From: Linas Vepstas <linasvepstas@gmail.com>
To: Niklas Schnelle <schnelle@linux.ibm.com>
Cc: linux-s390@vger.kernel.org, Pierre Morel <pmorel@linux.ibm.com>,
Matthew Rosato <mjrosato@linux.ibm.com>,
"linux-kernel@vger.kernel.org" <linux-kernel@vger.kernel.org>,
Oliver O'Halloran <oohall@gmail.com>,
Bjorn Helgaas <bhelgaas@google.com>,
linuxppc-dev@lists.ozlabs.org
Subject: Re: [PATCH 0/5] s390/pci: automatic error recovery
Date: Mon, 6 Sep 2021 21:05:14 -0500 [thread overview]
Message-ID: <CAHrUA34TK6U4TB34FHejott9TdFvSgAedOpmro-Uj2ZwnvzecQ@mail.gmail.com> (raw)
In-Reply-To: <20210906094927.524106-1-schnelle@linux.ibm.com>
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On Mon, Sep 6, 2021 at 4:49 AM Niklas Schnelle <schnelle@linux.ibm.com>
wrote:
> I believe we might be the first
> implementation of PCI device recovery in a virtualized setting requiring
> us to
> coordinate the device reset with the hypervisor platform by issuing a
> disable
> and re-enable to the platform as well as starting the recovery following
> a platform event.
>
I recall none of the details, but SRIOV is a standardized system for
sharing a PCI device across multiple virtual machines. It has detailed info
on what the hypervisor must do, and what the local OS instance must do to
accomplish this. It's part of the PCI standard, and its more than a decade
old now, maybe two. Being a part of the PCI standard, it was interoperable
with error recovery, to the best of my recollection. At the time it was
introduced, it got pushed very aggressively. The x86 hypervisor vendors
were aiming at the heart of zseries, and were militant about it.
-- Linas
--
Patrick: Are they laughing at us?
Sponge Bob: No, Patrick, they are laughing next to us.
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next prev parent reply other threads:[~2021-09-07 3:00 UTC|newest]
Thread overview: 38+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-09-06 9:49 [PATCH 0/5] s390/pci: automatic error recovery Niklas Schnelle
2021-09-06 9:49 ` Niklas Schnelle
2021-09-06 9:49 ` [PATCH 1/5] s390/pci: refresh function handle in iomap Niklas Schnelle
2021-09-06 9:49 ` Niklas Schnelle
2021-09-06 9:49 ` [PATCH 2/5] s390/pci: implement reset_slot for hotplug slot Niklas Schnelle
2021-09-06 9:49 ` Niklas Schnelle
2021-09-06 9:49 ` [PATCH 3/5] PCI: Move pci_dev_is/assign_added() to pci.h Niklas Schnelle
2021-09-06 9:49 ` Niklas Schnelle
2021-09-07 0:22 ` kernel test robot
2021-09-07 0:22 ` kernel test robot
2021-09-07 0:22 ` kernel test robot
2021-09-07 0:25 ` kernel test robot
2021-09-07 0:25 ` kernel test robot
2021-09-07 0:25 ` kernel test robot
2021-09-07 7:51 ` Andy Shevchenko
2021-09-07 7:51 ` Andy Shevchenko
2021-09-07 7:51 ` Andy Shevchenko
2021-09-07 8:14 ` Niklas Schnelle
2021-09-07 8:14 ` Niklas Schnelle
2021-09-07 8:14 ` Niklas Schnelle
2021-09-06 9:49 ` [PATCH 4/5] PCI: Export pci_dev_lock() Niklas Schnelle
2021-09-06 9:49 ` Niklas Schnelle
2021-09-06 9:49 ` [PATCH 5/5] s390/pci: implement minimal PCI error recovery Niklas Schnelle
2021-09-06 9:49 ` Niklas Schnelle
2021-09-07 2:04 ` [PATCH 0/5] s390/pci: automatic " Oliver O'Halloran
2021-09-07 2:04 ` Oliver O'Halloran
2021-09-07 8:45 ` Niklas Schnelle
2021-09-07 8:45 ` Niklas Schnelle
2021-09-07 12:21 ` Niklas Schnelle
2021-09-07 12:21 ` Niklas Schnelle
2021-09-08 1:37 ` Oliver O'Halloran
2021-09-08 1:37 ` Oliver O'Halloran
2021-09-08 8:09 ` Niklas Schnelle
2021-09-08 8:09 ` Niklas Schnelle
2021-09-07 2:05 ` Linas Vepstas [this message]
2021-09-07 2:10 ` Fwd: " Linas Vepstas
2021-09-07 7:49 ` Niklas Schnelle
2021-09-07 7:49 ` Niklas Schnelle
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