From: Paolo Bonzini <pbonzini@redhat.com>
To: Mark Rutland <mark.rutland@arm.com>
Cc: Peter Maydell <peter.maydell@linaro.org>,
Arnd Bergmann <arnd@arndb.de>,
"linaro-acpi@lists.linaro.org" <linaro-acpi@lists.linaro.org>,
Paul Mundt <Paul.Mundt@huawei.com>,
Claudio Fontana <claudio.fontana@huawei.com>,
QEMU Developers <qemu-devel@nongnu.org>,
Jani Kokkonen <Jani.Kokkonen@huawei.com>,
"tech@virtualopensystems.com" <tech@virtualopensystems.com>,
Christoffer Dall <christoffer.dall@linaro.org>
Subject: Re: [Qemu-devel] [Linaro-acpi] [RFC PATCH 0/7] hw/arm/virt: Dynamic ACPI v5.1 table generation
Date: Wed, 12 Nov 2014 13:27:14 +0100 [thread overview]
Message-ID: <54635222.5000700@redhat.com> (raw)
In-Reply-To: <20141112121809.GF28015@leverpostej>
On 12/11/2014 13:18, Mark Rutland wrote:
> On Wed, Nov 12, 2014 at 11:48:27AM +0000, Paolo Bonzini wrote:
>>
>> On 12/11/2014 12:34, Christoffer Dall wrote:
>>> AFAIU ACPI already has a method for doing this
>>
>> It's not defined in the spec. QEMU defines a bunch of registers to do
>> that, and provides AML that works with those registers.
>
> Huh? SCI + AML is the method, and that's defined by the spec.
I thought Christoffer meant a method to do the actual hotplug, not just
to signal events. If you want to "support the low-level interfaces in
the kernel for this anyway", you certainly need to know the details
underneath the AML.
>> Perhaps you could treat it as a shared level-triggered interrupt in DT?
>> I don't know.
>
> Putting an interrupt in DT is trivial. The hard part is the rest of the
> interface, which so far there is no specification for.
Have you looked at docs/specs/acpi_{cpu,mem}_hotplug.txt? Writing a DT
binding for it is trivial too. Or are we talking about two different
things?
Paolo
next prev parent reply other threads:[~2014-11-12 12:27 UTC|newest]
Thread overview: 71+ messages / expand[flat|nested] mbox.gz Atom feed top
2014-10-30 17:43 [Qemu-devel] [RFC PATCH 0/7] hw/arm/virt: Dynamic ACPI v5.1 table generation Alexander Spyridakis
2014-10-30 17:43 ` [Qemu-devel] [RFC PATCH 1/7] hw/i386: Move ACPI header definitions in an arch-independent location Alexander Spyridakis
2014-10-30 17:44 ` [Qemu-devel] [RFC PATCH 2/7] hw/arm/virt-acpi: Basic skeleton for dynamic generation of ACPI tables Alexander Spyridakis
2014-10-30 17:46 ` Peter Maydell
2014-10-30 17:52 ` [Qemu-devel] [RFC PATCH 0/7] hw/arm/virt: Dynamic ACPI v5.1 table generation Peter Maydell
2014-10-30 18:02 ` [Qemu-devel] [Linaro-acpi] " Mark Rutland
2014-11-05 9:58 ` Claudio Fontana
2014-11-06 12:44 ` Peter Maydell
2014-11-06 12:57 ` Igor Mammedov
2014-11-06 13:33 ` Alexander Spyridakis
2014-11-06 13:52 ` Peter Maydell
2014-11-11 15:29 ` Mark Rutland
2014-11-11 16:31 ` Christoffer Dall
2014-11-11 16:48 ` Mark Rutland
2014-11-11 21:33 ` Christoffer Dall
2014-11-12 10:38 ` Mark Rutland
2014-11-12 10:44 ` Christoffer Dall
2014-11-12 10:55 ` Julien Grall
2014-11-12 11:07 ` Mark Rutland
2014-11-12 11:38 ` Graeme Gregory
2014-11-12 11:52 ` Paolo Bonzini
2014-11-12 12:04 ` Mark Rutland
2014-11-12 12:12 ` Paolo Bonzini
2014-11-12 13:27 ` Peter Maydell
2014-11-12 13:32 ` Paolo Bonzini
2014-11-12 15:01 ` Claudio Fontana
2014-11-12 15:32 ` Arnd Bergmann
2014-11-12 15:39 ` Peter Maydell
2014-11-12 15:52 ` Paolo Bonzini
2014-11-12 15:57 ` Arnd Bergmann
2014-11-12 16:04 ` Paolo Bonzini
2014-11-12 16:13 ` Arnd Bergmann
2014-11-12 16:25 ` Paolo Bonzini
2014-11-12 17:33 ` Peter Maydell
2014-11-13 8:32 ` Gerd Hoffmann
2014-11-13 8:14 ` Gerd Hoffmann
2014-11-13 8:10 ` Gerd Hoffmann
2014-11-13 18:16 ` Al Stone
2014-11-13 19:22 ` Paolo Bonzini
2014-11-14 7:54 ` Gerd Hoffmann
2014-11-12 9:08 ` Claudio Fontana
2014-11-12 10:56 ` Mark Rutland
2014-11-12 11:15 ` Arnd Bergmann
2014-11-12 11:34 ` Christoffer Dall
2014-11-12 11:48 ` Paolo Bonzini
2014-11-12 12:18 ` Mark Rutland
2014-11-12 12:27 ` Paolo Bonzini [this message]
2014-11-12 12:40 ` Christoffer Dall
2014-11-12 13:08 ` Arnd Bergmann
2014-11-12 13:27 ` Paolo Bonzini
2014-11-12 13:41 ` Mark Rutland
2014-11-12 13:59 ` Paolo Bonzini
2014-11-12 14:10 ` Mark Rutland
2014-11-12 14:46 ` Paolo Bonzini
2014-11-12 13:03 ` Arnd Bergmann
2014-11-12 13:35 ` Christoffer Dall
2014-11-12 11:55 ` Mark Rutland
2014-11-12 18:10 ` Peter Maydell
2014-11-13 9:57 ` Claudio Fontana
2014-11-17 17:52 ` Peter Maydell
2014-11-06 6:53 ` Hanjun Guo
2014-11-06 13:30 ` Mark Rutland
2014-11-06 13:33 ` Arnd Bergmann
2014-11-06 15:57 ` Paolo Bonzini
2014-11-06 16:18 ` Igor Mammedov
2014-11-06 16:27 ` Paolo Bonzini
2014-11-07 8:31 ` Hanjun Guo
2015-03-09 12:12 ` Leif Lindholm
2015-03-09 12:28 ` Peter Maydell
2015-03-09 12:47 ` Shannon Zhao
2015-03-09 14:50 ` Leif Lindholm
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