From: Alex Williamson <alex.williamson@redhat.com>
To: linux-acpi@vger.kernel.org, linux-pci@vger.kernel.org
Cc: bhelgaas@google.com, rjw@rjwysocki.net,
linux-kernel@vger.kernel.org, lenb@kernel.org
Subject: [PATCH 0/2] ACPI / PCI: Fix _PRT lookup for ARI enabled devices
Date: Tue, 26 May 2015 11:53:55 -0600 [thread overview]
Message-ID: <20150526174611.31963.91186.stgit@gimli.home> (raw)
In most cases we only use ARI with SR-IOV VFs, which do not support
INTx and therefore never hit this problem. However, some non-SR-IOV
implementations create multiple PFs, extending beyond the standard
3-bit function numbers with ARI, and do support INTx for those
additional functions. This can happen with Solarflare SFC9120
adapters. The host driver typically doesn't use INTx, so we also
haven't noticed this problem on bare metal, but when we attempt to
assign the device to a VM using vfio-pci, we fail trying to setup
default INTx signaling. Thanks,
Alex
---
Alex Williamson (2):
PCI: Move pci_ari_enabled() to global header
ACPI / PCI: Account for ARI in _PRT lookups
drivers/acpi/pci_irq.c | 4 ++--
drivers/pci/pci.h | 11 -----------
include/linux/pci.h | 11 +++++++++++
3 files changed, 13 insertions(+), 13 deletions(-)
next reply other threads:[~2015-05-26 17:53 UTC|newest]
Thread overview: 6+ messages / expand[flat|nested] mbox.gz Atom feed top
2015-05-26 17:53 Alex Williamson [this message]
2015-05-26 17:54 ` [PATCH 1/2] PCI: Move pci_ari_enabled() to global header Alex Williamson
2015-05-26 17:54 ` [PATCH 2/2] ACPI / PCI: Account for ARI in _PRT lookups Alex Williamson
2015-05-26 20:06 ` Don Dutile
2015-05-26 20:42 ` Alex Williamson
2015-05-26 20:58 ` Don Dutile
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