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,
Alexey Kardashevskiy <aik@ozlabs.ru>,
Alexander Graf <agraf@suse.de>
Subject: Re: [Qemu-devel] [RFC PATCH v2 01/21] ppc/xive: introduce a skeleton for the sPAPR XIVE interrupt controller
Date: Tue, 26 Sep 2017 11:45:02 +0200 [thread overview]
Message-ID: <1506419102.2541.11.camel@kernel.crashing.org> (raw)
In-Reply-To: <20170926035423.GH12504@umbus>
On Tue, 2017-09-26 at 13:54 +1000, David Gibson wrote:
> > >
> > > Which ones? My impression was that there needed to be at least #cpus
> > > * #priority-levels EQs, but there could be more than that,
> >
> > euh no, not in spapr mode at least. There are 8 queues per cpu.
>
> Ok.
There's a HW feature of XIVE in DD2.x that I will start exploiting soon
that sacrifices a queue btw, keep that in mind.
We should probably only expose 0...6 to guests, not 0...7.
> > > so it was no longer as tightly bound to the number if "interrupt servers"> as xics.
> >
> > ah. I think I see what you mean, that we could allocate them on the
> > fly when needed by some hcalls ?
>
> Not at hcall time, no, but at cpu hot(un)plug time I was wondering if we
> could (de)allocate them then.
>
> > The other place where I use the nr_targets is to provision the
> > IRQ numbers for the IPIs but that could probably be done in some
> > other way, specially it there is a IRQ allocator at the machine
> > level.
>
> Hm, ok.
>
next prev parent reply other threads:[~2017-09-26 9:45 UTC|newest]
Thread overview: 90+ messages / expand[flat|nested] mbox.gz Atom feed top
2017-09-11 17:12 [Qemu-devel] [RFC PATCH v2 00/21] Guest exploitation of the XIVE interrupt controller (POWER9) Cédric Le Goater
2017-09-11 17:12 ` [Qemu-devel] [RFC PATCH v2 01/21] ppc/xive: introduce a skeleton for the sPAPR XIVE interrupt controller Cédric Le Goater
2017-09-19 2:27 ` David Gibson
2017-09-19 13:15 ` Cédric Le Goater
2017-09-22 11:00 ` David Gibson
2017-09-22 12:42 ` Cédric Le Goater
2017-09-26 3:54 ` David Gibson
2017-09-26 9:45 ` Benjamin Herrenschmidt [this message]
2017-11-16 16:48 ` Cédric Le Goater
2017-11-16 15:58 ` Cédric Le Goater
2017-09-11 17:12 ` [Qemu-devel] [RFC PATCH v2 02/21] migration: add VMSTATE_STRUCT_VARRAY_UINT32_ALLOC Cédric Le Goater
2017-09-11 17:12 ` [Qemu-devel] [RFC PATCH v2 03/21] ppc/xive: define the XIVE internal tables Cédric Le Goater
2017-09-19 2:39 ` David Gibson
2017-09-19 13:46 ` Cédric Le Goater
2017-09-20 4:33 ` David Gibson
2017-09-11 17:12 ` [Qemu-devel] [RFC PATCH v2 04/21] ppc/xive: provide a link to the sPAPR ICS object under XIVE Cédric Le Goater
2017-09-11 22:04 ` [Qemu-devel] [Qemu-ppc] " Greg Kurz
2017-09-12 5:47 ` Cédric Le Goater
2017-09-19 2:44 ` [Qemu-devel] " David Gibson
2017-09-19 14:46 ` Cédric Le Goater
2017-09-11 17:12 ` [Qemu-devel] [RFC PATCH v2 05/21] ppc/xive: allocate IRQ numbers for the IPIs Cédric Le Goater
2017-09-19 2:45 ` David Gibson
2017-09-19 14:52 ` Cédric Le Goater
2017-09-20 4:35 ` David Gibson
2017-09-11 17:12 ` [Qemu-devel] [RFC PATCH v2 06/21] ppc/xive: introduce handlers for interrupt sources Cédric Le Goater
2017-09-19 2:48 ` David Gibson
2017-09-19 15:08 ` Cédric Le Goater
2017-09-20 4:38 ` David Gibson
2017-09-21 14:11 ` Cédric Le Goater
2017-09-11 17:12 ` [Qemu-devel] [RFC PATCH v2 07/21] ppc/xive: add MMIO handlers for the XIVE " Cédric Le Goater
2017-09-19 2:57 ` David Gibson
2017-09-20 12:54 ` Cédric Le Goater
2017-09-22 10:58 ` David Gibson
2017-09-22 12:26 ` Cédric Le Goater
2017-09-28 8:27 ` Benjamin Herrenschmidt
2017-09-20 13:05 ` Cédric Le Goater
2017-09-28 8:29 ` Benjamin Herrenschmidt
2017-09-28 13:20 ` David Gibson
2017-09-11 17:12 ` [Qemu-devel] [RFC PATCH v2 08/21] ppc/xive: describe the XIVE interrupt source flags Cédric Le Goater
2017-09-11 17:12 ` [Qemu-devel] [RFC PATCH v2 09/21] ppc/xive: extend the interrupt presenter model for XIVE Cédric Le Goater
2017-09-19 7:36 ` David Gibson
2017-09-19 19:28 ` Cédric Le Goater
2017-09-22 10:58 ` David Gibson
2017-09-22 12:27 ` Cédric Le Goater
2017-09-11 17:12 ` [Qemu-devel] [RFC PATCH v2 10/21] ppc/xive: add MMIO handlers for the XIVE TIMA Cédric Le Goater
2017-09-11 17:12 ` [Qemu-devel] [RFC PATCH v2 11/21] ppc/xive: push the EQ data in OS event queue Cédric Le Goater
2017-09-19 7:45 ` David Gibson
2017-09-19 19:36 ` Cédric Le Goater
2017-09-20 6:34 ` David Gibson
2017-09-28 8:12 ` Benjamin Herrenschmidt
2017-09-11 17:12 ` [Qemu-devel] [RFC PATCH v2 12/21] ppc/xive: notify the CPU when interrupt priority is more privileged Cédric Le Goater
2017-09-19 7:50 ` David Gibson
2017-09-11 17:12 ` [Qemu-devel] [RFC PATCH v2 13/21] ppc/xive: handle interrupt acknowledgment by the O/S Cédric Le Goater
2017-09-19 7:53 ` David Gibson
2017-09-20 9:40 ` Cédric Le Goater
2017-09-28 8:14 ` Benjamin Herrenschmidt
2017-09-11 17:12 ` [Qemu-devel] [RFC PATCH v2 14/21] ppc/xive: add support for the SET_OS_PENDING command Cédric Le Goater
2017-09-19 7:55 ` David Gibson
2017-09-20 9:47 ` Cédric Le Goater
2017-09-28 8:18 ` Benjamin Herrenschmidt
2017-09-11 17:12 ` [Qemu-devel] [RFC PATCH v2 15/21] spapr: modify spapr_populate_pci_dt() to use a 'nr_irqs' argument Cédric Le Goater
2017-09-19 7:56 ` David Gibson
2017-09-20 9:49 ` Cédric Le Goater
2017-09-11 17:12 ` [Qemu-devel] [RFC PATCH v2 16/21] spapr: add a XIVE object to the sPAPR machine Cédric Le Goater
2017-09-19 8:38 ` David Gibson
2017-09-20 9:51 ` Cédric Le Goater
2017-09-11 17:12 ` [Qemu-devel] [RFC PATCH v2 17/21] ppc/xive: add hcalls support Cédric Le Goater
2017-09-11 17:12 ` [Qemu-devel] [RFC PATCH v2 18/21] ppc/xive: add device tree support Cédric Le Goater
2017-09-19 8:44 ` David Gibson
2017-09-20 12:26 ` Cédric Le Goater
2017-09-21 1:35 ` David Gibson
2017-09-21 11:21 ` Cédric Le Goater
2017-09-22 10:54 ` David Gibson
2017-09-28 8:43 ` Benjamin Herrenschmidt
2017-09-28 8:51 ` Cédric Le Goater
2017-09-28 10:03 ` Benjamin Herrenschmidt
2017-09-28 12:50 ` Cédric Le Goater
2017-09-28 8:31 ` Benjamin Herrenschmidt
2017-09-11 17:12 ` [Qemu-devel] [RFC PATCH v2 19/21] ppc/xive: introduce a helper to map the XIVE memory regions Cédric Le Goater
2017-09-11 17:12 ` [Qemu-devel] [RFC PATCH v2 20/21] ppc/xics: introduce a qirq_get() helper in the XICSFabric Cédric Le Goater
2017-09-11 17:12 ` [Qemu-devel] [RFC PATCH v2 21/21] spapr: activate XIVE exploitation mode Cédric Le Goater
2017-09-19 8:20 ` [Qemu-devel] [RFC PATCH v2 00/21] Guest exploitation of the XIVE interrupt controller (POWER9) David Gibson
2017-09-19 8:46 ` David Gibson
2017-09-20 12:33 ` Cédric Le Goater
2017-09-21 1:25 ` David Gibson
2017-09-21 14:18 ` Cédric Le Goater
2017-09-22 10:33 ` David Gibson
2017-09-22 12:32 ` Cédric Le Goater
2017-09-28 8:23 ` Benjamin Herrenschmidt
2017-09-28 13:17 ` David Gibson
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