From: "Cédric Le Goater" <clg@kaod.org>
To: Benjamin Herrenschmidt <benh@kernel.crashing.org>,
David Gibson <david@gibson.dropbear.id.au>
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: Thu, 16 Nov 2017 17:48:56 +0100 [thread overview]
Message-ID: <b2590798-a1fe-2202-5808-8f619aa3a5ad@kaod.org> (raw)
In-Reply-To: <1506419102.2541.11.camel@kernel.crashing.org>
On 09/26/2017 11:45 AM, Benjamin Herrenschmidt wrote:
> 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.
yes. This is achieved using the "ibm,plat-res-int-priorities" property
of the device tree.
I don't think we also need to check these priority ranges when allocating
the EQs. We can just allocate them all (8 priorities) and let the hcalls
do the checks. They should return H_P3 or H_P4 if the prio is invalid.
C.
next prev parent reply other threads:[~2017-11-16 16:49 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
2017-11-16 16:48 ` Cédric Le Goater [this message]
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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