From: Christoffer Dall <christoffer.dall@linaro.org>
To: Peter Maydell <peter.maydell@linaro.org>
Cc: Marc Zyngier <marc.zyngier@arm.com>,
kvm-devel <kvm@vger.kernel.org>,
"kvmarm@lists.cs.columbia.edu" <kvmarm@lists.cs.columbia.edu>
Subject: Re: [PATCH 4/4] arm/arm64: KVM: use kernel mapping to perform invalidation on page fault
Date: Tue, 13 Jan 2015 14:49:16 +0100 [thread overview]
Message-ID: <20150113134916.GH26222@cbox> (raw)
In-Reply-To: <CAFEAcA8OCX2teGx0JVkqSjA88QTGou_HD3hkTJH02=e1zNxWKQ@mail.gmail.com>
On Tue, Jan 13, 2015 at 01:41:03PM +0000, Peter Maydell wrote:
> On 13 January 2015 at 13:35, Christoffer Dall
> <christoffer.dall@linaro.org> wrote:
> > Wouldn't a guest (and I believe Linux does this) reserve ASID 0 for
> > additional cores and use ASID 1+++ for itself?
>
> If the guest reserves an ASID for "MMU disabled" then yes, that would
> work. The question of course is whether all guests do that...
>
which ASID would match for MMU disabled? Did you come across that in
the ARM ARM somewhere?
The fact that Linux does it would indicate that this may be a
requirement on real hardware too and therefore all guests have to do
it...
-Christoffer
next prev parent reply other threads:[~2015-01-13 13:49 UTC|newest]
Thread overview: 45+ messages / expand[flat|nested] mbox.gz Atom feed top
2015-01-08 11:59 [PATCH 0/4] arm/arm64: KVM: Random selection of MM related fixes Marc Zyngier
2015-01-08 11:59 ` [PATCH 1/4] mm: Correct ordering of *_clear_flush_young_notify Marc Zyngier
2015-01-08 13:12 ` Paolo Bonzini
2015-01-08 19:00 ` Andrea Arcangeli
2015-01-12 10:15 ` Steve Capper
2015-01-08 11:59 ` [PATCH 2/4] arm/arm64: KVM: Use set/way op trapping to track the state of the caches Marc Zyngier
2015-01-09 11:19 ` Christoffer Dall
2015-01-09 11:38 ` Marc Zyngier
2015-01-09 12:12 ` Christoffer Dall
2015-01-08 11:59 ` [PATCH 3/4] arm/arm64: KVM: Flush caches to memory on unmap Marc Zyngier
2015-01-09 12:30 ` Christoffer Dall
2015-01-09 14:35 ` Marc Zyngier
2015-01-11 12:30 ` Christoffer Dall
2015-01-12 11:15 ` Marc Zyngier
2015-01-12 20:13 ` Christoffer Dall
2015-01-13 13:47 ` Christoffer Dall
2015-01-13 13:57 ` Marc Zyngier
2015-01-08 11:59 ` [PATCH 4/4] arm/arm64: KVM: use kernel mapping to perform invalidation on page fault Marc Zyngier
2015-01-08 12:30 ` Peter Maydell
2015-01-08 13:07 ` Marc Zyngier
2015-01-08 13:16 ` Peter Maydell
2015-01-08 15:06 ` Marc Zyngier
2015-01-08 15:21 ` Peter Maydell
2015-01-09 12:50 ` Christoffer Dall
2015-01-09 13:03 ` Peter Maydell
2015-01-09 14:16 ` Marc Zyngier
2015-01-09 15:28 ` Peter Maydell
2015-01-09 17:18 ` Marc Zyngier
2015-01-11 12:33 ` Christoffer Dall
2015-01-11 17:37 ` Peter Maydell
2015-01-11 17:58 ` Christoffer Dall
2015-01-11 18:27 ` Peter Maydell
2015-01-11 18:38 ` Christoffer Dall
2015-01-12 9:58 ` Marc Zyngier
2015-01-12 20:10 ` Christoffer Dall
2015-01-13 11:38 ` Marc Zyngier
2015-01-13 12:04 ` Christoffer Dall
2015-01-13 12:12 ` Peter Maydell
2015-01-13 13:35 ` Christoffer Dall
2015-01-13 13:41 ` Peter Maydell
2015-01-13 13:49 ` Christoffer Dall [this message]
2015-01-15 12:00 ` Mark Rutland
2015-01-15 13:00 ` Christoffer Dall
2015-01-15 15:47 ` Mark Rutland
2015-01-09 12:51 ` Christoffer Dall
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