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From: Nicholas Piggin <npiggin@gmail.com>
To: Haren Myneni <haren@linux.ibm.com>, mpe@ellerman.id.au
Cc: mikey@neuling.org, ajd@linux.ibm.com, hch@infradead.org,
	oohall@gmail.com, sukadev@linux.vnet.ibm.com,
	linuxppc-dev@lists.ozlabs.org, herbert@gondor.apana.org.au
Subject: Re: [PATCH v8 04/14] powerpc/vas: Alloc and setup IRQ and trigger port address
Date: Mon, 23 Mar 2020 11:06:05 +1000	[thread overview]
Message-ID: <1584923504.tc7m3hl8sq.astroid@bobo.none> (raw)
In-Reply-To: <1584598473.9256.15248.camel@hbabu-laptop>

Haren Myneni's on March 19, 2020 4:14 pm:
> 
> Alloc IRQ and get trigger port address for each VAS instance. Kernel
> register this IRQ per VAS instance and sets this port for each send
> window. NX interrupts the kernel when it sees page fault.

Again, should cc Cedric and Greg for XIVE / interrupt stuff. And
for patch 2/14.

The changelogs could use a bit of work. They're hard to read, and it can 
be a bit hard to decipher "why".

  Allocate a xive irq on each chip with a vas instance. The NX 
  coprocessor raises a host CPU interrupt via vas if it encounters a
  page fault on an effective address. Subsequent patches register the
  trigger port with the NX coprocessor, and create a vas fault handler
  for this interrupt mapping.

Don't know if the technical details are correct, but something like that
in structure.

Thanks,
Nick


  reply	other threads:[~2020-03-23  1:12 UTC|newest]

Thread overview: 44+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2020-03-19  6:08 [PATCH v8 00/14] powerpc/vas: Page fault handling for user space NX requests Haren Myneni
2020-03-19  6:12 ` [PATCH v8 01/14] powerpc/xive: Define xive_native_alloc_irq_on_chip() Haren Myneni
2020-03-23  0:20   ` Nicholas Piggin
2020-03-23  8:32   ` Cédric Le Goater
2020-03-24 13:48   ` Cédric Le Goater
2020-03-19  6:13 ` [PATCH v8 02/14] powerpc/xive: Define xive_native_alloc_get_irq_info() Haren Myneni
2020-03-23  8:52   ` Cédric Le Goater
2020-03-24 13:51   ` Cédric Le Goater
2020-03-19  6:13 ` [PATCH v8 03/14] powerpc/vas: Define nx_fault_stamp in coprocessor_request_block Haren Myneni
2020-03-23  0:30   ` Nicholas Piggin
2020-03-23  0:57     ` Haren Myneni
2020-03-23  1:30       ` Nicholas Piggin
2020-03-23 11:32     ` Michael Ellerman
2020-03-23 18:13       ` Haren Myneni
2020-03-25 10:44         ` Michael Ellerman
2020-03-19  6:14 ` [PATCH v8 04/14] powerpc/vas: Alloc and setup IRQ and trigger port address Haren Myneni
2020-03-23  1:06   ` Nicholas Piggin [this message]
2020-03-23  9:06   ` Cédric Le Goater
2020-03-23  9:27     ` Cédric Le Goater
2020-03-23 19:02       ` Haren Myneni
2020-03-24 12:20         ` Cédric Le Goater
2020-03-24  2:26       ` Oliver O'Halloran
2020-03-24 13:27         ` Cédric Le Goater
2020-03-24 14:48   ` Cédric Le Goater
2020-03-24 21:06     ` Haren Myneni
2020-03-19  6:15 ` [PATCH v8 05/14] powerpc/vas: Setup fault window per VAS instance Haren Myneni
2020-03-19  6:15 ` [PATCH v8 06/14] powerpc/vas: Setup thread IRQ handler " Haren Myneni
2020-03-23  2:23   ` Nicholas Piggin
2020-03-25  2:58     ` Haren Myneni
2020-03-19  6:16 ` [PATCH v8 07/14] powerpc/vas: Register NX with fault window ID and IRQ port value Haren Myneni
2020-03-19  6:16 ` [PATCH v8 08/14] powerpc/vas: Take reference to PID and mm for user space windows Haren Myneni
2020-03-23  2:34   ` Nicholas Piggin
2020-03-19  6:17 ` [PATCH v8 09/14] powerpc/vas: Update CSB and notify process for fault CRBs Haren Myneni
2020-03-23  2:37   ` Nicholas Piggin
2020-03-19  6:18 ` [PATCH v8 10/14] powerpc/vas: Print CRB and FIFO values Haren Myneni
2020-03-19  6:18 ` [PATCH v8 11/14] powerpc/vas: Do not use default credits for receive window Haren Myneni
2020-03-23  2:40   ` Nicholas Piggin
2020-03-25  3:04     ` Haren Myneni
2020-03-19  6:19 ` [PATCH v8 12/14] powerpc/vas: Return credits after handling fault Haren Myneni
2020-03-23  2:44   ` Nicholas Piggin
2020-03-25  3:35     ` Haren Myneni
2020-03-19  6:19 ` [PATCH v8 13/14] powerpc/vas: Display process stuck message Haren Myneni
2020-03-19  6:20 ` [PATCH v8 14/14] powerpc/vas: Free send window in VAS instance after credits returned Haren Myneni
2020-03-23  8:59 ` [PATCH v8 00/14] powerpc/vas: Page fault handling for user space NX requests Cédric Le Goater

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