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From: Benjamin Herrenschmidt <benh@kernel.crashing.org>
To: Paul Mackerras <paulus@ozlabs.org>
Cc: kvm@vger.kernel.org, kvm-ppc@vger.kernel.org,
	"Cédric Le Goater" <clg@kaod.org>,
	linuxppc-dev@lists.ozlabs.org,
	"David Gibson" <david@gibson.dropbear.id.au>
Subject: Re: [PATCH 18/19] KVM: PPC: Book3S HV: add passthrough support
Date: Thu, 24 Jan 2019 08:25:15 +1100	[thread overview]
Message-ID: <bcb5d487547503ceaf0aefad4a63889a52ea0a02.camel@kernel.crashing.org> (raw)
In-Reply-To: <20190123103009.GB29826@blackberry>

On Wed, 2019-01-23 at 21:30 +1100, Paul Mackerras wrote:
> > Afaik bcs we change the mapping to point to the real HW irq ESB page
> > instead of the "IPI" that was there at VM init time.
> 
> So that makes it sound like there is a whole lot going on that hasn't
> even been hinted at in the patch descriptions...  It sounds like we
> need a good description of how all this works and fits together
> somewhere under Documentation/.
> 
> In any case we need much more informative patch descriptions.  I
> realize that it's all currently in Cedric's head, but I bet that in
> two or three years' time when we come to try to debug something, it
> won't be in anyone's head...

The main problem is understanding XIVE itself. It's not realistic to
ask Cedric to write a proper documentation for XIVE as part of the
patch series, but sadly IBM doesn't have a good one to provide either.

Ben.



  parent reply	other threads:[~2019-01-23 21:27 UTC|newest]

Thread overview: 135+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2019-01-07 18:43 [PATCH 00/19] KVM: PPC: Book3S HV: add XIVE native exploitation mode Cédric Le Goater
2019-01-07 18:43 ` [PATCH 01/19] powerpc/xive: export flags for the XIVE native exploitation mode hcalls Cédric Le Goater
2019-01-09  3:33   ` David Gibson
2019-01-09 13:08   ` Michael Ellerman
2019-01-09 13:38     ` Cédric Le Goater
2019-01-07 18:43 ` [PATCH 02/19] powerpc/xive: add OPAL extensions for the XIVE native exploitation support Cédric Le Goater
2019-01-09  4:26   ` David Gibson
2019-01-07 18:43 ` [PATCH 03/19] KVM: PPC: Book3S HV: check the IRQ controller type Cédric Le Goater
2019-01-09  4:27   ` David Gibson
2019-01-22  4:56   ` Paul Mackerras
2019-01-23 16:24     ` Cédric Le Goater
2019-02-04  0:50       ` David Gibson
2019-02-04 10:16         ` Cédric Le Goater
2019-01-07 18:43 ` [PATCH 04/19] KVM: PPC: Book3S HV: export services for the XIVE native exploitation device Cédric Le Goater
2019-01-11  4:09   ` David Gibson
2019-01-07 18:43 ` [PATCH 05/19] KVM: PPC: Book3S HV: add a new KVM device for the XIVE native exploitation mode Cédric Le Goater
2019-01-22  5:05   ` Paul Mackerras
2019-01-23 16:28     ` Cédric Le Goater
2019-01-28 17:35     ` Cédric Le Goater
2019-01-30  4:29       ` Paul Mackerras
2019-01-30  7:01         ` Cédric Le Goater
2019-01-31  3:01           ` Paul Mackerras
2019-02-01 17:03             ` Cédric Le Goater
2019-02-04  4:25   ` David Gibson
2019-02-04 11:19     ` Cédric Le Goater
2019-02-05  5:26       ` David Gibson
2019-01-07 18:43 ` [PATCH 06/19] KVM: PPC: Book3S HV: add a GET_ESB_FD control to the XIVE native device Cédric Le Goater
2019-01-22  5:09   ` Paul Mackerras
2019-01-23 16:48     ` Cédric Le Goater
2019-02-04  4:45   ` David Gibson
2019-02-04 11:30     ` Cédric Le Goater
2019-02-05  5:28       ` David Gibson
2019-02-05 12:55         ` Cédric Le Goater
2019-02-06  1:23           ` David Gibson
2019-02-06  7:21             ` Cédric Le Goater
2019-02-07  2:49               ` David Gibson
2019-02-07  9:03                 ` Cédric Le Goater
2019-02-08  5:15                   ` David Gibson
2019-02-08  7:58                     ` Cédric Le Goater
2019-02-08 21:53                       ` Paul Mackerras
2019-02-09  9:41                         ` Cédric Le Goater
2019-02-11  2:38                           ` David Gibson
2019-02-11  6:42                             ` Benjamin Herrenschmidt
2019-02-12 22:07                               ` Cédric Le Goater
2019-01-07 18:43 ` [PATCH 07/19] KVM: PPC: Book3S HV: add a GET_TIMA_FD control to " Cédric Le Goater
2019-01-07 18:43 ` [PATCH 08/19] KVM: PPC: Book3S HV: add a VC_BASE control to the " Cédric Le Goater
2019-01-22  5:14   ` Paul Mackerras
2019-01-23 16:56     ` Cédric Le Goater
2019-02-04  4:49       ` David Gibson
2019-02-04 15:36         ` Cédric Le Goater
2019-01-07 18:43 ` [PATCH 09/19] KVM: PPC: Book3S HV: add a SET_SOURCE " Cédric Le Goater
2019-02-04  4:57   ` David Gibson
2019-02-04 19:07     ` Cédric Le Goater
2019-02-05  5:35       ` David Gibson
2019-02-05 13:39         ` Cédric Le Goater
2019-01-07 18:43 ` [PATCH 10/19] KVM: PPC: Book3S HV: add a EISN attribute to kvmppc_xive_irq_state Cédric Le Goater
2019-01-07 18:43 ` [PATCH 11/19] KVM: PPC: Book3S HV: add support for the XIVE native exploitation mode hcalls Cédric Le Goater
2019-01-22  5:23   ` Paul Mackerras
2019-01-23  6:44     ` Benjamin Herrenschmidt
2019-01-23  8:48       ` Cédric Le Goater
2019-01-23 10:26         ` Paul Mackerras
2019-01-23 10:48           ` Cédric Le Goater
2019-01-23 21:23           ` Benjamin Herrenschmidt
2019-01-07 18:43 ` [PATCH 12/19] KVM: PPC: Book3S HV: record guest queue page address Cédric Le Goater
2019-02-04  5:15   ` David Gibson
2019-02-04 15:37     ` Cédric Le Goater
2019-01-07 18:43 ` [PATCH 13/19] KVM: PPC: Book3S HV: add a SYNC control for the XIVE native migration Cédric Le Goater
2019-02-04  5:17   ` David Gibson
2019-02-04 15:39     ` Cédric Le Goater
2019-01-07 18:43 ` [PATCH 14/19] KVM: PPC: Book3S HV: add a control to make the XIVE EQ pages dirty Cédric Le Goater
2019-02-04  5:18   ` David Gibson
2019-02-04 15:46     ` Cédric Le Goater
2019-02-05  5:30       ` David Gibson
2019-01-07 18:43 ` [PATCH 15/19] KVM: PPC: Book3S HV: add get/set accessors for the source configuration Cédric Le Goater
2019-02-04  5:21   ` David Gibson
2019-02-04 16:07     ` Cédric Le Goater
2019-02-05  5:32       ` David Gibson
2019-02-05 13:03         ` Cédric Le Goater
2019-02-06  1:23           ` David Gibson
2019-02-06  1:24             ` David Gibson
2019-02-06  7:07               ` Cédric Le Goater
2019-02-07  2:48                 ` David Gibson
2019-02-07  9:13                   ` Cédric Le Goater
2019-02-08  5:15                     ` David Gibson
2019-02-14 16:50                       ` Cédric Le Goater
2019-01-07 18:43 ` [PATCH 16/19] KVM: PPC: Book3S HV: add get/set accessors for the EQ configuration Cédric Le Goater
2019-02-04  5:24   ` David Gibson
2019-02-05 17:45     ` Cédric Le Goater
2019-01-07 19:10 ` [PATCH 17/19] KVM: PPC: Book3S HV: add get/set accessors for the VP XIVE state Cédric Le Goater
2019-01-07 19:10   ` [PATCH 18/19] KVM: PPC: Book3S HV: add passthrough support Cédric Le Goater
2019-01-22  5:26     ` Paul Mackerras
2019-01-23  6:45       ` Benjamin Herrenschmidt
2019-01-23 10:30         ` Paul Mackerras
2019-01-23 11:07           ` Cédric Le Goater
2019-01-28  6:13             ` Paul Mackerras
2019-01-28 18:26               ` Cédric Le Goater
2019-01-29  2:45                 ` Paul Mackerras
2019-01-29 13:47                   ` Cédric Le Goater
2019-01-30  6:20                     ` Paul Mackerras
2019-01-30 15:54                       ` Cédric Le Goater
2019-01-31  2:48                         ` Paul Mackerras
2019-01-29  4:12                 ` Paul Mackerras
2019-01-29 17:44                   ` Cédric Le Goater
2019-01-30  5:55                     ` Paul Mackerras
2019-01-30  7:06                       ` Cédric Le Goater
2019-01-23 21:25           ` Benjamin Herrenschmidt [this message]
2019-01-24  8:41             ` Cédric Le Goater
2019-01-28  4:43             ` Paul Mackerras
2019-01-29 13:46               ` Cédric Le Goater
2019-01-07 19:10   ` [PATCH 19/19] KVM: introduce a KVM_DELETE_DEVICE ioctl Cédric Le Goater
2019-01-22  5:42     ` Paul Mackerras
2019-01-23 18:39       ` Cédric Le Goater
2019-01-23 21:32         ` Benjamin Herrenschmidt
2019-02-04  5:26   ` [PATCH 17/19] KVM: PPC: Book3S HV: add get/set accessors for the VP XIVE state David Gibson
2019-02-04 18:57     ` Cédric Le Goater
2019-02-05  5:33       ` David Gibson
2019-02-05 11:58         ` Cédric Le Goater
2019-02-06  1:19           ` David Gibson
2019-01-22  4:46 ` [PATCH 00/19] KVM: PPC: Book3S HV: add XIVE native exploitation mode Paul Mackerras
2019-01-23 19:07   ` Cédric Le Goater
2019-01-23 21:35     ` Benjamin Herrenschmidt
2019-01-26  8:25       ` Cédric Le Goater
2019-02-04  5:36         ` David Gibson
2019-02-05 11:31           ` Cédric Le Goater
2019-02-05 22:13             ` Paul Mackerras
2019-02-06  1:18               ` David Gibson
2019-02-06  7:35                 ` Cédric Le Goater
2019-02-07  2:51                   ` David Gibson
2019-02-07  8:31                     ` Cédric Le Goater
2019-02-08  5:07                       ` David Gibson
2019-02-08  7:38                         ` Cédric Le Goater
2019-01-28  5:51     ` Paul Mackerras
2019-01-29 13:51       ` Cédric Le Goater
2019-01-30  5:40         ` Paul Mackerras
2019-01-30 15:36           ` Cédric Le Goater

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