subject: Re: [PATCH v2] hvf: arm: Ignore cache operations on MMIO
Date: Mon, 1 Nov 2021 14:02:27 -0400
User-agent: Mozilla/5.0 (X11; Linux x86_64; rv:78.0) Gecko/20100101 Thunderbird/78.13.0

On 10/26/21 3:12 AM, Alexander Graf wrote:
Apple's Hypervisor.Framework forwards cache operations as MMIO traps
into user space. For MMIO however, these have no meaning: There is no
cache attached to them.

So let's just treat cache data exits as nops.

This fixes OpenBSD booting as guest.

Signed-off-by: Alexander Graf <agraf@csgraf.de>
Reported-by: AJ Barris <AwlsomeAlex@github.com>
Reference: https://github.com/utmapp/UTM/issues/3197
  target/arm/hvf/hvf.c | 7 +++++++
  1 file changed, 7 insertions(+)

Thanks, applied to target-arm.next


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