Re: [Qemu-devel] [PATCH v7 00/11] target-arm: Parts of the AArch64 EL2/3 exception model

[Jan Kiszka <jan.kiszka@siemens.com>]

On 2014-09-29 12:41, Peter Maydell wrote:
> On 29 September 2014 11:31, Jan Kiszka <jan.kiszka@siemens.com> wrote:
>> Sorry for hijacking the thread, but it seems related: These bits address
>> AArch64, but what is the status of AArch32 /wrt hyp mode emulation?
>> After playing with the "fast" model, I would be glad to find such
>> support in QEMU rather sooner than later.
> 
> I don't think anybody is currently working on that,
> though it is an obvious gap to fill in at some point.
> 
> I would caution against testing hypervisors on QEMU
> rather than against hardware or the Fast Model,
> except for anything other than basic smoke tests,
> though -- there are a lot of complications and corner
> cases in the architecture here and I expect we will
> spend some time flushing out bugs as OSes expose
> them.

No difference with nested virt for KVM: I fixed several corner cases
along the way of getting Jailhouse running on x86. This time we already
have a working baseline, so shaking out bugs might be even easier. What
matters more mid- and long-term is the round-trip time, in fact.

Jan

-- 
Siemens AG, Corporate Technology, CT RTC ITP SES-DE
Corporate Competence Center Embedded Linux