Re: [PATCH kvm-unit-tests 2/3] arm64: timer: Fix test on APM X-Gene

From: Paolo Bonzini <pbonzini@redhat.com>
To: Andrew Jones <drjones@redhat.com>, Christoffer Dall <cdall@linaro.org>
Cc: kvm@vger.kernel.org, Marc Zyngier <marc.zyngier@arm.com>,
	kvmarm@lists.cs.columbia.edu
Subject: Re: [PATCH kvm-unit-tests 2/3] arm64: timer: Fix test on APM X-Gene
Date: Mon, 24 Jul 2017 19:13:44 +0200	[thread overview]
Message-ID: <b7900fdf-bcc0-00af-bf5d-940eca09e4ae@redhat.com> (raw)
In-Reply-To: <20170718121527.ptemrr6mbhfwwbwe@kamzik.brq.redhat.com>

On 18/07/2017 14:15, Andrew Jones wrote:
>>
>> If we want to add a "the platform provides a timer with 56 valid bits in
>> the counter and compare register", then I think it should be a separate
>> test, and the the user can see that "basic stuff works", "architecture
>> compliance not so much" and shrug accordingly.
> Two separate tests sounds good to me. Although, if the value of 'now' is
> large enough that now + 10s will set bit 31, then a mustang run (at least
> mine) will fail - and most likely cause a lot of confusion, since it
> normally does not. We should probably attempt to address that known issue
> in some way as well.

Is the value relative to vm startup or host startup?

Paolo