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From: Benjamin Herrenschmidt <benh@kernel.crashing.org>
To: "David Gibson" <david@gibson.dropbear.id.au>,
	"Cédric Le Goater" <clg@kaod.org>
Cc: qemu-ppc@nongnu.org, qemu-devel@nongnu.org,
	Nikunj A Dadhania <nikunj@linux.vnet.ibm.com>,
	Alexey Kardashevskiy <aik@ozlabs.ru>
Subject: Re: [Qemu-devel] [PATCH 1/2] spapr/rtas: disable the decrementer interrupt when a CPU is unplugged
Date: Fri, 06 Oct 2017 11:53:30 +0200	[thread overview]
Message-ID: <1507283610.25065.148.camel@kernel.crashing.org> (raw)
In-Reply-To: <20171006090722.GD10961@umbus.fritz.box>

On Fri, 2017-10-06 at 20:07 +1100, David Gibson wrote:
> Hm.  Checking mmu_model doesn't seem right to me.  I mean, it'll get
> the right answer in practice, but the LPCR programming has nothing
> whatsoever to do with the MMU.
> 
> I think explicitly checking if cpu_ is a POWER9 instance with
> object_dynamic_cast would be a better option.

Best is ARCH 300 ... do we hvae arch versions outside of MMU model
these days ?

Ben.

  reply	other threads:[~2017-10-06  9:54 UTC|newest]

Thread overview: 16+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2017-10-05 16:49 [Qemu-devel] [PATCH 0/2] disable the decrementer interrupt when a CPU is unplugged Cédric Le Goater
2017-10-05 16:49 ` [Qemu-devel] [PATCH 1/2] spapr/rtas: " Cédric Le Goater
2017-10-06  9:07   ` David Gibson
2017-10-06  9:53     ` Benjamin Herrenschmidt [this message]
2017-10-06 10:10       ` David Gibson
2017-10-09 14:28         ` Cédric Le Goater
2017-10-06 21:15     ` Cédric Le Goater
2017-10-07  5:16       ` David Gibson
2017-10-05 16:49 ` [Qemu-devel] [PATCH 2/2] spapr/rtas: do not reset the MSR in stop-self command Cédric Le Goater
2017-10-06  9:08   ` David Gibson
2017-10-06  6:10 ` [Qemu-devel] [PATCH 0/2] disable the decrementer interrupt when a CPU is unplugged Nikunj A Dadhania
2017-10-06  6:14   ` Cédric Le Goater
2017-10-06  7:46   ` Benjamin Herrenschmidt
2017-10-06  7:53     ` Cédric Le Goater
2017-10-06  8:11     ` Nikunj A Dadhania
2017-10-06  9:09   ` David Gibson

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